import React, { useState } from 'react';
import {
  View,
  Text,
  KeyboardAvoidingView,
  Platform,
  ScrollView,
  TouchableOpacity,
  Alert,
} from 'react-native';
import Svg, { Circle, Rect, Path, G } from 'react-native-svg';
import { getStyles } from './LoginScreen.styles';
import { CustomInput, PrimaryButton } from '@components';
import { useAppTheme } from '@theme';
import { useNavigation } from '@react-navigation/native';
import { NativeStackNavigationProp } from '@react-navigation/native-stack';
import { AuthStackParamList } from '@navigation/navigationTypes';
import { RouteNames } from '@utils/constants';
import {
  loginWithPhone,
  RootState,
  useAppDispatch,
  useAppSelector,
} from '@store';

// Premium SVG Mascot: Delivery boy on scooter
const DeliveryScooterSvg = () => {
  return (
    <View style={{ alignItems: 'center', marginVertical: 20 }}>
      <Svg width="160" height="130" viewBox="0 0 160 130" fill="none">
        {/* Background Accent Circles */}
        <Circle cx="80" cy="65" r="55" fill="#E8F5EE" />
        <Circle cx="120" cy="35" r="15" fill="#C8E6C9" opacity="0.6" />

        {/* Scooter Wheels */}
        <Circle
          cx="45"
          cy="100"
          r="14"
          fill="#37474F"
          stroke="#FFFFFF"
          strokeWidth="3"
        />
        <Circle cx="45" cy="100" r="6" fill="#CFD8DC" />
        <Circle
          cx="115"
          cy="100"
          r="14"
          fill="#37474F"
          stroke="#FFFFFF"
          strokeWidth="3"
        />
        <Circle cx="115" cy="100" r="6" fill="#CFD8DC" />

        {/* Scooter Body */}
        {/* Main deck */}
        <Path
          d="M 45 100 L 115 100"
          stroke="#78909C"
          strokeWidth="6"
          strokeLinecap="round"
        />
        <Path d="M 45 95 L 90 95 L 95 80 L 50 80 Z" fill="#05824C" />
        {/* Front steering column */}
        <Path
          d="M 115 100 L 110 65 L 105 55"
          stroke="#78909C"
          strokeWidth="5"
          strokeLinecap="round"
        />
        {/* Handlebars */}
        <Path
          d="M 100 55 L 112 55"
          stroke="#37474F"
          strokeWidth="4"
          strokeLinecap="round"
        />
        {/* Front Shield */}
        <Path d="M 110 65 L 118 65 L 114 90 L 108 90 Z" fill="#05824C" />

        {/* Delivery Box */}
        <Rect x="30" y="52" width="28" height="28" rx="4" fill="#046B3E" />
        <Rect x="34" y="56" width="20" height="20" rx="2" fill="#05824C" />
        {/* Box Stripe */}
        <Path d="M 30 66 L 58 66" stroke="#FFFFFF" strokeWidth="2" />

        {/* Delivery Rider */}
        {/* Torso/Jacket */}
        <Path d="M 68 55 L 88 55 L 82 82 L 65 82 Z" fill="#05824C" />
        {/* Backpack strap */}
        <Path d="M 64 58 L 74 82" stroke="#37474F" strokeWidth="3" />
        {/* Head / Helmet */}
        <Circle cx="80" cy="38" r="9" fill="#FFCCBC" />
        {/* Helmet */}
        <Path d="M 70 36 C 70 26, 90 26, 90 36 Z" fill="#37474F" />
        {/* Visor */}
        <Path d="M 80 32 L 89 35 L 80 38 Z" fill="#00E5FF" />
        {/* Arm stretching to handle */}
        <Path
          d="M 80 58 L 98 56"
          stroke="#046B3E"
          strokeWidth="4"
          strokeLinecap="round"
        />
        <Path
          d="M 98 56 L 105 55"
          stroke="#FFCCBC"
          strokeWidth="3"
          strokeLinecap="round"
        />

