import {
  Controller,
  Get,
  Post,
  Put,
  Delete,
  Body,
  Param,
  Query,
  Res,
  Req,
  HttpStatus,
  HttpCode,
  UseGuards,
  ParseIntPipe,
} from '@nestjs/common';
import { Response } from 'express';
import {
  ApiTags,
  ApiOperation,
  ApiResponse,
  ApiQuery,
  ApiBearerAuth,
  ApiSecurity,
  ApiParam,
} from '@nestjs/swagger';
import { TemplateQuestionService } from './template-question.service';
import { CreateTemplateQuestionDto } from './dto/create-template-question.dto';
import { UpdateTemplateQuestionDto } from './dto/update-template-question.dto';
import { FilterTemplateQuestionDto } from './dto/filter-template-question.dto';
import { CloneQuestionsDto } from './dto/clone-questions.dto';
import { ResponseService } from 'src/common/response-handling/response-handler';
import { Roles } from 'src/common/decorators/roles.decorator';
import { RolesGuard } from 'src/common/guards/roles.guard';
import { AppLoggerService } from 'src/common/services/logger.service';
import { handleControllerError } from 'src/common/utils/controller-response-handling';
import { CombinedAuthGuard } from 'src/auth/combined-auth.guard';
import { ROLE_VALUES } from 'src/common/constants/strings-constants';

@ApiTags('template-question')
@Controller('v1/template-questions')
@UseGuards(CombinedAuthGuard, RolesGuard)
@Roles(ROLE_VALUES.ADMIN, ROLE_VALUES.COORDINATOR)
@ApiBearerAuth('Authorization')
@ApiSecurity('userIdAuth')
@ApiSecurity('activeRoleAuth')
export class TemplateQuestionController {
  constructor(
    private readonly templateQuestionService: TemplateQuestionService,
    private readonly responseService: ResponseService,
    private readonly logger: AppLoggerService,
  ) {}

  /**
   * Get all template questions with filters
   */
  @Get()
  @HttpCode(HttpStatus.OK)
  @ApiOperation({ summary: 'Get all template questions with filters' })
  @ApiQuery({ name: 'limit', required: false, type: Number })
  @ApiQuery({ name: 'offset', required: false, type: Number })
  @ApiQuery({ name: 'searchText', required: false, type: String })
  @ApiQuery({ name: 'templateFormSectionId', required: false, type: Number })
  @ApiQuery({ name: 'programTemplateId', required: false, type: Number })
  @ApiQuery({ name: 'masterQuestionId', required: false, type: Number })
  @ApiQuery({ name: 'questionType', required: false, type: String })
  @ApiQuery({ name: 'answerType', required: false, type: String })
  @ApiResponse({ status: HttpStatus.OK, description: 'Template questions retrieved successfully' })
  @ApiResponse({ status: HttpStatus.INTERNAL_SERVER_ERROR, description: 'Internal server error' })
  async findAll(@Query() filters: FilterTemplateQuestionDto, @Res() res: Response) {
    this.logger.log('GET /v1/template-questions - Request received', { filters });
    try {
      const result = await this.templateQuestionService.findAll(filters);
      this.logger.log('Template questions retrieved successfully');
      return this.responseService.success(res, 'Template questions retrieved successfully', result);
    } catch (error) {
      handleControllerError(res, error);
    }
  }

  /**
   * Get questions by template section
   */
  @Get('section/:templateFormSectionId')
  @HttpCode(HttpStatus.OK)
  @ApiOperation({ summary: 'Get all questions in a template section' })
  @ApiParam({ name: 'templateFormSectionId', type: Number })
  @ApiResponse({ status: HttpStatus.OK, description: 'Questions retrieved successfully' })
  @ApiResponse({ status: HttpStatus.NOT_FOUND, description: 'Template section not found' })
  @ApiResponse({ status: HttpStatus.INTERNAL_SERVER_ERROR, description: 'Internal server error' })
  async findByTemplateSection(
    @Param('templateFormSectionId', ParseIntPipe) templateFormSectionId: number,
    @Res() res: Response,
  ) {
    this.logger.log('GET /v1/template-questions/section/:templateFormSectionId - Request received', {
      templateFormSectionId,
    });
    try {
      const result = await this.templateQuestionService.findByTemplateSection(templateFormSectionId);
      this.logger.log('Questions retrieved successfully');
      return this.responseService.success(res, 'Questions retrieved successfully', result);
    } catch (error) {
      handleControllerError(res, error);
    }
  }

  /**
   * Get questions by program template
   */
  @Get('template/:programTemplateId')
  @HttpCode(HttpStatus.OK)
  @ApiOperation({ summary: 'Get all questions in a program template' })
  @ApiParam({ name: 'programTemplateId', type: Number })
  @ApiResponse({ status: HttpStatus.OK, description: 'Questions retrieved successfully' })
  @ApiResponse({ status: HttpStatus.INTERNAL_SERVER_ERROR, description: 'Internal server error' })
  async findByProgramTemplate(
    @Param('programTemplateId', ParseIntPipe) programTemplateId: number,
    @Res() res: Response,
  ) {
    this.logger.log('GET /v1/template-questions/template/:programTemplateId - Request received', {
      programTemplateId,
    });
    try {
      const result = await this.templateQuestionService.findByProgramTemplate(programTemplateId);
      this.logger.log('Questions retrieved successfully');
      return this.responseService.success(res, 'Questions retrieved successfully', result);
    } catch (error) {
      handleControllerError(res, error);
    }
  }

