// File: lib/services/project.service.ts
import apiClient from "@/lib/api/client";
import {
  CreateProjectDto,
  UpdateProjectDto,
  SearchProjectDto
} from "@/types/dto/project/project.dto";

export interface ProjectListItem {
  uuid: string;
  id?: number;
  projectCode: string;
  projectName: string;
  isActive: boolean;
  createdAt: string;
  updatedAt: string;
}

type ApiEnvelope<T> = {
  data?: ApiEnvelope<T> | T;
  message?: string;
  statusCode?: number;
};

function unwrapApiData<T>(payload: ApiEnvelope<T> | T): ApiEnvelope<T> | T | null {
  let current: ApiEnvelope<T> | T | null = payload;

  while (
    current &&
    typeof current === "object" &&
    "data" in current &&
    current.data !== undefined
  ) {
    current = current.data;
  }

  return current;
}

function unwrapArrayResponse<T>(payload: ApiEnvelope<T[]> | T[]): T[] {
  const unwrapped = unwrapApiData(payload);
  return Array.isArray(unwrapped) ? unwrapped : [];
}

export const projectService = {
  // --- Basic CRUD ---

  /**
   * ดึงรายการโครงการทั้งหมด (รองรับ Search & Pagination)
   * (เดิมคือ getAllProjects แต่ปรับให้รับ params ได้)
   */
  getAll: async (params?: SearchProjectDto): Promise<ProjectListItem[]> => {
    // GET /projects
    const response = await apiClient.get<
      ApiEnvelope<ProjectListItem[]> | ProjectListItem[]
    >("/projects", { params });
    return unwrapArrayResponse(response.data);
  },

  /** ดึงรายละเอียดโครงการตาม UUID */
  getByUuid: async (uuid: string) => {
    const response = await apiClient.get(`/projects/${uuid}`);
    return response.data;
  },

  /** สร้างโครงการใหม่ (Admin) */
  create: async (data: CreateProjectDto) => {
    const response = await apiClient.post("/projects", data);
    return response.data;
  },

  /** แก้ไขโครงการ */
  update: async (uuid: string, data: UpdateProjectDto) => {
    const response = await apiClient.put(`/projects/${uuid}`, data);
    return response.data;
  },

  /** ลบโครงการ (Soft Delete) */
  delete: async (uuid: string) => {
    const response = await apiClient.delete(`/projects/${uuid}`);
    return response.data;
  },

  // --- Related Data / Dropdown Helpers ---

  // --- Related Data / Dropdown Helpers ---
  // Organizations and Contracts should now be fetched via their respective services
  // organizationService.getAll({ projectId })
  // contractService.getAll({ projectId })
};