rubis/apps/api/app/controllers/invoices_controller.ts

import Invoice from '#models/invoice'
import Client from '#models/client'
import Plan from '#models/plan'
import InvoiceTransformer from '#transformers/invoice_transformer'
import {
  createInvoiceValidator,
  listInvoicesValidator,
} from '#validators/invoice'
import type { HttpContext } from '@adonisjs/core/http'
import { Exception } from '@adonisjs/core/exceptions'
import db from '@adonisjs/lucid/services/db'
import { DateTime } from 'luxon'
import type { TransactionClientContract } from '@adonisjs/lucid/types/database'

const PAGE_SIZE = 50

// Priorité d'affichage côté liste : ce qui est actionnable d'abord.
const STATUS_PRIORITY: Record<string, number> = {
  awaiting_user_confirmation: 0,
  in_relance: 1,
  pending: 2,
  litigation: 3,
  paid: 4,
  cancelled: 5,
}

function requireOrgId(auth: HttpContext['auth']): string {
  const user = auth.getUserOrFail()
  if (!user.organizationId) {
    throw new Exception('Aucune organisation rattachée', { status: 404, code: 'not_found' })
  }
  return user.organizationId
}

function serializeInvoice(i: Invoice) {
  return new InvoiceTransformer(i).toObject()
}

/**
 * Résolution client à la création de facture.
 *
 * Priorité :
 *  1. clientId fourni → utilise tel quel (combobox a sélectionné une fiche).
 *  2. match par nom (case-insensitive) sur les clients existants.
 *  3. création à la volée → email REQUIS (sans email pas de relance possible).
 */
async function resolveClient(
  organizationId: string,
  fields: {
    clientId?: string
    clientName: string
    clientEmail?: string | null
  },
  trx: TransactionClientContract
): Promise<Client | { errorCode: 'client_email_required' }> {
  if (fields.clientId) {
    const c = await Client.query({ client: trx })
      .where('organization_id', organizationId)
      .where('id', fields.clientId)
      .first()
    if (c) return c
  }

  const matched = await Client.query({ client: trx })
    .where('organization_id', organizationId)
    .whereILike('name', fields.clientName)
    .first()
  if (matched) return matched

  // Création à la volée : email obligatoire.
  if (!fields.clientEmail) {
    return { errorCode: 'client_email_required' }
  }

  return Client.create(
    {
      organizationId,
      name: fields.clientName,
      email: fields.clientEmail,
      phone: null,
      address: null,
      siret: null,
      notes: null,
    },
    { client: trx }
  )
}

/**
 * Construit la timeline d'une facture en composant les étapes du plan
 * avec l'état courant (V1 simplifié — les RelanceTask viendront plus tard).
 *
 *  - étapes dont sendDay <= aujourd'hui : 'past' (envoyées)
 *  - étape actuelle (la prochaine future) : 'current'
 *  - étapes futures : 'future'
 */
function buildTimeline(invoice: Invoice): Array<{
  id: string
  state: 'past' | 'current' | 'future'
  when: string
  what: string
}> {
  const events: Array<{
    id: string
    state: 'past' | 'current' | 'future'
    when: string
    what: string
  }> = [
    {
      id: `${invoice.id}__issued`,
      state: 'past',
      when: `${formatShortDate(invoice.issueDate)} · facture émise`,
      what: 'Importée',
    },
  ]

  if (
    invoice.plan?.steps?.length &&
    invoice.status !== 'paid' &&
    invoice.status !== 'cancelled'
  ) {
    const dueMs = invoice.dueDate.toMillis()
    const nowMs = DateTime.now().toMillis()
    let currentSet = false

    for (const step of invoice.plan.steps.slice().sort((a, b) => a.order - b.order)) {
      const sendMs = dueMs + step.offsetDays * 24 * 60 * 60 * 1000
      const stepDate = DateTime.fromMillis(sendMs)
      const labelStep = `J${step.offsetDays >= 0 ? '+' : ''}${step.offsetDays} — Étape ${step.order + 1}`

      let state: 'past' | 'current' | 'future'
      if (sendMs < nowMs) state = 'past'
      else if (!currentSet) {
        state = 'current'
        currentSet = true
      } else state = 'future'

      events.push({
        id: `${invoice.id}__step_${step.order}`,
        state,
        when: `${formatShortDate(stepDate)} · ${labelStep}`,
        what:
          state === 'past'
            ? `Email envoyé · "${step.subject.replace('{{numero}}', invoice.numero)}"`
            : `Email programmé · "${step.subject.replace('{{numero}}', invoice.numero)}"`,
      })
    }
  }

  if (invoice.status === 'paid' && invoice.paidAt) {
    events.push({
      id: `${invoice.id}__paid`,
      state: 'past',
      when: `${formatShortDate(invoice.paidAt)} · facture encaissée`,
      what: 'Marquée encaissée — relances stoppées',
    })
  }

  return events
}

function formatShortDate(d: DateTime): string {
  return d.toFormat('dd/LL/yyyy')
}

export default class InvoicesController {
  /**
   * GET /invoices?status=&q=&clientId=&page=
   */
  async index({ auth, request, response }: HttpContext) {
    const organizationId = requireOrgId(auth)
    const filters = await request.validateUsing(listInvoicesValidator)

    const query = Invoice.query()
      .where('organization_id', organizationId)
      .preload('client')
      .preload('plan')

    if (filters.status && filters.status !== 'all') {
      query.where('status', filters.status)
    }
    if (filters.clientId) {
      query.where('client_id', filters.clientId)
    }
    if (filters.q) {
      const q = filters.q.toLowerCase()
      query.where((b) => {
        b.whereILike('numero', `%${q}%`).orWhereExists((sub) => {
          sub
            .from('clients')
            .whereColumn('clients.id', 'invoices.client_id')
            .whereILike('clients.name', `%${q}%`)
        })
      })
    }

    const invoices = await query.exec()

