import type {
  ArticleCreateRequest,
  TargetSiteConfig,
  WorkflowTemplateSummary,
} from "@pipeline/shared";

export type NewArticleDraft = {
  targetSiteId: string;
  workflowTemplateId: string;
  briefDescription: string;
  workingTitle: string;
  contentType: string;
  primaryKeyword: string;
};

export type WorkflowTemplateOption = {
  id: string;
  label: string;
  version: number;
  stageCount: number;
};

export type FieldErrors = Record<string, string>;

export type NewArticleFormState = {
  values: NewArticleDraft;
  errors: FieldErrors;
  formError?: string;
};

export function initialDraft(
  sites: readonly TargetSiteConfig[],
  workflows: readonly WorkflowTemplateSummary[] = [],
): NewArticleDraft {
  const workflowOptions = buildWorkflowTemplateOptions(workflows);
  return {
    targetSiteId: sites.length > 0 ? sites[0].id : "",
    workflowTemplateId: workflowOptions.length > 0 ? workflowOptions[0].id : "",
    briefDescription: "",
    workingTitle: "",
    contentType: "longform_guide",
    primaryKeyword: "",
  };
}

export function buildWorkflowTemplateOptions(
  workflows: readonly WorkflowTemplateSummary[],
): WorkflowTemplateOption[] {
  return workflows
    .filter((workflow) => workflow.status === "ACTIVE")
    .map((workflow) => ({
      id: workflow.id,
      label: `${workflow.name} v${workflow.version}`,
      version: workflow.version,
      stageCount: workflow.stages?.length ?? 0,
    }));
}

export function buildCreateArticlePayload(
  values: NewArticleDraft,
): ArticleCreateRequest {
  return {
    target_site_id: values.targetSiteId,
    workflow_template_id: values.workflowTemplateId || null,
    brief_description: values.briefDescription,
    working_title: values.workingTitle || null,
    language: "en",
    content_type: values.contentType,
    primary_keyword: values.primaryKeyword || null,
  };
}

export function validateArticleDraft(values: NewArticleDraft): FieldErrors {
  const errors: FieldErrors = {};

  if (!values.targetSiteId) {
    errors.targetSiteId = "Select a target site";
  }
  if (!values.briefDescription.trim()) {
    errors.briefDescription = "Brief description is required";
  }
  if (!values.contentType.trim()) {
    errors.contentType = "Content type is required";
  }

  return errors;
}