import { test } from '@japa/runner'
import testUtils from '@adonisjs/core/services/test_utils'
import { DateTime } from 'luxon'

import {
  applySubscriptionToOrg,
  createTrialCheckoutSession,
  handleCheckoutCompleted,
  handlePaymentFailed,
  handleSubscriptionDeleted,
  handleSubscriptionUpdate,
  handleTrialWillEnd,
  TrialAlreadyConsumedError,
  __setTrialRecapEnqueueForTests,
} from '#services/stripe_billing'
import { dispatchWebhookEvent } from '#controllers/billing_controller'
import Organization from '#models/organization'

import { createTestUser } from '../helpers/auth.js'
import {
  fakeCheckoutSession,
  fakeInvoice,
  fakeSubscription,
  installStripeMock,
  uninstallStripeMock,
} from '../helpers/stripe_mock.js'

/**
 * Tests des handlers webhook + helper trial du service `stripe_billing`.
 *
 * Stratégie de mocking : on injecte un client Stripe partiel via
 * `installStripeMock()` (cf. helpers). Tous les appels SDK (retrieve,
 * sessions.create, billingPortal.create) sont stubés.
 *
 * Toutes les assertions DB tournent dans une transaction `withGlobalTransaction`
 * (auto-rollback per test) pour isoler les modifs.
 */

test.group('stripe_billing — applySubscriptionToOrg', (group) => {
  group.each.setup(() => testUtils.db().withGlobalTransaction())

  test('persiste plan, cycle, status, trial_end depuis une subscription Stripe', async ({
    assert,
  }) => {
    const { org } = await createTestUser()
    const trialEndEpoch = Math.floor(Date.now() / 1000) + 14 * 24 * 3600
    const periodEndEpoch = trialEndEpoch + 30 * 24 * 3600

    const sub = fakeSubscription({
      id: 'sub_test_apply',
      customerId: 'cus_test_apply',
      status: 'trialing',
      lookupKey: 'rubis_pro_monthly',
      currentPeriodEnd: periodEndEpoch,
      trialEnd: trialEndEpoch,
    })

    await applySubscriptionToOrg(org.id, sub)
    await org.refresh()

    assert.equal(org.plan, 'pro')
    assert.equal(org.subscriptionStatus, 'trialing')
    assert.equal(org.billingCycle, 'monthly')
    assert.equal(org.stripeSubscriptionId, 'sub_test_apply')
    assert.isNotNull(org.trialEndsAt)
    assert.equal(org.trialEndsAt?.toUnixInteger(), trialEndEpoch)
    assert.equal(org.currentPeriodEnd?.toUnixInteger(), periodEndEpoch)
    assert.isFalse(org.cancelAtPeriodEnd)
  })

  test('détecte cancel_at_period_end (true) ET cancel_at (timestamp)', async ({ assert }) => {
    const { org: orgA } = await createTestUser()
    const { org: orgB } = await createTestUser()

    // Cas A : cancel_at_period_end = true (API directe)
    await applySubscriptionToOrg(
      orgA.id,
      fakeSubscription({
        id: 'sub_cancel_a',
        lookupKey: 'rubis_pro_monthly',
        cancelAtPeriodEnd: true,
      })
    )
    await orgA.refresh()
    assert.isTrue(orgA.cancelAtPeriodEnd)

    // Cas B : cancel_at = timestamp (Customer Portal)
    await applySubscriptionToOrg(
      orgB.id,
      fakeSubscription({
        id: 'sub_cancel_b',
        lookupKey: 'rubis_pro_monthly',
        cancelAt: Math.floor(Date.now() / 1000) + 86_400,
      })
    )
    await orgB.refresh()
    assert.isTrue(orgB.cancelAtPeriodEnd)
  })

  test('idempotent : 2 appels successifs → même état final', async ({ assert }) => {
    const { org } = await createTestUser()
    const sub = fakeSubscription({
      id: 'sub_test_idem',
      status: 'active',
      lookupKey: 'rubis_business_yearly',
    })

    await applySubscriptionToOrg(org.id, sub)
    const firstState = (await Organization.findOrFail(org.id)).$attributes
    await applySubscriptionToOrg(org.id, sub)
    const secondState = (await Organization.findOrFail(org.id)).$attributes

