mod args;
mod auth;
mod handler;
mod request;
mod response;
pub mod state;

use std::str::FromStr;

use axum::{
	response::{IntoResponse, Redirect},
	routing::{any, get, post},
	Router,
};
use conduit::{err, Server};
use http::{uri, Uri};

use self::handler::RouterExt;
pub(super) use self::{args::Args as Ruma, response::RumaResponse, state::State};
use crate::{client, server};

pub fn build(router: Router<State>, server: &Server) -> Router<State> {
	let config = &server.config;
	let mut router = router
        .ruma_route(client::appservice_ping)
		.ruma_route(client::get_supported_versions_route)
		.ruma_route(client::get_register_available_route)
		.ruma_route(client::register_route)
		.ruma_route(client::get_login_types_route)
		.ruma_route(client::login_route)
		.ruma_route(client::whoami_route)
		.ruma_route(client::logout_route)
		.ruma_route(client::logout_all_route)
		.ruma_route(client::change_password_route)
		.ruma_route(client::deactivate_route)
		.ruma_route(client::third_party_route)
		.ruma_route(client::request_3pid_management_token_via_email_route)
		.ruma_route(client::request_3pid_management_token_via_msisdn_route)
		.ruma_route(client::check_registration_token_validity)
		.ruma_route(client::get_capabilities_route)
		.ruma_route(client::get_pushrules_all_route)
		.ruma_route(client::set_pushrule_route)
		.ruma_route(client::get_pushrule_route)
		.ruma_route(client::set_pushrule_enabled_route)
		.ruma_route(client::get_pushrule_enabled_route)
		.ruma_route(client::get_pushrule_actions_route)
		.ruma_route(client::set_pushrule_actions_route)
		.ruma_route(client::delete_pushrule_route)
		.ruma_route(client::get_room_event_route)
		.ruma_route(client::get_room_aliases_route)
		.ruma_route(client::get_filter_route)
		.ruma_route(client::create_filter_route)
		.ruma_route(client::create_openid_token_route)
		.ruma_route(client::set_global_account_data_route)
		.ruma_route(client::set_room_account_data_route)
		.ruma_route(client::get_global_account_data_route)
		.ruma_route(client::get_room_account_data_route)
		.ruma_route(client::set_displayname_route)
		.ruma_route(client::get_displayname_route)
		.ruma_route(client::set_avatar_url_route)
		.ruma_route(client::get_avatar_url_route)
		.ruma_route(client::get_profile_route)
		.ruma_route(client::set_presence_route)
		.ruma_route(client::get_presence_route)
		.ruma_route(client::upload_keys_route)
		.ruma_route(client::get_keys_route)
		.ruma_route(client::claim_keys_route)
		.ruma_route(client::create_backup_version_route)
		.ruma_route(client::update_backup_version_route)
		.ruma_route(client::delete_backup_version_route)
		.ruma_route(client::get_latest_backup_info_route)
		.ruma_route(client::get_backup_info_route)
		.ruma_route(client::add_backup_keys_route)
		.ruma_route(client::add_backup_keys_for_room_route)
		.ruma_route(client::add_backup_keys_for_session_route)
		.ruma_route(client::delete_backup_keys_for_room_route)
		.ruma_route(client::delete_backup_keys_for_session_route)
		.ruma_route(client::delete_backup_keys_route)
		.ruma_route(client::get_backup_keys_for_room_route)
		.ruma_route(client::get_backup_keys_for_session_route)
		.ruma_route(client::get_backup_keys_route)
		.ruma_route(client::set_read_marker_route)
		.ruma_route(client::create_receipt_route)
		.ruma_route(client::create_typing_event_route)
		.ruma_route(client::create_room_route)
		.ruma_route(client::redact_event_route)
		.ruma_route(client::report_event_route)
		.ruma_route(client::create_alias_route)
		.ruma_route(client::delete_alias_route)
		.ruma_route(client::get_alias_route)
		.ruma_route(client::join_room_by_id_route)
		.ruma_route(client::join_room_by_id_or_alias_route)
		.ruma_route(client::joined_members_route)
		.ruma_route(client::leave_room_route)
		.ruma_route(client::forget_room_route)
		.ruma_route(client::joined_rooms_route)
		.ruma_route(client::kick_user_route)
		.ruma_route(client::ban_user_route)
		.ruma_route(client::unban_user_route)
		.ruma_route(client::invite_user_route)
		.ruma_route(client::set_room_visibility_route)
		.ruma_route(client::get_room_visibility_route)
		.ruma_route(client::get_public_rooms_route)
		.ruma_route(client::get_public_rooms_filtered_route)
		.ruma_route(client::search_users_route)
		.ruma_route(client::get_member_events_route)
		.ruma_route(client::get_protocols_route)
		.route("/_matrix/client/unstable/thirdparty/protocols",
			get(client::get_protocols_route_unstable))
		.ruma_route(client::send_message_event_route)
		.ruma_route(client::send_state_event_for_key_route)
		.ruma_route(client::get_state_events_route)
		.ruma_route(client::get_state_events_for_key_route)
		// Ruma doesn't have support for multiple paths for a single endpoint yet, and these routes
		// share one Ruma request / response type pair with {get,send}_state_event_for_key_route
		.route(
			"/_matrix/client/r0/rooms/:room_id/state/:event_type",
			get(client::get_state_events_for_empty_key_route)
				.put(client::send_state_event_for_empty_key_route),
		)
		.route(
			"/_matrix/client/v3/rooms/:room_id/state/:event_type",
			get(client::get_state_events_for_empty_key_route)
				.put(client::send_state_event_for_empty_key_route),
		)
		// These two endpoints allow trailing slashes
		.route(
			"/_matrix/client/r0/rooms/:room_id/state/:event_type/",
			get(client::get_state_events_for_empty_key_route)
				.put(client::send_state_event_for_empty_key_route),
		)
		.route(
			"/_matrix/client/v3/rooms/:room_id/state/:event_type/",
			get(client::get_state_events_for_empty_key_route)
				.put(client::send_state_event_for_empty_key_route),
		)
		.ruma_route(client::sync_events_route)
		.ruma_route(client::sync_events_v4_route)
		.ruma_route(client::get_context_route)
		.ruma_route(client::get_message_events_route)
		.ruma_route(client::search_events_route)
		.ruma_route(client::turn_server_route)
		.ruma_route(client::send_event_to_device_route)
		.ruma_route(client::create_content_route)
		.ruma_route(client::get_content_thumbnail_route)
		.ruma_route(client::get_content_route)
		.ruma_route(client::get_content_as_filename_route)
		.ruma_route(client::get_media_preview_route)
		.ruma_route(client::get_media_config_route)
		.ruma_route(client::get_devices_route)
		.ruma_route(client::get_device_route)
		.ruma_route(client::update_device_route)
		.ruma_route(client::delete_device_route)
		.ruma_route(client::delete_devices_route)
		.ruma_route(client::get_tags_route)
		.ruma_route(client::update_tag_route)
		.ruma_route(client::delete_tag_route)
		.ruma_route(client::upload_signing_keys_route)
		.ruma_route(client::upload_signatures_route)
		.ruma_route(client::get_key_changes_route)
		.ruma_route(client::get_pushers_route)
		.ruma_route(client::set_pushers_route)
		.ruma_route(client::upgrade_room_route)
		.ruma_route(client::get_threads_route)
		.ruma_route(client::get_relating_events_with_rel_type_and_event_type_route)
		.ruma_route(client::get_relating_events_with_rel_type_route)
		.ruma_route(client::get_relating_events_route)
		.ruma_route(client::get_hierarchy_route)
		.ruma_route(client::get_mutual_rooms_route)
		.ruma_route(client::get_room_summary)
		.route(
			"/_matrix/client/unstable/im.nheko.summary/rooms/:room_id_or_alias/summary",
			get(client::get_room_summary_legacy)
		)
		.ruma_route(client::well_known_support)
		.ruma_route(client::well_known_client)
		.route("/_conduwuit/server_version", get(client::conduwuit_server_version))
		.route("/_matrix/client/r0/rooms/:room_id/initialSync", get(initial_sync))
		.route("/_matrix/client/v3/rooms/:room_id/initialSync", get(initial_sync))
		.route("/client/server.json", get(client::syncv3_client_server_json));

