/*
	Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
	Copyright (C) 2023 Spacebar and Spacebar Contributors

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero General Public License as published
	by the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Affero General Public License for more details.

	You should have received a copy of the GNU Affero General Public License
	along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

import { User } from "./User";
import { Member } from "./Member";
import { Role } from "./Role";
import { Channel } from "./Channel";
import { InteractionType } from "../interfaces/Interaction";
import { Application } from "./Application";
import { Column, CreateDateColumn, Entity, Index, JoinColumn, JoinTable, ManyToMany, ManyToOne, OneToMany, RelationId } from "typeorm";
import { BaseClass } from "./BaseClass";
import { Guild } from "./Guild";
import { Webhook } from "./Webhook";
import { Sticker } from "./Sticker";
import { Attachment } from "./Attachment";
import { NewUrlUserSignatureData } from "../Signing";
import { ActionRowComponent, ApplicationCommandType, Embed, MessageType, PartialMessage, Poll, Reaction } from "@spacebar/schemas";

@Entity({
	name: "messages",
})
@Index(["channel_id", "id"], { unique: true })
export class Message extends BaseClass {
	@Column({ nullable: true })
	@RelationId((message: Message) => message.channel)
	@Index()
	channel_id?: string;

	@JoinColumn({ name: "channel_id" })
	@ManyToOne(() => Channel, {
		onDelete: "CASCADE",
	})
	channel: Channel;

	@Column({ nullable: true })
	@RelationId((message: Message) => message.guild)
	guild_id?: string;

	@JoinColumn({ name: "guild_id" })
	@ManyToOne(() => Guild, {
		onDelete: "CASCADE",
	})
	guild?: Guild;

	@Column({ nullable: true })
	@RelationId((message: Message) => message.author)
	@Index()
	author_id?: string;

	@JoinColumn({ name: "author_id", referencedColumnName: "id" })
	@ManyToOne(() => User, {
		onDelete: "CASCADE",
	})
	author?: User;

	@Column({ nullable: true })
	@RelationId((message: Message) => message.member)
	member_id?: string;

	@JoinColumn({ name: "member_id", referencedColumnName: "id" })
	@ManyToOne(() => User, {
		onDelete: "CASCADE",
	})
	member?: Member;

	@Column({ nullable: true })
	@RelationId((message: Message) => message.webhook)
	webhook_id?: string;

	@JoinColumn({ name: "webhook_id" })
	@ManyToOne(() => Webhook)
	webhook?: Webhook;

	@Column({ nullable: true })
	@RelationId((message: Message) => message.application)
	application_id?: string;

	@JoinColumn({ name: "application_id" })
	@ManyToOne(() => Application)
	application?: Application;

	@Column({ nullable: true })
	content?: string;

	@Column()
	@CreateDateColumn()
	timestamp: Date;

	@Column({ nullable: true })
	edited_timestamp?: Date;

	@Column({ nullable: true })
	tts?: boolean;

	@Column({ nullable: true })
	mention_everyone?: boolean;

	@JoinTable({ name: "message_user_mentions" })
	@ManyToMany(() => User)
	mentions: User[];

	@JoinTable({ name: "message_role_mentions" })
	@ManyToMany(() => Role)
	mention_roles: Role[];

	@JoinTable({ name: "message_channel_mentions" })
	@ManyToMany(() => Channel)
	mention_channels: Channel[];

	@JoinTable({ name: "message_stickers" })
	@ManyToMany(() => Sticker, { cascade: true, onDelete: "CASCADE" })
	sticker_items?: Sticker[];

	@OneToMany(() => Attachment, (attachment: Attachment) => attachment.message, {
		cascade: true,
		orphanedRowAction: "delete",
	})
	attachments?: Attachment[];

	@Column({ type: "simple-json" })
	embeds: Embed[];

	@Column({ type: "simple-json" })
	reactions: Reaction[];

	@Column({ type: "text", nullable: true })
	nonce?: string;

	@Column({ nullable: true, type: Date })
	pinned_at?: Date | null;

	get pinned(): boolean {
		return this.pinned_at != null;
	}

	@Column({ type: "int" })
	type: MessageType;

	@Column({ type: "simple-json", nullable: true })
	activity?: {
		type: number;
		party_id: string;
	};

	@Column({ default: 0 })
	flags: number;

	@Column({ type: "simple-json", nullable: true })
	message_reference?: {
		message_id: string;
		channel_id?: string;
		guild_id?: string;
		type?: number; // 0 = DEFAULT, 1 = FORWARD
	};

	@JoinColumn({ name: "message_reference_id" })
	@ManyToOne(() => Message, { onDelete: "SET NULL" })
	referenced_message?: Message | null;

