import { Body, Controller, Get, Param, Patch, Post, Query, UseGuards } from "@nestjs/common";
import { ApiBearerAuth, ApiTags } from "@nestjs/swagger";
import { BillingService } from "./billing.service.js";
import { CreateBillingSubscriptionDto } from "./dto/create-billing-subscription.dto.js";
import { CreateBillingRunDto } from "./dto/create-billing-run.dto.js";
import { JwtAuthGuard } from "../auth/jwt-auth.guard.js";
import { PermissionGuard } from "../auth/permission.guard.js";
import { RequirePermission } from "../auth/decorators/require-permission.decorator.js";
import { CurrentUser } from "../auth/decorators/current-user.decorator.js";
import type { EdenAuthenticatedUser } from "../auth/jwt-auth.guard.js";
import type {
  BillingRunStatus,
  BillingSubscriptionStatus,
  InvoiceStatus,
} from "@eden/database";

/**
 * Billing — Master Prompt §6.10, ADR-0008. Recurring subscription ->
 * billing_run -> invoice MVP. Explicitly NOT Finance/AR-AP (títulos,
 * boletos, dunning) or Fiscal (documento fiscal) — see ADR-0008. See
 * billing.service.ts for the authorization rules (why run
 * creation/consolidation requires 'all' scope).
 */
@ApiTags("billing")
@ApiBearerAuth()
@UseGuards(JwtAuthGuard, PermissionGuard)
@Controller("v1/billing")
export class BillingController {
  constructor(private readonly billing: BillingService) {}

  @Get("subscriptions")
  @RequirePermission("billing", "view")
  listSubscriptions(
    @CurrentUser() user: EdenAuthenticatedUser,
    @Query("status") status?: BillingSubscriptionStatus,
  ) {
    return this.billing.listSubscriptions(user, status);
  }

  @Post("subscriptions")
  @RequirePermission("billing", "edit")
  createSubscription(
    @Body() dto: CreateBillingSubscriptionDto,
    @CurrentUser() user: EdenAuthenticatedUser,
  ) {
    return this.billing.createSubscription(dto, user);
  }

  @Patch("subscriptions/:id/cancel")
  @RequirePermission("billing", "edit")
  cancelSubscription(@Param("id") id: string, @CurrentUser() user: EdenAuthenticatedUser) {
    return this.billing.cancelSubscription(id, user);
  }

  @Post("runs")
  @RequirePermission("billing", "edit")
  createRun(@Body() dto: CreateBillingRunDto, @CurrentUser() user: EdenAuthenticatedUser) {
    return this.billing.createOrRegenerateRun(dto, user);
  }

  @Get("runs")
  @RequirePermission("billing", "view")
  listRuns(
    @CurrentUser() user: EdenAuthenticatedUser,
    @Query("referenceYear") referenceYear?: string,
    @Query("referenceMonth") referenceMonth?: string,
    @Query("status") status?: BillingRunStatus,
  ) {
    return this.billing.listRuns(user, {
      referenceYear: referenceYear != null ? Number(referenceYear) : undefined,
      referenceMonth: referenceMonth != null ? Number(referenceMonth) : undefined,
      status,
    });
  }

  @Get("runs/:id")
  @RequirePermission("billing", "view")
  getRun(@Param("id") id: string, @CurrentUser() user: EdenAuthenticatedUser) {
    return this.billing.getRun(id, user);
  }

  @Post("runs/:id/consolidate")
  @RequirePermission("billing", "edit")
  consolidateRun(@Param("id") id: string, @CurrentUser() user: EdenAuthenticatedUser) {
    return this.billing.consolidateRun(id, user);
  }

  @Get("invoices")
  @RequirePermission("billing", "view")
  listInvoices(
    @CurrentUser() user: EdenAuthenticatedUser,
    @Query("status") status?: InvoiceStatus,
    @Query("referenceYear") referenceYear?: string,
    @Query("referenceMonth") referenceMonth?: string,
    @Query("resellerId") resellerId?: string,
  ) {
    return this.billing.listInvoices(user, {
      status,
      referenceYear: referenceYear != null ? Number(referenceYear) : undefined,
      referenceMonth: referenceMonth != null ? Number(referenceMonth) : undefined,
      resellerId,
    });
  }
}