"use client";

import React from "react";
import {
  Box,
  FormControlLabel,
  IconButton,
  Paper,
  Switch,
  TextField,
  Typography,
  Button,
} from "@mui/material";
import { DeleteOutlineOutlined, Add } from "@mui/icons-material";
import { FieldArray, Form, getIn, type FormikProps } from "formik";

import type {
  WorkExperienceFormProps,
  WorkExperienceFormValues,
  WorkExperienceFormItem,
} from "./types";
import {
  WORK_EXPERIENCE_EMPTY_ITEM,
  WORK_EXPERIENCE_NO_EXPERIENCE_ITEM,
} from "./constant";

type Props = FormikProps<WorkExperienceFormValues> & WorkExperienceFormProps;

export default function InnerWorkExperienceForm(props: Props) {
  const {
    values,
    errors,
    touched,
    setFieldValue,
    handleChange,
    isSubmitting,
  } = props;

  const workExperiences = values.workExperiences || [];
  const hasNoExperienceMode =
    workExperiences.length === 1 && workExperiences[0]?.hasNoExperience;

  const handleBack = () => {
    props.update({
      workExperiences: values.workExperiences,
    });
    props.setStep(props.step - 1);
  };

  return (
    <Form>
      <FieldArray name="workExperiences">
        {({ push, remove, replace }) => (
          <>
            {workExperiences.map((item: WorkExperienceFormItem, index: number) => {
              const itemErrors = getIn(errors, `workExperiences.${index}`) || {};
              const itemTouched = getIn(touched, `workExperiences.${index}`) || {};

              const setHasNoExperience = (checked: boolean) => {
                if (checked) {
                  replace(0, {
                    ...WORK_EXPERIENCE_NO_EXPERIENCE_ITEM,
                    id: Date.now(),
                  });

                  for (let i = workExperiences.length - 1; i >= 1; i--) {
                    remove(i);
                  }
                } else {
                  setFieldValue(`workExperiences.${index}.hasNoExperience`, false);
                }
              };

              return (
                <Paper
                  key={item.id || index}
                  elevation={0}
                  sx={{
                    p: { xs: 2, md: 3 },
                    borderRadius: "24px",
                    border: "1px solid #e2e8f0",
                    backgroundColor: "#fff",
                    mb: 3,
                  }}
                >
                  <Box
                    sx={{
                      display: "flex",
                      alignItems: "center",
                      justifyContent: "space-between",
                      mb: 2,
                    }}
                  >
                    <Typography sx={{ fontWeight: 700 }}>
                      سابقه کاری {index + 1}
                    </Typography>

                    <IconButton
                      onClick={() => remove(index)}
                      disabled={workExperiences.length === 1 || hasNoExperienceMode}
                      size="small"
                      color="error"
                    >
                      <DeleteOutlineOutlined />
                    </IconButton>
                  </Box>

                  <Box
                    sx={{
                      display: "grid",
                      gridTemplateColumns: {
                        xs: "1fr",
                        md: "repeat(2, 1fr)",
                      },
                      gap: 2,
                    }}
                  >
                    <FormControlLabel
                      sx={{ gridColumn: "1 / -1" }}
                      control={
                        <Switch
                          checked={item.hasNoExperience}
                          onChange={(e) => setHasNoExperience(e.target.checked)}
                        />
                      }
                      label="فاقد سابقه کاری هستم"
                    />

                    <TextField
                      label="نام شرکت"
                      name={`workExperiences.${index}.companyName`}
                      value={item.companyName}
                      onChange={handleChange}
                      fullWidth
                      disabled={item.hasNoExperience}
                      error={!!itemTouched.companyName && !!itemErrors.companyName}
                      helperText={
                        itemTouched.companyName ? itemErrors.companyName : ""
                      }
                    />

