import AdminJS from 'adminjs'
import AdminJSFastify from '@adminjs/fastify'
import { Database, Resource, getModelByName } from '@adminjs/prisma'
import bcrypt from 'bcrypt'
import Stripe from 'stripe'
import { exec } from 'child_process'
import { prisma } from './src/lib/db.mjs'

AdminJS.registerAdapter({ Database, Resource })

const stripe = process.env.STRIPE_SECRET_KEY
  ? new Stripe(process.env.STRIPE_SECRET_KEY)
  : null

// ── Auto-build (prod only) ──────────────────────────────────────────────────
let buildTimeout = null
let buildInProgress = false

function triggerBuild() {
  if (process.env.NODE_ENV !== 'production') {
    console.log('[admin] Dev mode — skipping build')
    return
  }
  if (buildTimeout) clearTimeout(buildTimeout)
  buildTimeout = setTimeout(() => {
    if (buildInProgress) return
    buildInProgress = true
    console.log('[admin] Building site...')
    exec('pnpm build', { cwd: process.cwd(), timeout: 120_000 }, (err, stdout, stderr) => {
      buildInProgress = false
      if (err) console.error('[admin] Build FAILED:', stderr)
      else console.log('[admin] Build OK')
    })
  }, 5_000)
}

const afterBuildHook = async (response) => { triggerBuild(); return response }

// ── Stripe price sync after product edit ─────────────────────────────────────
async function syncPriceToStripe(response) {
  if (!stripe) return response

  const product = await prisma.product.findUnique({
    where: { id: response.record.params.id },
  })
  if (!product) return response

  const priceCents = product.price
  const currency = (product.currency || 'EUR').toLowerCase()
  const slug = product.slug

  try {
    // 1. Find or create Stripe product by metadata.slug
    let stripeProduct = null
    const existing = await stripe.products.search({ query: `metadata["slug"]:"${slug}"` })
    if (existing.data.length > 0) {
      stripeProduct = existing.data[0]
      // Update product info
      await stripe.products.update(stripeProduct.id, {
        name: product.productDisplayName,
        description: product.description,
        images: product.ogImage ? [product.ogImage] : undefined,
        active: true,
      })
    } else if (priceCents) {
      stripeProduct = await stripe.products.create({
        name: product.productDisplayName,
        description: product.description,
        images: product.ogImage ? [product.ogImage] : [],
        metadata: { slug, stripeKey: product.stripeKey || slug, dbId: product.id },
      })
      console.log(`[stripe] Product created: ${stripeProduct.id}`)
    }

    if (!stripeProduct) return response

    // 2. If price is null, archive old price and clear DB
    if (!priceCents) {
      if (product.stripePriceId) {
        await stripe.prices.update(product.stripePriceId, { active: false })
        await prisma.product.update({ where: { id: product.id }, data: { stripePriceId: null } })
        console.log(`[stripe] Price archived (product has no price now)`)
      }
      return response
    }

    // 3. Check if current Stripe price matches
    if (product.stripePriceId) {
      try {
        const currentPrice = await stripe.prices.retrieve(product.stripePriceId)
        if (currentPrice.unit_amount === priceCents && currentPrice.currency === currency && currentPrice.active) {
          // Price unchanged
          return response
        }
        // Archive old price
        await stripe.prices.update(product.stripePriceId, { active: false })
        console.log(`[stripe] Old price archived: ${product.stripePriceId}`)
      } catch {
        // Old price doesn't exist, continue
      }
    }

    // 4. Create new price
    const newPrice = await stripe.prices.create({
      product: stripeProduct.id,
      unit_amount: priceCents,
      currency,
      metadata: { slug, dbId: product.id },
    })
    console.log(`[stripe] New price created: ${newPrice.id} (${priceCents / 100} ${currency.toUpperCase()})`)

    // 5. Update DB
    await prisma.product.update({
      where: { id: product.id },
      data: { stripePriceId: newPrice.id },
    })

  } catch (err) {
    console.error(`[stripe] Sync error for ${slug}:`, err.message)
  }

  return response
}

// ── AdminJS setup ───────────────────────────────────────────────────────────
export async function setupAdmin(app) {
  const admin = new AdminJS({
    rootPath: '/admin',
    resources: [
      {
        resource: { model: getModelByName('Product'), client: prisma },
        options: {
          navigation: { name: 'Contenu', icon: 'Package' },
          listProperties: ['sortOrder', 'name', 'type', 'price', 'isPublished', 'updatedAt'],
          editProperties: [
            'slug', 'sortOrder', 'index', 'name', 'type', 'materials',
            'year', 'status', 'description', 'specs', 'notes',
            'imagePath', 'imageAlt',
            'seoTitle', 'seoDescription', 'ogImage',
            'productDisplayName', 'price', 'currency', 'availability',
            'stripePriceId', 'stripeKey', 'isPublished',
          ],
          properties: {
            description: { type: 'textarea' },
            specs: { type: 'textarea' },
            notes: { type: 'textarea' },
            seoDescription: { type: 'textarea' },
          },
          actions: {
            new: { after: [syncPriceToStripe, afterBuildHook] },
            edit: { after: [syncPriceToStripe, afterBuildHook] },
            delete: { after: [afterBuildHook] },
          },
        },
      },
      {
        resource: { model: getModelByName('Order'), client: prisma },
        options: {
          navigation: { name: 'Commerce', icon: 'CreditCard' },
          listProperties: ['stripeSessionId', 'status', 'amount', 'customerEmail', 'productSlug', 'createdAt'],
          actions: {
            new: { isAccessible: false },
            edit: { isAccessible: false },
            delete: { isAccessible: false },
          },
        },
      },
    ],
    branding: {
      companyName: 'REBOURS Studio',
      logo: false,
      withMadeWithLove: false,
    },
  })

  await AdminJSFastify.buildAuthenticatedRouter(
    admin,
    {
      authenticate: async (email, password) => {
        const user = await prisma.adminUser.findUnique({ where: { email } })
        if (!user) return null
        const valid = await bcrypt.compare(password, user.passwordHash)
        return valid ? { email: user.email, id: user.id } : null
      },
      cookiePassword: process.env.COOKIE_SECRET ?? 'super-secret-cookie-password-at-least-32-chars',
      cookieName: 'adminjs',
    },
    app,
    {
      saveUninitialized: false,
      cookie: {
        httpOnly: true,
        secure: process.env.NODE_ENV === 'production',
      },
    }
  )

  return admin
}