/**
 * ════════════════════════════════════════════════════════════
 * مُصادَق (Musadaq) — Invoices Controller / متحكم الفواتير
 * ════════════════════════════════════════════════════════════
 * Handles HTTP requests related to invoice management.
 * يتعامل مع طلبات HTTP المتعلقة بإدارة الفواتير.
 * ════════════════════════════════════════════════════════════
 */

import {
  Controller,
  Get,
  Post,
  Patch,
  Body,
  Param,
  UseGuards,
  UploadedFile,
  UseInterceptors,
  ParseUUIDPipe,
  Res,
} from '@nestjs/common';
import { Response } from 'express';
import { FileInterceptor } from '@nestjs/platform-express';
import { InvoicesService } from './invoice.service';
import { JwtAuthGuard } from '../../common/guards/jwt-auth.guard';
import { RolesGuard } from '../../common/guards/roles.guard';
import { Roles } from '../../common/decorators/roles.decorator';
import { UserRole } from '../users/enums/role.enum';
import { CurrentUser } from '../../common/decorators/current-user.decorator';

@Controller('invoices')
@UseGuards(JwtAuthGuard, RolesGuard)
export class InvoicesController {
  constructor(private invoicesService: InvoicesService) {}
  
  /**
   * قائمة جميع الفواتير للمكتب
   * List all invoices for the entire accounting office (tenant)
   */
  @Get()
  async findAllByTenant(@CurrentUser() user: any) {
    return this.invoicesService.findAllByTenant(user);
  }

  /**
   * رفع فاتورة لشركة محددة
   * Upload an invoice file for a specific company
   */
  @Post('upload/:companyId')
  @Roles(UserRole.ADMIN, UserRole.ACCOUNTANT, UserRole.SUPER_ADMIN)
  @UseInterceptors(FileInterceptor('file'))
  async upload(
    @CurrentUser() user: any,
    @Param('companyId', ParseUUIDPipe) companyId: string,
    @UploadedFile() file: Express.Multer.File,
  ) {
    return this.invoicesService.upload(user, companyId, file);
  }

  /**
   * قائمة الفواتير لشركة محددة
   * List all invoices for a specific company
   */
  @Get('company/:companyId')
  async findAll(
    @CurrentUser() user: any,
    @Param('companyId', ParseUUIDPipe) companyId: string,
  ) {
    return this.invoicesService.findAll(user, companyId);
  }

  /**
   * تفاصيل فاتورة محددة
   * Get details of a specific invoice
   */
  @Get(':id')
  async findOne(
    @CurrentUser() user: any,
    @Param('id', ParseUUIDPipe) id: string,
  ) {
    return this.invoicesService.findOne(user, id);
  }

  /**
   * تحديث بيانات الفاتورة يدوياً
   */
  /**
   * إرسال الفاتورة إلى بوابة جو فوترة الحكومية
   * Submit an invoice to the official JoFotara portal
   */
  @Post(':id/submit')
  @Roles(UserRole.ADMIN, UserRole.ACCOUNTANT, UserRole.SUPER_ADMIN)
  async submit(@CurrentUser() user: any, @Param('id', ParseUUIDPipe) id: string) {
    return this.invoicesService.submitToJoFotara(user, id);
  }

  /**
   * حذف الفاتورة نهائياً
   * Permanently delete an invoice
   */
  @Post(':id/delete') // Using POST for delete to match frontend request style or use standard DELETE
  @Roles(UserRole.ADMIN, UserRole.ACCOUNTANT, UserRole.SUPER_ADMIN)
  async remove(@CurrentUser() user: any, @Param('id', ParseUUIDPipe) id: string) {
    return this.invoicesService.remove(user, id);
  }

  /**
   * الحصول على الملف الأصلي للفاتورة
   * Download/Stream the original invoice file
   */
  @Get(':id/file')
  async getFile(
    @CurrentUser() user: any,
    @Param('id', ParseUUIDPipe) id: string,
    @Res({ passthrough: true }) res: Response,
  ) {
    const streamableFile = await this.invoicesService.getFile(user, id);
    
    // We need to determine the content type to ensure it opens inline in the browser (iframe)
    // We can fetch the invoice details first to get the extension.
    const invoice = await this.invoicesService.findOne(user, id);
    let mimeType = 'application/pdf'; // Default fallback
    if (invoice.original_file_path) {
      const ext = invoice.original_file_path.split('.').pop()?.toLowerCase();
      if (ext === 'jpg' || ext === 'jpeg') mimeType = 'image/jpeg';
      else if (ext === 'png') mimeType = 'image/png';
    }

    res.set({
      'Content-Type': mimeType,
      'Content-Disposition': 'inline', // This forces the browser to display it instead of downloading
    });

    return streamableFile;
  }
}