        {/* Motion lines */}
        <Path
          d="M 10 70 L 22 70"
          stroke="#05824C"
          strokeWidth="2"
          strokeLinecap="round"
          opacity="0.8"
        />
        <Path
          d="M 5 80 L 15 80"
          stroke="#05824C"
          strokeWidth="2"
          strokeLinecap="round"
          opacity="0.6"
        />
        <Path
          d="M 12 90 L 20 90"
          stroke="#05824C"
          strokeWidth="2"
          strokeLinecap="round"
          opacity="0.8"
        />
      </Svg>
    </View>
  );
};

export const LoginScreen: React.FC = () => {
  const { colors } = useAppTheme();
  const styles = getStyles(colors);
  const navigation =
    useNavigation<NativeStackNavigationProp<AuthStackParamList>>();

  const [mobileNumber, setMobileNumber] = useState('');
  // const [password, setPassword] = useState('');
  // const [isLoading, setIsLoading] = useState(false);
  const [errors, setErrors] = useState<{ mobile?: string }>({});

  const dispatch = useAppDispatch();
  const { loading } = useAppSelector((state: RootState) => state.auth);

  const validate = () => {
    const newErrors: { mobile?: string } = {};
    if (!mobileNumber) {
      newErrors.mobile = 'Mobile number is required';
    } else if (mobileNumber.length < 9) {
      newErrors.mobile = 'Please enter a valid mobile number';
    }

    // if (!password) {
    //   newErrors.password = 'Password is required';
    // } else if (password.length < 4) {
    //   newErrors.password = 'Password must be at least 4 characters';
    // }

    setErrors(newErrors);
    return Object.keys(newErrors).length === 0;
  };

  const handleLogin = () => {
    if (!validate()) return;

    dispatch(loginWithPhone(mobileNumber))
      .unwrap()
      .then(() => {
        navigation.navigate(RouteNames.Otp, { phone: mobileNumber });
      })
      .catch((error: any) => {
        Alert.alert('Error', error.message);
      });
  };

  // const handleForgotPassword = () => {
  //   Alert.alert('Forgot Password', 'OTP verification will be sent to recover password.');
  // };

  const handleSignUp = () => {
    Alert.alert('Sign Up', 'Redirecting to register partner profile...');
  };

  return (
    <KeyboardAvoidingView
      style={styles.container}
      behavior={Platform.OS === 'ios' ? 'padding' : 'height'}
    >
      <ScrollView
        contentContainerStyle={styles.scrollContainer}
        showsVerticalScrollIndicator={false}
      >
        <DeliveryScooterSvg />

        <View style={styles.headerContainer}>
          <Text style={styles.title}>Welcome Partner!</Text>
          <Text style={styles.subtitle}>Login to continue</Text>
        </View>

        <View style={styles.formContainer}>
          <CustomInput
            label="Mobile number"
            placeholder="+91 98765 43210"
            keyboardType="phone-pad"
            value={mobileNumber}
            onChangeText={text => {
              setMobileNumber(text);
              if (errors.mobile) setErrors({ ...errors, mobile: undefined });
            }}
            error={errors.mobile}
          />

          {/* <CustomInput
            label="Password"
            placeholder="Enter password"
            isPassword
            rightActionText="Forgot Password?"
            onRightActionPress={handleForgotPassword}
            value={password}
            onChangeText={text => {
              setPassword(text);
              if (errors.password) setErrors({ ...errors, password: undefined });
            }}
            error={errors.password}
          /> */}

          <PrimaryButton
            title="Login"
            onPress={handleLogin}
            isLoading={loading}
            style={styles.loginButton}
          />

          <TouchableOpacity onPress={handleSignUp} activeOpacity={0.8}>
            <Text style={styles.footerText}>
              Don’t have an account?{' '}
              <Text style={styles.signUpLink}>Sign up</Text>
            </Text>
          </TouchableOpacity>
        </View>
      </ScrollView>
    </KeyboardAvoidingView>
  );
};

export default LoginScreen;