import { api as client } from "../auth/http";

const BASE = "/contract-templates";

export const BULK_TEMPLATE_DIRECTIONS = ["IMPORT", "EXPORT", "INTERCITY"] as const;

export type BulkTemplateDirection = (typeof BULK_TEMPLATE_DIRECTIONS)[number];

export interface ContractTemplateArticle {
  id: string;
  title: string;
  body: string;
  order: number;
}

export interface ContractTemplate {
  id: string;
  // System container templates use the fixed DIRECTION_CONTAINER(_CUSTOMS)
  // codes; staff-created bulk templates get generated BULK_<cargo>_* codes.
  code: string;
  name: string;
  description?: string | null;
  documentTitle: string;
  whereasClauses: string[];
  articles: ContractTemplateArticle[];
  isActive: boolean;
  /** Bulk templates only: the cargo type this template is written for. */
  cargoTypeId?: string | null;
  cargoType?: { id: string; cargoTypeName: string } | null;
  /** Bulk templates only: IMPORT, EXPORT or INTERCITY. */
  tradeDirection?: BulkTemplateDirection | null;
  /**
   * Bulk templates only: whether this is the with-customs-clearing variant.
   * Null for intercity — domestic movements have no customs leg.
   */
  withCustoms?: boolean | null;
  /**
   * Bulk templates only: the with-customs variant restricted to Ethiopian-side
   * clearing (Djibouti stays with the client).
   */
  ethiopianCustomsOnly?: boolean | null;
  /** The seeded container templates — cannot be deleted. */
  isSystem: boolean;
  createdAt: string;
  updatedAt: string;
}

export interface CreateContractTemplatePayload {
  cargoTypeId: string;
  tradeDirection: BulkTemplateDirection;
  /** Omitted for INTERCITY — the API rejects the flag there. */
  withCustoms?: boolean;
  /** Ethiopian-side clearing only; requires withCustoms: true. */
  ethiopianCustomsOnly?: boolean;
  name?: string;
  description?: string;
}

export interface UpdateContractTemplatePayload {
  name?: string;
  description?: string;
  documentTitle?: string;
  whereasClauses?: string[];
  isActive?: boolean;
}

export interface ArticlePayload {
  title: string;
  body: string;
  position?: number;
}

export const contractTemplatesService = {
  async list(): Promise<ContractTemplate[]> {
    const { data } = await client.get<ContractTemplate[]>(BASE);
    return data;
  },

  async create(payload: CreateContractTemplatePayload): Promise<ContractTemplate> {
    const { data } = await client.post<ContractTemplate>(BASE, payload);
    return data;
  },

  async remove(code: string): Promise<void> {
    await client.delete(`${BASE}/${code}`);
  },

  async getByCode(code: string): Promise<ContractTemplate> {
    const { data } = await client.get<ContractTemplate>(`${BASE}/${code}`);
    return data;
  },

  async update(
    code: string,
    payload: UpdateContractTemplatePayload,
  ): Promise<ContractTemplate> {
    const { data } = await client.patch<ContractTemplate>(
      `${BASE}/${code}`,
      payload,
    );
    return data;
  },

  async preview(code: string): Promise<{ html: string }> {
    const { data } = await client.post<{ html: string }>(
      `${BASE}/${code}/preview`,
      {},
    );
    return data;
  },

  async addArticle(code: string, payload: ArticlePayload): Promise<ContractTemplate> {
    const { data } = await client.post<ContractTemplate>(
      `${BASE}/${code}/articles`,
      payload,
    );
    return data;
  },

  async updateArticle(
    code: string,
    articleId: string,
    payload: Partial<ArticlePayload>,
  ): Promise<ContractTemplate> {
    const { data } = await client.patch<ContractTemplate>(
      `${BASE}/${code}/articles/${articleId}`,
      payload,
    );
    return data;
  },

  async removeArticle(code: string, articleId: string): Promise<ContractTemplate> {
    const { data } = await client.delete<ContractTemplate>(
      `${BASE}/${code}/articles/${articleId}`,
    );
    return data;
  },

  async replaceArticles(
    code: string,
    articles: Array<{ id?: string; title: string; body: string }>,
  ): Promise<ContractTemplate> {
    const { data } = await client.put<ContractTemplate>(
      `${BASE}/${code}/articles`,
      { articles },
    );
    return data;
  },
};