// frontend/src/Layout.jsx

import React, { useState } from "react";
import { Link } from "react-router-dom";
import { createPageUrl } from "./utils";
import {
  ScanText,
  LayoutDashboard,
  History as HistoryIcon,
  ChevronLeft,
  Sparkles,
} from "lucide-react";
import { cn } from "@/lib/utils";

export default function Layout({ children, currentPageName }) {
  const [collapsed, setCollapsed] = useState(false);

  const navItems = [
    { name: "Dashboard", icon: LayoutDashboard, page: "Dashboard" },
    { name: "History", icon: HistoryIcon, page: "History" },
  ];

  return (
    <div className="min-h-screen bg-[#FAFAFA] flex">
      {/* Sidebar */}
      <aside
        className={cn(
          "fixed left-0 top-0 h-screen bg-white border-r border-slate-200/80 z-50 transition-all duration-300 ease-out flex flex-col",
          collapsed ? "w-[72px]" : "w-[260px]"
        )}
      >
        {/* Logo */}
        <div
          className={cn(
            "h-16 flex items-center border-b border-slate-100 px-4",
            collapsed ? "justify-center" : "justify-between"
          )}
        >
          <Link to={createPageUrl("Dashboard")} className="flex items-center gap-3">
            <div className="h-9 w-9 rounded-xl bg-gradient-to-br from-indigo-500 to-violet-600 flex items-center justify-center shadow-lg shadow-indigo-500/25">
              <ScanText className="h-5 w-5 text-white" />
            </div>
            {!collapsed && (
              <div className="flex flex-col">
                <span className="font-semibold text-slate-900 tracking-tight">EZOFIS AI</span>
                <span className="text-[10px] text-slate-400 font-medium tracking-wide uppercase">
                  Agentic Extract
                </span>
              </div>
            )}
          </Link>
          {!collapsed && (
            <button
              onClick={() => setCollapsed(true)}
              className="h-7 w-7 rounded-lg hover:bg-slate-100 flex items-center justify-center text-slate-400 hover:text-slate-600 transition-colors"
            >
              <ChevronLeft className="h-4 w-4" />
            </button>
          )}
        </div>

        {/* Navigation */}
        <nav className="flex-1 p-3 space-y-1">
          {navItems.map((item) => {
            const isActive = currentPageName === item.page;
            return (
              <Link
                key={item.name}
                to={createPageUrl(item.page)}
                className={cn(
                  "flex items-center gap-3 px-3 py-2.5 rounded-xl transition-all duration-200 group",
                  isActive
                    ? "bg-gradient-to-r from-indigo-50 to-violet-50 text-indigo-600"
                    : "text-slate-500 hover:bg-slate-50 hover:text-slate-700"
                )}
              >
                <item.icon
                  className={cn(
                    "h-5 w-5 flex-shrink-0",
                    isActive ? "text-indigo-600" : "text-slate-400 group-hover:text-slate-600"
                  )}
                />
                {!collapsed && (
                  <span className="font-medium text-sm">{item.name}</span>
                )}
              </Link>
            );
          })}
        </nav>

        {/* Collapse Toggle (when collapsed) */}
        {collapsed && (
          <button
            onClick={() => setCollapsed(false)}
            className="m-3 h-10 rounded-xl bg-slate-50 hover:bg-slate-100 flex items-center justify-center text-slate-400 hover:text-slate-600 transition-colors"
          >
            <ChevronLeft className="h-4 w-4 rotate-180" />
          </button>
        )}

        {/* Pro Badge */}
        {!collapsed && (
          <div className="p-3">
            <div className="p-4 rounded-2xl bg-gradient-to-br from-slate-900 to-slate-800 text-white">
              <div className="flex items-center gap-2 mb-2">
                <Sparkles className="h-4 w-4 text-amber-400" />
                <span className="text-xs font-semibold tracking-wide">UPGRADE TO PRO</span>
              </div>
              <p className="text-xs text-slate-400 mb-3">
                Unlock unlimited extractions &amp; API access
              </p>
              <button className="w-full py-2 px-3 rounded-lg bg-white text-slate-900 text-sm font-semibold hover:bg-slate-100 transition-colors">
                Upgrade Now
              </button>
            </div>
          </div>
        )}
      </aside>

      {/* Main Content */}
      <main
        className={cn(
          "flex-1 transition-all duration-300",
          collapsed ? "ml-[72px]" : "ml-[260px]"
        )}
      >
        {children}
      </main>
    </div>
  );
}