use anyhow::Result;
use axum::Router;
use axum::http::HeaderValue;
use std::sync::Arc;
use tower_http::{
    cors::{Any, CorsLayer},
    trace::TraceLayer,
};

use adapters_auth::{BcryptPasswordHasher, JwtTokenIssuer};

use adapters_postgres::{
    PostgresAlbumRepository, PostgresAssetMetadataRepository, PostgresAssetRepository,
    PostgresDuplicateRepository, PostgresIngestSessionRepository, PostgresJobBatchRepository,
    PostgresJobRepository, PostgresLibraryPathRepository, PostgresPipelineRepository,
    PostgresPluginRepository, PostgresQuotaRepository, PostgresShareRepository,
    PostgresSidecarRepository, PostgresStorageVolumeRepository, PostgresTagRepository,
    PostgresUsageLedgerRepository, PostgresUserRepository, PostgresVisibilityFilterRepository,
    connect, run_migrations,
};

use adapters_storage::LocalFileStorage;

use application::{
    catalog::{
        GetAssetHandler, GetTimelineHandler, ReadAssetFileHandler, RegisterAssetHandler,
        UpdateMetadataHandler,
    },
    identity::{GetProfileHandler, LoginUserHandler, RegisterUserHandler},
    organization::{
        CreateAlbumHandler, GetAlbumHandler, ManageAlbumEntriesHandler, TagAssetHandler,
    },
    processing::{
        CompleteJobHandler, ConfigurePipelineHandler, EnqueueJobHandler, FailJobHandler,
        ManagePluginHandler, ReportBatchProgressHandler, StartJobHandler,
    },
    sharing::{
        AccessSharedResourceHandler, GenerateShareLinkHandler, RevokeShareHandler,
        ShareResourceHandler,
    },
    sidecar::{
        DetectExternalChangesHandler, ExportSidecarHandler, FullExportHandler, FullImportHandler,
        ImportSidecarHandler, ResolveConflictHandler,
    },
    storage::{
        CheckQuotaHandler, IngestAssetHandler, RegisterLibraryPathHandler, RegisterVolumeHandler,
    },
};
use presentation::{
    routes::app_router,
    state::{
        AppState, CatalogHandlers, IdentityHandlers, OrganizationHandlers, ProcessingHandlers,
        SharingHandlers, SidecarHandlers, StorageHandlers,
    },
};

use crate::config::Config;
use crate::log_event_publisher::LogEventPublisher;
use crate::log_sidecar_writer::LogSidecarWriter;

pub async fn build_app(config: &Config) -> Result<Router> {
    let pool = connect(&config.database_url).await?;
    run_migrations(&pool).await?;

    // Identity
    let user_repo = Arc::new(PostgresUserRepository::new(pool.clone()));
    let hasher = Arc::new(BcryptPasswordHasher);
    let issuer = Arc::new(JwtTokenIssuer::new(&config.jwt_secret));

    let register_handler = Arc::new(RegisterUserHandler::new(user_repo.clone(), hasher.clone()));
    let login_handler = Arc::new(LoginUserHandler::new(
        user_repo.clone(),
        hasher,
        issuer.clone(),
    ));
    let get_profile_handler = Arc::new(GetProfileHandler::new(user_repo));

