"use strict";

var Channel = require("./Channel.js");
var Cache = require("../Util/Cache.js");
var PermissionOverwrite = require("./PermissionOverwrite.js");
var ChannelPermissions = require("./ChannelPermissions.js");
var reg = require("../Util/ArgumentRegulariser.js").reg;

class ServerChannel extends Channel {
	constructor(data, client, server) {
		super(data, client);
		this.name = data.name;
		this.type = data.type;
		this.position = data.position;
		this.permissionOverwrites = new Cache();
		this.server = server;
		data.permission_overwrites.forEach(permission => {
			this.permissionOverwrites.add(new PermissionOverwrite(permission));
		});
	}

	permissionsOf(user) {
		user = this.client.internal.resolver.resolveUser(user);
		if (user) {
			if (this.server.owner.equals(user)) {
				return new ChannelPermissions(4294967295);
			}
			var everyoneRole = this.server.roles.get("name", "@everyone");

			var userRoles = [everyoneRole].concat(this.server.rolesOf(user) || []);
			var userRolesID = userRoles.map(v => v.id);
			var roleOverwrites = [],
			    memberOverwrites = [];

			this.permissionOverwrites.forEach(overwrite => {
				if (overwrite.type === "member" && overwrite.id === user.id) {
					memberOverwrites.push(overwrite);
				} else if (overwrite.type === "role" && overwrite.id in userRolesID) {
					roleOverwrites.push(overwrite);
				}
			});

			var permissions = 0;

			for (var serverRole of userRoles) {
				permissions |= serverRole.permissions;
			}

			for (var overwrite of roleOverwrites.concat(memberOverwrites)) {
				permissions = permissions & ~overwrite.deny;
				permissions = permissions | overwrite.allow;
			}

			return new ChannelPermissions(permissions);
		} else {
			return null;
		}
	}

	permsOf(user) {
		return this.permissionsOf(user);
	}

	mention() {
		return `<#${ this.id }>`;
	}

	toString() {
		return this.mention();
	}

	setName() {
		return this.client.setChannelName.apply(this.client, reg(this, arguments));
	}
}

module.exports = ServerChannel;