/**
 * Factories — créent des entités réalistes (FR, format Rubis) pour
 * peupler une org de démo ou alimenter des tests.
 *
 * Pas de framework lourd type @adonisjs/lucid factories : des fonctions
 * pures, idempotentes, qu'on compose dans une commande Ace ou un test.
 */

import { DateTime } from 'luxon'
import { randomUUID } from 'node:crypto'
import type { TransactionClientContract } from '@adonisjs/lucid/types/database'

import Client from '#models/client'
import Invoice from '#models/invoice'
import ActivityEvent from '#models/activity_event'
import type Plan from '#models/plan'

// ---------------------------------------------------------------------------
// Sources de données déterministes (pas de Faker — moins de deps, plus stable)
// ---------------------------------------------------------------------------

const CLIENT_TEMPLATES: Array<{
  name: string
  firstName: string | null
  lastName: string | null
  emailDomain: string
  phone: string | null
  address: string | null
  siret: string | null
}> = [
  {
    name: 'Boulangerie Martin SARL',
    firstName: 'Marie',
    lastName: 'Martin',
    emailDomain: 'boulangerie-martin.fr',
    phone: '+33 1 23 45 67 89',
    address: '12 rue du Pain, 75011 Paris',
    siret: '82345678900012',
  },
  {
    name: 'Maçonnerie Dupont & Fils',
    firstName: 'Jean',
    lastName: 'Dupont',
    emailDomain: 'maconnerie-dupont.fr',
    phone: '+33 4 78 56 12 34',
    address: '45 chemin des Carrières, 69100 Villeurbanne',
    siret: '53412987600028',
  },
  {
    name: 'Atelier Durand',
    firstName: null,
    lastName: null,
    emailDomain: 'atelier-durand.fr',
    phone: null,
    address: null,
    siret: null,
  },
  {
    name: 'Cabinet Rousseau Conseil',
    firstName: 'Julien',
    lastName: 'Rousseau',
    emailDomain: 'cabinet-rousseau.fr',
    phone: '+33 4 56 78 90 12',
    address: '8 place de la République, 69002 Lyon',
    siret: '53412987600101',
  },
  {
    name: 'Garage Lemoine',
    firstName: 'Pierre',
    lastName: 'Lemoine',
    emailDomain: 'garage-lemoine.fr',
    phone: '+33 2 99 87 65 43',
    address: '23 boulevard de la Liberté, 35000 Rennes',
    siret: '78912345600054',
  },
  {
    name: 'Studio Lefèvre',
    firstName: 'Camille',
    lastName: 'Lefèvre',
    emailDomain: 'studio-lefevre.com',
    phone: null,
    address: null,
    siret: null,
  },
  {
    name: 'Restaurant Le Beauvoir',
    firstName: 'Sophie',
    lastName: 'Beauvoir',
    emailDomain: 'le-beauvoir.fr',
    phone: '+33 1 45 22 33 44',
    address: '15 rue Mouffetard, 75005 Paris',
    siret: '12345678900078',
  },
  {
    name: 'Imprimerie Henri & Fils',
    firstName: 'Henri',
    lastName: 'Petit',
    emailDomain: 'imprimerie-henri.fr',
    phone: '+33 5 61 78 90 23',
    address: '7 avenue Jean Jaurès, 31000 Toulouse',
    siret: '45123789600041',
  },
]

const INVOICE_NOTES_POOL = [
  'Prestation conseil — janvier',
  'Travaux de rénovation second œuvre',
  'Photographe événementiel — mariage',
  'Maintenance trimestrielle',
  'Livraison matières premières',
  'Audit comptable annuel',
  null,
  null,
]

// ---------------------------------------------------------------------------
// Factories
// ---------------------------------------------------------------------------

export type ClientFactoryInput = {
  organizationId: string
  trx?: TransactionClientContract
  /** Index 0..N dans CLIENT_TEMPLATES, sinon valeurs random. */
  index?: number
}

export async function makeClient(input: ClientFactoryInput): Promise<Client> {
  const tpl =
    input.index !== undefined
      ? CLIENT_TEMPLATES[input.index % CLIENT_TEMPLATES.length]!
      : CLIENT_TEMPLATES[Math.floor(Math.random() * CLIENT_TEMPLATES.length)]!

