use std::path::{Path, PathBuf};
use std::process::Command;
use anyhow::{anyhow, Result};
use log::{info, error};

pub struct UploadHook {
    enabled: bool,
    video_probe_path: PathBuf,
    video_register_cli: PathBuf,
    video_register_dir: PathBuf,
    video_extensions: Vec<String>,
}

impl UploadHook {
    pub fn new(
        enabled: bool,
        video_probe_path: PathBuf,
        video_register_cli: PathBuf,
        video_register_dir: PathBuf,
        video_extensions: Vec<String>,
    ) -> Self {
        Self {
            enabled,
            video_probe_path,
            video_register_cli,
            video_register_dir,
            video_extensions,
        }
    }

    pub fn trigger(&self, file_path: &Path, user_uuid: &str) -> Result<()> {
        if !self.enabled {
            return Ok(());
        }

        if !self.is_video_file(file_path) {
            info!("UploadHook: Skipping non-video file: {:?}", file_path);
            return Ok(());
        }

        info!("UploadHook: Triggering for file {:?} (user={})", file_path, user_uuid);

        let probe_json = self.run_video_probe(file_path)?;
        let video_uuid = self.run_video_register(&probe_json, user_uuid)?;

        info!("UploadHook: Video registered successfully (UUID={})", video_uuid);
        Ok(())
    }

    fn run_video_probe(&self, file_path: &Path) -> Result<PathBuf> {
        info!("UploadHook: Running video_probe on {:?}", file_path);

        let output = Command::new(&self.video_probe_path)
            .arg(file_path)
            .output()
            .map_err(|e| anyhow!("Failed to execute video_probe: {}", e))?;

        if !output.status.success() {
            let stderr = String::from_utf8_lossy(&output.stderr);
            error!("UploadHook: video_probe failed: {}", stderr);
            return Err(anyhow!("video_probe failed with status {}", output.status));
        }

        let stdout = String::from_utf8_lossy(&output.stdout);
        info!("UploadHook: video_probe output: {}", stdout);

        let probe_json = file_path.with_extension("probe.json");
        Ok(probe_json)
    }

    fn run_video_register(&self, probe_json: &Path, user_uuid: &str) -> Result<String> {
        info!("UploadHook: Running video_register on {:?}", probe_json);

        let output = Command::new("python3")
            .arg(&self.video_register_cli)
            .arg("register")
            .arg(probe_json)
            .current_dir(&self.video_register_dir)
            .env("USER_UUID", user_uuid)
            .output()
            .map_err(|e| anyhow!("Failed to execute video_register: {}", e))?;

        if !output.status.success() {
            let stderr = String::from_utf8_lossy(&output.stderr);
            error!("UploadHook: video_register failed: {}", stderr);
            return Err(anyhow!("video_register failed with status {}", output.status));
        }

        let stdout = String::from_utf8_lossy(&output.stdout);
        info!("UploadHook: video_register output: {}", stdout);

        let uuid = stdout
            .lines()
            .find(|line| line.contains("UUID:") || line.contains("uuid"))
            .and_then(|line| {
                if line.contains("UUID:") {
                    line.split(':').nth(1).map(|s| s.trim().to_string())
                } else {
                    Some(line.trim().to_string())
                }
            })
            .unwrap_or_else(|| "unknown".to_string());

        Ok(uuid)
    }

    fn is_video_file(&self, path: &Path) -> bool {
        path.extension()
            .and_then(|e| e.to_str())
            .map(|ext| self.video_extensions.contains(&ext.to_lowercase()))
            .unwrap_or(false)
    }
}

impl Default for UploadHook {
    fn default() -> Self {
        Self::new(
            false,
            PathBuf::from("/Users/accusys/momentry_core_project/video_probe/target/release/video_probe"),
            PathBuf::from("cli.py"),
            PathBuf::from("/Users/accusys/momentry_core_project/video_register"),
            vec![
                "mp4".to_string(),
                "mov".to_string(),
                "avi".to_string(),
                "mkv".to_string(),
                "webm".to_string(),
                "flv".to_string(),
                "wmv".to_string(),
                "m4v".to_string(),
            ],
        )
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_is_video_file() {
        let hook = UploadHook::default();

        assert!(hook.is_video_file(Path::new("test.mp4")));
        assert!(hook.is_video_file(Path::new("test.MOV")));
        assert!(hook.is_video_file(Path::new("test.avi")));
        assert!(!hook.is_video_file(Path::new("test.txt")));
        assert!(!hook.is_video_file(Path::new("test.jpg")));
    }

    #[test]
    fn test_disabled_hook() {
        let hook = UploadHook::new(
            false,
            PathBuf::from("/tmp/video_probe"),
            PathBuf::from("cli.py"),
            PathBuf::from("/tmp/video_register"),
            vec!["mp4".to_string()],
        );

        let result = hook.trigger(Path::new("/tmp/test.mp4"), "user123");
        assert!(result.is_ok());
    }
}