use axum::{
    extract::{Multipart, State},
    http::StatusCode,
    response::Json,
    routing::{get, post},
    Router,
};
use serde::{Deserialize, Serialize};
use sqlx::Row;
use std::path::PathBuf;
use std::sync::Arc;

use crate::api::types::AppState;
use crate::core::db::schema;
use crate::core::db::PostgresDb;
use crate::core::db::QdrantDb;
use crate::core::progress::{AgentPhase, AgentProgress, AgentStats, publish_agent_progress};
use crate::core::db::redis_client::RedisClient;

pub fn identity_agent_routes() -> Router<AppState> {
    Router::new()
        .route(
            "/api/v1/agents/identity/match-from-photo",
            post(match_from_photo),
        )
        .route(
            "/api/v1/agents/identity/match-from-trace",
            post(match_from_trace),
        )
        .route(
            "/api/v1/agents/identity/generate-seeds",
            post(generate_seeds_handler),
        )
        .route("/api/v1/agents/identity/run", post(run_identity_handler))
        .route(
            "/api/v1/agents/identity/confirm",
            post(confirm_identity_handler),
        )
}

#[derive(Debug, Serialize)]
pub struct IdentityResult {
    pub identity_id: String,
    pub person_ids: Vec<String>,
    pub speaker_ids: Vec<String>,
    pub confidence: f64,
    pub evidence: IdentityEvidence,
    pub reasoning: String,
}

#[derive(Debug, Serialize)]
pub struct IdentityEvidence {
    pub face_similarity: Option<f64>,
    pub speaker_overlap: f64,
    pub time_overlap: f64,
    pub frame_ratio: f64,
}

#[derive(Debug, Serialize)]
struct MatchFromPhotoResponse {
    success: bool,
    identity_uuid: String,
    file_uuid: String,
    matches: usize,
    traces_matched: Vec<i32>,
    message: String,
}

async fn match_from_photo(
    State(state): State<AppState>,
    mut multipart: Multipart,
) -> Result<Json<MatchFromPhotoResponse>, (StatusCode, Json<serde_json::Value>)> {
    let mut identity_uuid = String::new();
    let mut file_uuid = String::new();
    let mut image_data: Option<Vec<u8>> = None;

    while let Ok(Some(field)) = multipart.next_field().await {
        let name = field.name().unwrap_or("").to_string();
        match name.as_str() {
            "identity_uuid" => {
                identity_uuid = field.text().await.unwrap_or_default();
            }
            "file_uuid" => {
                file_uuid = field.text().await.unwrap_or_default();
            }
            "image" => {
                image_data = Some(field.bytes().await.unwrap_or_default().to_vec());
            }
            _ => {}
        }
    }

    let uuid_clean = identity_uuid.replace('-', "");
    if uuid_clean.is_empty() || file_uuid.is_empty() {
        return Err((
            StatusCode::BAD_REQUEST,
            Json(serde_json::json!({
                "success": false, "message": "identity_uuid and file_uuid are required"
            })),
        ));
    }
    let data = image_data.ok_or_else(|| {
        (
            StatusCode::BAD_REQUEST,
            Json(serde_json::json!({
                "success": false, "message": "No image field found. Use field name 'image'."
            })),
        )
    })?;

    // 1. Save uploaded image to temp
    let scripts_dir = std::env::var("MOMENTRY_SCRIPTS_DIR")
        .unwrap_or_else(|_| "/Users/accusys/momentry_core_0.1/scripts".to_string());
    let python_path = std::env::var("MOMENTRY_PYTHON_PATH")
        .unwrap_or_else(|_| "/opt/homebrew/bin/python3.11".to_string());
    let temp_dir = std::env::temp_dir().join("momentry_match_face");
    std::fs::create_dir_all(&temp_dir).map_err(|e| {
        (
            StatusCode::INTERNAL_SERVER_ERROR,
            Json(serde_json::json!({"message": format!("Failed to create temp dir: {}", e)})),
        )
    })?;
    let temp_img = temp_dir.join(format!("{}.jpg", uuid_clean));
    std::fs::write(&temp_img, &data).map_err(|e| {
        (
            StatusCode::INTERNAL_SERVER_ERROR,
            Json(serde_json::json!({"message": format!("Failed to save temp image: {}", e)})),
        )
    })?;

    // 2. Extract face embedding via Python script
    let extract_script = std::path::Path::new(&scripts_dir).join("extract_face_embedding.py");
    let output = tokio::process::Command::new(&*python_path)
        .arg(&extract_script)
        .arg(&temp_img)
        .output()
        .await
        .map_err(|e| {
            (
                StatusCode::INTERNAL_SERVER_ERROR,
                Json(serde_json::json!({"message": format!("Failed to run extractor: {}", e)})),
            )
        })?;

    let _ = std::fs::remove_file(&temp_img);

    if !output.status.success() {
        let stderr = String::from_utf8_lossy(&output.stderr);
        return Err((
            StatusCode::BAD_REQUEST,
            Json(serde_json::json!({
                "success": false, "message": format!("Face extraction failed: {}", stderr)
            })),
        ));
    }

    let stdout = String::from_utf8_lossy(&output.stdout);
    let extract_result: serde_json::Value = serde_json::from_str(&stdout).map_err(|_| {
        (
            StatusCode::INTERNAL_SERVER_ERROR,
            Json(serde_json::json!({"message": "Failed to parse extractor output"})),
        )
    })?;

    let embedding: Vec<f64> = serde_json::from_value(
        extract_result
            .get("embedding")
            .ok_or_else(|| {
                (
                    StatusCode::BAD_REQUEST,
                    Json(serde_json::json!({"message": "No embedding in extractor output"})),
                )
            })?
            .clone(),
    )
    .map_err(|_| {
        (
            StatusCode::INTERNAL_SERVER_ERROR,
            Json(serde_json::json!({"message": "Invalid embedding format"})),
        )
    })?;

    let embedding_f32: Vec<f32> = embedding.into_iter().map(|v| v as f32).collect();

