import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import { IsNotEmpty, IsNumber, IsOptional, IsString, Max, Min, IsArray, ValidateNested } from 'class-validator';
import { Type, Transform } from 'class-transformer';

export class DriverTelemetryDto {
  @ApiProperty({ description: 'Driver unique ID', example: 'driver_jo_1042' })
  @IsString()
  @IsNotEmpty()
  @Transform(({ obj, value }) => value ?? obj.driver_id ?? obj.driverId)
  driver_id: string;

  @ApiProperty({ description: 'Latitude coordinate (-90 to 90)', example: 31.9539 })
  @IsNumber()
  @Min(-90)
  @Max(90)
  @Transform(({ obj, value }) => Number(value ?? obj.latitude ?? obj.lat))
  latitude: number;

  @ApiProperty({ description: 'Longitude coordinate (-180 to 180)', example: 35.9106 })
  @IsNumber()
  @Min(-180)
  @Max(180)
  @Transform(({ obj, value }) => Number(value ?? obj.longitude ?? obj.lng))
  longitude: number;

  @ApiProperty({ description: 'Instantaneous vehicle speed in km/h', example: 45.5 })
  @IsNumber()
  @Min(0)
  @Transform(({ obj, value }) => Number(value ?? obj.speed ?? 0))
  speed: number;

  @ApiProperty({ description: 'Compass heading / bearing in degrees (0 - 360)', example: 185.0 })
  @IsNumber()
  @Min(0)
  @Max(360)
  @Transform(({ obj, value }) => Number(value ?? obj.heading ?? 0))
  heading: number;

  @ApiPropertyOptional({ description: 'Distance traveled in meters', example: 1250.4, default: 0 })
  @IsOptional()
  @IsNumber()
  @Transform(({ obj, value }) => (value != null ? Number(value) : (obj.distance != null ? Number(obj.distance) : 0)))
  distance?: number;

  @ApiPropertyOptional({ description: 'Elevation above mean sea level in meters (AMSL)', example: 890.5, default: 0 })
  @IsOptional()
  @IsNumber()
  @Transform(({ obj, value }) => {
    const val = value ?? obj.elevation ?? obj.altitude;
    return val != null ? Number(val) : 0;
  })
  elevation?: number;

  @ApiPropertyOptional({ description: 'Client GPS capture time as ISO-8601', example: '2026-09-16T10:20:30.000Z' })
  @IsOptional()
  @IsString()
  timestamp?: string;
}

export class DriverTelemetryBatchDto {
  @ApiProperty({ type: [DriverTelemetryDto], description: 'Array of telemetry points for batch processing' })
  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => DriverTelemetryDto)
  points: DriverTelemetryDto[];
}