import { useState } from "react";
import {View,Text,TextInput,Pressable,StyleSheet,Image,Alert,TouchableOpacity,} from "react-native";
import { Eye, EyeOff,ArrowLeft,Check } from "lucide-react-native";
import { router } from "expo-router";
import { signIn } from "../../../firebase/auth"; // Assure-toi que le chemin est correct
import { Link } from "expo-router";
import { KeyboardAwareScrollView } from "react-native-keyboard-aware-scroll-view"; // Import the library
import COLORS from "@/constants/colors";
import AsyncStorage from "@react-native-async-storage/async-storage";


const SignInScreen = () => {
  const [form, setForm] = useState({
    email: "",
    password: "",
    rememberMe: false,
  });

  const [errors, setErrors] = useState({
    email: "",
    password: "",
  });

  const [showPassword, setShowPassword] = useState(false);

  const validateForm = () => {
    let valid = true;
    const newErrors = { email: "", password: "" };

    if (!form.email) {
      newErrors.email = "L'e-mail est requis.";
      valid = false;
    }

    if (!form.password) {
      newErrors.password = "Le mot de passe est requis.";
      valid = false;
    }

    setErrors(newErrors);
    return valid;
  };

  const handleLogin = async () => {
    if (!validateForm()) return;
  
    try {
      const { user } = await signIn(form.email, form.password);
  
      console.log("Connexion réussie :", user.email);
  
      if (form.rememberMe) {
        await AsyncStorage.setItem("rememberMe", "true");
      } else {
        await AsyncStorage.removeItem("rememberMe");
      }
  
      router.replace("/screens/user/UserHomeScreen");
    } catch (error: any) {
      Alert.alert("Erreur", error.message);
    }
  };

  return (
    <KeyboardAwareScrollView
      contentContainerStyle={styles.scrollkeyboard}  // Ensures that the content is scrollable
      enableOnAndroid={true}  // Makes sure it's enabled on Android
      extraScrollHeight={20}  // Adds a little bit more space when the keyboard shows up
      keyboardShouldPersistTaps="handled"  // Ensures that taps on the inputs won't dismiss the keyboard
    >
      <View style={styles.container}>
          <TouchableOpacity
                style={styles.backButton}
                onPress={() => router.back()}
                >
            <ArrowLeft size={24} color="#666" />
          </TouchableOpacity>
        <Image source={require('@/assets/images/logo.png')} style={styles.logo}/>

        <Text style={styles.title}>Se connecter</Text>

        <Text style={styles.welcome}>Bienvenue! 👋</Text>

        <View style={styles.form}>
          <View style={styles.inputGroup}>
            <Text style={styles.label}>E-mail</Text>
            <TextInput
              placeholder="Entrez votre adresse e-mail"
              placeholderTextColor="#666"
              style={[styles.input, errors.email && styles.inputError]}
              keyboardType="email-address"
              autoCapitalize="none"
              value={form.email}
              onChangeText={(text) => {
                setForm({ ...form, email: text });
                if (errors.email) setErrors({ ...errors, email: "" });
              }}
            />
            {errors.email ? (
              <Text style={styles.errorText}>{errors.email}</Text>
            ) : null}
          </View>

          <View style={styles.inputGroup}>
            <Text style={styles.label}>Mot de passe</Text>
            <View
              style={[
                styles.passwordContainer,
                errors.password && styles.inputError,
              ]}
            >
              <TextInput
                placeholder="Entrez votre mot de passe"
                placeholderTextColor="#666"
                style={styles.passwordInput}
                secureTextEntry={!showPassword}
                value={form.password}
                onChangeText={(text) => {
                  setForm({ ...form, password: text });
                  if (errors.password) setErrors({ ...errors, password: "" });
                }}
              />
              <Pressable
                onPress={() => setShowPassword(!showPassword)}
                style={styles.eyeIcon}
              >
                {showPassword ? (
                  <Eye size={20} color="#666" />
                ) : (
                  <EyeOff size={20} color="#666" />
                )}
              </Pressable>
            </View>
            {errors.password ? (
              <Text style={styles.errorText}>{errors.password}</Text>
            ) : null}
          </View>