    // 3. Look up identity internal ID
    let id_table = schema::table_name("identities");
    let identity_id_row: Option<(i32,)> = sqlx::query_as(&format!(
        "SELECT id FROM {} WHERE REPLACE(uuid::text, '-', '') = $1",
        id_table
    ))
    .bind(&uuid_clean)
    .fetch_optional(state.db.pool())
    .await
    .map_err(|e| {
        (
            StatusCode::INTERNAL_SERVER_ERROR,
            Json(serde_json::json!({"message": format!("DB error: {}", e)})),
        )
    })?;

    let identity_id = match identity_id_row {
        Some((id,)) => id,
        None => {
            return Err((
                StatusCode::NOT_FOUND,
                Json(serde_json::json!({
                    "success": false, "message": "Identity not found"
                })),
            ))
        }
    };

    // 4. Find best matching trace via Qdrant _faces search
    let qdrant = QdrantDb::new();

    let best_match: Option<(i32, f64)> = match qdrant.search_face_collection(
        "_faces",
        &embedding_f32,
        1,
        "file_uuid",
        "",
        Some(&file_uuid),
    ).await {
        Ok(hits) if !hits.is_empty() => {
            let (score, payload) = &hits[0];
            let trace_id = payload.get("trace_id").and_then(|v| v.as_i64()).unwrap_or(0) as i32;
            Some((trace_id, *score))
        }
        _ => None,
    };

    // 5. Update best match in Qdrant _faces (trace-scoped)
    let mut traces_matched: Vec<i32> = Vec::new();
    if let Some((fb_trace, fb_sim)) = best_match {
        let qdrant = QdrantDb::new();
        let filter = serde_json::json!({
            "must": [
                {"key": "file_uuid", "match": {"value": file_uuid}},
                {"key": "trace_id", "match": {"value": fb_trace}}
            ]
        });
        let payload = serde_json::json!({"identity_id": identity_id});
        if let Err(e) = qdrant
            .update_payload_by_filter("_faces", filter, payload)
            .await
        {
            tracing::warn!("[match_from_photo] Qdrant update failed: {}", e);
        }
        traces_matched.push(fb_trace);

        // 6. Save identity file
        let _ = crate::core::identity::storage::save_identity_file(&*state.db, &uuid_clean).await;

        Ok(Json(MatchFromPhotoResponse {
            success: true,
            identity_uuid: uuid_clean,
            file_uuid,
            matches: 1,
            traces_matched,
            message: format!(
                "Best trace: trace_id={}, similarity={:.4}",
                fb_trace, fb_sim
            ),
        }))
    } else {
        Ok(Json(MatchFromPhotoResponse {
            success: true,
            identity_uuid: uuid_clean,
            file_uuid,
            matches: 0,
            traces_matched,
            message: "No matching face found in video".to_string(),
        }))
    }
}

#[derive(Debug, Deserialize)]
struct MatchFromTraceRequest {
    file_uuid: String,
    trace_id: i32,
    identity_uuid: String,
}

async fn match_from_trace(
    State(state): State<AppState>,
    Json(req): Json<MatchFromTraceRequest>,
) -> Result<Json<MatchFromPhotoResponse>, (StatusCode, Json<serde_json::Value>)> {
    let uuid_clean = req.identity_uuid.replace('-', "");

    // 1. Get face embeddings from Qdrant _faces for this trace
    let qdrant = QdrantDb::new();
    let trace_filter = serde_json::json!({
        "must": [
            {"key": "file_uuid", "match": {"value": req.file_uuid}},
            {"key": "trace_id", "match": {"value": req.trace_id}}
        ]
    });
    let points = qdrant.scroll_all_points("_faces", trace_filter, 500).await.unwrap_or_default();

    let all_faces: Vec<(Vec<f32>, i64)> = points.iter().filter_map(|p| {
        let vector = p.get("vector").and_then(|v| v.as_array())?;
        let embedding: Vec<f32> = vector.iter().filter_map(|v| v.as_f64().map(|f| f as f32)).collect();
        let frame = p["payload"]["frame"].as_i64()?;
        if embedding.len() == 512 {
            Some((embedding, frame))
        } else {
            None
        }
    }).collect();

    if all_faces.is_empty() {
        return Err((
            StatusCode::NOT_FOUND,
            Json(serde_json::json!({
                "success": false, "message": "No embedding found for this trace"
            })),
        ));
    }

    // Pick 3 samples: divide frame range into 3 segments, use face with largest area per segment
    let total = all_faces.len();
    let segments = [
        (0, total / 3),
        (total / 3, total * 2 / 3),
        (total * 2 / 3, total),
    ];

    let mut query_embeddings: Vec<Vec<f32>> = Vec::new();

    // Get bbox size info from Qdrant payload
    let face_sizes: Vec<(i64, i32)> = points.iter().filter_map(|p| {
        let frame = p["payload"]["frame"].as_i64()?;
        let bbox = &p["payload"]["bbox"];
        let w = bbox["width"].as_f64().unwrap_or(0.0) as i32;
        let h = bbox["height"].as_f64().unwrap_or(0.0) as i32;
        Some((frame, w * h))
    }).collect();

    let face_sizes_map: std::collections::HashMap<i64, i32> = face_sizes.into_iter().collect();

    for (start, end) in segments {
        let seg_start = start.min(total - 1);
        let seg_end = end.min(total);
        if seg_start >= seg_end {
            continue;
        }
        let seg_slice = &all_faces[seg_start..seg_end];
        // Pick the face with largest area within this segment
        let best_idx = seg_slice
            .iter()
            .enumerate()
            .max_by_key(|(_, f)| face_sizes_map.get(&f.1).copied().unwrap_or(0))
            .map(|(i, _)| i)
            .unwrap_or(0);
        query_embeddings.push(seg_slice[best_idx].0.clone());
    }

    if query_embeddings.is_empty() {
        query_embeddings.push(all_faces[total / 2].0.clone());
    }