    // Repos
    let album_repo = Arc::new(PostgresAlbumRepository::new(pool.clone()));
    let asset_repo = Arc::new(PostgresAssetRepository::new(pool.clone()));
    let metadata_repo = Arc::new(PostgresAssetMetadataRepository::new(pool.clone()));
    let volume_repo = Arc::new(PostgresStorageVolumeRepository::new(pool.clone()));
    let path_repo = Arc::new(PostgresLibraryPathRepository::new(pool.clone()));
    let session_repo = Arc::new(PostgresIngestSessionRepository::new(pool.clone()));
    let quota_repo = Arc::new(PostgresQuotaRepository::new(pool.clone()));
    let ledger_repo = Arc::new(PostgresUsageLedgerRepository::new(pool.clone()));
    let tag_repo = Arc::new(PostgresTagRepository::new(pool.clone()));
    let duplicate_repo = Arc::new(PostgresDuplicateRepository::new(pool.clone()));
    let sidecar_repo = Arc::new(PostgresSidecarRepository::new(pool.clone()));
    let job_repo = Arc::new(PostgresJobRepository::new(pool.clone()));
    let batch_repo = Arc::new(PostgresJobBatchRepository::new(pool.clone()));
    let plugin_repo = Arc::new(PostgresPluginRepository::new(pool.clone()));
    let pipeline_repo = Arc::new(PostgresPipelineRepository::new(pool.clone()));
    let event_publisher: Arc<LogEventPublisher> = Arc::new(LogEventPublisher);
    let sidecar_writer: Arc<LogSidecarWriter> = Arc::new(LogSidecarWriter);

    // File storage
    let storage_path = std::env::var("STORAGE_PATH").unwrap_or_else(|_| "./data/media".to_string());
    let file_storage: Arc<LocalFileStorage> = Arc::new(LocalFileStorage::new(&storage_path));

    // Album handlers
    let create_album_handler = Arc::new(CreateAlbumHandler::new(album_repo.clone()));
    let get_album_handler = Arc::new(GetAlbumHandler::new(album_repo.clone()));
    let manage_album_entries_handler = Arc::new(ManageAlbumEntriesHandler::new(album_repo));

    // Asset handlers
    let ingest_asset_handler = Arc::new(IngestAssetHandler::new(
        session_repo,
        path_repo.clone(),
        quota_repo.clone(),
        ledger_repo.clone(),
        asset_repo.clone(),
        file_storage.clone(),
        event_publisher.clone(),
    ));
    let get_asset_handler = Arc::new(GetAssetHandler::new(
        asset_repo.clone(),
        metadata_repo.clone(),
    ));
    let get_timeline_handler = Arc::new(GetTimelineHandler::new(
        asset_repo.clone(),
        metadata_repo.clone(),
    ));
    let update_metadata_handler = Arc::new(UpdateMetadataHandler::new(
        asset_repo.clone(),
        metadata_repo.clone(),
        event_publisher.clone(),
    ));
    let read_asset_file_handler =
        Arc::new(ReadAssetFileHandler::new(asset_repo.clone(), file_storage));

    // Register asset handler
    let register_asset_handler = Arc::new(RegisterAssetHandler::new(
        asset_repo.clone(),
        duplicate_repo,
        event_publisher.clone(),
    ));

    // Tag handler
    let tag_asset_handler = Arc::new(TagAssetHandler::new(asset_repo.clone(), tag_repo));

    // Check quota handler
    let check_quota_handler = Arc::new(CheckQuotaHandler::new(quota_repo, ledger_repo));

    // Sidecar handlers
    let export_sidecar_handler = Arc::new(ExportSidecarHandler::new(
        metadata_repo.clone(),
        sidecar_repo.clone(),
        sidecar_writer.clone(),
    ));
    let detect_changes_handler = Arc::new(DetectExternalChangesHandler::new(
        sidecar_repo.clone(),
        sidecar_writer.clone(),
    ));
    let import_sidecar_handler = Arc::new(ImportSidecarHandler::new(
        sidecar_repo.clone(),
        sidecar_writer.clone(),
        metadata_repo.clone(),
    ));
    let resolve_conflict_handler = Arc::new(ResolveConflictHandler::new(
        sidecar_repo.clone(),
        sidecar_writer.clone(),
        metadata_repo.clone(),
    ));
    let full_export_handler = Arc::new(FullExportHandler::new(
        asset_repo.clone(),
        metadata_repo.clone(),
        sidecar_repo.clone(),
        sidecar_writer.clone(),
    ));
    let full_import_handler = Arc::new(FullImportHandler::new(
        asset_repo,
        metadata_repo,
        sidecar_repo,
        sidecar_writer,
    ));

