import { Body, Controller, Get, Header, Param, Patch, Post, Query, Res, StreamableFile, UseGuards } from "@nestjs/common";
import type { Response } from "express";
import { ApiBearerAuth, ApiTags } from "@nestjs/swagger";
import { QuotesService } from "./quotes.service.js";
import { CreateQuoteDto } from "./dto/create-quote.dto.js";
import { UpdateQuoteDto } from "./dto/update-quote.dto.js";
import { DecideApprovalDto } from "./dto/decide-approval.dto.js";
import { CloseDealDto } from "./dto/close-deal.dto.js";
import { JwtAuthGuard } from "../auth/jwt-auth.guard.js";
import { PermissionGuard } from "../auth/permission.guard.js";
import { SuperAdminGuard } from "../auth/super-admin.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";

/**
 * Ofertas comerciais (eden.md módulo 2). Scope resolution (own/reseller/all)
 * happens in the service, driven by the actor's granted permission scope —
 * see QuotesService.list/get. Every write recomputes pricing server-side
 * (Master Prompt §6.4) — the client never supplies a trusted total.
 */
@ApiTags("quotes")
@ApiBearerAuth()
@UseGuards(JwtAuthGuard, PermissionGuard)
@Controller("v1/quotes")
export class QuotesController {
  constructor(private readonly quotes: QuotesService) {}

  @Get()
  @RequirePermission("quotes", "view")
  list(@CurrentUser() user: EdenAuthenticatedUser, @Query("dealStatus") dealStatus?: string) {
    return this.quotes.list(user, dealStatus);
  }

  @Get(":id")
  @RequirePermission("quotes", "view")
  get(@Param("id") id: string, @CurrentUser() user: EdenAuthenticatedUser) {
    return this.quotes.get(id, user);
  }

  @Post()
  @RequirePermission("quotes", "edit")
  create(@Body() dto: CreateQuoteDto, @CurrentUser() user: EdenAuthenticatedUser) {
    return this.quotes.create(dto, user);
  }

  /** Anexo de conformidade ANATEL/RGC (Resolução 765/2023) — 400 se a oferta não tiver item STFC. Renderizado ao vivo, nunca cacheado (ver doc comment em QuotesService.generateAnatelPdf). */
  @Get(":id/anatel-pdf")
  @RequirePermission("quotes", "view")
  @Header("Content-Type", "application/pdf")
  async downloadAnatelPdf(
    @Param("id") id: string,
    @CurrentUser() user: EdenAuthenticatedUser,
    @Res({ passthrough: true }) res: Response,
  ) {
    const pdf = await this.quotes.generateAnatelPdf(id, user);
    res.set({ "Content-Disposition": `inline; filename="anatel-${id}.pdf"` });
    return new StreamableFile(pdf);
  }

  @Patch(":id")
  @RequirePermission("quotes", "edit")
  update(
    @Param("id") id: string,
    @Body() dto: UpdateQuoteDto,
    @CurrentUser() user: EdenAuthenticatedUser,
  ) {
    return this.quotes.update(id, dto, user);
  }

  /** Approve/reject a pending discount or reduced-fidelity exception — eden.md §3.3. Gated inside the service by canApproveDiscount(), not by a generic permission (mirrors the legacy's per-user flag, not a role-based permission). */
  @Patch(":id/approval")
  @RequirePermission("quotes", "approve")
  decideApproval(
    @Param("id") id: string,
    @Body() dto: DecideApprovalDto,
    @CurrentUser() user: EdenAuthenticatedUser,
  ) {
    return this.quotes.decideApproval(id, dto, user);
  }

  /** Closes the deal, locking the quote — eden.md §5.1/§6. */
  @Post(":id/close")
  @RequirePermission("quotes", "edit")
  closeDeal(
    @Param("id") id: string,
    @Body() dto: CloseDealDto,
    @CurrentUser() user: EdenAuthenticatedUser,
  ) {
    return this.quotes.closeDeal(id, dto, user);
  }

  /** super_admin-only shortcut, works even on a locked quote — eden.md §5.2. Route-level guard for defense in depth, on top of the service-layer check. */
  @Patch(":id/deal-status")
  @UseGuards(SuperAdminGuard)
  dealStatus(
    @Param("id") id: string,
    @Body("dealStatus") dealStatus: "orcamento" | "fechado" | "perdido",
    @CurrentUser() user: EdenAuthenticatedUser,
  ) {
    return this.quotes.changeDealStatus(id, dealStatus, user);
  }
}