                    <TextField
                      label="آخرین سمت"
                      name={`workExperiences.${index}.lastPosition`}
                      value={item.lastPosition}
                      onChange={handleChange}
                      fullWidth
                      disabled={item.hasNoExperience}
                      error={!!itemTouched.lastPosition && !!itemErrors.lastPosition}
                      helperText={
                        itemTouched.lastPosition ? itemErrors.lastPosition : ""
                      }
                    />

                    <TextField
                      label="سال شروع"
                      name={`workExperiences.${index}.startYear`}
                      value={item.startYear}
                      onChange={(e) => {
                        const onlyDigits = e.target.value.replace(/[^\d]/g, "");
                        setFieldValue(
                          `workExperiences.${index}.startYear`,
                          onlyDigits,
                        );
                      }}
                      fullWidth
                      disabled={item.hasNoExperience}
                      inputMode="numeric"
                      error={!!itemTouched.startYear && !!itemErrors.startYear}
                      helperText={itemTouched.startYear ? itemErrors.startYear : ""}
                    />

                    <TextField
                      label="سال پایان"
                      name={`workExperiences.${index}.endYear`}
                      value={item.endYear}
                      onChange={(e) => {
                        const onlyDigits = e.target.value.replace(/[^\d]/g, "");
                        setFieldValue(
                          `workExperiences.${index}.endYear`,
                          onlyDigits,
                        );
                      }}
                      fullWidth
                      disabled={item.hasNoExperience}
                      inputMode="numeric"
                      error={!!itemTouched.endYear && !!itemErrors.endYear}
                      helperText={itemTouched.endYear ? itemErrors.endYear : ""}
                    />

                    <TextField
                      label="علت ترک کار"
                      name={`workExperiences.${index}.leavingReason`}
                      value={item.leavingReason}
                      onChange={handleChange}
                      fullWidth
                      disabled={item.hasNoExperience}
                      error={!!itemTouched.leavingReason && !!itemErrors.leavingReason}
                      helperText={
                        itemTouched.leavingReason ? itemErrors.leavingReason : ""
                      }
                      sx={{ gridColumn: { md: "1 / -1" } }}
                    />

                    <TextField
                      label="توضیحات"
                      name={`workExperiences.${index}.description`}
                      value={item.description}
                      onChange={handleChange}
                      fullWidth
                      disabled={item.hasNoExperience}
                      multiline
                      minRows={3}
                      error={!!itemTouched.description && !!itemErrors.description}
                      helperText={
                        itemTouched.description ? itemErrors.description : ""
                      }
                      sx={{ gridColumn: { md: "1 / -1" } }}
                    />
                  </Box>
                </Paper>
              );
            })}

            {!hasNoExperienceMode && (
              <Button
                type="button"
                variant="outlined"
                startIcon={<Add />}
                onClick={() =>
                  push({
                    ...WORK_EXPERIENCE_EMPTY_ITEM,
                    id: Date.now(),
                  })
                }
                sx={{
                  borderRadius: "12px",
                  mb: 3,
                  fontWeight: 700,
                }}
              >
                افزودن سابقه کاری
              </Button>
            )}

            {typeof errors.workExperiences === "string" && (
              <Typography color="error" sx={{ mb: 2 }}>
                {errors.workExperiences}
              </Typography>
            )}

            <Box
              sx={{
                display: "flex",
                justifyContent: "space-between",
                mt: 4,
                width: "100%",
              }}
            >
              <Button
                disabled={props.step === 1 || isSubmitting}
                type="button"
                onClick={handleBack}
                sx={{
                  borderRadius: "12px",
                  color: "#64748b",
                  fontWeight: 700,
                }}
              >
                بازگشت
              </Button>

              <Button
                variant="contained"
                type="submit"
                disabled={isSubmitting}
                sx={{
                  borderRadius: "12px",
                  px: 4,
                  py: 1.5,
                  bgcolor: props.step === 12 ? "green" : "#2563eb",
                  fontWeight: 700,
                }}
              >
                {props.step === 12 ? "اتمام و ثبت نهایی" : "گام بعدی"}
              </Button>
            </Box>
          </>
        )}
      </FieldArray>
    </Form>
  );
}