import { COMPANY_VISIBILITY, HIERARCHY_GRANT_ROLES } from '@mosaicstack/db';
import { IsIn, IsOptional, IsString, IsUUID, Matches, MaxLength, MinLength } from 'class-validator';

/**
 * Hierarchy command DTOs (contract 1 §5, contract 2 §4/§7).
 *
 * The global ValidationPipe runs with whitelist + forbidNonWhitelisted, so a
 * payload field absent from these classes is a 400. That closure is itself
 * contract surface:
 *  - CreateCompanyDto declares NO visibility field — creation is always
 *    private (contract 1 §5.5); a visibility argument is refused by the pipe.
 *  - CreateGrantDto declares NO teamId field — team grant subjects are
 *    suspended (contract 2 §1.4/§7.5); a team subject is refused by the pipe.
 * Every class here must be registered in PIPE_GUARDED_DTOS so the boot-time
 * assertion proves the pipe sees the decorators.
 */

const SLUG_PATTERN = /^[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$/;
const SLUG_MESSAGE = 'slug must be lowercase alphanumeric with interior hyphens';

export class CreateCompanyDto {
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  name!: string;

  @IsString()
  @MaxLength(100)
  @Matches(SLUG_PATTERN, { message: SLUG_MESSAGE })
  slug!: string;

  /** Client-supplied idempotency key (REQ-AUD-001 replay); server-generated when absent. */
  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  idempotencyKey?: string;
}

export class RenameNodeDto {
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  name!: string;

  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  idempotencyKey?: string;
}

export class ChangeCompanyVisibilityDto {
  @IsIn(COMPANY_VISIBILITY)
  visibility!: (typeof COMPANY_VISIBILITY)[number];

  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  idempotencyKey?: string;
}

export class DeleteNodeDto {
  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  idempotencyKey?: string;
}

export class CreateEstateDto {
  @IsUUID()
  companyId!: string;

  @IsString()
  @MinLength(1)
  @MaxLength(255)
  name!: string;

  @IsString()
  @MaxLength(100)
  @Matches(SLUG_PATTERN, { message: SLUG_MESSAGE })
  slug!: string;

  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  idempotencyKey?: string;
}

export class CreatePlatformProjectDto {
  @IsUUID()
  estateId!: string;

  @IsString()
  @MinLength(1)
  @MaxLength(255)
  name!: string;

  @IsString()
  @MaxLength(100)
  @Matches(SLUG_PATTERN, { message: SLUG_MESSAGE })
  slug!: string;

  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  idempotencyKey?: string;
}

export class TransferEstateDto {
  @IsUUID()
  destinationCompanyId!: string;

  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  idempotencyKey?: string;
}

export class TransferPlatformProjectDto {
  @IsUUID()
  destinationEstateId!: string;

  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  idempotencyKey?: string;
}

export class CreateGrantDto {
  /** Subject user (better-auth text id). No teamId field — see module doc. */
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  userId!: string;

  @IsIn(['company', 'estate', 'platform_project'])
  targetKind!: 'company' | 'estate' | 'platform_project';

  @IsUUID()
  targetId!: string;

  /** Bare vocabulary on requests; responses and audit events are namespaced (§4.5). */
  @IsIn(HIERARCHY_GRANT_ROLES)
  role!: (typeof HIERARCHY_GRANT_ROLES)[number];

  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  idempotencyKey?: string;
}

export class ChangeGrantDto {
  @IsIn(HIERARCHY_GRANT_ROLES)
  role!: (typeof HIERARCHY_GRANT_ROLES)[number];

  @IsOptional()
  @IsString()
  @MinLength(1)
  @MaxLength(255)
  idempotencyKey?: string;
}