    // Tri : actionnable d'abord (status priority), puis échéance croissante.
    invoices.sort((a, b) => {
      const dp = (STATUS_PRIORITY[a.status] ?? 99) - (STATUS_PRIORITY[b.status] ?? 99)
      if (dp !== 0) return dp
      return a.dueDate.toMillis() - b.dueDate.toMillis()
    })

    // Pagination simple en V1 (cf. backend.md §6 — cursor-based plus tard).
    const page = filters.page ?? 1
    const total = invoices.length
    const sliced = invoices.slice((page - 1) * PAGE_SIZE, page * PAGE_SIZE)

    return response.json({
      data: sliced.map(serializeInvoice),
      meta: { total, page },
    })
  }

  /**
   * GET /invoices/counts — compteurs par statut pour les chips dashboard.
   */
  async counts({ auth, response }: HttpContext) {
    const organizationId = requireOrgId(auth)

    const rows = await db
      .from('invoices')
      .where('organization_id', organizationId)
      .select('status')
      .count('* as count')
      .groupBy('status')

    const counts = {
      all: 0,
      pending: 0,
      in_relance: 0,
      awaiting_user_confirmation: 0,
      paid: 0,
      litigation: 0,
      cancelled: 0,
    }
    for (const r of rows) {
      const c = Number(r.count)
      counts.all += c
      const s = r.status as keyof typeof counts
      if (s in counts) counts[s] = c
    }

    return response.json({ data: counts })
  }

  /**
   * GET /invoices/:id — détail enrichi (client + plan + timeline).
   */
  async show({ auth, params, response }: HttpContext) {
    const organizationId = requireOrgId(auth)

    const invoice = await Invoice.query()
      .where('organization_id', organizationId)
      .where('id', params.id)
      .preload('client')
      .preload('plan', (q) => q.preload('steps'))
      .first()

    if (!invoice) {
      throw new Exception('Facture introuvable', { status: 404, code: 'not_found' })
    }

    const data = serializeInvoice(invoice)
    return response.json({
      data: {
        ...data,
        client: invoice.client && {
          id: invoice.client.id,
          name: invoice.client.name,
          email: invoice.client.email,
          phone: invoice.client.phone,
          address: invoice.client.address,
          siret: invoice.client.siret,
        },
        plan: invoice.plan && {
          id: invoice.plan.id,
          slug: invoice.plan.slug,
          name: invoice.plan.name,
          steps: (invoice.plan.steps ?? [])
            .slice()
            .sort((a, b) => a.order - b.order)
            .map((s) => ({
              id: s.id,
              order: s.order,
              offsetDays: s.offsetDays,
              tone: s.tone,
              subject: s.subject,
              body: s.body,
              requiresManualValidation: s.requiresManualValidation,
            })),
        },
        timeline: buildTimeline(invoice),
      },
    })
  }

  /**
   * POST /invoices — saisie manuelle.
   */
  async store({ auth, request, response }: HttpContext) {
    const organizationId = requireOrgId(auth)
    const fields = await request.validateUsing(createInvoiceValidator)

    const invoice = await db.transaction(async (trx) => {
      const clientOrError = await resolveClient(organizationId, fields, trx)
      if ('errorCode' in clientOrError) {
        // Throw with explicit shape pour l'exception handler
        throw new Exception(
          'Email du client requis — Rubis en a besoin pour envoyer les relances.',
          { status: 422, code: clientOrError.errorCode }
        )
      }
      const client = clientOrError

      // Vérification plan (s'il est fourni, doit appartenir à l'org).
      let planId: string | null = null
      if (fields.planId) {
        const plan = await Plan.query({ client: trx })
          .where('organization_id', organizationId)
          .where('id', fields.planId)
          .first()
        if (plan) planId = plan.id
      }

      return Invoice.create(
        {
          organizationId,
          clientId: client.id,
          planId,
          numero: fields.numero,
          amountTtcCents: fields.amountTtcCents,
          issueDate: DateTime.fromISO(fields.issueDate),
          dueDate: DateTime.fromISO(fields.dueDate),
          status: 'pending',
          rubisEarned: 1, // bonus saisie initiale (cf. CLAUDE.md → glossaire)
          pdfStorageKey: null,
          notes: null,
          paidAt: null,
        },
        { client: trx }
      )
    })

    await invoice.load('client')
    await invoice.load('plan')

    return response.status(201).json({ data: serializeInvoice(invoice) })
  }

  /**
   * POST /invoices/:id/mark-paid
   * Marque encaissée + bonus +1 rubis (à la fois sur invoice.rubisEarned
   * et sur organization.rubisCount).
   */
  async markPaid({ auth, params, response }: HttpContext) {
    const organizationId = requireOrgId(auth)

    const invoice = await Invoice.query()
      .where('organization_id', organizationId)
      .where('id', params.id)
      .preload('client')
      .preload('plan')
      .first()

    if (!invoice) {
      throw new Exception('Facture introuvable', { status: 404, code: 'not_found' })
    }
    if (invoice.status === 'paid') {
      // Idempotent : déjà payée, on renvoie l'état courant sans bumper.
      return response.json({ data: serializeInvoice(invoice) })
    }

    await db.transaction(async (trx) => {
      invoice.useTransaction(trx)
      invoice.status = 'paid'
      invoice.paidAt = DateTime.now()
      invoice.rubisEarned = invoice.rubisEarned + 1
      await invoice.save()

      // Bump du compteur agrégé sur l'organisation
      await trx
        .from('organizations')
        .where('id', organizationId)
        .increment('rubis_count', 1)
    })

    return response.json({ data: serializeInvoice(invoice) })
  }
}