	if config.allow_federation {
		router = router
			.ruma_route(server::get_server_version_route)
			.route("/_matrix/key/v2/server", get(server::get_server_keys_route))
			.route("/_matrix/key/v2/server/:key_id", get(server::get_server_keys_deprecated_route))
			.ruma_route(server::get_public_rooms_route)
			.ruma_route(server::get_public_rooms_filtered_route)
			.ruma_route(server::send_transaction_message_route)
			.ruma_route(server::get_event_route)
			.ruma_route(server::get_backfill_route)
			.ruma_route(server::get_missing_events_route)
			.ruma_route(server::get_event_authorization_route)
			.ruma_route(server::get_room_state_route)
			.ruma_route(server::get_room_state_ids_route)
			.ruma_route(server::create_leave_event_template_route)
			.ruma_route(server::create_leave_event_v1_route)
			.ruma_route(server::create_leave_event_v2_route)
			.ruma_route(server::create_join_event_template_route)
			.ruma_route(server::create_join_event_v1_route)
			.ruma_route(server::create_join_event_v2_route)
			.ruma_route(server::create_invite_route)
			.ruma_route(server::get_devices_route)
			.ruma_route(server::get_room_information_route)
			.ruma_route(server::get_profile_information_route)
			.ruma_route(server::get_keys_route)
			.ruma_route(server::claim_keys_route)
			.ruma_route(server::get_openid_userinfo_route)
			.ruma_route(server::get_hierarchy_route)
			.ruma_route(server::well_known_server)
			.ruma_route(server::get_content_route)
			.ruma_route(server::get_content_thumbnail_route)
			.route("/_conduwuit/local_user_count", get(client::conduwuit_local_user_count));
	} else {
		router = router
			.route("/_matrix/federation/*path", any(federation_disabled))
			.route("/.well-known/matrix/server", any(federation_disabled))
			.route("/_matrix/key/*path", any(federation_disabled))
			.route("/_conduwuit/local_user_count", any(federation_disabled));
	}