  const inboxName = tpl.firstName
    ? `${tpl.firstName.toLowerCase()}@${tpl.emailDomain}`
    : `compta@${tpl.emailDomain}`

  return Client.create(
    {
      organizationId: input.organizationId,
      name: tpl.name,
      email: inboxName,
      contactFirstName: tpl.firstName,
      contactLastName: tpl.lastName,
      phone: tpl.phone,
      address: tpl.address,
      siret: tpl.siret,
      notes: null,
    },
    { client: input.trx }
  )
}

export type InvoiceStatus = Invoice['status']

export type InvoiceFactoryInput = {
  organizationId: string
  clientId: string
  planId: string | null
  /** Status cible — drive aussi les dates (pending = future, paid = passé). */
  status: InvoiceStatus
  /** Numéro override, sinon F-YYYY-XXXX random. */
  numero?: string
  /** Montant en centimes. Sinon random 250€-8000€. */
  amountTtcCents?: number
  /** Décalage en jours par rapport à aujourd'hui pour issueDate.
   *  Négatif = passé. */
  issueOffsetDays?: number
  /** Délai de paiement en jours (par défaut 30, conforme LME). */
  paymentTermDays?: number
  trx?: TransactionClientContract
}

export async function makeInvoice(input: InvoiceFactoryInput): Promise<Invoice> {
  const issueOffset = input.issueOffsetDays ?? -randomInt(7, 90)
  const paymentTerm = input.paymentTermDays ?? 30
  const issueDate = DateTime.utc().plus({ days: issueOffset }).startOf('day')
  const dueDate = issueDate.plus({ days: paymentTerm })
  const amount = input.amountTtcCents ?? randomInt(25_000, 800_000)
  const numero =
    input.numero ?? `F-${issueDate.year}-${String(randomInt(1, 9999)).padStart(4, '0')}`

  // paidAt : pour les statuts paid, on simule un paiement après l'échéance
  // (parfois en avance, parfois en retard — réaliste).
  let paidAt: DateTime | null = null
  if (input.status === 'paid') {
    const paidOffset = randomInt(-5, 25) // -5 = payé en avance, +25 = en retard
    paidAt = dueDate.plus({ days: paidOffset })
  }

  // rubisEarned : 1 par relance envoyée + 1 si payée
  let rubisEarned = 0
  if (input.status === 'in_relance' || input.status === 'awaiting_user_confirmation') {
    rubisEarned = randomInt(1, 3)
  } else if (input.status === 'paid') {
    rubisEarned = randomInt(0, 4) // certaines payées sans relance
  }

  return Invoice.create(
    {
      organizationId: input.organizationId,
      clientId: input.clientId,
      planId: input.planId,
      numero,
      amountTtcCents: amount,
      issueDate,
      dueDate,
      paidAt,
      status: input.status,
      pdfStorageKey: null,
      rubisEarned,
      notes: pickRandom(INVOICE_NOTES_POOL),
    },
    { client: input.trx }
  )
}

export type ActivityFactoryInput = {
  organizationId: string
  invoice: Invoice
  client: Client
  trx?: TransactionClientContract
}

/**
 * Pour chaque facture, génère les events réalistes :
 *  - invoice_imported (toujours, à issueDate)
 *  - relance_sent N fois si status in_relance/awaiting (entre issueDate et now)
 *  - invoice_paid si status paid
 */
export async function makeActivityForInvoice(
  input: ActivityFactoryInput
): Promise<void> {
  const { invoice, client, trx } = input

  // Import — toujours
  await ActivityEvent.create(
    {
      organizationId: input.organizationId,
      kind: 'invoice_imported',
      at: invoice.issueDate,
      label: `Facture <b>${invoice.numero}</b> importée`,
      meta: { invoiceId: invoice.id, clientId: client.id },
    },
    { client: trx }
  )

  if (invoice.status === 'in_relance' || invoice.status === 'awaiting_user_confirmation') {
    const relanceCount = randomInt(1, 3)
    for (let i = 0; i < relanceCount; i++) {
      const sentAt = invoice.dueDate.plus({ days: 3 + i * 7 })
      if (sentAt > DateTime.utc()) break
      await ActivityEvent.create(
        {
          organizationId: input.organizationId,
          kind: 'relance_sent',
          at: sentAt,
          label: `Relance J+${3 + i * 7} envoyée à <b>${client.name}</b>`,
          meta: {
            invoiceId: invoice.id,
            clientId: client.id,
            planStepOrder: i,
          },
        },
        { client: trx }
      )
    }
  }

  if (invoice.status === 'paid' && invoice.paidAt) {
    await ActivityEvent.create(
      {
        organizationId: input.organizationId,
        kind: 'invoice_paid',
        at: invoice.paidAt,
        label: `<b>${client.name}</b> a réglé ${invoice.numero}`,
        meta: { invoiceId: invoice.id, clientId: client.id },
      },
      { client: trx }
    )
  }
}