    // 2. Three angles each find their best match via Qdrant; union all results
    let mut validated: Vec<(i32, i32, f64)> = Vec::new();
    let mut seen_trace_ids = std::collections::HashSet::new();

    for qemb in &query_embeddings {
        let filter = serde_json::json!({
            "must": [
                {"key": "file_uuid", "match": {"value": req.file_uuid}}
            ],
            "must_not": [
                {"key": "trace_id", "match": {"value": req.trace_id}}
            ]
        });

        let hits = match qdrant.search_face_collection(
            "_faces",
            qemb,
            1,
            "trace_id",
            &req.trace_id.to_string(),
            Some(&req.file_uuid),
        ).await {
            Ok(h) => h,
            Err(e) => {
                tracing::warn!("[match_from_trace] Qdrant search failed: {}", e);
                continue;
            }
        };

        if let Some((score, payload)) = hits.first() {
            let trace_id = payload.get("trace_id").and_then(|v| v.as_i64()).unwrap_or(0) as i32;
            if seen_trace_ids.insert(trace_id) {
                validated.push((0, trace_id, *score));
            }
        }
    }

    // 3. Look up identity internal ID
    let id_table = schema::table_name("identities");
    let identity_id_row: Option<(i32,)> = sqlx::query_as(&format!(
        "SELECT id FROM {} WHERE REPLACE(uuid::text, '-', '') = $1",
        id_table
    ))
    .bind(&uuid_clean)
    .fetch_optional(state.db.pool())
    .await
    .map_err(|e| {
        (
            StatusCode::INTERNAL_SERVER_ERROR,
            Json(serde_json::json!({"message": format!("DB error: {}", e)})),
        )
    })?;

    let identity_id = match identity_id_row {
        Some((id,)) => id,
        None => {
            return Err((
                StatusCode::NOT_FOUND,
                Json(serde_json::json!({
                    "success": false, "message": "Identity not found"
                })),
            ))
        }
    };

    // 4. Update matched traces in Qdrant _faces
    let qdrant = QdrantDb::new();
    let mut traces_matched: Vec<i32> = Vec::new();
    for (_id, trace_id, _similarity) in &validated {
        let filter = serde_json::json!({
            "must": [
                {"key": "file_uuid", "match": {"value": req.file_uuid}},
                {"key": "trace_id", "match": {"value": trace_id}}
            ]
        });
        let payload = serde_json::json!({"identity_id": identity_id});
        if let Err(e) = qdrant
            .update_payload_by_filter("_faces", filter, payload)
            .await
        {
            tracing::warn!(
                "[match-from-trace] Qdrant update failed for trace {}: {}",
                trace_id,
                e
            );
        } else if !traces_matched.contains(trace_id) {
            traces_matched.push(*trace_id);
        }
    }

    // 5. Also bind the source trace itself
    let filter = serde_json::json!({
        "must": [
            {"key": "file_uuid", "match": {"value": req.file_uuid}},
            {"key": "trace_id", "match": {"value": req.trace_id}}
        ]
    });
    let payload = serde_json::json!({"identity_id": identity_id});
    if let Err(e) = qdrant
        .update_payload_by_filter("_faces", filter, payload)
        .await
    {
        tracing::warn!(
            "[match-from-trace] Qdrant update failed for source trace {}: {}",
            req.trace_id,
            e
        );
    }
    if !traces_matched.contains(&req.trace_id) {
        traces_matched.push(req.trace_id);
    }

    // 6. Save identity file
    let _ = crate::core::identity::storage::save_identity_file(&*state.db, &uuid_clean).await;

    let match_count = validated.len() + 1;
    let face_track_count = traces_matched.len();
    Ok(Json(MatchFromPhotoResponse {
        success: true,
        identity_uuid: uuid_clean,
        file_uuid: req.file_uuid,
        matches: match_count,
        traces_matched,
        message: format!(
            "Matched {} faces ({} unique traces)",
            match_count, face_track_count
        ),
    }))
}

fn extract_persons_from_face_data(face_data: &serde_json::Value) -> Vec<PersonData> {
    let mut persons = Vec::new();
    if let Some(frames) = face_data.get("frames").and_then(|f| f.as_array()) {
        let mut person_frames_map: std::collections::HashMap<String, Vec<i32>> =
            std::collections::HashMap::new();
        for frame in frames {
            if let Some(frame_num) = frame.get("frame").and_then(|f| f.as_i64()) {
                if let Some(person_id) = frame.get("person_id").and_then(|p| p.as_str()) {
                    person_frames_map
                        .entry(person_id.to_string())
                        .or_insert_with(Vec::new)
                        .push(frame_num as i32);
                }
            }
        }
        for (person_id, frames) in person_frames_map {
            persons.push(PersonData {
                person_id,
                frames,
                avg_embedding: None,
            });
        }
    }
    persons
}

fn extract_speakers_from_asrx_data(asrx_data: &Option<serde_json::Value>) -> Vec<SpeakerData> {
    let mut speakers = Vec::new();
    if let Some(data) = asrx_data {
        if let Some(segments) = data.get("segments").and_then(|s| s.as_array()) {
            for seg in segments {
                if let (Some(start), Some(end), Some(speaker_id)) = (
                    seg.get("start_time").and_then(|v| v.as_f64()),
                    seg.get("end_time").and_then(|v| v.as_f64()),
                    seg.get("speaker_id").and_then(|v| v.as_str()),
                ) {
                    speakers.push(SpeakerData {
                        speaker_id: speaker_id.to_string(),
                        segments: vec![(start, end)],
                    });
                }
            }
        }
    }
    speakers
}

fn analyze_person_speaker_overlap(
    persons: &[PersonData],
    speakers: &[SpeakerData],
) -> Vec<IdentityResult> {
    let mut identities: Vec<IdentityResult> = Vec::new();
    let mut visited_persons: std::collections::HashSet<String> = std::collections::HashSet::new();

    for person in persons {
        if visited_persons.contains(&person.person_id) {
            continue;
        }

        let mut matched_persons = vec![person.person_id.clone()];
        let mut matched_speakers: Vec<String> = Vec::new();
        visited_persons.insert(person.person_id.clone());

        for other_person in persons {
            if visited_persons.contains(&other_person.person_id) {
                continue;
            }

