import {
  Controller,
  Get,
  Post,
  Patch,
  Delete,
  Param,
  Body,
  Query,
  Req,
  UseInterceptors,
  UploadedFiles,
  Res,
} from '@nestjs/common';
import { Request, Response } from 'express';
import { FilesInterceptor } from '@nestjs/platform-express';
import { SupportService } from './support.service';
import { UpdateTicketDto } from './dto/update-ticket.dto';
import { CommentDto } from './dto/comment.dto';
import { TicketListQueryDto } from './dto/list-query.dto';
import { supportUploadOptions } from './multer-options';
import { createReadStream } from 'fs';

@Controller('support/tickets')
export class SupportController {
  constructor(private readonly service: SupportService) {}

  @Get()
  findAll(@Query() query: TicketListQueryDto) {
    return this.service.findAll(query);
  }

  @Get('uploads/:fileName')
  async downloadFile(
    @Param('fileName') fileName: string,
    @Res() res: Response,
  ) {
    const { filePath, attachment } = await this.service.getAttachment(fileName);
    res.setHeader('Content-Type', attachment.mimeType);
    res.setHeader(
      'Content-Disposition',
      `inline; filename="${attachment.originalName}"`,
    );
    createReadStream(filePath).pipe(res);
  }

  @Get(':id')
  findOne(@Param('id') id: string) {
    return this.service.findOne(id);
  }

  @Patch(':id')
  update(@Param('id') id: string, @Body() dto: UpdateTicketDto) {
    return this.service.update(id, dto);
  }

  @Patch(':id/assign')
  assign(@Param('id') id: string, @Body() body: { adminId: string }) {
    return this.service.assign(id, body.adminId);
  }

  @Patch(':id/resolve')
  resolve(@Param('id') id: string) {
    return this.service.resolve(id);
  }

  @Patch(':id/close')
  close(@Param('id') id: string) {
    return this.service.close(id);
  }

  @Post(':id/comments')
  addComment(
    @Param('id') id: string,
    @Body() dto: CommentDto,
    @Req() req: Request & { admin: any },
  ) {
    const admin = req.admin;
    return this.service.addComment(
      id,
      admin.sub,
      `${admin.firstName || ''} ${admin.lastName || ''}`.trim(),
      'super_admin',
      dto,
    );
  }

  // ─── Attachments ────────────────────────────────

  @Post(':id/attachments')
  @UseInterceptors(FilesInterceptor('files', 5, supportUploadOptions))
  async uploadAttachments(
    @Param('id') id: string,
    @UploadedFiles() files: Express.Multer.File[],
    @Body() body: { commentId?: string },
    @Req() req: Request & { admin: any },
  ) {
    const admin = req.admin;
    const results = await Promise.all(
      files.map((f) =>
        this.service.addAttachment(id, f, admin.sub, body.commentId),
      ),
    );
    return results;
  }

  @Get(':id/attachments')
  getAttachments(@Param('id') id: string) {
    return this.service.getAttachments(id);
  }

  @Delete(':id/attachments/:attachmentId')
  deleteAttachment(
    @Param('id') id: string,
    @Param('attachmentId') attachmentId: string,
  ) {
    return this.service.deleteAttachment(id, attachmentId);
  }
}