import {
  Controller,
  Get,
  Post,
  Body,
  Query,
  Put,
  Delete,
  Param,
  UseGuards,
  Req,
} from "@nestjs/common";
import { FlashcardsService } from "./flashcards.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 { ReviewCardDto } from "./dto/review-card.dto";
import { CreateFlashcardDto } from "./dto/create-flashcard.dto";
import { UpdateFlashcardDto } from "./dto/update-flashcard.dto";

@ApiTags("Spaced Repetition Flashcards")
@Controller("flashcards")
@UseGuards(JwtAuthGuard, RolesGuard)
@ApiBearerAuth()
export class FlashcardsController {
  constructor(private flashcardsService: FlashcardsService) {}

  @Get("due")
  @ApiOperation({ summary: "Retrieve due flashcards for study" })
  async getDueFlashcards(
    @Query("courseId") courseId?: string,
    @Req() req?: any,
  ) {
    return this.flashcardsService.getDueFlashcards(req.user.id, courseId);
  }

  @Post("review")
  @ApiOperation({
    summary: "Submit review scores to update spaced repetition times",
  })
  async recordReviewScore(@Body() dto: ReviewCardDto, @Req() req: any) {
    return this.flashcardsService.recordReviewScore(
      req.user.id,
      dto.flashcardId,
      dto.ease,
    );
  }

  @Post()
  @Roles("admin")
  @ApiOperation({ summary: "Create a new flashcard (Admin)" })
  async createFlashcard(@Body() dto: CreateFlashcardDto) {
    return this.flashcardsService.create(dto);
  }

  @Get()
  @ApiOperation({ summary: "List all flashcards" })
  async getFlashcards(@Query("nodeId") nodeId?: string) {
    return this.flashcardsService.findAll(nodeId);
  }

  @Get(":id")
  @Roles("admin")
  @ApiOperation({ summary: "Get details of a single flashcard (Admin)" })
  async getFlashcardById(@Param("id") id: string) {
    return this.flashcardsService.findById(id);
  }

  @Put(":id")
  @Roles("admin")
  @ApiOperation({ summary: "Update a flashcard (Admin)" })
  async updateFlashcard(
    @Param("id") id: string,
    @Body() dto: UpdateFlashcardDto,
  ) {
    return this.flashcardsService.update(id, dto);
  }

  @Delete(":id")
  @Roles("admin")
  @ApiOperation({ summary: "Delete a flashcard (Admin)" })
  async deleteFlashcard(@Param("id") id: string) {
    return this.flashcardsService.remove(id);
  }

  @Post("nodes/:nodeId/bulk")
  @Roles("admin")
  @ApiOperation({
    summary: "Bulk import flashcards for a concept node (Admin)",
  })
  async bulkImport(
    @Param("nodeId") nodeId: string,
    @Body()
    dto: { flashcards: { question: string; answer: string; tag?: string }[] },
  ) {
    return this.flashcardsService.bulkImport(nodeId, dto.flashcards);
  }
}