          <View style={styles.optionsContainer}>
          <Pressable
            style={styles.rememberMe}
            onPress={() => setForm({ ...form, rememberMe: !form.rememberMe })}
          >
            <View
              style={[
                styles.checkbox,
                form.rememberMe && styles.checkboxChecked,
              ]}
            >
              {form.rememberMe && <Check size={16} color="white" />}
            </View>

            <Text style={styles.rememberText}>Rester Connecté</Text>
          </Pressable>

              <TouchableOpacity>            
                <Text style={styles.forgotText}>Mot de passe oublié?</Text>
              </TouchableOpacity>
          </View>
        </View>

        <Pressable style={styles.loginButton} onPress={handleLogin}>
          <Text style={styles.loginButtonText}>Connexion</Text>
        </Pressable>

        <View style={styles.signupContainer}>
          <Text style={styles.signupText}>Nouveau ici? </Text>
          <Link href="/screens/auth/SignUpScreen" style={styles.signupLink}>
            <Text style={styles.signupLinkText}>Créer un compte</Text>
          </Link>
        </View>
      </View>
    </KeyboardAwareScrollView>

    
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: "#fff",
    padding: 20,
  },
  scrollkeyboard:{
    flexGrow: 1,
    backgroundColor:"#fff",

  },
  backButton: {
    marginTop: 20,
    marginLeft: 2,
  },
  backText: {
    fontSize: 40,
    color: "#000",
  },
  logo: {
    width: 100,
    height: 100,
    alignSelf: "center",
    marginBottom: 20,
  },
  title: {
    fontSize: 24,
    fontWeight: "bold",
    textAlign: "center",
    marginBottom: 30,
  },
  
  welcome: {
    fontSize: 28,
    fontWeight: "bold",
    marginBottom: 30,
  },
  form: {
    gap: 20,
  },
  inputGroup: {
    gap: 8,
  },
  label: {
    fontSize: 16,
    fontWeight: "500",
    color: "#333",
  },
  input: {
    backgroundColor: "#f5f5f5",
    padding: 16,
    borderRadius: 8,
    borderWidth:0.5,
    borderColor: COLORS.primary,
    fontSize: 16,
  },
  inputError: {
    borderWidth: 1,
    borderColor: "#ff4444",
  },
  errorText: {
    color: "#ff4444",
    fontSize: 14,
    marginTop: 4,
  },
  passwordContainer: {
    flexDirection: "row",
    alignItems: "center",
    backgroundColor: "#f5f5f5",
    borderRadius: 8,
  },
  passwordInput: {
    flex: 1,
    padding: 16,
    fontSize: 16,
    borderTopLeftRadius: 8,
    borderBottomLeftRadius: 8,
    borderTopWidth: 0.5,
    borderLeftWidth: 0.5,
    borderBottomWidth: 0.5,
    borderColor: COLORS.primary,
  },
  eyeIcon: {
    padding: 17,
    borderTopRightRadius: 8,
    borderBottomRightRadius: 8,
    borderTopWidth: 0.5,
    borderRightWidth: 0.5,
    borderBottomWidth: 0.5,
    borderColor: COLORS.primary,

  },
  optionsContainer: {
    flexDirection: "row",
    justifyContent: "space-between",
    alignItems: "center",
    marginTop: 8,
  },
  rememberMe: {
    flexDirection: "row",
    alignItems: "center",
    gap: 8,
  },
  checkbox: {
    width: 20,
    height: 20,
    borderRadius: 4,
    borderWidth: 2,
    borderColor: "#B17741",
  },
  checkboxChecked: {
    backgroundColor: "#B17741",
  },
  rememberText: {
    color: "#333",
    fontSize: 14,
  },
  forgotPassword: {
    padding: 4,
  },
  forgotText: {
    color: "#B17741",
    fontSize: 14,
    fontWeight: "500",
  },
  loginButton: {
    backgroundColor: "#B17741",
    padding: 16,
    borderRadius: 8,
    marginTop: 50,
  },
  loginButtonText: {
    color: "#fff",
    textAlign: "center",
    fontSize: 16,
    fontWeight: "600",
  },
  signupContainer: {
    flexDirection: "row",
    justifyContent: "center",
    alignItems: "center",
    marginTop: 20,
  },
  signupText: {
    color: "#666",
    fontSize: 14,
  },
  signupLink: {
    padding: 4,
  },
  signupLinkText: {
    color: "#B17741",
    fontSize: 14,
    fontWeight: "500",
  },
});

export default SignInScreen;