"use client";

import Card from "@mui/material/Card";
import CardContent from "@mui/material/CardContent";
import Grid from "@mui/material/Grid";
import TextField from "@mui/material/TextField";
import Typography from "@mui/material/Typography";
import { useTranslation } from "react-i18next";
import TransferList from "../TransferList";
import Button from "@mui/material/Button";
import Check from "@mui/icons-material/Check";
import Close from "@mui/icons-material/Close";
import { useRouter, useSearchParams } from "next/navigation";
import React from "react";
import Stack from "@mui/material/Stack";
import { Task } from "@/app/api/tasks";
import {
  NewTaskTemplateFormInputs,
  fetchTaskTemplate,
  saveTaskTemplate,
} from "@/app/api/tasks/actions";
import { SubmitHandler, useFieldArray, useForm } from "react-hook-form";
import { errorDialog, submitDialog, successDialog } from "../Swal/CustomAlerts";

interface Props {
  tasks: Task[];
}

const CreateTaskTemplate: React.FC<Props> = ({ tasks }) => {
  const { t } = useTranslation();

  const searchParams = useSearchParams()
  const router = useRouter();
  const handleCancel = () => {
    router.back();
  };

  const items = React.useMemo(
    () =>
      tasks.map((task) => ({
        id: task.id,
        label: task.name,
        group: task.taskGroup || undefined,
      })),
    [tasks],
  );

  const [serverError, setServerError] = React.useState("");

  const {
    register,
    handleSubmit,
    setValue,
    watch,
    resetField,
    formState: { errors, isSubmitting },
  } = useForm<NewTaskTemplateFormInputs>({ defaultValues: { taskIds: [] } });

  const currentTaskIds = watch("taskIds");
  const selectedItems = React.useMemo(() => {
    return items.filter((item) => currentTaskIds.includes(item.id));
  }, [currentTaskIds, items]);

  const [refTaskTemplate, setRefTaskTemplate] = React.useState<NewTaskTemplateFormInputs>()
  const id = searchParams.get('id')

  const fetchCurrentTaskTemplate = async () => {
    try {
      const taskTemplate = await fetchTaskTemplate(parseInt(id!!))

      const defaultValues = {
        id: parseInt(id!!),
        code: taskTemplate.code ?? null,
        name: taskTemplate.name ?? null,
        taskIds: taskTemplate.tasks.map(task => task.id) ?? [],
      }

      setRefTaskTemplate(defaultValues)
    } catch (e) {
      console.log(e)
    }
  }

  React.useLayoutEffect(() => {
    if (id !== null && parseInt(id) > 0) fetchCurrentTaskTemplate()
  }, [id])

  React.useEffect(() => {
    if (refTaskTemplate) {
      setValue("taskIds", refTaskTemplate.taskIds)
      resetField("code", { defaultValue: refTaskTemplate.code })
      resetField("name", { defaultValue: refTaskTemplate.name })
      setValue("id", refTaskTemplate.id)
    }
  }, [refTaskTemplate])

  const onSubmit: SubmitHandler<NewTaskTemplateFormInputs> = React.useCallback(
    async (data) => {
      try {
        setServerError("");
        submitDialog(async () => {
          const response = await saveTaskTemplate(data);

          if (response?.id !== null && response?.id !== undefined && response?.id > 0) {
            successDialog(t("Submit Success"), t).then(() => {
              router.replace("/tasks");
            })
          } else {
            errorDialog(t("Submit Fail"), t).then(() => {
              return false
            })
          }
        }, t)
      } catch (e) {
        setServerError(t("An error has occurred. Please try again later."));
      }
    },
    [router, t],
  );

  return (
    <>
      {
        (id === null || refTaskTemplate !== undefined) && <Stack component="form" onSubmit={handleSubmit(onSubmit)} gap={2}>
          <Card>
            <CardContent sx={{ display: "flex", flexDirection: "column", gap: 1 }}>
              <Typography variant="overline">{t("Task List Setup")}</Typography>
              <Grid
                container
                spacing={2}
                columns={{ xs: 6, sm: 12 }}
                marginBlockEnd={1}
              >
                <Grid item xs={6}>
                  <TextField
                    label={t("Task Template Code")}
                    fullWidth
                    {...register("code", {
                      required: t("Task template code is required"),
                    })}
                    error={Boolean(errors.code?.message)}
                    helperText={errors.code?.message}
                  />
                </Grid>
                <Grid item xs={6}>
                  <TextField
                    label={t("Task Template Name")}
                    fullWidth
                    {...register("name", {
                      required: t("Task template name is required"),
                    })}
                    error={Boolean(errors.name?.message)}
                    helperText={errors.name?.message}
                  />
                </Grid>
              </Grid>
              <TransferList
                allItems={items}
                selectedItems={selectedItems}
                onChange={(selectedTasks) => {
                  setValue(
                    "taskIds",
                    selectedTasks.map((item) => item.id),
                  );
                }}
                allItemsLabel={t("Task Pool")}
                selectedItemsLabel={t("Task List Template")}
              />
            </CardContent>
          </Card>
          {
            serverError && (
              <Typography variant="body2" color="error" alignSelf="flex-end">
                {serverError}
              </Typography>
            )
          }
          <Stack direction="row" justifyContent="flex-end" gap={1}>
            <Button variant="outlined" startIcon={<Close />} onClick={handleCancel}>
              {t("Cancel")}
            </Button>
            <Button
              variant="contained"
              startIcon={<Check />}
              type="submit"
              disabled={isSubmitting}
            >
              {t("Confirm")}
            </Button>
          </Stack>
        </Stack >}
    </>
  );
};

export default CreateTaskTemplate;