import {
  Controller,
  Post,
  Body,
  Get,
  HttpCode,
  HttpStatus,
  Logger,
} from '@nestjs/common';
import { ApiTags, ApiOperation, ApiResponse, ApiBody } from '@nestjs/swagger';
import { DirectService } from './direct.service';
import {
  DirectDecodeHashDto,
  DirectDecodeHashResponseDto,
  DirectHealthStatsDto,
} from './direct.dto';

@ApiTags('direct')
@Controller('direct')
export class DirectController {
  private readonly logger = new Logger(DirectController.name);

  constructor(private readonly directService: DirectService) {}

  @Post('decode')
  @HttpCode(HttpStatus.OK)
  @ApiOperation({
    summary: 'Decode a hash using direct connection',
    description:
      'Decode a hash string using direct connection to the API without proxies',
  })
  @ApiResponse({
    status: 200,
    description: 'Hash decoded successfully',
    type: DirectDecodeHashResponseDto,
  })
  @ApiResponse({
    status: 400,
    description: 'Invalid hash format or empty hash',
  })
  @ApiResponse({
    status: 404,
    description: 'Hash not found',
  })
  @ApiResponse({
    status: 429,
    description: 'Rate limit exceeded',
  })
  @ApiResponse({
    status: 500,
    description: 'Internal server error',
  })
  @ApiBody({ type: DirectDecodeHashDto })
  async decodeHash(
    @Body() directDecodeHashDto: DirectDecodeHashDto,
  ): Promise<DirectDecodeHashResponseDto> {
    this.logger.log(
      `📝 Direct decode request received for hash: ${directDecodeHashDto.hash.substring(0, 8)}...`,
    );

    try {
      const result = await this.directService.decodeHash(directDecodeHashDto);
      this.logger.log(
        `✅ Direct decode successful for hash: ${directDecodeHashDto.hash.substring(0, 8)}... (${result.responseTime}ms)`,
      );
      return result;
    } catch (error) {
      this.logger.error(
        `❌ Direct decode failed for hash: ${directDecodeHashDto.hash.substring(0, 8)}... - ${error.message}`,
      );
      throw error;
    }
  }

  @Get('health')
  @ApiOperation({
    summary: 'Get direct service health statistics',
    description:
      'Retrieve comprehensive health and performance statistics for the direct decoder service',
  })
  @ApiResponse({
    status: 200,
    description: 'Health statistics retrieved successfully',
    type: DirectHealthStatsDto,
  })
  getHealthStats(): DirectHealthStatsDto {
    this.logger.log('📊 Direct service health stats requested');
    return this.directService.getHealthStats();
  }

  @Post('reset-stats')
  @HttpCode(HttpStatus.OK)
  @ApiOperation({
    summary: 'Reset service statistics',
    description: 'Reset all performance statistics for the direct service',
  })
  @ApiResponse({
    status: 200,
    description: 'Statistics reset successfully',
  })
  resetStats(): { message: string; previousStats: any } {
    this.logger.log('🔄 Resetting direct service statistics');
    return this.directService.resetStats();
  }

  @Get('status')
  @ApiOperation({
    summary: 'Get service status',
    description:
      'Get current status and basic information about the direct service',
  })
  @ApiResponse({
    status: 200,
    description: 'Service status retrieved successfully',
  })
  getStatus(): {
    service: string;
    status: string;
    connectionMethod: string;
    features: string[];
    timestamp: string;
  } {
    this.logger.log('📋 Direct service status requested');

    return {
      service: 'DirectService',
      status: 'operational',
      connectionMethod: 'direct',
      features: [
        'Direct API connection',
        'No proxy dependencies',
        'Built-in rate limiting',
        'Response time tracking',
        'Automatic retries',
        'SSL/TLS support',
      ],
      timestamp: new Date().toISOString(),
    };
  }
}