const { formatDate } = require('../core/utils.js');

module.exports = {
    timeout: 10000,
    immediate: true,
    name: 'Receipt Day Announcements',
    data: {
        channelId: process.env.NODE_ENV === 'development' ? '1468186493251227658' : '1462060674766344370',
        targetHour: 0,
        targetMinute: 1
    },
    async tick(client, timer) {

        //format date because isostring is utc duh 
        try {
            const today = new Date();
            const lastMonday = new Date(today);
            lastMonday.setDate(today.getDate() - ((today.getDay() === 0) ? 6 : today.getDay() - 1));
            const startDate = formatDate(lastMonday);

            const nextSunday = new Date(lastMonday);
            nextSunday.setDate(lastMonday.getDate() + 6);
            const endDate = formatDate(nextSunday);
            // 0 1 2 3 4 5 6
            // S M T W T F S
            let db = await client.localDB;
            const channel = await client.channels.fetch(timer.data.channelId);
            
            const config = await (await db.prepare(`SELECT weekly_budget, last_date_msg_receipts FROM bot_config`).get());
            const existingBudget = db.prepare(`SELECT id FROM weekly_budgets WHERE start_date = ?`).get(startDate);
            
            if (!existingBudget) {
                await channel.send(`Format date last monday ${lastMonday} as startDate Format date next sunday ${nextSunday} as endDate`);
                await channel.send(`\`\`\`SELECT id FROM weekly_budgets WHERE start_date = ${startDate}\`\`\`
                ${JSON.stringify(existingBudget)}`);
                console.log(`No budget found for week starting ${startDate}.`);
                const response = await fetch(`https://api.frankfurter.dev/v1/latest?amount=1&from=EUR&to=SEK`);


                if (!response.ok) await channel.send(`Failed to fetch exchange rate:\n${response.statusText}`);
                const data = await response.json();
                //await channel.send(`Fetched new exchange rate:\n${JSON.stringify(data)}`);
                await channel.send(`Reset weekly budget to ${config.weekly_budget}€ / ${config.weekly_budget*data.rates.SEK} kr`);


                db.prepare(`
                    INSERT INTO weekly_budgets (start_date, end_date, budget_amount, exchange_rate)
                    VALUES (?, ?, ?, ?)
                    `).run(startDate, endDate, config.weekly_budget, data.rates.SEK);

                await channel.send(`\`\`\`INSERT INTO weekly_budgets (start_date, end_date, budget_amount, exchange_rate)
                    VALUES (${startDate}, ${endDate}, ${config.weekly_budget}, ${data.rates.SEK})\`\`\``);
            } else {
                console.log(`budget found for week starting ${startDate}.`);
            }

            const notification = db.prepare(`
                SELECT EXISTS (
                    SELECT 1 FROM bot_config 
                    WHERE date(last_date_msg_receipts, 'localtime') = date('now', 'localtime')
                ) as was_sent_today
            `).get();

            const debug = db.prepare(`
                SELECT 
                    date(last_date_msg_receipts, 'localtime') AS last_date,
                    datetime('now', 'localtime') AS current_time_full,
                    (date(last_date_msg_receipts, 'localtime') = date('now', 'localtime')) AS was_sent_today
                FROM bot_config
                LIMIT 1;
            `).get();


            if (!notification.was_sent_today) {
                await channel.send(`\`\`\`SELECT 
                    date(last_date_msg_receipts, 'localtime') AS last_date,
                    datetime('now', 'localtime') AS current_time_full,
                    (date(last_date_msg_receipts, 'localtime') = date('now', 'localtime')) AS was_sent_today
                FROM bot_config
                LIMIT 1;\`\`\`
    
                ${JSON.stringify(debug)}`);
                const currentDate = new Date().toLocaleDateString('en-GB', {
                    weekday: 'long',
                    day: '2-digit',
                    month: '2-digit',
                    year: 'numeric'
                });
                await channel.send(`${currentDate}`);
                console.log("No notification today, sending...");
                db.prepare(`
                    UPDATE bot_config 
                    SET last_date_msg_receipts = CURRENT_TIMESTAMP 
                    WHERE id = 1
                    `).run();
            } else {
                console.log("Notification already sent");
            }


        } catch (error) {
            console.error('[TIMER] Error:', error);
        } finally {
            // 2. Schedule the NEXT tick manually
            await this.scheduleNext(client, timer);
        }
    },

    async scheduleNext(client, timer) {
        const now = new Date();
        const next = new Date();

        next.setHours(timer.data.targetHour, timer.data.targetMinute, 0, 0);

        if (next <= now) {
            next.setDate(next.getDate() + 1);
        }

        const delay = next.getTime() - now.getTime();

        if (timer.instance) clearTimeout(timer.instance);

        timer.instance = setTimeout(() => {
            this.tick(client, timer);
        }, delay);

        const channel = await client.channels.fetch(timer.data.channelId);
        //if (channel) await channel.send(`Next message scheduled for: ${next.toLocaleString()} with ms delta of ${delay} / ${delay/3600000}`);
        console.log(`[TIMER] Next message scheduled for: ${next.toLocaleString()}`);
    }
};