import { defineStore } from "pinia";
import { ref, computed } from "vue";
import SupplierInvoiceService from "@/services/supplierInvoice";

import type {
  SupplierInvoice,
  CreateSupplierInvoicePayload,
  UpdateSupplierInvoicePayload,
} from "@/services/supplierInvoice";

export const useSupplierInvoiceStore = defineStore("supplierInvoice", () => {
  const supplierInvoices = ref<SupplierInvoice[]>([]);
  const currentSupplierInvoice = ref<SupplierInvoice | null>(null);
  const loading = ref(false);
  const error = ref<string | null>(null);

  const pagination = ref({
    current_page: 1,
    last_page: 1,
    per_page: 10,
    total: 0,
  });

  const allSupplierInvoices = computed(() => supplierInvoices.value);
  const draftInvoices = computed(() =>
    supplierInvoices.value.filter((invoice) => invoice.status === "brouillon")
  );
  const pendingInvoices = computed(() =>
    supplierInvoices.value.filter((invoice) => invoice.status === "en_attente")
  );
  const paidInvoices = computed(() =>
    supplierInvoices.value.filter((invoice) => invoice.status === "payee")
  );
  const cancelledInvoices = computed(() =>
    supplierInvoices.value.filter((invoice) => invoice.status === "annulee")
  );
  const isLoading = computed(() => loading.value);
  const hasError = computed(() => error.value !== null);
  const getError = computed(() => error.value);
  const getSupplierInvoiceById = computed(() => (id: number) =>
    supplierInvoices.value.find((invoice) => invoice.id === id)
  );
  const getPagination = computed(() => pagination.value);

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

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

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

  const setSupplierInvoices = (newSupplierInvoices: SupplierInvoice[]) => {
    supplierInvoices.value = newSupplierInvoices;
  };

  const setCurrentSupplierInvoice = (invoice: SupplierInvoice | null) => {
    currentSupplierInvoice.value = invoice;
  };

  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,
      };
    }
  };

  const fetchSupplierInvoices = async (params?: {
    page?: number;
    per_page?: number;
    search?: string;
    status?: string;
    fournisseur_id?: number;
  }) => {
    setLoading(true);
    setError(null);

    try {
      const response = await SupplierInvoiceService.getAllSupplierInvoices(
        params
      );
      setSupplierInvoices(response.data);
      if (response.meta) {
        setPagination(response.meta);
      }
      return response;
    } catch (err: any) {
      const errorMessage =
        err.response?.data?.message ||
        err.message ||
        "Erreur lors de la récupération des factures fournisseurs";
      setError(errorMessage);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  const fetchSupplierInvoice = async (id: number) => {
    setLoading(true);
    setError(null);

    try {
      const response = await SupplierInvoiceService.getSupplierInvoice(id);
      setCurrentSupplierInvoice(response.data);
      return response.data;
    } catch (err: any) {
      const errorMessage =
        err.response?.data?.message ||
        err.message ||
        "Erreur lors de la récupération de la facture fournisseur";
      setError(errorMessage);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  const createSupplierInvoice = async (
    payload: CreateSupplierInvoicePayload
  ) => {
    setLoading(true);
    setError(null);

    try {
      const response = await SupplierInvoiceService.createSupplierInvoice(
        payload
      );
      supplierInvoices.value.push(response.data);
      setCurrentSupplierInvoice(response.data);
      return response.data;
    } catch (err: any) {
      const errorMessage =
        err.response?.data?.message ||
        err.message ||
        "Erreur lors de la création de la facture fournisseur";
      setError(errorMessage);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  const updateSupplierInvoice = async (
    payload: UpdateSupplierInvoicePayload
  ) => {
    setLoading(true);
    setError(null);

    try {
      const response = await SupplierInvoiceService.updateSupplierInvoice(
        payload
      );
      const updatedInvoice = response.data;

      const index = supplierInvoices.value.findIndex(
        (invoice) => invoice.id === updatedInvoice.id
      );
      if (index !== -1) {
        supplierInvoices.value[index] = updatedInvoice;
      }

      if (
        currentSupplierInvoice.value &&
        currentSupplierInvoice.value.id === updatedInvoice.id
      ) {
        setCurrentSupplierInvoice(updatedInvoice);
      }

      return updatedInvoice;
    } catch (err: any) {
      const errorMessage =
        err.response?.data?.message ||
        err.message ||
        "Erreur lors de la mise à jour de la facture fournisseur";
      setError(errorMessage);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  const deleteSupplierInvoice = async (id: number) => {
    setLoading(true);
    setError(null);

    try {
      const response = await SupplierInvoiceService.deleteSupplierInvoice(id);

      supplierInvoices.value = supplierInvoices.value.filter(
        (invoice) => invoice.id !== id
      );

      if (
        currentSupplierInvoice.value &&
        currentSupplierInvoice.value.id === id
      ) {
        setCurrentSupplierInvoice(null);
      }

      return response;
    } catch (err: any) {
      const errorMessage =
        err.response?.data?.message ||
        err.message ||
        "Erreur lors de la suppression de la facture fournisseur";
      setError(errorMessage);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  const fetchByFournisseur = async (fournisseurId: number) => {
    setLoading(true);
    setError(null);

    try {
      const response = await SupplierInvoiceService.getByFournisseur(
        fournisseurId
      );
      setSupplierInvoices(response.data);
      return response.data;
    } catch (err: any) {
      const errorMessage =
        err.response?.data?.message ||
        err.message ||
        "Erreur lors de la récupération des factures du fournisseur";
      setError(errorMessage);
      throw err;
    } finally {
      setLoading(false);
    }
  };

  const clearCurrentSupplierInvoice = () => {
    setCurrentSupplierInvoice(null);
  };

  const clearStore = () => {
    supplierInvoices.value = [];
    currentSupplierInvoice.value = null;
    error.value = null;
    pagination.value = {
      current_page: 1,
      last_page: 1,
      per_page: 10,
      total: 0,
    };
  };

  return {
    supplierInvoices,
    currentSupplierInvoice,
    loading,
    error,

    allSupplierInvoices,
    draftInvoices,
    pendingInvoices,
    paidInvoices,
    cancelledInvoices,
    isLoading,
    hasError,
    getError,
    getSupplierInvoiceById,
    getPagination,

    fetchSupplierInvoices,
    fetchSupplierInvoice,
    createSupplierInvoice,
    updateSupplierInvoice,
    deleteSupplierInvoice,
    fetchByFournisseur,
    clearCurrentSupplierInvoice,
    clearStore,
    clearError,
  };
});