    assert.equal(firstState['plan'], 'business')
    assert.equal(firstState['billingCycle'], 'yearly')
    assert.equal(firstState['subscriptionStatus'], secondState['subscriptionStatus'])
    assert.equal(firstState['stripeSubscriptionId'], secondState['stripeSubscriptionId'])
  })

  test('org introuvable → no-op silencieux (pas de throw)', async ({ assert }) => {
    // L'UUID non existant ne doit pas casser le webhook (Stripe retry sinon).
    await assert.doesNotReject(() =>
      applySubscriptionToOrg(
        '00000000-0000-0000-0000-000000000000',
        fakeSubscription({ lookupKey: 'rubis_pro_monthly' })
      )
    )
  })

  test('lookup_key inconnu → plan retombe sur free', async ({ assert }) => {
    const { org } = await createTestUser()
    await applySubscriptionToOrg(
      org.id,
      fakeSubscription({ lookupKey: 'unknown_key_xyz' })
    )
    await org.refresh()
    assert.equal(org.plan, 'free')
    assert.isNull(org.billingCycle)
  })
})

test.group('stripe_billing — handleSubscriptionUpdate (lookup org)', (group) => {
  group.each.setup(() => testUtils.db().withGlobalTransaction())

  test('lookup via metadata.organization_id', async ({ assert }) => {
    const { org } = await createTestUser()
    await handleSubscriptionUpdate(
      fakeSubscription({
        lookupKey: 'rubis_pro_monthly',
        organizationId: org.id,
        status: 'active',
      })
    )
    await org.refresh()
    assert.equal(org.plan, 'pro')
    assert.equal(org.subscriptionStatus, 'active')
  })

  test('fallback : lookup via stripeCustomerId si metadata absente', async ({ assert }) => {
    const { org } = await createTestUser()
    org.stripeCustomerId = 'cus_lookup_fallback'
    await org.save()

    await handleSubscriptionUpdate(
      fakeSubscription({
        customerId: 'cus_lookup_fallback',
        lookupKey: 'rubis_pro_monthly',
        status: 'active',
        // pas de metadata.organization_id
      })
    )
    await org.refresh()
    assert.equal(org.plan, 'pro')
  })

  test('aucun org trouvé → no-op silencieux', async ({ assert }) => {
    await assert.doesNotReject(() =>
      handleSubscriptionUpdate(
        fakeSubscription({
          customerId: 'cus_doesnt_exist_anywhere',
          lookupKey: 'rubis_pro_monthly',
        })
      )
    )
  })
})

test.group('stripe_billing — handleSubscriptionDeleted', (group) => {
  group.each.setup(() => testUtils.db().withGlobalTransaction())

  test('Pro avec sub → org passe en free + clear stripe fields', async ({ assert }) => {
    const { org } = await createTestUser()
    org.plan = 'pro'
    org.subscriptionStatus = 'active'
    org.billingCycle = 'monthly'
    org.stripeCustomerId = 'cus_to_delete'
    org.stripeSubscriptionId = 'sub_to_delete'
    org.currentPeriodEnd = DateTime.utc().plus({ days: 10 })
    org.cancelAtPeriodEnd = true
    await org.save()

    await handleSubscriptionDeleted(
      fakeSubscription({ customerId: 'cus_to_delete', id: 'sub_to_delete' })
    )
    await org.refresh()

    assert.equal(org.plan, 'free')
    assert.equal(org.subscriptionStatus, 'canceled')
    assert.isNull(org.stripeSubscriptionId)
    assert.isNull(org.billingCycle)
    assert.isNull(org.currentPeriodEnd)
    assert.isFalse(org.cancelAtPeriodEnd)
  })

  test('trial_ends_at conservé après cancellation (garde-fou anti-relance trial)', async ({
    assert,
  }) => {
    const { org } = await createTestUser()
    const oldTrialEnd = DateTime.utc().minus({ days: 30 })
    org.plan = 'pro'
    org.stripeCustomerId = 'cus_keep_trial'
    org.trialEndsAt = oldTrialEnd
    await org.save()

    await handleSubscriptionDeleted(
      fakeSubscription({ customerId: 'cus_keep_trial' })
    )
    await org.refresh()
    assert.isNotNull(org.trialEndsAt)
    assert.equal(org.trialEndsAt?.toUnixInteger(), oldTrialEnd.toUnixInteger())
  })