	if config.allow_legacy_media {
		router = router
			.ruma_route(client::get_media_config_legacy_route)
			.ruma_route(client::get_media_preview_legacy_route)
			.ruma_route(client::get_content_legacy_route)
			.ruma_route(client::get_content_as_filename_legacy_route)
			.ruma_route(client::get_content_thumbnail_legacy_route)
			.route("/_matrix/media/v1/config", get(client::get_media_config_legacy_legacy_route))
			.route("/_matrix/media/v1/upload", post(client::create_content_legacy_route))
			.route(
				"/_matrix/media/v1/preview_url",
				get(client::get_media_preview_legacy_legacy_route),
			)
			.route(
				"/_matrix/media/v1/download/:server_name/:media_id",
				get(client::get_content_legacy_legacy_route),
			)
			.route(
				"/_matrix/media/v1/download/:server_name/:media_id/:file_name",
				get(client::get_content_as_filename_legacy_legacy_route),
			)
			.route(
				"/_matrix/media/v1/thumbnail/:server_name/:media_id",
				get(client::get_content_thumbnail_legacy_legacy_route),
			);
	} else {
		router = router
			.route("/_matrix/media/v1/*path", any(legacy_media_disabled))
			.route("/_matrix/media/v3/config", any(legacy_media_disabled))
			.route("/_matrix/media/v3/download/*path", any(legacy_media_disabled))
			.route("/_matrix/media/v3/thumbnail/*path", any(legacy_media_disabled))
			.route("/_matrix/media/v3/preview_url", any(redirect_legacy_preview))
			.route("/_matrix/media/r0/config", any(legacy_media_disabled))
			.route("/_matrix/media/r0/download/*path", any(legacy_media_disabled))
			.route("/_matrix/media/r0/thumbnail/*path", any(legacy_media_disabled))
			.route("/_matrix/media/r0/preview_url", any(redirect_legacy_preview));
	}

	router
}

async fn redirect_legacy_preview(uri: Uri) -> impl IntoResponse {
	let path = "/_matrix/client/v1/media/preview_url";
	let query = uri.query().unwrap_or_default();

	let path_and_query = format!("{path}?{query}");
	let path_and_query = uri::PathAndQuery::from_str(&path_and_query)
		.expect("Failed to build PathAndQuery for media preview redirect URI");

	let uri = uri::Builder::new()
		.path_and_query(path_and_query)
		.build()
		.expect("Failed to build URI for redirect")
		.to_string();

	Redirect::temporary(&uri)
}

async fn initial_sync(_uri: Uri) -> impl IntoResponse {
	err!(Request(GuestAccessForbidden("Guest access not implemented")))
}

async fn legacy_media_disabled() -> impl IntoResponse { err!(Request(Forbidden("Unauthenticated media is disabled."))) }

async fn federation_disabled() -> impl IntoResponse { err!(Request(Forbidden("Federation is disabled."))) }