import {
  ArrayMaxSize,
  IsArray,
  IsBoolean,
  IsOptional,
  IsString,
  MaxLength,
  ValidateNested,
} from 'class-validator';
import { Type } from 'class-transformer';

// Guild C-2: the slash-command catalog is guild-global and rendered by the
// frontend `/` autocomplete. Without a strict schema + caps a single
// authenticated caller could poison it or blow up the DB / clients.
// The global ValidationPipe runs with { whitelist, forbidNonWhitelisted },
// so any unknown field is rejected.

class CommandChoiceDto {
  @IsString()
  @MaxLength(200)
  value!: string;

  @IsString()
  @MaxLength(200)
  label!: string;
}

class CommandArgDto {
  @IsString()
  @MaxLength(100)
  name!: string;

  @IsOptional()
  @IsString()
  @MaxLength(500)
  description?: string;

  @IsOptional()
  @IsString()
  @MaxLength(40)
  type?: string;

  @IsOptional()
  @IsBoolean()
  required?: boolean;

  @IsOptional()
  @IsBoolean()
  captureRemaining?: boolean;

  @IsOptional()
  @IsBoolean()
  preferAutocomplete?: boolean;

  // null when there are no choices (plugin sends explicit null).
  @IsOptional()
  @IsArray()
  @ArrayMaxSize(100)
  @ValidateNested({ each: true })
  @Type(() => CommandChoiceDto)
  choices?: CommandChoiceDto[] | null;
}

class CommandSpecDto {
  @IsString()
  @MaxLength(100)
  name!: string;

  @IsOptional()
  @IsString()
  @MaxLength(100)
  nativeName?: string;

  @IsOptional()
  @IsString()
  @MaxLength(500)
  description?: string;

  @IsOptional()
  @IsBoolean()
  acceptsArgs?: boolean;

  @IsOptional()
  @IsArray()
  @ArrayMaxSize(50)
  @ValidateNested({ each: true })
  @Type(() => CommandArgDto)
  args?: CommandArgDto[];

  @IsOptional()
  @IsString()
  @MaxLength(20)
  argsParsing?: string;
}

export class SyncCommandsDto {
  @IsArray()
  @ArrayMaxSize(200)
  @ValidateNested({ each: true })
  @Type(() => CommandSpecDto)
  commands!: CommandSpecDto[];
}