            // Check if persons co-occur in time (frame proximity)
            let overlap = person
                .frames
                .iter()
                .any(|f| other_person.frames.contains(f));
            if overlap {
                matched_persons.push(other_person.person_id.clone());
                visited_persons.insert(other_person.person_id.clone());
            }
        }

        // Check speaker overlap
        let person_time_range = (
            person.frames.iter().min().copied().unwrap_or(0) as f64,
            person.frames.iter().max().copied().unwrap_or(0) as f64,
        );
        for speaker in speakers {
            let has_overlap = speaker
                .segments
                .iter()
                .any(|(start, end)| *start <= person_time_range.1 && *end >= person_time_range.0);
            if has_overlap {
                if !matched_speakers.contains(&speaker.speaker_id) {
                    matched_speakers.push(speaker.speaker_id.clone());
                }
            }
        }

        let frame_count = person.frames.len() as f64;
        let speaker_overlap = if matched_speakers.is_empty() {
            0.0
        } else {
            matched_speakers.len() as f64 / speakers.len().max(1) as f64
        };

        identities.push(IdentityResult {
            identity_id: person.person_id.clone(),
            person_ids: matched_persons.clone(),
            speaker_ids: matched_speakers.clone(),
            confidence: 0.5 + (speaker_overlap * 0.3),
            evidence: IdentityEvidence {
                face_similarity: None,
                speaker_overlap,
                time_overlap: 1.0,
                frame_ratio: frame_count / 100.0,
            },
            reasoning: format!(
                "Matched {} persons with {} speakers, overlap={:.2}",
                matched_persons.len(),
                speaker_overlap,
                speaker_overlap
            ),
        });
    }

    identities
}

#[derive(Debug)]
struct PersonData {
    person_id: String,
    frames: Vec<i32>,
    avg_embedding: Option<Vec<f64>>,
}

#[derive(Debug)]
struct SpeakerData {
    speaker_id: String,
    segments: Vec<(f64, f64)>,
}

fn cosine_similarity(a: &[f32], b: &[f32]) -> f32 {
    if a.len() != b.len() || a.is_empty() {
        return 0.0;
    }
    let dot: f32 = a.iter().zip(b).map(|(x, y)| x * y).sum();
    let na: f32 = a.iter().map(|x| x * x).sum::<f32>().sqrt();
    let nb: f32 = b.iter().map(|x| x * x).sum::<f32>().sqrt();
    if na == 0.0 || nb == 0.0 {
        0.0
    } else {
        dot / (na * nb)
    }
}

fn average_embeddings<'a>(embeddings: impl Iterator<Item = &'a Vec<f32>>) -> Vec<f32> {
    let mut count = 0usize;
    let mut sum: Option<Vec<f32>> = None;
    for emb in embeddings {
        if emb.len() != 512 {
            continue;
        }
        match &mut sum {
            None => sum = Some(emb.clone()),
            Some(s) => {
                for (i, v) in emb.iter().enumerate() {
                    s[i] += v;
                }
            }
        }
        count += 1;
    }
    if let Some(mut s) = sum {
        let c = count as f32;
        for v in &mut s {
            *v /= c;
        }
        s
    } else {
        vec![0.0f32; 512]
    }
}

/// Cluster: trace centroid + seeds from Qdrant + stranger clustering.
/// Round 1: centroid vs seeds (TH=0.55)
/// Round 2+: propagate from matched (TH=0.50)
/// Unknown: greedy stranger clustering (TH=0.40)
/// Writes identity_ref/stranger_ref to Qdrant payload, TKG nodes, and face_detections.
async fn match_faces_iterative(pool: &sqlx::PgPool, file_uuid: &str) -> anyhow::Result<usize> {
    use crate::core::processor::executor::PythonExecutor;
    use std::time::Duration;

    let executor = PythonExecutor::new()?;

    let output_dir = std::env::var("MOMENTRY_OUTPUT_DIR")
        .unwrap_or_else(|_| "/Users/accusys/momentry/output".to_string());

    let output_path = std::path::PathBuf::from(&output_dir)
        .join(file_uuid)
        .join(format!("{}.identity_match_round1.json", file_uuid));

    std::fs::create_dir_all(output_path.parent().unwrap()).ok();

    let scripts_dir = executor.script_dir();
    let python_path = executor.python_path();
    let script_path = scripts_dir.join("identity_matcher.py");

    let qdrant_url =
        std::env::var("QDRANT_URL").unwrap_or_else(|_| "http://localhost:6333".to_string());
    let qdrant_api_key =
        std::env::var("QDRANT_API_KEY").unwrap_or_else(|_| "Test3200Test3200Test3200".to_string());
    let db_url = std::env::var("DATABASE_URL")
        .unwrap_or_else(|_| "postgresql://accusys@localhost:5432/momentry".to_string());

    let db_schema = std::env::var("DATABASE_SCHEMA").unwrap_or_else(|_| "public".to_string());
    let mut cmd = tokio::process::Command::new(python_path);
    cmd.env("MOMENTRY_OUTPUT_DIR", &output_dir);
    cmd.env("DATABASE_SCHEMA", &db_schema);
    cmd.env("MOMENTRY_DB_SCHEMA", &db_schema);
    cmd.env("DATABASE_URL", &db_url);
    cmd.env("QDRANT_URL", &qdrant_url);
    cmd.env("QDRANT_API_KEY", &qdrant_api_key);
    cmd.arg(&script_path);
    cmd.arg("--file-uuid").arg(file_uuid);
    cmd.arg("--round").arg("1");
    cmd.arg("--mark-tkg");
    cmd.arg("--output").arg(&output_path);

