/**
 * Wagtail API v2 通用类型定义。
 * 对应后端 apps/core/blocks.py 中的 StreamField Block 结构，
 * 前后端字段需保持一致（详见 documents/设计方案分析与完善版.md §2.6）。
 */

export interface WagtailMeta {
  type: string;
  detail_url: string;
  html_url: string | null;
  slug: string;
  first_published_at: string | null;
}

export interface WagtailPageSummary {
  id: number;
  meta: WagtailMeta;
  title: string;
}

export interface WagtailListResponse<T> {
  meta: { total_count: number };
  items: T[];
}

export interface CTAButtonValue {
  text: string;
  link: string;
}

export interface StatItemValue {
  value: string;
  label: string;
}

export interface FeatureItemValue {
  icon?: string;
  title: string;
  description: string;
}

export interface FAQItemValue {
  question: string;
  answer: string; // richtext HTML
}

export interface HeroBlockValue {
  title: string;
  subtitle?: string;
  background_image?: { url: string; title: string } | null;
  buttons: CTAButtonValue[];
}

export interface StatsBlockValue {
  items: StatItemValue[];
}

export interface FeatureGridBlockValue {
  heading?: string;
  items: FeatureItemValue[];
}

export interface FAQBlockValue {
  items: FAQItemValue[];
}

export interface CTABlockValue {
  heading: string;
  description?: string;
  button: CTAButtonValue;
}

export interface LogoCloudBlockValue {
  heading?: string;
  logos: { url: string; title: string }[];
}

export interface CaseStudyBlockValue {
  case_page: WagtailPageSummary | null;
  summary?: string;
}

/** 与后端 apps/forms/models.py FIELD_TYPE_CHOICES 保持一致 */
export type FormFieldType = "text" | "textarea" | "email" | "tel" | "select";

export interface FormFieldDef {
  label: string;
  field_key: string;
  field_type: FormFieldType;
  required: boolean;
  choices: string[];
}

export interface FormDefinitionValue {
  id: number;
  name: string;
  submit_button_text: string;
  success_message: string;
  fields: FormFieldDef[];
}

export interface FormBlockValue {
  form: FormDefinitionValue | null;
}

export type StreamFieldBlock =
  | { id: string; type: "hero"; value: HeroBlockValue }
  | { id: string; type: "stats"; value: StatsBlockValue }
  | { id: string; type: "feature_grid"; value: FeatureGridBlockValue }
  | { id: string; type: "faq"; value: FAQBlockValue }
  | { id: string; type: "cta"; value: CTABlockValue }
  | { id: string; type: "logo_cloud"; value: LogoCloudBlockValue }
  | { id: string; type: "case_study"; value: CaseStudyBlockValue }
  | { id: string; type: "form"; value: FormBlockValue }
  | { id: string; type: "richtext"; value: string };

export interface HomePageDetail extends WagtailPageSummary {
  body: StreamFieldBlock[];
  seo_title_override?: string;
  seo_description_override?: string;
}

export interface BlogPageSummary extends WagtailPageSummary {
  intro?: string;
  published_at?: string;
}

export interface BlogPageDetail extends BlogPageSummary {
  body: StreamFieldBlock[];
}

export interface ProductPageSummary extends WagtailPageSummary {
  summary?: string;
}

export interface ProductPageDetail extends ProductPageSummary {
  body: StreamFieldBlock[];
}

export interface CaseStudyPageSummary extends WagtailPageSummary {
  client_name: string;
  industry?: string;
  published_at?: string;
  summary?: string;
}

export interface CaseStudyPageDetail extends CaseStudyPageSummary {
  body: StreamFieldBlock[];
}

export interface SolutionPageSummary extends WagtailPageSummary {
  industry?: string;
  summary?: string;
}

export interface SolutionPageDetail extends SolutionPageSummary {
  body: StreamFieldBlock[];
}