const { outputProgress } = require('./utils/progress');
const { getConnection } = require('./utils/db');

async function calculateFinancialMetrics(startTime, totalProducts, processedCount) {
    const connection = await getConnection();
    try {
        outputProgress({
            status: 'running',
            operation: 'Calculating financial metrics',
            current: Math.floor(totalProducts * 0.6),
            total: totalProducts,
            elapsed: formatElapsedTime(startTime),
            remaining: estimateRemaining(startTime, Math.floor(totalProducts * 0.6), totalProducts),
            rate: calculateRate(startTime, Math.floor(totalProducts * 0.6)),
            percentage: '60'
        });

        await connection.query(`
            UPDATE product_metrics pm
            JOIN (
                SELECT 
                    p.pid,
                    p.cost_price * p.stock_quantity as inventory_value,
                    SUM(o.quantity * o.price) as total_revenue,
                    SUM(o.quantity * p.cost_price) as cost_of_goods_sold,
                    SUM(o.quantity * (o.price - p.cost_price)) as gross_profit,
                    MIN(o.date) as first_sale_date,
                    MAX(o.date) as last_sale_date,
                    DATEDIFF(MAX(o.date), MIN(o.date)) + 1 as calculation_period_days
                FROM products p
                LEFT JOIN orders o ON p.pid = o.pid
                WHERE o.canceled = false
                    AND DATE(o.date) >= DATE_SUB(CURDATE(), INTERVAL 12 MONTH)
                GROUP BY p.pid
            ) fin ON pm.pid = fin.pid
            SET 
                pm.inventory_value = COALESCE(fin.inventory_value, 0),
                pm.total_revenue = COALESCE(fin.total_revenue, 0),
                pm.cost_of_goods_sold = COALESCE(fin.cost_of_goods_sold, 0),
                pm.gross_profit = COALESCE(fin.gross_profit, 0),
                pm.gmroi = CASE 
                    WHEN COALESCE(fin.inventory_value, 0) > 0 AND fin.calculation_period_days > 0 THEN 
                        (COALESCE(fin.gross_profit, 0) * (365.0 / fin.calculation_period_days)) / COALESCE(fin.inventory_value, 0)
                    ELSE 0 
                END
        `);

        // Update time-based aggregates with financial metrics
        await connection.query(`
            UPDATE product_time_aggregates pta
            JOIN (
                SELECT 
                    p.pid,
                    YEAR(o.date) as year,
                    MONTH(o.date) as month,
                    p.cost_price * p.stock_quantity as inventory_value,
                    SUM(o.quantity * (o.price - p.cost_price)) as gross_profit,
                    COUNT(DISTINCT DATE(o.date)) as days_in_period
                FROM products p
                LEFT JOIN orders o ON p.pid = o.pid
                WHERE o.canceled = false
                GROUP BY p.pid, YEAR(o.date), MONTH(o.date)
            ) fin ON pta.pid = fin.pid 
                AND pta.year = fin.year 
                AND pta.month = fin.month
            SET 
                pta.inventory_value = COALESCE(fin.inventory_value, 0),
                pta.gmroi = CASE 
                    WHEN COALESCE(fin.inventory_value, 0) > 0 AND fin.days_in_period > 0 THEN 
                        (COALESCE(fin.gross_profit, 0) * (365.0 / fin.days_in_period)) / COALESCE(fin.inventory_value, 0)
                    ELSE 0 
                END
        `);

        return Math.floor(totalProducts * 0.7);
    } finally {
        connection.release();
    }
}

module.exports = calculateFinancialMetrics;