/**
 * rChats Automerge document schemas.
 *
 * Granularity: one directory doc per space + one doc per channel.
 * DocId format: {space}:chats:channels (directory)
 *              {space}:chats:channel:{channelId} (messages)
 */

import type { DocSchema } from '../../shared/local-first/document';

// ── Document types ──

export interface ChannelInfo {
	id: string;
	name: string;
	description: string;
	isPrivate: boolean;
	createdBy: string | null;
	createdAt: number;
	updatedAt: number;
	visibility?: import('../../shared/membrane').ObjectVisibility;
}

export interface ChatsDirectoryDoc {
	meta: {
		module: string;
		collection: string;
		version: number;
		spaceSlug: string;
		createdAt: number;
	};
	channels: Record<string, ChannelInfo>;
}

export interface Member {
	userId: string;
	displayName: string;
	joinedAt: number;
}

export interface ChatMessage {
	id: string;
	channelId: string;
	authorId: string;
	authorName: string;
	content: string;
	replyTo: string | null;
	editedAt: number | null;
	createdAt: number;
	visibility?: import('../../shared/membrane').ObjectVisibility;
}

export interface ChatChannelDoc {
	meta: {
		module: string;
		collection: string;
		version: number;
		spaceSlug: string;
		createdAt: number;
	};
	channelId: string;
	messages: Record<string, ChatMessage>;
	members: Record<string, Member>;
}

// ── Schema registration ──

export const chatsDirectorySchema: DocSchema<ChatsDirectoryDoc> = {
	module: 'chats',
	collection: 'channels',
	version: 1,
	init: (): ChatsDirectoryDoc => ({
		meta: {
			module: 'chats',
			collection: 'channels',
			version: 1,
			spaceSlug: '',
			createdAt: Date.now(),
		},
		channels: {},
	}),
};

export const chatChannelSchema: DocSchema<ChatChannelDoc> = {
	module: 'chats',
	collection: 'channel',
	version: 1,
	init: (): ChatChannelDoc => ({
		meta: {
			module: 'chats',
			collection: 'channel',
			version: 1,
			spaceSlug: '',
			createdAt: Date.now(),
		},
		channelId: '',
		messages: {},
		members: {},
	}),
};

// ── Helpers ──

export function chatsDirectoryDocId(space: string) {
	return `${space}:chats:channels` as const;
}

export function chatChannelDocId(space: string, channelId: string) {
	return `${space}:chats:channel:${channelId}` as const;
}