"use client"

import type React from "react"

import { useState, useEffect } from "react"
import { Button } from "./ui/button"
import { Input } from "./ui/input"
import { Label } from "./ui/label"
import { Checkbox } from "./ui/checkbox"
import { Lock, User, AlertCircle, Server } from "lucide-react"
import { getApiUrl } from "../lib/api-config"
import Image from "next/image"

interface LoginProps {
  onLogin: () => void
}

export function Login({ onLogin }: LoginProps) {
  const [username, setUsername] = useState("")
  const [password, setPassword] = useState("")
  const [rememberMe, setRememberMe] = useState(false)
  const [error, setError] = useState("")
  const [loading, setLoading] = useState(false)

  useEffect(() => {
    const savedUsername = localStorage.getItem("proxmenux-saved-username")
    const savedPassword = localStorage.getItem("proxmenux-saved-password")

    if (savedUsername && savedPassword) {
      setUsername(savedUsername)
      setPassword(savedPassword)
      setRememberMe(true)

      // Auto-login si hay credenciales guardadas
      handleAutoLogin(savedUsername, savedPassword)
    }
  }, [])

  const handleAutoLogin = async (user: string, pass: string) => {
    try {
      const response = await fetch(getApiUrl("/api/auth/login"), {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ username: user, password: pass, remember_me: true }),
      })

      const data = await response.json()

      if (response.ok && data.token) {
        localStorage.setItem("proxmenux-auth-token", data.token)
        onLogin()
      }
    } catch (err) {
      console.log("Auto-login failed, showing login form")
    }
  }

  const handleLogin = async (e: React.FormEvent) => {
    e.preventDefault()
    setError("")

    if (!username || !password) {
      setError("Por favor, introduce usuario y contraseña")
      return
    }

    setLoading(true)

    try {
      const response = await fetch(getApiUrl("/api/auth/login"), {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ username, password, remember_me: rememberMe }),
      })

      const data = await response.json()

      if (!response.ok) {
        throw new Error(data.error || "Fallo en el login")
      }

      // Save token
      localStorage.setItem("proxmenux-auth-token", data.token)

      if (rememberMe) {
        localStorage.setItem("proxmenux-saved-username", username)
        localStorage.setItem("proxmenux-saved-password", password)
      } else {
        // Limpiar credenciales guardadas si no se marcó recordar
        localStorage.removeItem("proxmenux-saved-username")
        localStorage.removeItem("proxmenux-saved-password")
      }

      onLogin()
    } catch (err) {
      setError(err instanceof Error ? err.message : "Fallo en el login")
    } finally {
      setLoading(false)
    }
  }

  return (
    <div className="min-h-screen bg-background flex items-center justify-center p-4">
      <div className="w-full max-w-md space-y-8">
        <div className="text-center space-y-4">
          <div className="flex justify-center">
            <div className="w-20 h-20 relative flex items-center justify-center bg-primary/10 rounded-lg">
              <Image
                src="/images/proxmenux-logo.png"
                alt="ProxMenux Logo"
                width={80}
                height={80}
                className="object-contain"
                priority
                onError={(e) => {
                  const target = e.target as HTMLImageElement
                  target.style.display = "none"
                  const fallback = target.parentElement?.querySelector(".fallback-icon")
                  if (fallback) {
                    fallback.classList.remove("hidden")
                  }
                }}
              />
              <Server className="h-12 w-12 text-primary absolute fallback-icon hidden" />
            </div>
          </div>
          <div>
            <h1 className="text-3xl font-bold">ProxMenux Monitor</h1>
            <p className="text-muted-foreground mt-2">Sign in to access your dashboard</p>
          </div>
        </div>

        <div className="bg-card border border-border rounded-lg p-6 shadow-lg">
          <form onSubmit={handleLogin} className="space-y-4">
            {error && (
              <div className="bg-red-500/10 border border-red-500/20 rounded-lg p-3 flex items-start gap-2">
                <AlertCircle className="h-5 w-5 text-red-500 flex-shrink-0 mt-0.5" />
                <p className="text-sm text-red-500">{error}</p>
              </div>
            )}

            <div className="space-y-2">
              <Label htmlFor="login-username">Username</Label>
              <div className="relative">
                <User className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground" />
                <Input
                  id="login-username"
                  type="text"
                  placeholder="Enter your username"
                  value={username}
                  onChange={(e) => setUsername(e.target.value)}
                  className="pl-10"
                  disabled={loading}
                  autoComplete="username"
                />
              </div>
            </div>

            <div className="space-y-2">
              <Label htmlFor="login-password">Password</Label>
              <div className="relative">
                <Lock className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground" />
                <Input
                  id="login-password"
                  type="password"
                  placeholder="Enter your password"
                  value={password}
                  onChange={(e) => setPassword(e.target.value)}
                  className="pl-10"
                  disabled={loading}
                  autoComplete="current-password"
                />
              </div>
            </div>

            <div className="flex items-center space-x-2">
              <Checkbox
                id="remember-me"
                checked={rememberMe}
                onCheckedChange={(checked) => setRememberMe(checked as boolean)}
                disabled={loading}
              />
              <Label htmlFor="remember-me" className="text-sm font-normal cursor-pointer select-none">
                Remember me
              </Label>
            </div>

            <Button type="submit" className="w-full bg-blue-500 hover:bg-blue-600" disabled={loading}>
              {loading ? "Signing in..." : "Sign In"}
            </Button>
          </form>
        </div>

        <p className="text-center text-sm text-muted-foreground">ProxMenux Monitor v1.0.1</p>
      </div>
    </div>
  )
}