import {
  Controller,
  Get,
  Post,
  Put,
  Delete,
  Param,
  Body,
  UseGuards,
  ParseIntPipe,
  Query,
} from '@nestjs/common';
import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard';
import { Permissions } from '../auth/permissions.decorator';
import { PermissionsGuard } from '../auth/guards/permissions.guard';
import { LessonsService } from './lessons.service';
import { CreateLessonDto } from './dto/create-lesson.dto';
import { UpdateLessonDto } from './dto/update-lesson.dto';
import { ReorderDto } from '../common/dto/reorder.dto';

@Controller('api/v1/admin/lessons')
@UseGuards(JwtAuthGuard, PermissionsGuard)
export class LessonsController {
  constructor(private readonly lessonsService: LessonsService) {}

  @Post()
  @Permissions('lesson.create')
  async create(@Body() dto: CreateLessonDto) {
    const lesson = await this.lessonsService.create(dto);
    return { success: true, data: lesson };
  }

  @Get()
  @Permissions('lesson.view')
  async findByModule(@Query('moduleId', ParseIntPipe) moduleId: number) {
    const lessons = await this.lessonsService.findByModule(moduleId);
    return { success: true, data: lessons };
  }

  @Get(':id')
  @Permissions('lesson.view')
  async findById(@Param('id', ParseIntPipe) id: number) {
    const lesson = await this.lessonsService.findById(id);
    if (!lesson) {
      return { success: false, message: 'Lesson not found' };
    }
    return { success: true, data: lesson };
  }

  @Put(':id')
  @Permissions('lesson.update')
  async update(
    @Param('id', ParseIntPipe) id: number,
    @Body() dto: UpdateLessonDto,
  ) {
    const lesson = await this.lessonsService.update(id, dto);
    if (!lesson) {
      return { success: false, message: 'Lesson not found' };
    }
    return { success: true, data: lesson };
  }

  @Post('reorder')
  @Permissions('lesson.update')
  async reorder(@Body() dto: ReorderDto) {
    await this.lessonsService.reorder(dto.items);
    return { success: true, message: 'Lessons reordered' };
  }

  @Post(':id/publish')
  @Permissions('lesson.publish')
  async publish(@Param('id', ParseIntPipe) id: number) {
    const lesson = await this.lessonsService.setStatus(id, 'PUBLISHED');
    if (!lesson) return { success: false, message: 'Lesson not found' };
    return { success: true, message: 'Lesson published', data: lesson };
  }

  @Post(':id/archive')
  @Permissions('lesson.publish')
  async archive(@Param('id', ParseIntPipe) id: number) {
    const lesson = await this.lessonsService.setStatus(id, 'ARCHIVED');
    if (!lesson) return { success: false, message: 'Lesson not found' };
    return { success: true, message: 'Lesson archived', data: lesson };
  }

  @Delete(':id')
  @Permissions('lesson.delete')
  async delete(@Param('id', ParseIntPipe) id: number) {
    const success = await this.lessonsService.delete(id);
    return { success, message: success ? 'Lesson deleted' : 'Lesson not found' };
  }
}