import type { ResourceField } from './resources';

export type ResourceFormValue = string | number | boolean | string[] | undefined;
export type ResourceFormMode = 'create' | 'edit';

export function isMissingField(value: ResourceFormValue | null): boolean {
  return value === '' || value === null || value === undefined || (Array.isArray(value) && value.length === 0);
}

export function isResourceFieldRequired(
  field: ResourceField,
  mode: ResourceFormMode,
): boolean {
  return Boolean(field.required && !(mode === 'edit' && field.type === 'password'));
}

export function buildResourcePayload(
  fields: ResourceField[],
  form: Record<string, ResourceFormValue>,
  mode: ResourceFormMode = 'create',
): Record<string, unknown> {
  const payload: Record<string, unknown> = {};
  for (const field of fields) {
    if (mode === 'edit' && field.type === 'password') continue;
    const value = form[field.key];
    if (isMissingField(value)) {
      if (!field.required) continue;
      payload[field.key] = value;
      continue;
    }
    switch (field.type) {
      case 'number': {
        const number = Number(value);
        if (!Number.isFinite(number))
          throw new Error(`${field.label}必须是数字`);
        payload[field.key] = number;
        break;
      }
      case 'boolean':
        payload[field.key] = value === true || value === 'true';
        break;
      case 'json':
        if (typeof value !== 'string')
          throw new Error(`${field.label}必须是有效 JSON`);
        JSON.parse(value);
        payload[field.key] = value;
        break;
      case 'date':
      case 'datetime': {
        const date = new Date(String(value));
        if (Number.isNaN(date.getTime()))
          throw new Error(`${field.label}必须是有效日期`);
        payload[field.key] = date.toISOString();
        break;
      }
      default:
        payload[field.key] = value;
    }
  }
  return payload;
}