    cmd.stdout(std::process::Stdio::piped());
    cmd.stderr(std::process::Stdio::piped());

    tracing::info!("[FaceMatch] Starting identity_matcher for {}", file_uuid);

    let output = cmd.output().await?;

    let stdout = String::from_utf8_lossy(&output.stdout);
    let stderr = String::from_utf8_lossy(&output.stderr);

    if !output.status.success() {
        tracing::error!(
            "[FaceMatch] identity_matcher failed with exit code: {:?}",
            output.status.code()
        );
        tracing::error!("[FaceMatch] stderr: {}", stderr);
        tracing::error!("[FaceMatch] stdout: {}", stdout);
        return Ok(0);
    }

    tracing::info!("[FaceMatch] stdout: {}", stdout);

    if !output_path.exists() {
        tracing::info!("[FaceMatch] No matches found for {}", file_uuid);
        return Ok(0);
    }

    let content = std::fs::read_to_string(&output_path)?;
    let result: serde_json::Value = serde_json::from_str(&content)?;

    let matched = result.get("matched").and_then(|v| v.as_i64()).unwrap_or(0) as usize;
    let tkg_updated = result
        .get("tkg_nodes_updated")
        .and_then(|v| v.as_i64())
        .unwrap_or(0) as usize;

    tracing::info!(
        "[FaceMatch] Round 1 for {}: {} matches, {} TKG nodes updated",
        file_uuid,
        matched,
        tkg_updated
    );

    Ok(matched)
}

/// Fallback: PostgreSQL-based matching (disabled - embedding column removed)
async fn match_faces_iterative_pg(pool: &sqlx::PgPool, file_uuid: &str) -> anyhow::Result<usize> {
    tracing::warn!(
        "[FaceMatch-PG] PostgreSQL matching disabled - embedding column removed for {}",
        file_uuid
    );
    Ok(0)
}

/// Bind ASRX speakers to face traces based on temporal overlap.
/// Reads face_detections (trace_id, identity_id, frame_number) and ASRX
/// segments (speaker_id, start_time, end_time), computes overlap,
/// and stores bindings in identity_bindings table.
pub async fn bind_speakers(pool: &sqlx::PgPool, file_uuid: &str) -> anyhow::Result<usize> {
    use crate::core::db::qdrant_db::QdrantDb;
    use serde_json::json;

    // Load face traces with identity_id from Qdrant _faces
    let qdrant = QdrantDb::new();
    let trace_filter = json!({
        "must": [
            {"key": "file_uuid", "match": {"value": file_uuid}},
            {"key": "identity_id", "exists": true},
            {"key": "trace_id", "match": {"value": 1}}
        ]
    });
    let points = qdrant.scroll_all_points("_faces", trace_filter, 500).await.unwrap_or_default();

    // Group by trace_id, collect frames
    let mut traces: HashMap<i32, Vec<i64>> = HashMap::new();
    for point in &points {
        let payload = &point["payload"];
        let trace_id = payload["trace_id"].as_i64().unwrap_or(0) as i32;
        let frame = payload["frame"].as_i64().unwrap_or(0);
        traces.entry(trace_id).or_default().push(frame);
    }

    // Sort frames per trace
    for frames in traces.values_mut() {
        frames.sort();
    }

    if traces.is_empty() {
        tracing::info!("[SpeakerBind] No face traces with identities");
        return Ok(0);
    }

    // Load ASRX speakers from the output JSON
    let output_dir = std::env::var("MOMENTRY_OUTPUT_DIR")
        .unwrap_or_else(|_| "/Users/accusys/momentry/output".to_string());
    let asrx_path = std::path::Path::new(&output_dir).join(format!("{}.asrx.json", file_uuid));

    let asrx_data: serde_json::Value = match std::fs::read_to_string(&asrx_path) {
        Ok(s) => serde_json::from_str(&s).unwrap_or_default(),
        Err(_) => {
            tracing::info!("[SpeakerBind] No ASRX file found");
            return Ok(0);
        }
    };

    // Extract speaker segments: speaker_id → [(start_time, end_time)]
    use std::collections::HashMap;
    let mut speakers: HashMap<String, Vec<(f64, f64)>> = HashMap::new();
    if let Some(segments) = asrx_data.get("segments").and_then(|s| s.as_array()) {
        for seg in segments {
            let sid = seg
                .get("speaker_id")
                .and_then(|s| s.as_str())
                .or_else(|| seg.get("speaker").and_then(|s| s.as_str()));
            if let Some(sid) = sid {
                let start = seg
                    .get("start_time")
                    .or_else(|| seg.get("start"))
                    .and_then(|v| v.as_f64())
                    .unwrap_or(0.0);
                let end = seg
                    .get("end_time")
                    .or_else(|| seg.get("end"))
                    .and_then(|v| v.as_f64())
                    .unwrap_or(0.0);
                speakers
                    .entry(sid.to_string())
                    .or_default()
                    .push((start, end));
            }
        }
    }

    if speakers.is_empty() {
        tracing::info!("[SpeakerBind] No speakers found in ASRX data");
        return Ok(0);
    }

    // Compute fps from video table
    let fps: f64 = sqlx::query_scalar::<_, f64>(
        "SELECT COALESCE(fps, 25.0) FROM videos WHERE file_uuid=$1"
    )
    .bind(file_uuid)
    .fetch_optional(pool)
    .await
    .ok()
    .flatten()
    .unwrap_or(25.0);

    tracing::info!(
        "[SpeakerBind] Using fps={:.3} for {} ({} traces)",
        fps,
        file_uuid,
        traces.len()
    );

