import { defineStore } from "pinia";
import { ref, computed } from "vue";
import EmployeeService from "@/services/employee";

import type {
  Employee,
  CreateEmployeePayload,
  UpdateEmployeePayload,
  EmployeeListResponse,
} from "@/services/employee";

export const useEmployeeStore = defineStore("employee", () => {
  // State
  const employees = ref<Employee[]>([]);
  const currentEmployee = ref<Employee | null>(null);
  const loading = ref(false);
  const error = ref<string | null>(null);
  const searchResults = ref<Employee[]>([]);

  // Pagination state
  const pagination = ref({
    current_page: 1,
    last_page: 1,
    per_page: 10,
    total: 0,
    from: 0,
    to: 0,
  });

  // Getters
  const allEmployees = computed(() => employees.value);
  const activeEmployees = computed(() =>
    employees.value.filter((employee) => employee.is_active)
  );
  const inactiveEmployees = computed(() =>
    employees.value.filter((employee) => !employee.is_active)
  );
  const isLoading = computed(() => loading.value);
  const hasError = computed(() => error.value !== null);
  const getError = computed(() => error.value);
  const getEmployeeById = computed(
    () => (id: number) => employees.value.find((employee) => employee.id === id)
  );
  const getPagination = computed(() => pagination.value);

  // Actions
  const setLoading = (isLoading: boolean) => {
    loading.value = isLoading;
  };

  const setError = (err: string | null) => {
    error.value = err;
  };

  const clearError = () => {
    error.value = null;
  };

  const setEmployees = (newEmployees: Employee[]) => {
    employees.value = newEmployees;
  };

  const setCurrentEmployee = (employee: Employee | null) => {
    currentEmployee.value = employee;
  };

  const setSearchEmployee = (searchEmployee: Employee[]) => {
    searchResults.value = searchEmployee;
  };

  const setPagination = (meta: any) => {
    if (meta) {
      pagination.value = {
        current_page: meta.current_page || 1,
        last_page: meta.last_page || 1,
        per_page: meta.per_page || 10,
        total: meta.total || 0,
        from: meta.from || 0,
        to: meta.to || 0,
      };
    }
  };

  /**
   * Fetch all employees with optional pagination and filters
   */
  const fetchEmployees = async (params?: {
    page?: number;
    per_page?: number;
    search?: string;
    active?: boolean;
    sort_by?: string;
    sort_direction?: string;
  }) => {
    setLoading(true);
    setError(null);

    try {
      const response = await EmployeeService.getAllEmployees(params);
      setEmployees(response.data);
      setPagination(response.pagination);
      return response;
    } catch (err: any) {
      const errorMessage =
        err.response?.data?.message ||
        err.message ||
        "Failed to fetch employees";
      setError(errorMessage);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  /**
   * Fetch a single employee by ID
   */
  const fetchEmployee = async (id: number) => {
    setLoading(true);
    setError(null);

    try {
      const response = await EmployeeService.getEmployee(id);
      setCurrentEmployee(response.data);
      return response.data;
    } catch (err: any) {
      const errorMessage =
        err.response?.data?.message ||
        err.message ||
        "Failed to fetch employee";
      setError(errorMessage);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  /**
   * Create a new employee
   */
  const createEmployee = async (payload: CreateEmployeePayload) => {
    setLoading(true);
    setError(null);

    try {
      const response = await EmployeeService.createEmployee(payload);
      // Add the new employee to the list
      employees.value.push(response.data);
      setCurrentEmployee(response.data);
      return response.data;
    } catch (err: any) {
      const errorMessage =
        err.response?.data?.message ||
        err.message ||
        "Failed to create employee";
      setError(errorMessage);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  /**
   * Update an existing employee
   */
  const updateEmployee = async (payload: UpdateEmployeePayload) => {
    setLoading(true);
    setError(null);

    try {
      console.log(payload);
      const response = await EmployeeService.updateEmployee(payload);
      const updatedEmployee = response.data;

      // Update in the employees list
      const index = employees.value.findIndex(
        (employee) => employee.id === updatedEmployee.id
      );
      if (index !== -1) {
        employees.value[index] = updatedEmployee;
      }

      // Update current employee if it's the one being edited
      if (
        currentEmployee.value &&
        currentEmployee.value.id === updatedEmployee.id
      ) {
        setCurrentEmployee(updatedEmployee);
      }

      return updatedEmployee;
    } catch (err: any) {
      const errorMessage =
        err.response?.data?.message ||
        err.message ||
        "Failed to update employee";
      setError(errorMessage);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  /**
   * Delete an employee
   */
  const deleteEmployee = async (id: number) => {
    setLoading(true);
    setError(null);

    try {
      const response = await EmployeeService.deleteEmployee(id);

      // Remove from the employees list
      employees.value = employees.value.filter(
        (employee) => employee.id !== id
      );

      // Clear current employee if it's the one being deleted
      if (currentEmployee.value && currentEmployee.value.id === id) {
        setCurrentEmployee(null);
      }

      return response;
    } catch (err: any) {
      const errorMessage =
        err.response?.data?.message ||
        err.message ||
        "Failed to delete employee";
      setError(errorMessage);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  /**
   * Search employees
   */
  const searchEmployees = async (query: string) => {
    setLoading(true);
    error.value = null;

    try {
      const results = await EmployeeService.searchEmployees(query);
      setSearchEmployee(results);
      return results;
    } catch (err) {
      error.value = "Erreur lors de la recherche des employés";
      console.error("Error searching employees:", err);
      setSearchEmployee([]);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  /**
   * Toggle employee active status
   */
  const toggleEmployeeStatus = async (id: number, isActive: boolean) => {
    setLoading(true);
    setError(null);

    try {
      const response = await EmployeeService.toggleEmployeeStatus(id, isActive);
      const updatedEmployee = response.data;

      // Update in the employees list
      const index = employees.value.findIndex((employee) => employee.id === id);
      if (index !== -1) {
        employees.value[index] = updatedEmployee;
      }

      // Update current employee if it's the one being toggled
      if (currentEmployee.value && currentEmployee.value.id === id) {
        setCurrentEmployee(updatedEmployee);
      }

      return updatedEmployee;
    } catch (err: any) {
      const errorMessage =
        err.response?.data?.message ||
        err.message ||
        "Failed to toggle employee status";
      setError(errorMessage);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  /**
   * Get employee statistics
   */
  const fetchStatistics = async () => {
    setLoading(true);
    setError(null);

    try {
      const response = await EmployeeService.getStatistics();
      return response.data;
    } catch (err: any) {
      const errorMessage =
        err.response?.data?.message ||
        err.message ||
        "Failed to fetch statistics";
      setError(errorMessage);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  /**
   * Clear current employee
   */
  const clearCurrentEmployee = () => {
    setCurrentEmployee(null);
  };

  /**
   * Clear all state
   */
  const clearStore = () => {
    employees.value = [];
    currentEmployee.value = null;
    error.value = null;
    pagination.value = {
      current_page: 1,
      last_page: 1,
      per_page: 10,
      total: 0,
      from: 0,
      to: 0,
    };
  };

  return {
    // State
    employees,
    currentEmployee,
    loading,
    error,
    searchResults,

    // Getters
    allEmployees,
    activeEmployees,
    inactiveEmployees,
    isLoading,
    hasError,
    getError,
    getEmployeeById,
    getPagination,

    // Actions
    fetchEmployees,
    fetchEmployee,
    createEmployee,
    updateEmployee,
    deleteEmployee,
    searchEmployees,
    toggleEmployeeStatus,
    fetchStatistics,
    clearCurrentEmployee,
    clearStore,
    clearError,
  };
});