	@Column({ type: "simple-json", nullable: true })
	interaction?: {
		id: string;
		type: InteractionType;
		name: string;
	};

	@Column({ type: "simple-json", nullable: true })
	interaction_metadata?: {
		id: string;
		type: InteractionType;
		user_id: string;
		authorizing_integration_owners: object;
		name: string;
		command_type: ApplicationCommandType;
	};

	@Column({ type: "simple-json", nullable: true })
	components?: ActionRowComponent[];

	@Column({ type: "simple-json", nullable: true })
	poll?: Poll;

	@Column({ nullable: true })
	username?: string;

	@Column({ nullable: true })
	avatar?: string;

	toJSON(): Message {
		return {
			...this,
			author_id: undefined,
			member_id: undefined,
			webhook_id: this.webhook_id ?? undefined,
			application_id: undefined,

			nonce: this.nonce ?? undefined,
			tts: this.tts ?? false,
			guild: this.guild ?? undefined,
			webhook: this.webhook ?? undefined,
			interaction: this.interaction ?? undefined,
			interaction_metadata: this.interaction_metadata ?? undefined,
			reactions: this.reactions ?? undefined,
			sticker_items: this.sticker_items ?? undefined,
			message_reference: this.message_reference ?? undefined,
			author: {
				...(this.author?.toPublicUser() ?? undefined),
				// Webhooks
				username: this.username ?? this.author?.username,
				avatar: this.avatar ?? this.author?.avatar,
			},
			activity: this.activity ?? undefined,
			application: this.application ?? undefined,
			components: this.components ?? undefined,
			poll: this.poll ?? undefined,
			content: this.content ?? "",
			pinned: this.pinned,
		};
	}

	toPartialMessage(): PartialMessage {
		return {
			id: this.id,
			// lobby_id: this.lobby_id,
			channel_id: this.channel_id!,
			type: this.type,
			content: this.content!,
			author: { ...this.author!, avatar: this.author?.avatar ?? null },
			flags: this.flags,
			application_id: this.application_id,
			//channel: this.channel, // TODO: ephemeral DM channels
			// recipient_id: this.recipient_id, // TODO: ephemeral DM channels
		};
	}

	withSignedAttachments(data: NewUrlUserSignatureData) {
		return {
			...this,
			attachments: this.attachments?.map((attachment: Attachment) => Attachment.prototype.signUrls.call(attachment, data)),
		};
	}

	static async createWithDefaults(opts: Partial<Message>): Promise<Message> {
		const message = Message.create();

		if (!opts.author) {
			if (!opts.author_id) throw new Error("Either author or author_id must be provided to create a Message");
			opts.author = await User.findOneOrFail({ where: { id: opts.author_id! } });
		}

		if (!opts.channel) {
			if (!opts.channel_id) throw new Error("Either channel or channel_id must be provided to create a Message");
			opts.channel = await Channel.findOneOrFail({ where: { id: opts.channel_id! } });
			opts.guild_id ??= opts.channel.guild_id;
		}

		if (!opts.member_id) opts.member_id = message.author_id;
		if (!opts.member) opts.member = await Member.findOneOrFail({ where: { id: opts.member_id! } });

		if (!opts.guild) {
			if (opts.guild_id) opts.guild = await Guild.findOneOrFail({ where: { id: opts.guild_id! } });
			else if (opts.channel?.guild?.id) opts.guild = opts.channel.guild;
			else if (opts.channel?.guild_id) opts.guild = await Guild.findOneOrFail({ where: { id: opts.channel.guild_id! } });
			else if (opts.member?.guild?.id) opts.guild = opts.member.guild;
			else if (opts.member?.guild_id) opts.guild = await Guild.findOneOrFail({ where: { id: opts.member.guild_id! } });
			else throw new Error("Either guild, guild_id, channel.guild, channel.guild_id, member.guild or member.guild_id must be provided to create a Message");
		}

		// try 2 now that we have a guild
		if (!opts.member) opts.member = await Member.findOneOrFail({ where: { id: opts.author!.id, guild_id: opts.guild!.id } });

		// set reply type if a message if referenced
		if (opts.message_reference && !opts.type) message.type = MessageType.REPLY;

		// backpropagate ids
		opts.channel_id = opts.channel.id;
		opts.guild_id = opts.guild.id;
		opts.author_id = opts.author.id;
		opts.member_id = opts.member.id;
		opts.webhook_id = opts.webhook?.id;
		opts.application_id = opts.application?.id;

		Object.assign(message, {
			tts: false,
			embeds: [],
			reactions: [],
			flags: 0,
			type: 0,
			timestamp: new Date(),
			...opts,
		});
		return message;
	}
}