"use client"

import type React from "react"

import { useState } from "react"
import Link from "next/link"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { Card, CardContent, CardDescription, CardFooter, CardHeader, CardTitle } from "@/components/ui/card"
import { Alert, AlertDescription } from "@/components/ui/alert"
import { Eye, EyeOff, MessageCircle } from "lucide-react"

export default function SignInPage() {
  const [email, setEmail] = useState("")
  const [password, setPassword] = useState("")
  const [showPassword, setShowPassword] = useState(false)
  const [isLoading, setIsLoading] = useState(false)
  const [error, setError] = useState("")

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault()
    setIsLoading(true)
    setError("")

    try {
      // TODO: Implement actual authentication logic
      console.log("Sign in attempt:", { email, password })
      // Simulate API call
      await new Promise((resolve) => setTimeout(resolve, 1000))

      // For now, just redirect to main app
      window.location.href = "/chat"
    } catch (err) {
      setError("Invalid email or password. Please try again.")
    } finally {
      setIsLoading(false)
    }
  }

  return (
    <div className="min-h-screen flex items-center justify-center bg-background p-4">
      <Card className="w-full max-w-md">
        <CardHeader className="text-center">
          <div className="flex justify-center mb-4">
            <div className="p-3 bg-primary rounded-full">
              <MessageCircle className="h-8 w-8 text-primary-foreground" />
            </div>
          </div>
          <CardTitle className="text-2xl font-bold">Welcome Back</CardTitle>
          <CardDescription>Sign in to your messenger account</CardDescription>
        </CardHeader>
        <CardContent>
          <form onSubmit={handleSubmit} className="space-y-4">
            {error && (
              <Alert variant="destructive">
                <AlertDescription>{error}</AlertDescription>
              </Alert>
            )}

            <div className="space-y-2">
              <Label htmlFor="email">Email</Label>
              <Input
                id="email"
                type="email"
                placeholder="Enter your email"
                value={email}
                onChange={(e) => setEmail(e.target.value)}
                required
              />
            </div>

            <div className="space-y-2">
              <Label htmlFor="password">Password</Label>
              <div className="relative">
                <Input
                  id="password"
                  type={showPassword ? "text" : "password"}
                  placeholder="Enter your password"
                  value={password}
                  onChange={(e) => setPassword(e.target.value)}
                  required
                />
                <Button
                  type="button"
                  variant="ghost"
                  size="sm"
                  className="absolute right-0 top-0 h-full px-3 py-2 hover:bg-transparent"
                  onClick={() => setShowPassword(!showPassword)}
                >
                  {showPassword ? <EyeOff className="h-4 w-4" /> : <Eye className="h-4 w-4" />}
                </Button>
              </div>
            </div>

            <div className="text-right">
              <Link href="/auth/forgot-password" className="text-sm text-primary hover:underline">
                Forgot password?
              </Link>
            </div>

            <Button type="submit" className="w-full" disabled={isLoading}>
              {isLoading ? "Signing in..." : "Sign In"}
            </Button>
          </form>
        </CardContent>
        <CardFooter className="text-center">
          <p className="text-sm text-muted-foreground">
            Don't have an account?{" "}
            <Link href="/auth/signup" className="text-primary hover:underline">
              Sign up
            </Link>
          </p>
        </CardFooter>
      </Card>
    </div>
  )
}