import { api } from "@/lib/api-client";
import { asPaginated, asRecordData } from "@/lib/odoo-api";
import type {
  Classroom,
  ClassroomAssignCourseRequest,
  ClassroomBatchSummary,
  ClassroomCourse,
  ClassroomCreateRequest,
  ClassroomMember,
  ClassroomSection,
  ClassroomStudent,
  PaginatedResponse,
  PaginationParams,
  ApiSuccessResponse,
} from "@/types";

export interface ClassroomListParams extends PaginationParams {
  entity_id?: number;
  branch_id?: number;
  search?: string;
  active?: boolean;
}

export const classroomsService = {
  async list(params?: ClassroomListParams): Promise<PaginatedResponse<Classroom>> {
    const raw = await api.get<unknown>(
      "/classrooms",
      params as Record<string, string | number | boolean | undefined>,
    );
    return asPaginated<Classroom>(raw);
  },

  async getById(id: number): Promise<Classroom> {
    const raw = await api.get<unknown>(`/classrooms/${id}`);
    return asRecordData<Classroom>(raw);
  },

  async create(data: ClassroomCreateRequest): Promise<Classroom> {
    const raw = await api.post<unknown>("/classrooms", data);
    return asRecordData<Classroom>(raw);
  },

  async update(id: number, data: Partial<ClassroomCreateRequest>): Promise<Classroom> {
    const raw = await api.patch<unknown>(`/classrooms/${id}`, data);
    return asRecordData<Classroom>(raw);
  },

  async delete(id: number): Promise<ApiSuccessResponse> {
    return api.delete<ApiSuccessResponse>(`/classrooms/${id}`);
  },

  // ---- Roster ----------------------------------------------------------
  async listStudents(id: number): Promise<{ items: ClassroomStudent[]; total: number }> {
    return api.get(`/classrooms/${id}/students`);
  },

  /** Replace or add to roster. ``mode='set'`` overwrites; ``mode='add'`` appends. */
  async setStudents(
    id: number,
    studentIds: number[],
    mode: "set" | "add" = "set",
  ): Promise<Classroom> {
    const raw = await api.post<unknown>(`/classrooms/${id}/students`, {
      student_ids: studentIds,
      mode,
    });
    return asRecordData<Classroom>(raw);
  },

  async removeStudents(id: number, studentIds: number[]): Promise<Classroom> {
    const raw = await api.delete<unknown>(`/classrooms/${id}/students`, {
      student_ids: studentIds,
    });
    return asRecordData<Classroom>(raw);
  },

  // ---- Homeroom teachers ----------------------------------------------
  async listTeachers(id: number): Promise<{ items: ClassroomMember[]; total: number }> {
    return api.get(`/classrooms/${id}/teachers`);
  },

  async setTeachers(
    id: number,
    teacherIds: number[],
    mode: "set" | "add" = "set",
  ): Promise<Classroom> {
    const raw = await api.post<unknown>(`/classrooms/${id}/teachers`, {
      teacher_ids: teacherIds,
      mode,
    });
    return asRecordData<Classroom>(raw);
  },

  // ---- Courses + cascade ----------------------------------------------
  async listCourses(id: number): Promise<{ items: ClassroomCourse[]; total: number }> {
    return api.get(`/classrooms/${id}/courses`);
  },

  async listSections(
    id: number,
    params?: { course_id?: number; active?: boolean },
  ): Promise<{ items: ClassroomSection[]; total: number }> {
    return api.get(
      `/classrooms/${id}/sections`,
      params as Record<string, string | number | boolean | undefined>,
    );
  },

  /** Assign a course → server creates (or reuses) the canonical batch and
   *  enrolls every classroom student into it. */
  async assignCourse(
    id: number,
    payload: ClassroomAssignCourseRequest,
  ): Promise<{ data: Classroom; batch: ClassroomBatchSummary }> {
    return api.post(`/classrooms/${id}/assign-course`, payload);
  },

  async detachCourse(id: number, courseId: number): Promise<Classroom> {
    const raw = await api.delete<unknown>(`/classrooms/${id}/courses/${courseId}`);
    return asRecordData<Classroom>(raw);
  },

  // ---- Batches --------------------------------------------------------
  async listBatches(id: number): Promise<{ items: ClassroomBatchSummary[]; total: number }> {
    return api.get(`/classrooms/${id}/batches`);
  },
};