import XLSX from 'xlsx';
import { readFileSync } from 'fs';
import { processAdsExcel, mergeSalesAndAdsData } from './services/dataProcessor';
import { computeDiD } from './services/experimentAnalysis';
import { getExperimentAsins } from './services/experiments';
import { Experiment, CombinedKPIs } from './types';

// Simulate the getWeekStartSunday function from experimentAnalysis.ts
function getWeekStartSunday(year: number, week: number): number {
    const jan1 = new Date(year, 0, 1);
    const day = jan1.getDay();
    const startYear = new Date(year, 0, 1 - day);
    return startYear.getTime() + (week - 1) * 7 * 86400000;
}

async function run() {
    const buf = readFileSync('/tmp/Ads-Weekly.xlsx').buffer;
    const adsData = await processAdsExcel(buf);

    const merged = mergeSalesAndAdsData([], adsData);

    // Show the timestamps for INKEE DE weeks 
    const inkeeDE = merged.filter(m =>
        m.asin.startsWith('B0CQ') &&
        (m.marketplace || m.customer || '').includes('DE')
    );

    console.log('=== INKEE DE TIMESTAMP ANALYSIS ===');
    for (const r of inkeeDE.slice(0, 5)) {
        const weekStartTs = getWeekStartSunday(r.year, r.week);
        const weekStartDate = new Date(weekStartTs).toISOString().split('T')[0];
        console.log(`ASIN:${r.asin} ${r.year}-W${r.week} weekStart:${weekStartDate} cost:${r.cost.toFixed(2)}`);
    }

    console.log('\n=== WEEK DATE RANGES ===');
    for (let week = 1; week <= 8; week++) {
        const ts2025 = getWeekStartSunday(2025, week);
        const ts2026 = getWeekStartSunday(2026, week);
        const d2025 = new Date(ts2025).toISOString().split('T')[0];
        const d2026 = new Date(ts2026).toISOString().split('T')[0];
        console.log(`Week ${week}: 2025 → ${d2025} | 2026 → ${d2026}`);
    }

    // Now simulate an experiment that spans the existing data range
    // The experiment "INKEE DE" - let's test with dates in Jan 2026 (W1-W4)
    const testExperiment: Experiment = {
        id: 'test',
        name: 'INKEE DE Test',
        type: 'advertising',
        status: 'active',
        asins: ['B0CQ247T2V', 'B0CQTLZRCV'],
        control_asins: [],
        marketplace: 'DE',
        start_date: '2026-01-05',  // Start of week 2, 2026
        end_date: '2026-02-22',    // End of week 8, 2026
        baseline_start_date: '2025-01-06', // Week 2, 2025
        baseline_end_date: '2025-02-23',   // Week 8, 2025
        primary_metric: 'acos',
        notes: '',
        owner: ''
    };

    console.log('\n=== DiD SIMULATION ===');
    const did = computeDiD(testExperiment, merged as CombinedKPIs[]);
    console.log('ACOS:', did.metrics['acos']);
    console.log('ROAS:', did.metrics['roas']);
    console.log('Units:', did.metrics['units']);
}

run().catch(console.error);