const Embed = require("../embed");
const { User, getUserXP, checkUser, updateUserMessageCount, updateUserXPAndLevel } = require("../../models/user");
const { XPSetting, getXPSettings } = require("../../models/xp_setting");
const logger = require("../logger");

const self = module.exports = {
	xpSystem: async (client, message) => {
		try {
			// Check if message is from a server
			if (!message.server) {
				return; // Skip XP for DMs
			}

			await checkUser(message.author);
			const user = await getUserXP(message.author.id);
			const settings = await getXPSettings(message.server.id);
			
			// If no settings exist for this server, create default settings
			if (!settings) {
				const defaultSettings = {
					serverId: message.server.id,
					messages_per_xp: 3,
					min_xp_per_gain: 2,
					max_xp_per_gain: 12,
					weekend_multiplier: 2,
					weekend_days: "sat,sun",
					double_xp_enabled: false,
					level_up_enabled: true,
					level_up_channel: '01HF7B18Z864E10XSF22F9RFZQ'
				};
				await XPSetting.create(defaultSettings);
				return; // Skip this message, will work from next message
			}

			user.message_count++;
		
			if (user.message_count >= settings.messages_per_xp) {
				user.message_count = 0;
				let xpGain = Math.floor(Math.random() * (settings.max_xp_per_gain - settings.min_xp_per_gain + 1)) + settings.min_xp_per_gain;
		
				if (settings.double_xp_enabled || self.isWeekend(settings.weekend_days)) {
					xpGain *= settings.weekend_multiplier;
				}
		
				user.xp += xpGain;
		
				const newLevel = self.calculateLevel(user.xp);
				if (newLevel > user.level) {
					user.level = newLevel;
					if (settings.level_up_enabled) {
						const channel = client.channels.get(settings.level_up_channel);
						if (channel) {
							await self.sendLevelUpMessage(channel, message.author, newLevel);
						}
					}
				}
		
				await updateUserXPAndLevel(message.author.id, user.xp, user.level, user.message_count);
				logger.info('XP SYSTEM', `${message.author.username} gained ${xpGain} XP and is now level ${user.level}`);
			} else {
				await updateUserMessageCount(message.author.id, user.message_count);
			}
		} catch (error) {
			logger.error('XP SYSTEM', error);
		}
	},

	isWeekend: (weekendDays) => {
		const today = new Date().toLocaleDateString('en-US', { weekday: 'short' }).toLowerCase();
		return weekendDays.split(',').includes(today);
	},

	calculateLevel: (xp) => Math.floor(0.47 * Math.sqrt(xp)),

	sendLevelUpMessage: async (channel, user, newLevel) => {
        const embed = {
            title: 'Level Up!',
            description: `Congratulations ${user.username}! You've reached level ${newLevel}!`,
            colour: '#00FF00'
        };
        
        await channel.sendMessage({ embeds: [embed] });
    }
};