package com.example.basurapp

import android.content.Intent
import android.os.Bundle
import android.util.Patterns
import android.view.View
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.ViewCompat
import androidx.core.view.WindowInsetsCompat
import com.example.basurapp.databinding.ActivityLoginBinding
import com.google.firebase.auth.FirebaseAuth
import com.google.firebase.firestore.FirebaseFirestore

class LoginActivity : AppCompatActivity() {

    private lateinit var binding: ActivityLoginBinding
    private val auth: FirebaseAuth by lazy { FirebaseAuth.getInstance() }
    private val db: FirebaseFirestore by lazy { FirebaseFirestore.getInstance() }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityLoginBinding.inflate(layoutInflater)
        setContentView(binding.root)

        // Padding para system bars
        ViewCompat.setOnApplyWindowInsetsListener(binding.main) { v, insets ->
            val bars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
            v.setPadding(bars.left, bars.top, bars.right, bars.bottom)
            insets
        }

        // Si ya hay sesión activa, ir directo al Main
//        if (auth.currentUser != null) {
//            goToMain()
//            return
//        }

        binding.tvCreateAccount.setOnClickListener {
            startActivity(Intent(this, RegisterActivity::class.java))
        }

        binding.btnEnter.setOnClickListener {
            attemptLogin()
        }
    }

    private fun attemptLogin() {
        val email = binding.etEmail.text?.toString()?.trim().orEmpty()
        val password = binding.etPassword.text?.toString().orEmpty()

        // Validaciones
        if (email.isEmpty() || password.isEmpty()) {
            toast(getString(R.string.error_empty_fields))
            return
        }
        if (!Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
            binding.tilEmail.error = getString(R.string.error_invalid_email)
            return
        }
        binding.tilEmail.error = null

        setLoading(true)
        auth.signInWithEmailAndPassword(email, password)
            .addOnCompleteListener { task ->
                if (task.isSuccessful) {
                    goToMain()
                } else {
                    setLoading(false)
                    toast(task.exception?.localizedMessage ?: "Error al iniciar sesión")
                }
            }
    }

    private fun goToMain() {
        startActivity(Intent(this, MainActivity::class.java))
        finish()
    }

    private fun setLoading(loading: Boolean) {
        binding.progressBar.visibility = if (loading) View.VISIBLE else View.GONE
        binding.btnEnter.isEnabled = !loading
    }

    private fun toast(msg: String) {
        Toast.makeText(this, msg, Toast.LENGTH_SHORT).show()
    }
}