  test('customer inconnu → no-op', async ({ assert }) => {
    await assert.doesNotReject(() =>
      handleSubscriptionDeleted(fakeSubscription({ customerId: 'cus_ghost' }))
    )
  })
})

test.group('stripe_billing — handlePaymentFailed', (group) => {
  group.each.setup(() => testUtils.db().withGlobalTransaction())

  test('invoice.payment_failed → org marquée past_due', async ({ assert }) => {
    const { org } = await createTestUser()
    org.plan = 'pro'
    org.subscriptionStatus = 'active'
    org.stripeCustomerId = 'cus_payment_failed'
    await org.save()

    await handlePaymentFailed(fakeInvoice({ customerId: 'cus_payment_failed' }))
    await org.refresh()
    assert.equal(org.subscriptionStatus, 'past_due')
    // Plan reste pro pendant le grace period Stripe (smart retries).
    assert.equal(org.plan, 'pro')
  })

  test('customer null → no-op (jamais d\'invoice détachée)', async ({ assert }) => {
    await assert.doesNotReject(() => handlePaymentFailed(fakeInvoice({ customerId: null })))
  })

  test('customer inconnu → no-op', async ({ assert }) => {
    await assert.doesNotReject(() =>
      handlePaymentFailed(fakeInvoice({ customerId: 'cus_ghost' }))
    )
  })
})

test.group('stripe_billing — handleTrialWillEnd (enqueue recap)', (group) => {
  let enqueueCalls: Array<{ orgId: string; subscriptionId: string }> = []

  group.each.setup(() => testUtils.db().withGlobalTransaction())
  group.each.setup(() => {
    enqueueCalls = []
    __setTrialRecapEnqueueForTests(async (orgId, subscriptionId) => {
      enqueueCalls.push({ orgId, subscriptionId })
    })
    return () => {
      // Reset entre les tests pour ne pas leak entre suites.
      __setTrialRecapEnqueueForTests(async () => {})
    }
  })

  test('enqueue recap pour l\'org matchée via customerId', async ({ assert }) => {
    const { org } = await createTestUser()
    org.stripeCustomerId = 'cus_trial_will_end'
    await org.save()

    await handleTrialWillEnd(
      fakeSubscription({
        id: 'sub_trial_99',
        customerId: 'cus_trial_will_end',
        status: 'trialing',
      })
    )
    assert.lengthOf(enqueueCalls, 1)
    assert.equal(enqueueCalls[0]?.orgId, org.id)
    assert.equal(enqueueCalls[0]?.subscriptionId, 'sub_trial_99')
  })

  test('customer inconnu → pas d\'enqueue', async ({ assert }) => {
    await handleTrialWillEnd(
      fakeSubscription({ customerId: 'cus_ghost', status: 'trialing' })
    )
    assert.lengthOf(enqueueCalls, 0)
  })
})

test.group('stripe_billing — handleCheckoutCompleted (avec Stripe mock)', (group) => {
  group.each.setup(() => testUtils.db().withGlobalTransaction())
  group.each.teardown(() => uninstallStripeMock())

  test('retrieve subscription Stripe puis apply → org Pro trialing', async ({ assert }) => {
    const { org } = await createTestUser()
    const trialEndEpoch = Math.floor(Date.now() / 1000) + 14 * 24 * 3600

    installStripeMock({
      subscriptions: {
        retrieve: (async () =>
          fakeSubscription({
            id: 'sub_completed',
            status: 'trialing',
            lookupKey: 'rubis_pro_monthly',
            trialEnd: trialEndEpoch,
            organizationId: org.id,
          })) as unknown as import('stripe').default['subscriptions']['retrieve'],
      },
    })

    await handleCheckoutCompleted(
      fakeCheckoutSession({
        id: 'cs_done',
        organizationId: org.id,
        subscriptionId: 'sub_completed',
      })
    )
    await org.refresh()
    assert.equal(org.plan, 'pro')
    assert.equal(org.subscriptionStatus, 'trialing')
    assert.equal(org.trialEndsAt?.toUnixInteger(), trialEndEpoch)
  })

  test('session sans subscription → no-op', async ({ assert }) => {
    const { org } = await createTestUser()
    await handleCheckoutCompleted(
      fakeCheckoutSession({ organizationId: org.id, subscriptionId: null })
    )
    await org.refresh()
    assert.equal(org.plan, 'free') // pas touché
  })

