"use client";

import Link from "next/link";
import { useTheme } from "next-themes";
import { useAppSelector, useAppDispatch } from "@/lib/hooks";
import { logout } from "@/lib/features/auth/authSlice";
import { Button } from "@/components/ui/button";
import {
    DropdownMenu,
    DropdownMenuContent,
    DropdownMenuItem,
    DropdownMenuLabel,
    DropdownMenuSeparator,
    DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar";
import { Sun, Moon, LogOut, User, LayoutDashboard, Menu } from "lucide-react";
import { Sheet, SheetContent, SheetTrigger } from "@/components/ui/sheet";
import { useState, useEffect } from "react";
import { getAvatarUrl } from "@/lib/utils";

export function Header() {
    const { setTheme, theme } = useTheme();
    const dispatch = useAppDispatch();
    const { isAuthenticated, user } = useAppSelector((state) => state.auth);
    const [mounted, setMounted] = useState(false);

    // Prevent hydration mismatch
    useEffect(() => {
        setMounted(true);
    }, []);

    const handleLogout = () => {
        dispatch(logout());
    };

    if (!mounted) {
        return (
            <header className="sticky top-0 z-50 w-full border-b bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60">
                <div className="container flex h-14 items-center pl-10 pr-10">
                    <div className="mr-4 hidden md:flex">
                        <Link href="/" className="mr-6 flex items-center space-x-2">
                            <span className="hidden font-bold sm:inline-block">
                                NextGoBlog
                            </span>
                        </Link>
                        <nav className="flex items-center space-x-6 text-sm font-medium">
                            <Link href="/blog">Blog</Link>
                            <Link href="/about">Hakkında</Link>
                        </nav>
                    </div>
                    <div className="flex flex-1 items-center justify-end space-x-2">
                        <div className="flex items-center gap-2">
                            <Button variant="ghost" asChild>
                                <Link href="/login">Giriş Yap</Link>
                            </Button>
                            <Button asChild>
                                <Link href="/register">Kayıt Ol</Link>
                            </Button>
                        </div>
                    </div>
                </div>
            </header>
        )
    }

    return (
        <header className="sticky top-0 z-50 w-full border-b bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60">
            <div className="container flex h-14 items-center pl-10 pr-10">
                {/* Desktop Interface */}
                <div className="mr-4 hidden md:flex">
                    <Link href="/" className="mr-6 flex items-center space-x-2">
                        <span className="hidden font-bold sm:inline-block">
                            NextGoBlog
                        </span>
                    </Link>
                    <nav className="flex items-center space-x-6 text-sm font-medium">
                        <Link href="/blog">Blog</Link>
                        <Link href="/about">Hakkında</Link>
                    </nav>
                </div>

                {/* Mobile Interface */}
                <Sheet>
                    <SheetTrigger asChild>
                        <Button
                            variant="ghost"
                            className="mr-2 px-0 text-base hover:bg-transparent focus-visible:bg-transparent focus-visible:ring-0 focus-visible:ring-offset-0 md:hidden"
                        >
                            <Menu className="h-5 w-5" />
                            <span className="sr-only">Toggle Menu</span>
                        </Button>
                    </SheetTrigger>
                    <SheetContent side="left" className="pr-0">
                        <Link href="/" className="flex items-center">
                            <span className="font-bold">NextGoBlog</span>
                        </Link>
                        <nav className="mt-8 flex flex-col gap-4">
                            <Link href="/blog">Blog</Link>
                            <Link href="/about">Hakkında</Link>
                        </nav>
                    </SheetContent>
                </Sheet>

                {/* Right Side */}
                <div className="flex flex-1 items-center justify-end space-x-2">
                    <Button
                        variant="ghost"
                        size="icon"
                        onClick={() => setTheme(theme === "dark" ? "light" : "dark")}
                    >
                        <Sun className="h-[1.2rem] w-[1.2rem] rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
                        <Moon className="absolute h-[1.2rem] w-[1.2rem] rotate-90 scale-0 transition-all dark:rotate-0 dark:scale-100" />
                        <span className="sr-only">Toggle theme</span>
                    </Button>

                    {isAuthenticated ? (
                        <DropdownMenu>
                            <DropdownMenuTrigger asChild>
                                <Button variant="ghost" className="relative h-8 w-8 rounded-full">
                                    <Avatar className="h-8 w-8">
                                        <AvatarImage src={getAvatarUrl(user?.avatar_url)} alt={user?.username} />
                                        <AvatarFallback>{user?.username?.slice(0, 2).toUpperCase()}</AvatarFallback>
                                    </Avatar>
                                </Button>
                            </DropdownMenuTrigger>
                            <DropdownMenuContent className="w-56" align="end" forceMount>
                                <DropdownMenuLabel className="font-normal">
                                    <div className="flex flex-col space-y-1">
                                        <p className="text-sm font-medium leading-none">{user?.username}</p>
                                        <p className="text-xs leading-none text-muted-foreground">
                                            {user?.email}
                                        </p>
                                    </div>
                                </DropdownMenuLabel>
                                <DropdownMenuSeparator />
                                {user?.roles?.some((r: any) => r.name === "admin") && (
                                    <DropdownMenuItem asChild>
                                        <Link href="/admin">
                                            <LayoutDashboard className="mr-2 h-4 w-4" />
                                            <span>Admin Panel</span>
                                        </Link>
                                    </DropdownMenuItem>
                                )}
                                <DropdownMenuItem asChild>
                                    <Link href="/profile">
                                        <User className="mr-2 h-4 w-4" />
                                        <span>Profil</span>
                                    </Link>
                                </DropdownMenuItem>
                                <DropdownMenuSeparator />
                                <DropdownMenuItem onClick={handleLogout}>
                                    <LogOut className="mr-2 h-4 w-4" />
                                    <span>Çıkış Yap</span>
                                </DropdownMenuItem>
                            </DropdownMenuContent>
                        </DropdownMenu>
                    ) : (
                        <div className="flex items-center gap-2">
                            <Button variant="ghost" asChild>
                                <Link href="/login">Giriş Yap</Link>
                            </Button>
                            <Button asChild>
                                <Link href="/register">Kayıt Ol</Link>
                            </Button>
                        </div>
                    )}
                </div>
            </div>
        </header>
    );
}