import lurid from 'jsr:@andyburke/lurid';
import { get_session, get_user, PRECHECK_TABLE, require_user } from '../../../../../utils/prechecks.ts';
import { ROOM, ROOMS } from '../../../../../models/room.ts';
import * as CANNED_RESPONSES from '../../../../../utils/canned_responses.ts';
import { EVENT, EVENTS } from '../../../../../models/event.ts';
import parse_body from '../../../../../utils/bodyparser.ts';

export const PRECHECKS: PRECHECK_TABLE = {};

// GET /api/rooms/:room_id/events - get room events
// query parameters:
//   partial_id: the partial id subset you would like to match (remember, lurids are lexigraphically sorted)
PRECHECKS.GET = [get_session, get_user, require_user, async (_req: Request, meta: Record<string, any>): Promise<Response | undefined> => {
	const room_id: string = meta.params?.room_id?.toLowerCase().trim() ?? '';

	// lurid is 49 chars as we use them, eg: "also-play-flow-want-form-wide-thus-work-burn-same"
	const room: ROOM | null = room_id.length === 49 ? await ROOMS.get(room_id) : null;

	if (!room) {
		return CANNED_RESPONSES.not_found();
	}

	meta.room = room;
	const room_is_public: boolean = meta.room.permissions.read.length === 0;
	const user_has_read_for_room = room_is_public || meta.room.permissions.read.includes(meta.user.id);
	const room_events_are_public = meta.room.permissions.read_events.length === 0;
	const user_has_read_events_for_room = user_has_read_for_room &&
		(room_events_are_public || meta.room.permissions.read_events.includes(meta.user.id));

	if (!user_has_read_events_for_room) {
		return CANNED_RESPONSES.permission_denied();
	}
}];
export async function GET(_req: Request, meta: Record<string, any>): Promise<Response> {
	const query: URLSearchParams = meta.query;
	const partial_id: string | undefined = query.get('partial_id')?.toLowerCase().trim();

	const has_partial_id = typeof partial_id === 'string' && partial_id.length >= 2;
	if (!has_partial_id) {
		return Response.json({
			error: {
				message: 'You must specify a `partial_id` query parameter.',
				cause: 'missing_query_parameter'
			}
		}, {
			status: 400
		});
	}

	const limit = Math.min(parseInt(query.get('limit') ?? '10'), 100);
	const events = await EVENTS.all({
		id_after: partial_id,
		limit
	});

	return Response.json(events, {
		status: 200
	});
}

// POST /api/rooms/:room_id/events - Create an event
PRECHECKS.POST = [get_session, get_user, require_user, async (_req: Request, meta: Record<string, any>): Promise<Response | undefined> => {
	const room_id: string = meta.params?.room_id?.toLowerCase().trim() ?? '';

	// lurid is 49 chars as we use them, eg: "also-play-flow-want-form-wide-thus-work-burn-same"
	const room: ROOM | null = room_id.length === 49 ? await ROOMS.get(room_id) : null;

	if (!room) {
		return CANNED_RESPONSES.not_found();
	}

	meta.room = room;
	const room_is_public: boolean = meta.room.permissions.read.length === 0;
	const user_has_read_for_room = room_is_public || meta.room.permissions.read.includes(meta.user.id);
	const room_events_are_publicly_writable = meta.room.permissions.write_events.length === 0;
	const user_has_write_events_for_room = user_has_read_for_room &&
		(room_events_are_publicly_writable || meta.room.permissions.write_events.includes(meta.user.id));

	if (!user_has_write_events_for_room) {
		return CANNED_RESPONSES.permission_denied();
	}
}];
export async function POST(req: Request, meta: Record<string, any>): Promise<Response> {
	try {
		const now = new Date().toISOString();
		const body = await parse_body(req);
		const new_event: EVENT = {
			type: 'unknown',
			...body,
			id: `${meta.params.room_id}:${lurid()}`,
			creator_id: meta.user.id,
			timestamps: {
				created: now,
				updated: now
			}
		};

		await EVENTS.create(new_event);

		return Response.json(new_event, {
			status: 201
		});
	} catch (error) {
		return Response.json({
			error: {
				message: (error as Error).message ?? 'Unknown Error!',
				cause: (error as Error).cause ?? 'unknown'
			}
		}, { status: 500 });
	}
}