import { IsNotEmpty, IsString, IsNumber, IsBoolean, IsOptional, IsArray, IsEnum, ValidateNested, IsObject } from 'class-validator';
import { Type } from 'class-transformer';
import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import { WorkflowStep } from 'src/Types&Enums/blame-request-management/blameWorkflow-steps.enum';
import { ClaimWorkflowStep } from 'src/Types&Enums/claim-request-management/claim-workflow-steps.enum';
import { Types } from 'mongoose';

// Combined enum for validation
const AllWorkflowSteps = { ...WorkflowStep, ...ClaimWorkflowStep };

export class StepFieldDto {
  @ApiProperty({ 
    description: 'Unique identifier for the field',
    example: '507f1f77bcf86cd799439011'
  })
  @IsNotEmpty()
  id: Types.ObjectId;

  @ApiProperty({ 
    description: 'Field name in Farsi',
    example: 'فایل ویدیو'
  })
  @IsNotEmpty()
  @IsString()
  name_fa: string;

  @ApiProperty({ 
    description: 'Field name in English',
    example: 'videoFile'
  })
  @IsNotEmpty()
  @IsString()
  name_en: string;

  @ApiPropertyOptional({ 
    description: 'Field label in Farsi',
    example: 'فایل ویدیو'
  })
  @IsOptional()
  @IsString()
  label_fa?: string;

  @ApiPropertyOptional({ 
    description: 'Field label in English',
    example: 'Video File'
  })
  @IsOptional()
  @IsString()
  label_en?: string;

  @ApiPropertyOptional({ 
    description: 'Placeholder text in Farsi',
    example: 'فایل ویدیو خود را آپلود کنید'
  })
  @IsOptional()
  @IsString()
  placeholder_fa?: string;

  @ApiPropertyOptional({ 
    description: 'Placeholder text in English',
    example: 'Upload your video file'
  })
  @IsOptional()
  @IsString()
  placeholder_en?: string;

  @ApiPropertyOptional({ 
    description: 'Possible values for select/multiselect fields (null for non-select fields)',
    example: null,
    nullable: true,
    default: null
  })
  @IsOptional()
  value?: Object[] | null;

  @ApiProperty({ 
    description: 'Data type of the field',
    example: 'file',
    enum: ['string', 'number', 'boolean', 'date', 'select', 'multiselect', 'file', 'textarea', 'email', 'phone']
  })
  @IsNotEmpty()
  @IsString()
  dataType: string;

  @ApiPropertyOptional({ 
    description: 'Whether the field is required',
    example: true,
    default: false
  })
  @IsOptional()
  @IsBoolean()
  required?: boolean;

  @ApiPropertyOptional({ 
    description: 'Validation rules for the field',
    example: { maxSize: 52428800, allowedTypes: ['video/mp4', 'video/webm'] }
  })
  @IsOptional()
  @IsObject()
  validation?: Object;

  @ApiPropertyOptional({ 
    description: 'Display order of the field in the form',
    example: 1
  })
  @IsOptional()
  @IsNumber()
  order?: number;

  @ApiPropertyOptional({ 
    description: 'Whether the field is active',
    example: true,
    default: true
  })
  @IsOptional()
  @IsBoolean()
  isActive?: boolean;
}

export class CreateWorkflowStepDto {
  @ApiProperty({ 
    description: 'Unique key identifying the workflow step (blame or claim)',
    example: 'FIRST_VIDEO',
    enum: AllWorkflowSteps
  })
  @IsNotEmpty()
  @IsEnum(AllWorkflowSteps)
  stepKey: WorkflowStep | ClaimWorkflowStep;

  @ApiProperty({ 
    description: 'Workflow type: THIRD_PARTY (blame), CAR_BODY (blame), or CLAIM (claim workflow)',
    example: 'THIRD_PARTY',
    enum: ['THIRD_PARTY', 'CAR_BODY', 'CLAIM']
  })
  @IsNotEmpty()
  @IsString()
  type: string;

  @ApiProperty({ 
    description: 'Order number of the step within this workflow type',
    example: 2
  })
  @IsNotEmpty()
  @IsNumber()
  stepNumber: number;

  @ApiPropertyOptional({ 
    description: 'Whether the step is active',
    example: true,
    default: true
  })
  @IsOptional()
  @IsBoolean()
  isActive?: boolean;

  @ApiProperty({ 
    description: 'Step name in Farsi',
    example: 'ویدیو طرف اول'
  })
  @IsNotEmpty()
  @IsString()
  stepName_fa: string;

  @ApiProperty({ 
    description: 'Step name in English',
    example: 'First Party Video'
  })
  @IsNotEmpty()
  @IsString()
  stepName_en: string;

  @ApiPropertyOptional({ 
    description: 'Step description in Farsi',
    example: 'ضبط ویدیو توسط طرف اول'
  })
  @IsOptional()
  @IsString()
  description_fa?: string;

  @ApiPropertyOptional({ 
    description: 'Step description in English',
    example: 'Video capture by first party'
  })
  @IsOptional()
  @IsString()
  description_en?: string;

  @ApiPropertyOptional({ 
    description: 'Category of the step within workflow (e.g., INITIAL, FIRST_PARTY, EXPERT)',
    example: 'FIRST_PARTY',
    enum: ['INITIAL', 'FIRST_PARTY', 'SECOND_PARTY', 'CLAIM', 'EXPERT', 'INSURER', 'FINAL']
  })
  @IsOptional()
  @IsString()
  category?: string;

  @ApiPropertyOptional({ 
    description: 'Dynamic fields for this step',
    type: [StepFieldDto],
    example: [
      {
        id: '507f1f77bcf86cd799439011',
        name_fa: 'فایل ویدیو',
        name_en: 'videoFile',
        label_fa: 'فایل ویدیو',
        label_en: 'Video File',
        value: null,
        dataType: 'file',
        required: true,
        order: 1,
        isActive: true,
        validation: {
          maxSize: 52428800,
          allowedTypes: ['video/mp4', 'video/webm']
        }
      }
    ]
  })
  @IsOptional()
  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => StepFieldDto)
  fields?: StepFieldDto[];

  @ApiPropertyOptional({ 
    description: 'Steps that must be completed before this step',
    example: ['CREATED'],
    enum: AllWorkflowSteps,
    isArray: true
  })
  @IsOptional()
  @IsArray()
  @IsEnum(AllWorkflowSteps, { each: true })
  requiredPreviousSteps?: (WorkflowStep | ClaimWorkflowStep)[];

  @ApiPropertyOptional({ 
    description: 'Possible next steps after completing this step',
    example: ['FIRST_INITIAL_FORM'],
    enum: AllWorkflowSteps,
    isArray: true
  })
  @IsOptional()
  @IsArray()
  @IsEnum(AllWorkflowSteps, { each: true })
  nextPossibleSteps?: (WorkflowStep | ClaimWorkflowStep)[];

  @ApiPropertyOptional({ 
    description: 'Additional metadata for the step',
    example: { icon: 'video', color: '#3B82F6' }
  })
  @IsOptional()
  @IsObject()
  metadata?: Record<string, any>;

  @ApiPropertyOptional({ 
    description: 'Estimated duration in minutes',
    example: 5
  })
  @IsOptional()
  @IsNumber()
  estimatedDuration?: number;

  @ApiPropertyOptional({ 
    description: 'Roles allowed to access this step',
    example: ['user', 'expert', 'admin']
  })
  @IsOptional()
  @IsArray()
  @IsString({ each: true })
  allowedRoles?: string[];
}