// Debug
const { DebugBuilder } = require("../utilities/debugBuilder.js");
const log = new DebugBuilder("client", "clientController");
// Modules
const { status, join, leave } = require("./commandController")

/**
 * Get an object of client guilds
 * @param req The express request which includes the discord client
 * @returns 
 */
function getGuilds(req) {
    return req.discordClient.guilds.cache.map(guild => guild.id)
}

/**
 * Get an object of the channels in a guild
 * @param {*} guildId The Guild ID to check the channels of 
 * @param {*} req The request object to use to check the discord client
 */
function getChannels(guildId, req) {
    const guild = req.discordClient.guilds.find(guildId);
    log.DEBUG("Found Guild channels with guild", guild.channels, guild);
    return guild.channels;    
}

/**
 * Check to see if a given guild has a given channel
 * @param {*} guildId The guild ID to check if the channel exists
 * @param {*} channelId The channel ID to check if exists in the guild
 * @param {*} req The express request param to use the discord client
 * @returns {true|false}
 */
function checkIfGuildHasChannel(guildId, channelId, req){
    const guildChannels = getChannels(guildId, req)
    const checkedChannel = guildChannels.find(c => c.id === channelId);
    if (!checkedChannel) return false;

    return true; 
}

function getGuildFromChannel(channelId, req){
    const channel = req.discordClient.channels.cache.get(channelId);

    if (!channel) return new Error("Error getting channel from client");

    if (channel.guild) return channel.guild;

    return new Error("No Guild found with the given ID");
}

/**
 * Get Status of the discord process
 */
exports.getStatus = (req, res) => {
    log.INFO("Getting the status of the bot");
    guildIds = getGuilds(req);
    log.DEBUG("Guild IDs: ", guildIds);
    var guildStatuses = []
    for (const guildId of guildIds){
        status({guildID: guildId, callback: (statusObj) => {
            log.DEBUG("Status Object string: ", statusObj);
            guildStatuses.push(statusObj);
        }});        
    }    
    return res.status(200).json(guildStatuses);
}

/**
 * Start the bot and join the server and preset specified
 */
exports.joinServer = (req, res) => {
    const channelId = req.body.channelID;
    const presetName = req.body.presetName;
    const guildObj = getGuildFromChannel(channelId, req);

    if (!channelId || !presetName || !guildObj) return res.status(400).json({'message': "Request does not have all components to proceed"});
    
    // join the sever
    join({guildID: guildObj.id, guildObj: guildObj, channelID: channelId, callback: () => {
        return res.sendStatus(202);
    }});
}

/**
 * Leaves the server if it's in one
 */
exports.leaveServer = (req, res) => {
    log.INFO("Leaving the server");
    const guildIds = getGuilds(req);
    log.DEBUG("Guild IDs: ", guildIds);
    for (const guildId of guildIds){
        leave({guildID: guildId, callback: (response) => {
            log.DEBUG("Response from leaving server on guild ID", guildId, response);            
        }});
    }    
    return res.sendStatus(202);
}