    // Processing handlers
    let enqueue_job_handler = Arc::new(EnqueueJobHandler::new(
        job_repo.clone(),
        event_publisher.clone(),
    ));
    let start_job_handler = Arc::new(StartJobHandler::new(job_repo.clone()));
    let complete_job_handler = Arc::new(CompleteJobHandler::new(
        job_repo.clone(),
        batch_repo.clone(),
        event_publisher.clone(),
    ));
    let fail_job_handler = Arc::new(FailJobHandler::new(
        job_repo.clone(),
        batch_repo.clone(),
        event_publisher.clone(),
    ));
    let batch_progress_handler = Arc::new(ReportBatchProgressHandler::new(batch_repo, job_repo));
    let manage_plugin_handler = Arc::new(ManagePluginHandler::new(plugin_repo.clone()));
    let configure_pipeline_handler =
        Arc::new(ConfigurePipelineHandler::new(pipeline_repo, plugin_repo));

    // Sharing repos & handlers
    let share_repo = Arc::new(PostgresShareRepository::new(pool.clone()));
    let _visibility_filter_repo = Arc::new(PostgresVisibilityFilterRepository::new(pool));

    let share_resource_handler = Arc::new(ShareResourceHandler::new(
        share_repo.clone(),
        event_publisher.clone(),
    ));
    let generate_link_handler = Arc::new(GenerateShareLinkHandler::new(share_repo.clone()));
    let revoke_handler = Arc::new(RevokeShareHandler::new(share_repo.clone(), event_publisher));
    let access_handler = Arc::new(AccessSharedResourceHandler::new(share_repo));

    // Storage handlers
    let register_volume_handler = Arc::new(RegisterVolumeHandler::new(volume_repo.clone()));
    let register_library_path_handler =
        Arc::new(RegisterLibraryPathHandler::new(volume_repo, path_repo));

    let identity = IdentityHandlers {
        register: register_handler,
        login: login_handler,
        get_profile: get_profile_handler,
    };

    let catalog = CatalogHandlers {
        ingest_asset: ingest_asset_handler,
        get_asset: get_asset_handler,
        get_timeline: get_timeline_handler,
        update_metadata: update_metadata_handler,
        read_asset_file: read_asset_file_handler,
        register_asset: register_asset_handler,
    };

    let organization = OrganizationHandlers {
        create_album: create_album_handler,
        get_album: get_album_handler,
        manage_album_entries: manage_album_entries_handler,
        tag_asset: tag_asset_handler,
    };

    let storage_handlers = StorageHandlers {
        register_volume: register_volume_handler,
        register_library_path: register_library_path_handler,
        check_quota: check_quota_handler,
    };

    let sidecar = SidecarHandlers {
        export: export_sidecar_handler,
        detect_changes: detect_changes_handler,
        import: import_sidecar_handler,
        resolve: resolve_conflict_handler,
        full_export: full_export_handler,
        full_import: full_import_handler,
    };

    let processing = ProcessingHandlers {
        enqueue_job: enqueue_job_handler,
        start_job: start_job_handler,
        complete_job: complete_job_handler,
        fail_job: fail_job_handler,
        batch_progress: batch_progress_handler,
        manage_plugin: manage_plugin_handler,
        configure_pipeline: configure_pipeline_handler,
    };

    let sharing = SharingHandlers {
        share_resource: share_resource_handler,
        generate_link: generate_link_handler,
        revoke: revoke_handler,
        access: access_handler,
    };

    let state = AppState {
        identity,
        catalog,
        organization,
        storage: storage_handlers,
        sharing,
        sidecar,
        processing,
        token_issuer: issuer,
    };

    let cors = CorsLayer::new()
        .allow_origin(
            config
                .cors_allowed_origins
                .iter()
                .filter_map(|o| o.parse::<HeaderValue>().ok())
                .collect::<Vec<_>>(),
        )
        .allow_methods(Any)
        .allow_headers(Any);

    Ok(app_router()
        .with_state(state)
        .layer(TraceLayer::new_for_http())
        .layer(cors))
}