  /**
   * Get a single template question by ID
   */
  @Get(':id')
  @HttpCode(HttpStatus.OK)
  @ApiOperation({ summary: 'Get a template question by ID' })
  @ApiParam({ name: 'id', type: Number })
  @ApiResponse({ status: HttpStatus.OK, description: 'Template question retrieved successfully' })
  @ApiResponse({ status: HttpStatus.NOT_FOUND, description: 'Template question not found' })
  @ApiResponse({ status: HttpStatus.INTERNAL_SERVER_ERROR, description: 'Internal server error' })
  async findById(@Param('id', ParseIntPipe) id: number, @Res() res: Response) {
    this.logger.log('GET /v1/template-questions/:id - Request received', { id });
    try {
      const result = await this.templateQuestionService.findById(id);
      this.logger.log('Template question retrieved successfully', { questionId: id });
      return this.responseService.success(res, 'Template question retrieved successfully', result);
    } catch (error) {
      handleControllerError(res, error);
    }
  }

  /**
   * Create a template question
   */
  @Post()
  @HttpCode(HttpStatus.CREATED)
  @ApiOperation({ summary: 'Create a new template question' })
  @ApiResponse({ status: HttpStatus.CREATED, description: 'Template question created successfully' })
  @ApiResponse({ status: HttpStatus.BAD_REQUEST, description: 'Invalid input data' })
  @ApiResponse({ status: HttpStatus.NOT_FOUND, description: 'Template section not found' })
  @ApiResponse({ status: HttpStatus.INTERNAL_SERVER_ERROR, description: 'Internal server error' })
  async create(@Body() createDto: CreateTemplateQuestionDto, @Req() req: any, @Res() res: Response) {
    this.logger.log('POST /v1/template-questions - Request received', { createDto });
    try {
      const userId = req.user?.id;
      if (userId) {
        createDto.createdBy = userId;
      }
      const result = await this.templateQuestionService.create(createDto);
      this.logger.log('Template question created successfully', { questionId: result.id });
      return this.responseService.success(
        res,
        'Template question created successfully',
        result,
        HttpStatus.CREATED,
      );
    } catch (error) {
      handleControllerError(res, error);
    }
  }

  /**
   * Clone questions from master section
   */
  @Post('clone-questions')
  @HttpCode(HttpStatus.CREATED)
  @ApiOperation({ summary: 'Clone questions from master section to template section' })
  @ApiResponse({ status: HttpStatus.CREATED, description: 'Questions cloned successfully' })
  @ApiResponse({ status: HttpStatus.BAD_REQUEST, description: 'Invalid input or no questions to clone' })
  @ApiResponse({ status: HttpStatus.NOT_FOUND, description: 'Master section or template section not found' })
  @ApiResponse({ status: HttpStatus.INTERNAL_SERVER_ERROR, description: 'Internal server error' })
  async cloneQuestions(@Body() cloneDto: CloneQuestionsDto, @Req() req: any, @Res() res: Response) {
    this.logger.log('POST /v1/template-questions/clone-questions - Request received', { cloneDto });
    try {
      const userId = req.user?.id;
      if (userId) {
        cloneDto.createdBy = userId;
      }
      const result = await this.templateQuestionService.cloneQuestions(cloneDto);
      this.logger.log('Questions cloned successfully', {
        clonedCount: result.clonedQuestions,
        skippedCount: result.skipped,
      });
      return this.responseService.success(
        res,
        'Questions cloned successfully',
        result,
        HttpStatus.CREATED,
      );
    } catch (error) {
      handleControllerError(res, error);
    }
  }

  /**
   * Update a template question
   */
  @Put(':id')
  @HttpCode(HttpStatus.OK)
  @ApiOperation({ summary: 'Update a template question' })
  @ApiParam({ name: 'id', type: Number })
  @ApiResponse({ status: HttpStatus.OK, description: 'Template question updated successfully' })
  @ApiResponse({ status: HttpStatus.NOT_FOUND, description: 'Template question not found' })
  @ApiResponse({ status: HttpStatus.BAD_REQUEST, description: 'Invalid input data' })
  @ApiResponse({ status: HttpStatus.INTERNAL_SERVER_ERROR, description: 'Internal server error' })
  async update(
    @Param('id', ParseIntPipe) id: number,
    @Body() updateDto: UpdateTemplateQuestionDto,
    @Req() req: any,
    @Res() res: Response,
  ) {
    this.logger.log('PUT /v1/template-questions/:id - Request received', { id, updateDto });
    try {
      const userId = req.user?.id;
      if (userId) {
        updateDto.updatedBy = userId;
      }
      const result = await this.templateQuestionService.update(id, updateDto);
      this.logger.log('Template question updated successfully', { questionId: id });
      return this.responseService.success(res, 'Template question updated successfully', result);
    } catch (error) {
      handleControllerError(res, error);
    }
  }

  /**
   * Delete a template question
   */
  @Delete(':id')
  @HttpCode(HttpStatus.OK)
  @ApiOperation({ summary: 'Delete a template question (soft delete)' })
  @ApiParam({ name: 'id', type: Number })
  @ApiResponse({ status: HttpStatus.OK, description: 'Template question deleted successfully' })
  @ApiResponse({ status: HttpStatus.NOT_FOUND, description: 'Template question not found' })
  @ApiResponse({ status: HttpStatus.INTERNAL_SERVER_ERROR, description: 'Internal server error' })
  async delete(@Param('id', ParseIntPipe) id: number, @Req() req: any, @Res() res: Response) {
    this.logger.log('DELETE /v1/template-questions/:id - Request received', { id });
    try {
      const userId = req.user?.id;
      const result = await this.templateQuestionService.delete(id, userId);
      this.logger.log('Template question deleted successfully', { questionId: id });
      return this.responseService.success(res, 'Template question deleted successfully', result);
    } catch (error) {
      handleControllerError(res, error);
    }
  }
}