// ---------------------------------------------------------------------------
// Recettes — combine les factories pour produire une org démo cohérente
// ---------------------------------------------------------------------------

export type DemoSeedConfig = {
  organizationId: string
  /** Plans déjà provisionnés dans l'org (pour piocher des planId). */
  plans: Plan[]
  trx: TransactionClientContract
  /** Combien de clients (1..N templates dispo). Défaut 8. */
  clientCount?: number
}

export type DemoSeedResult = {
  clients: Client[]
  invoices: Invoice[]
  rubisEarned: number
}

/**
 * Mix de statuts représentatif d'une TPE active :
 *  - 5 paid (DSO calc + encaissé total)
 *  - 4 in_relance (à voir dans le funnel "en relance")
 *  - 2 awaiting_user_confirmation (check-in en attente)
 *  - 3 pending (récentes, pas encore relancées)
 *  - 1 litigation (cas tendu)
 */
const INVOICE_RECIPE: Array<{ status: InvoiceStatus; issueOffsetDays: number; planIdx?: number }> = [
  // Paid — réparties sur 6 mois pour faire vivre le DSO
  { status: 'paid', issueOffsetDays: -180 },
  { status: 'paid', issueOffsetDays: -135 },
  { status: 'paid', issueOffsetDays: -95 },
  { status: 'paid', issueOffsetDays: -65 },
  { status: 'paid', issueOffsetDays: -40 },
  // En relance — échéances passées récentes
  { status: 'in_relance', issueOffsetDays: -55 },
  { status: 'in_relance', issueOffsetDays: -50 },
  { status: 'in_relance', issueOffsetDays: -42 },
  { status: 'in_relance', issueOffsetDays: -38 },
  // Awaiting check-in — échéance toute fraîche
  { status: 'awaiting_user_confirmation', issueOffsetDays: -32 },
  { status: 'awaiting_user_confirmation', issueOffsetDays: -30 },
  // Pending — récentes, pas encore arrivées à échéance
  { status: 'pending', issueOffsetDays: -10 },
  { status: 'pending', issueOffsetDays: -5 },
  { status: 'pending', issueOffsetDays: -2 },
  // Litigation — ancienne, contestée
  { status: 'litigation', issueOffsetDays: -90 },
]

export async function seedDemoOrg(config: DemoSeedConfig): Promise<DemoSeedResult> {
  const { organizationId, plans, trx } = config
  const clientCount = Math.min(config.clientCount ?? 8, CLIENT_TEMPLATES.length)

  // Crée les clients
  const clients: Client[] = []
  for (let i = 0; i < clientCount; i++) {
    clients.push(await makeClient({ organizationId, index: i, trx }))
  }

  // Crée les factures (round-robin sur les clients + plans)
  const invoices: Invoice[] = []
  for (const [i, recipe] of INVOICE_RECIPE.entries()) {
    const client = clients[i % clients.length]!
    const plan = plans[i % plans.length] ?? null
    const invoice = await makeInvoice({
      organizationId,
      clientId: client.id,
      planId: plan?.id ?? null,
      status: recipe.status,
      issueOffsetDays: recipe.issueOffsetDays,
      trx,
    })
    invoices.push(invoice)
    await makeActivityForInvoice({
      organizationId,
      invoice,
      client,
      trx,
    })
  }

  const rubisEarned = invoices.reduce((s, inv) => s + inv.rubisEarned, 0)
  return { clients, invoices, rubisEarned }
}

// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------

function randomInt(min: number, max: number): number {
  return Math.floor(Math.random() * (max - min + 1)) + min
}

function pickRandom<T>(arr: readonly T[]): T {
  return arr[Math.floor(Math.random() * arr.length)]!
}

// Marque l'export de randomUUID utilisée si on en a besoin ailleurs.
export { randomUUID }