import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import { Type } from 'class-transformer';
import {
  IsDateString,
  IsInt,
  IsOptional,
  Max,
  Min,
  ValidateNested,
} from 'class-validator';

import { UpdateContractDocumentDto } from './contract-document.dto';

export class AcceptContractDto {
  @ApiProperty({
    description:
      'How many days the contract stays valid, counted from the accept date. ' +
      'The contract is valid from now through now + validityDays.',
    minimum: 1,
    maximum: 3650,
    example: 365,
  })
  @IsInt()
  @Min(1)
  @Max(3650)
  validityDays!: number;

  /**
   * Explicit validity window picked by staff in the accept dialog. When both are
   * present they win over `validityDays` (which is then only the derived span)
   * and the configured-period check is skipped — staff may enter any range.
   */
  @ApiPropertyOptional({ description: 'Validity start (ISO date)' })
  @IsOptional()
  @IsDateString()
  validFrom?: string;

  @ApiPropertyOptional({ description: 'Validity end (ISO date)' })
  @IsOptional()
  @IsDateString()
  validUntil?: string;

  /**
   * Optional per-contract document override edited by staff in the accept
   * dialog. When present its articles are frozen onto THIS contract; when
   * omitted the live template is snapshotted as-is. Never edits the shared
   * six templates.
   */
  @ApiPropertyOptional({ type: UpdateContractDocumentDto })
  @IsOptional()
  @ValidateNested()
  @Type(() => UpdateContractDocumentDto)
  documentSnapshot?: UpdateContractDocumentDto;
}