  test('session sans organization_id metadata → no-op', async ({ assert }) => {
    await handleCheckoutCompleted(
      fakeCheckoutSession({
        organizationId: null,
        subscriptionId: 'sub_should_be_ignored',
      })
    )
    // Pas d'assertion DB nécessaire — le no-op réussit silencieusement.
    assert.isTrue(true)
  })
})

test.group('stripe_billing — createTrialCheckoutSession (idempotence)', (group) => {
  group.each.setup(() => testUtils.db().withGlobalTransaction())
  group.each.teardown(() => uninstallStripeMock())

  test('throw TrialAlreadyConsumedError si trialEndsAt déjà posé', async ({ assert }) => {
    const { org } = await createTestUser()
    org.trialEndsAt = DateTime.utc().minus({ days: 30 })
    org.stripeCustomerId = 'cus_test_idem'
    await org.save()

    await assert.rejects(
      () =>
        createTrialCheckoutSession({
          org,
          customerId: 'cus_test_idem',
          plan: 'pro',
          cycle: 'monthly',
        }),
      TrialAlreadyConsumedError
    )
  })

  test('throw TrialAlreadyConsumedError si stripeSubscriptionId déjà posé', async ({
    assert,
  }) => {
    const { org } = await createTestUser()
    org.stripeSubscriptionId = 'sub_existing'
    org.stripeCustomerId = 'cus_test_idem2'
    await org.save()

    await assert.rejects(
      () =>
        createTrialCheckoutSession({
          org,
          customerId: 'cus_test_idem2',
          plan: 'pro',
          cycle: 'monthly',
        }),
      TrialAlreadyConsumedError
    )
  })

  test('happy path : crée la session Checkout avec trial_period_days=14', async ({
    assert,
  }) => {
    const { org } = await createTestUser()
    org.stripeCustomerId = 'cus_happy'
    await org.save()

    const sessionCalls: Array<Record<string, unknown>> = []
    installStripeMock({
      prices: {
        list: (async () => ({
          data: [{ id: 'price_pro_monthly_test' }],
        })) as unknown as import('stripe').default['prices']['list'],
      },
      checkout: {
        sessions: {
          create: (async (params: Record<string, unknown>) => {
            sessionCalls.push(params)
            return { id: 'cs_new', url: 'https://checkout.stripe.test/cs_new' }
          }) as unknown as import('stripe').default['checkout']['sessions']['create'],
        },
      },
    })

    const result = await createTrialCheckoutSession({
      org,
      customerId: 'cus_happy',
      plan: 'pro',
      cycle: 'monthly',
    })

    assert.equal(result.url, 'https://checkout.stripe.test/cs_new')
    assert.lengthOf(sessionCalls, 1)
    const params = sessionCalls[0] as {
      subscription_data?: { trial_period_days?: number; metadata?: Record<string, string> }
      metadata?: Record<string, string>
    }
    assert.equal(params.subscription_data?.trial_period_days, 14)
    assert.equal(params.subscription_data?.metadata?.['organization_id'], org.id)
    assert.equal(params.metadata?.['is_trial'], 'true')
  })
})

test.group('stripe_billing — dispatchWebhookEvent (router)', (group) => {
  group.each.setup(() => testUtils.db().withGlobalTransaction())

  test('event inconnu → no-op silencieux (pas de throw)', async ({ assert }) => {
    const evt = {
      id: 'evt_unknown',
      type: 'customer.tax_id.created',
      data: { object: {} },
    } as unknown as import('stripe').default.Event
    await assert.doesNotReject(() => dispatchWebhookEvent(evt))
  })

  test('customer.subscription.deleted route bien vers handleSubscriptionDeleted', async ({
    assert,
  }) => {
    const { org } = await createTestUser()
    org.plan = 'pro'
    org.stripeCustomerId = 'cus_routed'
    org.stripeSubscriptionId = 'sub_routed'
    await org.save()

    const evt = {
      id: 'evt_deleted',
      type: 'customer.subscription.deleted',
      data: {
        object: fakeSubscription({ customerId: 'cus_routed', id: 'sub_routed' }),
      },
    } as unknown as import('stripe').default.Event

    await dispatchWebhookEvent(evt)
    await org.refresh()
    assert.equal(org.plan, 'free')
    assert.equal(org.subscriptionStatus, 'canceled')
  })
})