// components/ChangePasswordModal.tsx
import React, { useState, useEffect } from "react";
import { Typography, TextField, Button, Box } from "@mui/material";
import toast from "react-hot-toast";

interface Props {
  open: boolean;
  onClose: () => void;
  onSubmit: (passwordData: {
    currentPassword?: string;
    newPassword: string;
  }) => void;
  isUserChange?: boolean;
}

export const ChangePassword: React.FC<Props> = ({
  open,
  onSubmit,
  isUserChange = false,
}) => {
  const [currentPassword, setCurrentPassword] = useState("");
  const [password, setPassword] = useState<string>("");
  const [confirm, setConfirm] = useState<string>("");
  const [errors, setErrors] = useState<string[]>([]);
  const [isValid, setIsValid] = useState(false);

  // Validate password rules
  useEffect(() => {
    if (!password) {
      setErrors([]);
      setIsValid(false);
      return;
    }

    const newErrors: string[] = [];
    if (password.length < 8) newErrors.push("At least 8 characters");
    if (!/[A-Z]/.test(password)) newErrors.push("One uppercase letter");
    if (!/[a-z]/.test(password)) newErrors.push("One lowercase letter");
    if (!/[0-9]/.test(password)) newErrors.push("One number");
    if (!/[!@#$%^&*(),.?\":{}|<>]/.test(password))
      newErrors.push("One special character");
    if (password !== confirm) newErrors.push("Passwords do not match");

    // If user change mode, require current password
    if (isUserChange && !currentPassword)
      newErrors.push("Current password required");

    setErrors(newErrors);
    setIsValid(newErrors.length === 0);
  }, [confirm, password, currentPassword, isUserChange]);

  const handleSubmit = () => {
    if (!isValid) {
      toast.error("Please fix the validation errors before continuing");
      return;
    }

    onSubmit({
      ...(isUserChange ? { currentPassword } : {}),
      newPassword: password,
    });
  };

  return (
    <Box
      sx={{
        backgroundColor: "white",
        p: 3,
        borderRadius: 2,
        width: 400,
        display: open ? "flex" : "none",
        flexDirection: "column",
        gap: 2,
        boxShadow: 3,
      }}
    >
      {isUserChange ? (
        <Typography variant="body2" color="text.secondary">
          Please enter your current password and choose a new one below.
        </Typography>
      ) : (
        <Typography variant="body2" color="text.secondary">
          You’re currently logged in with a temporary password. Please set a new
          one to continue.
        </Typography>
      )}
      {isUserChange && (
        <TextField
          label="Current Password"
          type="password"
          value={currentPassword}
          onChange={e => setCurrentPassword(e.target.value)}
          fullWidth
          error={isUserChange && !currentPassword}
          helperText={
            isUserChange && !currentPassword
              ? "Current password is required"
              : ""
          }
        />
      )}

      <TextField
        label="New Password"
        type="password"
        value={password}
        onChange={e => setPassword(e.target.value)}
        fullWidth
        error={!isValid && password.length > 0}
      />

      <TextField
        label="Confirm Password"
        type="password"
        value={confirm}
        onChange={e => setConfirm(e.target.value)}
        fullWidth
        error={confirm.length > 0 && password !== confirm}
      />

      <Box sx={{ height: "80px" }}>
        <Typography
          variant="caption"
          color={isValid ? "success.main" : "error.main"}
          sx={{
            fontWeight: 500,
            visibility: password.length > 0 ? "visible" : "hidden",
          }}
        >
          <p>
            {isValid
              ? "✓ Password meets all requirements"
              : "Password must contain:"}
          </p>
        </Typography>

        {!isValid && (
          <Typography
            variant="caption"
            sx={{ color: "error.main", fontSize: "0.8rem" }}
          >
            {errors.join(", ")}
          </Typography>
        )}
      </Box>

      <Button
        variant="contained"
        sx={{ width: "100%", height: 40, fontSize: 16 }}
        onClick={handleSubmit}
        disabled={!isValid}
      >
        Update Password
      </Button>
    </Box>
  );
};