"use client";

import React, { useCallback, useEffect, useMemo, useState } from "react";
import SearchBox, { Criterion } from "../SearchBox";
import { useTranslation } from "react-i18next";
import SearchResults, { Column } from "../SearchResults";
import EditNote from "@mui/icons-material/EditNote";
import { fetchQcCategoriesForAll } from "@/app/api/settings/qcItemAll/actions";
import { QcCategoryResult } from "@/app/api/settings/qcItemAll";
import {
  deleteDialog,
  errorDialogWithContent,
  submitDialog,
  successDialog,
} from "../Swal/CustomAlerts";
import {
  deleteQcCategoryWithValidation,
  canDeleteQcCategory,
  saveQcCategoryWithValidation,
  SaveQcCategoryInputs,
} from "@/app/api/settings/qcItemAll/actions";
import Delete from "@mui/icons-material/Delete";
import { Add } from "@mui/icons-material";
import { Button, Dialog, DialogActions, DialogContent, DialogTitle, Stack } from "@mui/material";
import QcCategoryDetails from "../QcCategorySave/QcCategoryDetails";
import { FormProvider, useForm } from "react-hook-form";

type SearchQuery = Partial<Omit<QcCategoryResult, "id">>;
type SearchParamNames = keyof SearchQuery;

const Tab2QcCategoryManagement: React.FC = () => {
  const { t } = useTranslation("qcItemAll");
  const [qcCategories, setQcCategories] = useState<QcCategoryResult[]>([]);
  const [filteredQcCategories, setFilteredQcCategories] = useState<QcCategoryResult[]>([]);
  const [openDialog, setOpenDialog] = useState(false);
  const [editingCategory, setEditingCategory] = useState<QcCategoryResult | null>(null);

  useEffect(() => {
    loadCategories();
  }, []);

  const loadCategories = async () => {
    const categories = await fetchQcCategoriesForAll();
    setQcCategories(categories);
    setFilteredQcCategories(categories);
  };

  const formProps = useForm<SaveQcCategoryInputs>({
    defaultValues: {
      code: "",
      name: "",
      description: "",
    },
  });

  const searchCriteria: Criterion<SearchParamNames>[] = useMemo(
    () => [
      { label: t("Code"), paramName: "code", type: "text" },
      { label: t("Name"), paramName: "name", type: "text" },
    ],
    [t]
  );

  const onReset = useCallback(() => {
    setFilteredQcCategories(qcCategories);
  }, [qcCategories]);

  const handleEdit = useCallback((qcCategory: QcCategoryResult) => {
    setEditingCategory(qcCategory);
    formProps.reset({
      id: qcCategory.id,
      code: qcCategory.code,
      name: qcCategory.name,
      description: qcCategory.description || "",
    });
    setOpenDialog(true);
  }, [formProps]);

  const handleAdd = useCallback(() => {
    setEditingCategory(null);
    formProps.reset({
      code: "",
      name: "",
      description: "",
    });
    setOpenDialog(true);
  }, [formProps]);

  const handleSubmit = useCallback(async (data: SaveQcCategoryInputs) => {
    await submitDialog(async () => {
      try {
        const response = await saveQcCategoryWithValidation(data);
        if (response.errors) {
          let errorContents = "";
          for (const [key, value] of Object.entries(response.errors)) {
            formProps.setError(key as keyof SaveQcCategoryInputs, {
              type: "custom",
              message: value,
            });
            errorContents = errorContents + t(value) + "<br>";
          }
          errorDialogWithContent(t("Submit Error"), errorContents, t);
        } else {
          await successDialog(t("Submit Success"), t);
          setOpenDialog(false);
          await loadCategories();
        }
      } catch (error) {
        errorDialogWithContent(t("Submit Error"), String(error), t);
      }
    }, t);
  }, [formProps, t]);

  const handleDelete = useCallback(async (qcCategory: QcCategoryResult) => {
    // Check if can delete first
    const canDelete = await canDeleteQcCategory(qcCategory.id); // This is a server action, token handled server-side
    
    if (!canDelete) {
      errorDialogWithContent(
        t("Cannot Delete"),
        t("Cannot delete QcCategory. It has {itemCount} item(s) and {qcItemCount} qc item(s) linked to it.").replace("{itemCount}", "some").replace("{qcItemCount}", "some"),
        t
      );
      return;
    }

    deleteDialog(async () => {
      try {
        const response = await deleteQcCategoryWithValidation(qcCategory.id);
        if (!response.success || !response.canDelete) {
          errorDialogWithContent(
            t("Delete Error"),
            response.message || t("Cannot Delete"),
            t
          );
        } else {
          await successDialog(t("Delete Success"), t);
          await loadCategories();
        }
      } catch (error) {
        errorDialogWithContent(t("Delete Error"), String(error), t);
      }
    }, t);
  }, [t]);

  const columnWidthSx = (width = "10%") => {
    return { width: width, whiteSpace: "nowrap" };
  };

  const columns = useMemo<Column<QcCategoryResult>[]>(
    () => [
      {
        name: "id",
        label: t("Details"),
        onClick: handleEdit,
        buttonIcon: <EditNote />,
        sx: columnWidthSx("5%"),
      },
      { name: "code", label: t("Code"), sx: columnWidthSx("15%") },
      { name: "name", label: t("Name"), sx: columnWidthSx("30%") },
      { name: "type", label: t("Type"), sx: columnWidthSx("10%") },
      {
        name: "id",
        label: t("Delete"),
        onClick: handleDelete,
        buttonIcon: <Delete />,
        buttonColor: "error",
        sx: columnWidthSx("5%"),
      },
    ],
    [t, handleEdit, handleDelete]
  );

  return (
    <>
      <Stack direction="row" justifyContent="flex-end" sx={{ mb: 2 }}>
        <Button
          variant="contained"
          startIcon={<Add />}
          onClick={handleAdd}
        >
          {t("Create Qc Category")}
        </Button>
      </Stack>
      <SearchBox
        criteria={searchCriteria}
        onSearch={(query) => {
          setFilteredQcCategories(
            qcCategories.filter(
              (qc) =>
                (!query.code || qc.code.toLowerCase().includes(query.code.toLowerCase())) &&
                (!query.name || qc.name.toLowerCase().includes(query.name.toLowerCase()))
            )
          );
        }}
        onReset={onReset}
      />
      <SearchResults<QcCategoryResult>
        items={filteredQcCategories}
        columns={columns}
      />

      {/* Add/Edit Dialog */}
      <Dialog open={openDialog} onClose={() => setOpenDialog(false)} maxWidth="md" fullWidth sx={{ zIndex: 1000 }}>
        <DialogTitle>
          {editingCategory ? t("Edit Qc Category") : t("Create Qc Category")}
        </DialogTitle>
        <FormProvider {...formProps}>
          <form onSubmit={formProps.handleSubmit(handleSubmit)}>
            <DialogContent>
              <QcCategoryDetails />
            </DialogContent>
            <DialogActions>
              <Button onClick={() => setOpenDialog(false)}>{t("Cancel")}</Button>
              <Button type="submit" variant="contained">
                {t("Submit")}
              </Button>
            </DialogActions>
          </form>
        </FormProvider>
      </Dialog>
    </>
  );
};

export default Tab2QcCategoryManagement;

