import React, { useState, useContext } from 'react';
import { Eye, EyeOff, Lock, LogIn, Mail } from 'lucide-react-native';
import {
    KeyboardAvoidingView,
    Platform,
    ScrollView,
    Text,
    TextInput,
    TouchableOpacity,
    View,
    Image
} from 'react-native';
import { AuthContext } from '@/utils/authContext';

export default function LoginScreen() {
    const authContext = useContext(AuthContext);
    const [email, setEmail] = useState('');
    const [password, setPassword] = useState('');
    const [showPassword, setShowPassword] = useState(false);
    const [isLoading, setIsLoading] = useState(false);

    const handleLogin = () => {
        setIsLoading(true);
        // Simulazione login
        setTimeout(() => {
            setIsLoading(false);
            authContext.logIn();
        }, 1500);
    };

    return (
        <View className="flex-1 bg-[#099499] h-screen overflow-hidden">
            {/* Header con Logo/Titolo */}
            <View className="h-[35%] flex-column justify-center items-center">
                <Image
                    source={require('@/assets/images/mariani-logo.png')}
                    className='h-24 w-80'
                    resizeMode="contain"
                />
            </View>

            {/* Form Container */}
            <View className="flex-1 bg-white rounded-t-[2.5rem] px-8 pt-10 shadow-xl w-full">
                <KeyboardAvoidingView
                    behavior={Platform.OS === 'ios' ? 'padding' : 'height'}
                    className="flex-1"
                >
                    <ScrollView showsVerticalScrollIndicator={false} className="h-full">
                        <View className="gap-6 flex flex-col" style={{ gap: '1.5rem' }}>
                            {/* Input Email */}
                            <View>
                                <Text className="text-gray-700 text-lg font-bold mb-3 ml-1">Email o Username</Text>
                                <View className="flex-row items-center bg-gray-50 border border-gray-100 rounded-2xl h-16 px-4 flex">
                                    <Mail size={24} color="#9ca3af" />
                                    <TextInput
                                        className="flex-1 ml-4 text-gray-800 text-lg font-medium h-full w-full"
                                        placeholder="mario.rossi@esempio.com"
                                        placeholderTextColor="#9ca3af"
                                        value={email}
                                        onChangeText={setEmail}
                                        autoCapitalize="none"
                                        keyboardType="email-address"
                                    />
                                </View>
                            </View>

                            {/* Input Password */}
                            <View>
                                <Text className="text-gray-700 text-lg font-bold mb-3 ml-1">Password</Text>
                                <View className="flex-row items-center bg-gray-50 border border-gray-100 rounded-2xl h-16 px-4 flex">
                                    <Lock size={24} color="#9ca3af" />
                                    <TextInput
                                        className="flex-1 ml-4 text-gray-800 text-lg font-medium h-full w-full"
                                        placeholder="••••••••"
                                        placeholderTextColor="#9ca3af"
                                        value={password}
                                        onChangeText={setPassword}
                                        secureTextEntry={!showPassword}
                                    />
                                    <TouchableOpacity onPress={() => setShowPassword(!showPassword)}>
                                        {showPassword ? (
                                            <EyeOff size={24} color="#6b7280" />
                                        ) : (
                                            <Eye size={24} color="#6b7280" />
                                        )}
                                    </TouchableOpacity>
                                </View>
                                <TouchableOpacity className="mt-3 self-end" style={{ alignSelf: 'flex-end' }}>
                                    <Text className="text-[#099499] font-bold text-base">Password dimenticata?</Text>
                                </TouchableOpacity>
                            </View>

                            {/* Tasto Login */}
                            <TouchableOpacity
                                onPress={handleLogin}
                                activeOpacity={0.8}
                                className={`bg-[#099499] h-16 rounded-2xl flex-row justify-center items-center shadow-md mt-4 flex ${isLoading ? 'opacity-70' : ''}`}
                                disabled={isLoading}
                            >
                                <Text className="text-white text-xl font-bold mr-2">
                                    {isLoading ? 'Accesso in corso...' : 'Accedi'}
                                </Text>
                                {!isLoading && <LogIn size={24} color="white" />}
                            </TouchableOpacity>
                        </View>
                    </ScrollView>
                </KeyboardAvoidingView>
            </View>
        </View>
    );
}