import {
  Controller,
  Get,
  Post,
  Body,
  Param,
  Query,
  Put,
  Delete,
  UseGuards,
} from "@nestjs/common";
import { CoursesService } from "./courses.service";
import { ApiTags, ApiOperation, ApiBearerAuth } from "@nestjs/swagger";
import { JwtAuthGuard } from "../auth/jwt-auth.guard";
import { RolesGuard } from "../auth/roles.guard";
import { Roles } from "../auth/roles.decorator";
import { CreateChapterDto } from "./dto/create-chapter.dto";
import { UpdateChapterDto } from "./dto/update-chapter.dto";

@ApiTags("Courses & Roadmaps")
@Controller("chapters")
@UseGuards(JwtAuthGuard, RolesGuard)
@ApiBearerAuth()
export class ChaptersController {
  constructor(private coursesService: CoursesService) {}

  @Post()
  @Roles("admin")
  @ApiOperation({ summary: "Create a new chapter (Admin)" })
  async createChapter(@Body() dto: CreateChapterDto) {
    return this.coursesService.createChapter(
      dto.title,
      dto.orderIndex,
      dto.courseId,
      dto.parentChapterId,
    );
  }

  @Get()
  @ApiOperation({ summary: "List all chapters" })
  async getChapters(@Query("courseId") courseId?: string) {
    return this.coursesService.getChapters(courseId);
  }

  @Get(":id")
  @Roles("admin")
  @ApiOperation({ summary: "Get single chapter details (Admin)" })
  async getChapterById(@Param("id") id: string) {
    return this.coursesService.getChapterById(id);
  }

  @Put(":id")
  @Roles("admin")
  @ApiOperation({ summary: "Update a chapter (Admin)" })
  async updateChapter(@Param("id") id: string, @Body() dto: UpdateChapterDto) {
    return this.coursesService.updateChapter(
      id,
      dto.title,
      dto.orderIndex,
      dto.parentChapterId,
    );
  }

  @Delete(":id")
  @Roles("admin")
  @ApiOperation({ summary: "Delete a chapter (Admin)" })
  async deleteChapter(@Param("id") id: string) {
    return this.coursesService.deleteChapter(id);
  }
}