import {
  Controller,
  Get,
  Post,
  Put,
  Delete,
  Body,
  Param,
  Query,
  ValidationPipe,
  Res,
  Logger,
  Headers,
} from '@nestjs/common';
import type { Response as ExpressResponse } from 'express';
import { LiveBlogService } from './live-blog.service';
import {
  CreateLiveBlogDto,
  UpdateLiveBlogDto,
  FindLiveBlogsDto,
  CreateLiveBlogUpdateDto,
  UpdateLiveBlogUpdateDto,
} from './articles.dto';

@Controller('live-blogs')
export class LiveBlogController {
  private readonly logger = new Logger(LiveBlogController.name);

  constructor(private readonly liveBlogService: LiveBlogService) {}

  // Live Blog CRUD operations
  @Get('featured')
  getFeatured() {
    this.logger.log('GET /featured called');
    return this.liveBlogService.findPinned();
  }

  @Get('active')
  getActive() {
    return this.liveBlogService.findActive();
  }

  @Get('recent')
  getRecent() {
    return this.liveBlogService.getLiveBlogsWithRecentUpdates();
  }

  @Post()
  create(
    @Body(new ValidationPipe({ transform: true })) dto: CreateLiveBlogDto,
  ) {
    return this.liveBlogService.create(dto);
  }

  @Get()
  findAll(
    @Query(new ValidationPipe({ transform: true })) dto: FindLiveBlogsDto,
  ) {
    return this.liveBlogService.findAll(dto);
  }

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

  @Get('slug/:slug')
  findBySlug(@Param('slug') slug: string) {
    return this.liveBlogService.findBySlug(slug);
  }

  @Put(':id')
  update(
    @Param('id') id: string,
    @Body(new ValidationPipe({ transform: true })) dto: UpdateLiveBlogDto,
  ) {
    return this.liveBlogService.update(id, dto);
  }

  @Delete(':id')
  remove(@Param('id') id: string) {
    return this.liveBlogService.remove(id);
  }

  // Live Blog Updates CRUD operations
  @Post(':id/updates')
  createUpdate(
    @Param('id') liveBlogId: string,
    @Body(new ValidationPipe({ transform: true })) dto: CreateLiveBlogUpdateDto,
  ) {
    return this.liveBlogService.createUpdate(dto, liveBlogId);
  }

  @Get(':id/updates')
  findUpdates(
    @Param('id') liveBlogId: string,
    @Query('page') page = 1,
    @Query('limit') limit = 50,
  ) {
    return this.liveBlogService.findUpdates(
      liveBlogId,
      parseInt(page.toString()),
      parseInt(limit.toString()),
    );
  }

  @Put(':id/updates/:updateId')
  updateUpdate(
    @Param('id') liveBlogId: string,
    @Param('updateId') updateId: string,
    @Body(new ValidationPipe({ transform: true })) dto: UpdateLiveBlogUpdateDto,
  ) {
    return this.liveBlogService.updateUpdate(liveBlogId, updateId, dto);
  }

  @Delete(':id/updates/:updateId')
  removeUpdate(
    @Param('id') liveBlogId: string,
    @Param('updateId') updateId: string,
  ) {
    return this.liveBlogService.removeUpdate(liveBlogId, updateId);
  }

  // SSE endpoint for real-time updates
  @Get(':id/stream')
  stream(
    @Param('id') liveBlogId: string,
    @Res() response: ExpressResponse,
    @Headers('last-event-id') lastEventId?: string,
  ) {
    this.logger.log(`SSE connection request for live blog ${liveBlogId}`);

    if (lastEventId) {
      this.logger.log(`Client resuming with last event ID: ${lastEventId}`);
    }

    this.liveBlogService.createStream(liveBlogId, response);
  }
}