    // For each trace, compute overlap with each speaker
    let mut bindings = 0usize;
    for (trace_id, frames) in &traces {
        if frames.is_empty() {
            continue;
        }

        // Get identity_id for this trace from Qdrant payload
        let identity_id: Option<i32> = points.iter()
            .find(|p| {
                p["payload"]["trace_id"].as_i64() == Some(*trace_id as i64)
                    && p["payload"]["identity_id"].as_i64().is_some()
                    && p["payload"]["identity_id"].as_i64().unwrap() > 0
            })
            .and_then(|p| p["payload"]["identity_id"].as_i64())
            .map(|id| id as i32);

        if identity_id.is_none() {
            continue;
        }
        let identity_id = identity_id.unwrap();

        // Compute overlap with each speaker
        let mut best_speaker = String::new();
        let mut best_overlap = 0usize;

        for (speaker_id, segments) in &speakers {
            let mut overlap = 0usize;
            for &fn_num in frames {
                let frame_time = fn_num as f64 / fps;
                for (start, end) in segments {
                    if frame_time >= *start && frame_time <= *end {
                        overlap += 1;
                        break;
                    }
                }
            }
            if overlap > best_overlap {
                best_overlap = overlap;
                best_speaker = speaker_id.clone();
            }
        }

        // Only bind if meaningful overlap
        let overlap_ratio = best_overlap as f64 / frames.len() as f64;
        if overlap_ratio > 0.3 && !best_speaker.is_empty() {
            let metadata = serde_json::json!({
                "trace_id": trace_id,
                "overlap_frames": best_overlap,
                "total_frames": frames.len(),
                "overlap_ratio": overlap_ratio,
            });

            let ib_table = schema::table_name("identity_bindings");
            if let Err(e) = sqlx::query(
                &format!("INSERT INTO {} (identity_id, identity_type, identity_value, confidence, metadata) \
                 VALUES ($1, 'speaker', $2, $3, $4::jsonb) \
                 ON CONFLICT (identity_id, identity_type, identity_value) \
                 DO UPDATE SET confidence = EXCLUDED.confidence, metadata = EXCLUDED.metadata", ib_table)
            )
            .bind(identity_id)
            .bind(&best_speaker)
            .bind(overlap_ratio)
            .bind(&metadata)
            .execute(pool).await
            {
                tracing::error!("[SpeakerBind] INSERT failed for trace_id={}, identity_id={}, speaker={}: {}", trace_id, identity_id, best_speaker, e);
            }

            // Also update speaker_detections with the identity_id
            let sd_table = schema::table_name("speaker_detections");
            let _ = sqlx::query(&format!(
                "UPDATE {} SET identity_id = $1, confidence = $2 \
                 WHERE file_uuid = $3 AND speaker_id = $4 AND identity_id IS NULL",
                sd_table
            ))
            .bind(identity_id)
            .bind(overlap_ratio)
            .bind(file_uuid)
            .bind(&best_speaker)
            .execute(pool)
            .await;

            bindings += 1;
        }
    }

    tracing::info!(
        "[SpeakerBind] Created {}/{} speaker bindings",
        bindings,
        traces.len()
    );
    Ok(bindings)
}

/// Pipeline-triggered entry point: runs the full identity agent for a file.
/// Reads face_clustered.json + asrx.json, extracts persons/speakers, creates identities,
/// runs iterative face matching, and binds speakers.
pub async fn run_identity_agent(
    db: &PostgresDb,
    file_uuid: &str,
    redis: Option<std::sync::Arc<RedisClient>>,
) -> anyhow::Result<()> {
    let output_dir = std::env::var("MOMENTRY_OUTPUT_DIR")
        .unwrap_or_else(|_| "/Users/accusys/momentry/output".to_string());

    let pool = db.pool();

    let mut progress = AgentProgress::new(file_uuid);
    if let Some(r) = redis.as_ref() {
        publish_agent_progress(&r, file_uuid, &progress).await;
    }

    // Step 1: Face matching (iterative TMDb matching)
    progress.update_phase(AgentPhase::TmdbMatching, 0.3, "Running face matching...");
    if let Some(r) = redis.as_ref() {
        publish_agent_progress(&r, file_uuid, &progress).await;
    }

    let matched = match_faces_iterative(pool, file_uuid).await.unwrap_or(0);
    progress.stats.tmdb_matches = matched as i64;
    progress.update_phase(AgentPhase::TmdbMatching, 1.0, &format!("Face matching: {} matches", matched));
    if let Some(r) = redis.as_ref() {
        publish_agent_progress(&r, file_uuid, &progress).await;
    }

    // Step 2: Load face_clustered.json and create identities
    progress.update_phase(AgentPhase::FaceClustering, 0.5, "Loading face clusters...");
    if let Some(r) = redis.as_ref() {
        publish_agent_progress(&r, file_uuid, &progress).await;
    }

    let video_dir = PathBuf::from(&output_dir).join(file_uuid);
    let face_clustered_path = video_dir.join(format!("{}.face_clustered.json", file_uuid));
    let face_clustered_path = if face_clustered_path.exists() {
        face_clustered_path
    } else {
        PathBuf::from(&output_dir).join(format!("{}.face_clustered.json", file_uuid))
    };

    if face_clustered_path.exists() {
        let face_data: serde_json::Value =
            std::fs::read_to_string(&face_clustered_path)?.parse()?;
        let asrx_path = video_dir.join(format!("{}.asrx.json", file_uuid));
        let asrx_data: Option<serde_json::Value> = if asrx_path.exists() {
            Some(std::fs::read_to_string(&asrx_path)?.parse()?)
        } else {
            None
        };

        let persons = extract_persons_from_face_data(&face_data);
        let speakers = extract_speakers_from_asrx_data(&asrx_data);
        let identities = analyze_person_speaker_overlap(&persons, &speakers);

