import React, { useState } from 'react';
import { View, StyleSheet } from 'react-native';
import { Button, Text, Surface } from 'react-native-paper';
import { SafeAreaView } from 'react-native-safe-area-context';
import { useDispatch } from 'react-redux';
import { authApi } from '../../lib/api/auth';
import { setUser, setError } from '../../store/slices/authSlice';

export function LoginScreen() {
  const dispatch = useDispatch();
  const [loading, setLoading] = useState(false);

  const handleLogin = async () => {
    setLoading(true);
    try {
      const user = await authApi.login();
      dispatch(setUser(user));
    } catch (err) {
      const message =
        err instanceof Error ? err.message : 'Login failed. Please try again.';
      dispatch(setError(message));
    } finally {
      setLoading(false);
    }
  };

  return (
    <SafeAreaView style={styles.container}>
      <View style={styles.content}>
        <Surface style={styles.logoContainer} elevation={0}>
          <Text variant="headlineLarge" style={styles.brand}>
            Sea Haven
          </Text>
          <Text variant="titleMedium" style={styles.brandSub}>
            Industries
          </Text>
        </Surface>

        <Text variant="headlineSmall" style={styles.title}>
          Proposal System
        </Text>
        <Text variant="bodyLarge" style={styles.subtitle}>
          Submit and manage proposals from anywhere
        </Text>

        <View style={styles.actions}>
          <Button
            mode="contained"
            icon="google"
            onPress={handleLogin}
            loading={loading}
            disabled={loading}
            contentStyle={styles.buttonContent}
            style={styles.button}
          >
            Sign in with Google
          </Button>
        </View>

        <Text variant="bodySmall" style={styles.footer}>
          Use your Sea Haven Workspace account
        </Text>
      </View>
    </SafeAreaView>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#FAFAFA',
  },
  content: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    paddingHorizontal: 32,
  },
  logoContainer: {
    alignItems: 'center',
    marginBottom: 32,
    backgroundColor: 'transparent',
  },
  brand: {
    fontWeight: '800',
    color: '#1565C0',
  },
  brandSub: {
    color: '#757575',
    marginTop: -4,
  },
  title: {
    fontWeight: '700',
    color: '#212121',
    marginBottom: 8,
  },
  subtitle: {
    color: '#757575',
    textAlign: 'center',
    marginBottom: 48,
  },
  actions: {
    width: '100%',
  },
  buttonContent: {
    paddingVertical: 8,
  },
  button: {
    borderRadius: 8,
  },
  footer: {
    color: '#9E9E9E',
    marginTop: 24,
  },
});