/**
 * Met à jour compare_at_price sur tous les produits Shopify existants
 * en lisant Prix marché / Prix remisé depuis Google Sheets.
 *
 * Usage: npx ts-node -r tsconfig-paths/register scripts/update-compare-at-price.ts
 */

import * as dotenv from 'dotenv'
dotenv.config({ path: '.env.local' })

import { readSheetProducts } from '../src/lib/googleSheets'
import { fetchAllShopifyProducts, getConfig } from '../src/lib/shopifySync'

async function main() {
  console.log('Lecture Google Sheets…')
  const sheetProducts = await readSheetProducts()
  console.log(`${sheetProducts.length} produits dans Sheets`)

  console.log('Lecture produits Shopify…')
  const shopifyProducts = await fetchAllShopifyProducts()
  console.log(`${shopifyProducts.length} produits dans Shopify`)

  const shopifyByHandle = new Map(shopifyProducts.map(p => [p.handle, p]))

  const { baseUrl, headers } = getConfig()

  let updated = 0
  let skipped = 0
  let errors = 0

  for (const sheet of sheetProducts) {
    const shopify = shopifyByHandle.get(sheet.handle)
    if (!shopify) { skipped++; continue }

    const newCompareAt = sheet.compareAtPrice ?? null
    const currentCompareAt = (shopify as { compareAtPrice?: string }).compareAtPrice ?? null

    // Normalise pour comparer (null vs undefined vs "0.00" vs null)
    const norm = (v: string | null) => (!v || v === '0.00') ? null : v
    if (norm(newCompareAt) === norm(currentCompareAt)) { skipped++; continue }

    // Récupère le variantId
    const detailRes = await fetch(`${baseUrl}/products/${shopify.shopifyId}.json?fields=variants`, { headers })
    if (!detailRes.ok) { console.error(`Erreur lecture variant ${sheet.ref}`); errors++; continue }
    const detail = await detailRes.json() as { product: { variants: Array<{ id: number }> } }
    const variantId = detail.product.variants[0]?.id
    if (!variantId) { errors++; continue }

    const res = await fetch(`${baseUrl}/products/${shopify.shopifyId}.json`, {
      method: 'PUT',
      headers,
      body: JSON.stringify({
        product: {
          id: shopify.shopifyId,
          variants: [{ id: variantId, price: sheet.price, compare_at_price: newCompareAt }],
        },
      }),
    })

    if (res.ok) {
      console.log(`✓ ${sheet.ref} — price=${sheet.price} compare_at=${newCompareAt ?? 'null'}`)
      updated++
    } else {
      const err = await res.text()
      console.error(`✗ ${sheet.ref} — ${err}`)
      errors++
    }

    // Rate limiting
    await new Promise(r => setTimeout(r, 300))
  }

  console.log(`\nTerminé : ${updated} mis à jour, ${skipped} inchangés, ${errors} erreurs`)
}

main().catch(err => { console.error(err); process.exit(1) })