import {
  Controller,
  Get,
  Delete,
  Query,
  HttpException,
  HttpStatus,
} from '@nestjs/common';
import { ApiQuery, ApiResponse } from '@nestjs/swagger';
import { LogEntryDto } from './dto/logentry.dto';
import { LoggingService } from './logging.service';
import { LogEntry } from './models/logentry.model';

@Controller('logging')
export class LoggingController {
  constructor(private readonly loggingService: LoggingService) {}

  private static logEntryToDto(entry: LogEntry): LogEntryDto {
    return {
      component: entry.component,
      level: entry.level,
      timestamp: entry.timestamp,
      message: entry.message,
    };
  }

  @Get('/all')
  @ApiResponse({
    status: 201,
    description: 'All log entries',
    type: [LogEntryDto],
  })
  @ApiResponse({
    status: 404,
    description: 'No messages found',
  })
  async allMessages(): Promise<LogEntryDto[]> {
    return this.loggingService.allMessages().then((response) => {
      if (response === null) {
        throw new HttpException(
          'Unable to find the log messages',
          HttpStatus.NOT_FOUND,
        );
      }

      const messages: LogEntryDto[] = [];
      response.forEach((entry) =>
        messages.push(LoggingController.logEntryToDto(entry)),
      );
      return messages;
    });
  }

  @Get('/component')
  @ApiQuery({
    name: 'component',
    description: 'The component filter for the messages',
    type: String,
  })
  @ApiResponse({
    status: 201,
    description: 'All log entries',
    type: [LogEntryDto],
  })
  @ApiResponse({
    status: 404,
    description: 'No messages found',
  })
  async componentMessages(
    @Query('component') component: string,
  ): Promise<LogEntryDto[]> {
    return this.loggingService.componentMessages(component).then((response) => {
      if (response === null) {
        throw new HttpException(
          'Unable to find the log messages',
          HttpStatus.NOT_FOUND,
        );
      }

      const messages: LogEntryDto[] = [];
      response.forEach((entry) =>
        messages.push(LoggingController.logEntryToDto(entry)),
      );
      return messages;
    });
  }

  @Delete('/deleteAll')
  @ApiResponse({
    status: 200,
    description: 'All log entries are deleted',
  })
  async deleteAll(): Promise<void> {
    return this.loggingService.deleteAllMessages();
  }

  @Delete('/deleteComponent')
  @ApiQuery({
    name: 'component',
    description: 'The component filter for the messages',
    type: String,
  })
  @ApiResponse({
    status: 200,
    description: 'All log entries are deleted',
  })
  async deleteComponent(@Query('component') component: string): Promise<void> {
    return this.loggingService.deleteComponentMessages(component);
  }
}