        progress.stats.clusters = identities.len() as i64;

        let _ = identities.len();
        if !identities.is_empty() {
            let metadata = serde_json::json!({
                "source": "identity_agent",
                "speaker_ids": identities[0].speaker_ids,
                "confidence": identities[0].confidence,
                "evidence": {
                    "speaker_overlap": identities[0].evidence.speaker_overlap,
                    "frame_ratio": identities[0].evidence.frame_ratio,
                },
                "reasoning": identities[0].reasoning,
            });
            let _ = sqlx::query(&format!(
                "INSERT INTO {} (file_uuid, trace_id, metadata) \
                     VALUES ($1, NULL, $2::jsonb) ON CONFLICT DO NOTHING",
                schema::table_name("strangers")
            ))
            .bind(file_uuid)
            .bind(&metadata)
            .execute(pool)
            .await;
        }
        progress.stats.identities_created = identities.len() as i64;
        progress.update_phase(AgentPhase::IdentityCreation, 1.0, &format!(
            "Created {} identities from clusters", identities.len()
        ));
        if let Some(r) = redis.as_ref() {
            publish_agent_progress(&r, file_uuid, &progress).await;
        }
        tracing::info!(
            "[IdentityAgent] Analyzed {} face clusters from face_clustered for {}",
            identities.len(),
            file_uuid
        );
    } else {
        tracing::warn!(
            "[IdentityAgent] face_clustered.json not found for {}, skipping identity creation",
            file_uuid
        );
        progress.update_phase(AgentPhase::IdentityCreation, 0.0, "No face_clustered.json");
        if let Some(r) = redis.as_ref() {
            publish_agent_progress(&r, file_uuid, &progress).await;
        }
    }

    // Step 3: Speaker binding
    progress.update_phase(AgentPhase::SpeakerBinding, 0.5, "Binding speakers...");
    if let Some(r) = redis.as_ref() {
        publish_agent_progress(&r, file_uuid, &progress).await;
    }

    let bound = bind_speakers(pool, file_uuid).await.unwrap_or(0);
    progress.stats.speaker_bindings = bound as i64;
    progress.update_phase(AgentPhase::SpeakerBinding, 1.0, &format!("Speaker binding: {} bound", bound));
    if let Some(r) = redis.as_ref() {
        publish_agent_progress(&r, file_uuid, &progress).await;
    }

    progress.mark_completed();
    if let Some(r) = redis.as_ref() {
        publish_agent_progress(&r, file_uuid, &progress).await;
    }

    tracing::info!(
        "[IdentityAgent] Done for {}: {} face matches, {} speaker bindings",
        file_uuid,
        matched,
        bound
    );
    Ok(())
}

/// API handler: POST /api/v1/agents/identity/generate-seeds
async fn generate_seeds_handler(
    State(state): State<AppState>,
) -> Result<Json<serde_json::Value>, (StatusCode, Json<serde_json::Value>)> {
    let db = &state.db;
    let pool = db.pool();

    let count = generate_seed_embeddings(db).await.map_err(|e| {
        (
            StatusCode::INTERNAL_SERVER_ERROR,
            Json(serde_json::json!({"success": false, "message": format!("{}", e)})),
        )
    })?;

    // Auto-trigger identity agent for all ready files
    if count > 0 {
        let ready_files = find_ready_files(pool).await.unwrap_or_default();
        if !ready_files.is_empty() {
            tracing::info!(
                "[GenerateSeeds] Auto-triggering identity agent for {} files: {:?}",
                ready_files.len(),
                ready_files
            );
            for file_uuid in &ready_files {
                let db = state.db.clone();
                let redis = crate::core::db::RedisClient::new().ok().map(Arc::new);
                let fid = file_uuid.clone();
                tokio::spawn(async move {
                    match run_identity_agent(&db, &fid, redis).await {
                        Ok(_) => {
                            tracing::info!("[GenerateSeeds] Identity agent completed for {}", fid)
                        }
                        Err(e) => tracing::warn!(
                            "[GenerateSeeds] Identity agent failed for {}: {}",
                            fid,
                            e
                        ),
                    }
                });
            }
        }
    }

    Ok(Json(serde_json::json!({
        "success": true,
        "message": format!("Generated {} seed embeddings", count),
        "count": count
    })))
}

/// Find videos that are ready for identity processing (have face embeddings in Qdrant).
async fn find_ready_files(pool: &sqlx::PgPool) -> anyhow::Result<Vec<String>> {
    use crate::core::db::qdrant_db::QdrantDb;
    use serde_json::json;

    let qdrant = QdrantDb::new();
    // Find files with faces that don't have identity_id set
    let filter = json!({
        "must": [
            {"key": "identity_id", "match": {"value": null}}
        ]
    });
    let points = qdrant.scroll_all_points("_faces", filter, 1000).await.unwrap_or_default();

    let mut file_uuids: std::collections::HashSet<String> = std::collections::HashSet::new();
    for point in &points {
        if let Some(fu) = point["payload"]["file_uuid"].as_str() {
            file_uuids.insert(fu.to_string());
        }
    }

    Ok(file_uuids.into_iter().collect())
}

/// API handler: POST /api/v1/agents/identity/run
async fn run_identity_handler(
    State(state): State<AppState>,
    axum::Json(body): axum::Json<serde_json::Value>,
) -> Result<Json<serde_json::Value>, (StatusCode, Json<serde_json::Value>)> {
    let file_uuid = body
        .get("file_uuid")
        .and_then(|v| v.as_str())
        .ok_or_else(|| {
            (
                StatusCode::BAD_REQUEST,
                Json(serde_json::json!({"success": false, "message": "file_uuid required"})),
            )
        })?;

    let redis = crate::core::db::RedisClient::new().ok().map(Arc::new);
    match run_identity_agent(&state.db, file_uuid, redis).await {
        Ok(()) => Ok(Json(serde_json::json!({
            "success": true,
            "message": format!("Identity agent completed for {}", file_uuid),
        }))),
        Err(e) => Ok(Json(serde_json::json!({
            "success": false,
            "message": format!("Identity agent failed: {}", e),
        }))),
    }
}

