use std::sync::Arc;

use crate::db::DatabasePool;
use domain::{ActivityLogRepository, ChannelRepository, IAppSettingsRepository, ILibraryRepository, ProviderConfigRepository, ScheduleRepository, TranscodeSettingsRepository, UserRepository};

#[derive(Debug, thiserror::Error)]
pub enum FactoryError {
    #[error("Database error: {0}")]
    Database(#[from] sqlx::Error),
    #[error("Not implemented: {0}")]
    NotImplemented(String),
    #[error("Infrastructure error: {0}")]
    Infrastructure(#[from] domain::DomainError),
}

pub type FactoryResult<T> = Result<T, FactoryError>;

pub async fn build_user_repository(pool: &DatabasePool) -> FactoryResult<Arc<dyn UserRepository>> {
    match pool {
        #[cfg(feature = "sqlite")]
        DatabasePool::Sqlite(pool) => Ok(Arc::new(
            crate::user_repository::SqliteUserRepository::new(pool.clone()),
        )),
        #[cfg(feature = "postgres")]
        DatabasePool::Postgres(pool) => Ok(Arc::new(
            crate::user_repository::PostgresUserRepository::new(pool.clone()),
        )),
        #[allow(unreachable_patterns)]
        _ => Err(FactoryError::NotImplemented(
            "No database feature enabled".to_string(),
        )),
    }
}

pub async fn build_channel_repository(
    pool: &DatabasePool,
) -> FactoryResult<Arc<dyn ChannelRepository>> {
    match pool {
        #[cfg(feature = "sqlite")]
        DatabasePool::Sqlite(pool) => Ok(Arc::new(
            crate::channel_repository::SqliteChannelRepository::new(pool.clone()),
        )),
        #[cfg(feature = "postgres")]
        DatabasePool::Postgres(pool) => Ok(Arc::new(
            crate::channel_repository::PostgresChannelRepository::new(pool.clone()),
        )),
        #[allow(unreachable_patterns)]
        _ => Err(FactoryError::NotImplemented(
            "No database feature enabled".to_string(),
        )),
    }
}

pub async fn build_activity_log_repository(
    pool: &DatabasePool,
) -> FactoryResult<Arc<dyn ActivityLogRepository>> {
    match pool {
        #[cfg(feature = "sqlite")]
        DatabasePool::Sqlite(pool) => Ok(Arc::new(
            crate::activity_log_repository::SqliteActivityLogRepository::new(pool.clone()),
        )),
        #[cfg(feature = "postgres")]
        DatabasePool::Postgres(_pool) => Err(FactoryError::NotImplemented(
            "ActivityLogRepository not yet implemented for Postgres".to_string(),
        )),
        #[allow(unreachable_patterns)]
        _ => Err(FactoryError::NotImplemented(
            "No database feature enabled".to_string(),
        )),
    }
}

pub async fn build_provider_config_repository(
    pool: &DatabasePool,
) -> FactoryResult<Arc<dyn ProviderConfigRepository>> {
    match pool {
        #[cfg(feature = "sqlite")]
        DatabasePool::Sqlite(pool) => Ok(Arc::new(
            crate::provider_config_repository::SqliteProviderConfigRepository::new(pool.clone()),
        )),
        #[allow(unreachable_patterns)]
        _ => Err(FactoryError::NotImplemented(
            "ProviderConfigRepository not implemented for this database".to_string(),
        )),
    }
}

pub async fn build_schedule_repository(
    pool: &DatabasePool,
) -> FactoryResult<Arc<dyn ScheduleRepository>> {
    match pool {
        #[cfg(feature = "sqlite")]
        DatabasePool::Sqlite(pool) => Ok(Arc::new(
            crate::schedule_repository::SqliteScheduleRepository::new(pool.clone()),
        )),
        #[cfg(feature = "postgres")]
        DatabasePool::Postgres(pool) => Ok(Arc::new(
            crate::schedule_repository::PostgresScheduleRepository::new(pool.clone()),
        )),
        #[allow(unreachable_patterns)]
        _ => Err(FactoryError::NotImplemented(
            "No database feature enabled".to_string(),
        )),
    }
}

pub async fn build_transcode_settings_repository(
    pool: &DatabasePool,
) -> FactoryResult<Arc<dyn TranscodeSettingsRepository>> {
    match pool {
        #[cfg(feature = "sqlite")]
        DatabasePool::Sqlite(p) => Ok(Arc::new(
            crate::transcode_settings_repository::SqliteTranscodeSettingsRepository::new(p.clone()),
        )),
        #[allow(unreachable_patterns)]
        _ => Err(FactoryError::NotImplemented(
            "TranscodeSettingsRepository not implemented for this database".to_string(),
        )),
    }
}

pub async fn build_library_repository(
    pool: &DatabasePool,
) -> FactoryResult<Arc<dyn ILibraryRepository>> {
    match pool {
        #[cfg(feature = "sqlite")]
        DatabasePool::Sqlite(pool) => Ok(Arc::new(
            crate::library_repository::SqliteLibraryRepository::new(pool.clone()),
        )),
        #[allow(unreachable_patterns)]
        _ => Err(FactoryError::NotImplemented(
            "LibraryRepository not implemented for this database".to_string(),
        )),
    }
}

pub async fn build_app_settings_repository(
    pool: &DatabasePool,
) -> FactoryResult<Arc<dyn IAppSettingsRepository>> {
    match pool {
        #[cfg(feature = "sqlite")]
        DatabasePool::Sqlite(pool) => Ok(Arc::new(
            crate::app_settings_repository::SqliteAppSettingsRepository::new(pool.clone()),
        )),
        #[allow(unreachable_patterns)]
        _ => Err(FactoryError::NotImplemented(
            "AppSettingsRepository not implemented for this database".to_string(),
        )),
    }
}

#[cfg(feature = "local-files")]
pub struct LocalFilesBundle {
    pub provider: Arc<crate::LocalFilesProvider>,
    pub local_index: Arc<crate::LocalIndex>,
    pub transcode_manager: Option<Arc<crate::TranscodeManager>>,
}

#[cfg(feature = "local-files")]
pub async fn build_local_files_bundle(
    pool: &DatabasePool,
    root_dir: std::path::PathBuf,
    transcode_dir: Option<std::path::PathBuf>,
    cleanup_ttl_hours: u32,
    base_url: String,
    provider_id: &str,
) -> FactoryResult<LocalFilesBundle> {
    match pool {
        #[cfg(feature = "sqlite")]
        DatabasePool::Sqlite(sqlite_pool) => {
            let cfg = crate::LocalFilesConfig {
                root_dir,
                base_url,
                transcode_dir: transcode_dir.clone(),
                cleanup_ttl_hours,
            };
            let idx = Arc::new(crate::LocalIndex::new(&cfg, sqlite_pool.clone(), provider_id.to_string()).await);
            let tm = transcode_dir.as_ref().map(|td| {
                std::fs::create_dir_all(td).ok();
                crate::TranscodeManager::new(td.clone(), cleanup_ttl_hours)
            });
            let provider = Arc::new(crate::LocalFilesProvider::new(Arc::clone(&idx), cfg, tm.clone()));
            Ok(LocalFilesBundle { provider, local_index: idx, transcode_manager: tm })
        }
        #[allow(unreachable_patterns)]
        _ => Err(FactoryError::NotImplemented(
            "local-files requires SQLite".to_string(),
        )),
    }
}