#[derive(Debug, Deserialize)]
struct ConfirmIdentityRequest {
    file_uuid: String,
    trace_id: i32,
    identity_id: i32,
    identity_uuid: String,
    name: String,
    propagate: Option<bool>,
}

#[derive(Debug, Serialize)]
struct ConfirmIdentityResponse {
    success: bool,
    file_uuid: String,
    trace_id: i32,
    identity_uuid: String,
    name: String,
    steps: serde_json::Value,
    propagation: Option<serde_json::Value>,
}

async fn confirm_identity_handler(
    State(_state): State<AppState>,
    Json(req): Json<ConfirmIdentityRequest>,
) -> Result<Json<ConfirmIdentityResponse>, (StatusCode, Json<serde_json::Value>)> {
    use crate::core::processor::executor::PythonExecutor;

    let executor = PythonExecutor::new().map_err(|e| {
        (
            StatusCode::INTERNAL_SERVER_ERROR,
            Json(serde_json::json!({"success": false, "message": format!("PythonExecutor error: {}", e)})),
        )
    })?;

    let scripts_dir = executor.script_dir();
    let python_path = executor.python_path();
    let script_path = scripts_dir.join("confirm_identity.py");

    let qdrant_url =
        std::env::var("QDRANT_URL").unwrap_or_else(|_| "http://localhost:6333".to_string());
    let qdrant_api_key =
        std::env::var("QDRANT_API_KEY").unwrap_or_else(|_| "Test3200Test3200Test3200".to_string());
    let db_url = std::env::var("DATABASE_URL")
        .unwrap_or_else(|_| "postgresql://accusys@localhost:5432/momentry".to_string());
    let db_schema = std::env::var("DATABASE_SCHEMA").unwrap_or_else(|_| "dev".to_string());

    let propagate = req.propagate.unwrap_or(true);

    let mut cmd = tokio::process::Command::new(python_path);
    cmd.env("DATABASE_URL", &db_url);
    cmd.env("DATABASE_SCHEMA", &db_schema);
    cmd.env("MOMENTRY_DB_SCHEMA", &db_schema);
    cmd.env("QDRANT_URL", &qdrant_url);
    cmd.env("QDRANT_API_KEY", &qdrant_api_key);
    cmd.arg(&script_path);
    cmd.arg("--file-uuid").arg(&req.file_uuid);
    cmd.arg("--trace-id").arg(req.trace_id.to_string());
    cmd.arg("--identity-id").arg(req.identity_id.to_string());
    cmd.arg("--identity-uuid").arg(&req.identity_uuid);
    cmd.arg("--name").arg(&req.name);

    if !propagate {
        cmd.arg("--no-propagate");
    }

    cmd.stdout(std::process::Stdio::piped());
    cmd.stderr(std::process::Stdio::piped());

    tracing::info!(
        "[ConfirmIdentity] Starting for {} trace {} -> {} ({})",
        req.file_uuid,
        req.trace_id,
        req.identity_uuid,
        req.name
    );

    let output = cmd.output().await.map_err(|e| {
        (
            StatusCode::INTERNAL_SERVER_ERROR,
            Json(
                serde_json::json!({"success": false, "message": format!("Command failed: {}", e)}),
            ),
        )
    })?;

    let stdout = String::from_utf8_lossy(&output.stdout);
    let stderr = String::from_utf8_lossy(&output.stderr);

    if !output.status.success() {
        tracing::error!(
            "[ConfirmIdentity] Script failed with exit code: {:?}",
            output.status.code()
        );
        tracing::error!("[ConfirmIdentity] stderr: {}", stderr);
        tracing::error!("[ConfirmIdentity] stdout: {}", stdout);
        return Err((
            StatusCode::INTERNAL_SERVER_ERROR,
            Json(serde_json::json!({
                "success": false,
                "message": format!("Script failed: {}", stderr),
                "stdout": stdout.to_string(),
            })),
        ));
    }

    tracing::info!("[ConfirmIdentity] stdout: {}", stdout);

    let json_start = stdout.find('{');
    if json_start.is_none() {
        return Err((
            StatusCode::INTERNAL_SERVER_ERROR,
            Json(serde_json::json!({
                "success": false,
                "message": "No JSON output found",
                "stdout": stdout.to_string(),
            })),
        ));
    }
    let json_str = &stdout[json_start.unwrap()..];

    let result: serde_json::Value = serde_json::from_str(json_str).map_err(|e| {
        (
            StatusCode::INTERNAL_SERVER_ERROR,
            Json(serde_json::json!({
                "success": false,
                "message": format!("Failed to parse output: {}", e),
                "stdout": stdout.to_string(),
                "json_str": json_str.to_string(),
            })),
        )
    })?;

    Ok(Json(ConfirmIdentityResponse {
        success: result.get("status").and_then(|v| v.as_str()) == Some("success"),
        file_uuid: req.file_uuid,
        trace_id: req.trace_id,
        identity_uuid: req.identity_uuid,
        name: req.name,
        steps: result
            .get("steps")
            .cloned()
            .unwrap_or(serde_json::json!({})),
        propagation: result.get("propagation").cloned(),
    }))
}

/// Read all TMDb identities with profile photos, extract face embeddings, store in Qdrant as seeds.
pub async fn generate_seed_embeddings(db: &PostgresDb) -> anyhow::Result<usize> {
    tracing::warn!(
        "[GenerateSeeds] Seed embedding generation disabled - FaceEmbeddingDb removed. \
         TODO: Reimplement with _faces collection"
    );
    Ok(0)
}