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import { Shield, LayoutDashboard, Database, Cpu, Sun, Moon, Gauge } from 'lucide-react';

interface DashboardHeaderProps {
  activeTab: string;
  setActiveTab: (tab: string) => void;
  isDarkMode: boolean;
  setIsDarkMode: (dark: boolean) => void;
}

export function DashboardHeader({ activeTab, setActiveTab, isDarkMode, setIsDarkMode }: DashboardHeaderProps) {
  const tabs = [
    { id: 'auditor', label: 'Screenshot Auditor', icon: LayoutDashboard },
    { id: 'performance', label: 'Model Performance', icon: Gauge },
    { id: 'explorer', label: 'Model & Dataset Explorer', icon: Database },
  ];

  return (
    <header className="sticky top-0 z-50 bg-card/60 backdrop-blur-md border-b border-border shadow-lg transition-colors duration-300">

      <div className="container mx-auto px-6 py-4 max-w-7xl">

        <div className="flex flex-col md:flex-row items-center justify-between gap-4">

          {/* Brand Info */}

          <div className="flex items-center gap-3">

            <div className="bg-gradient-to-br from-indigo-500 via-purple-500 to-pink-500 p-2.5 rounded-xl shadow-[0_0_15px_rgba(99,102,241,0.4)]">

              <Shield className="w-7 h-7 text-white" />

            </div>

            <div>

              <div className="flex items-center gap-2">

                <h1 className="text-xl font-bold bg-gradient-to-r from-foreground via-foreground/90 to-muted-foreground bg-clip-text text-transparent">

                  Fintech Dark Pattern Detector

                </h1>

                <span className="text-[10px] font-mono font-semibold bg-indigo-500/10 text-indigo-500 dark:text-indigo-400 border border-indigo-500/20 px-2 py-0.5 rounded-full">

                  v1.2.0

                </span>

              </div>

              <p className="text-xs text-muted-foreground flex items-center gap-1.5 mt-0.5">

                <Cpu className="w-3.5 h-3.5 text-indigo-500 dark:text-indigo-400" />

                AI-Powered XAI Compliance Analyzer (TF-IDF & Logistic Regression)

              </p>

            </div>

          </div>



          {/* Navigation & Theme Switcher */}

          <div className="flex items-center gap-3">

            <nav className="flex bg-slate-900/10 dark:bg-slate-900/60 p-1.5 rounded-xl border border-border">

              {tabs.map((tab) => {

                const Icon = tab.icon;

                const isActive = activeTab === tab.id;

                return (

                  <button

                    key={tab.id}

                    onClick={() => setActiveTab(tab.id)}

                    className={`flex items-center gap-2 px-4 py-2 text-xs font-semibold rounded-lg transition-all duration-300 ${

                      isActive

                        ? 'bg-gradient-to-r from-indigo-600 to-purple-600 text-white shadow-md shadow-indigo-500/20 scale-[1.02]'

                        : 'text-muted-foreground hover:text-foreground hover:bg-black/5 dark:hover:bg-white/5'

                    }`}

                  >

                    <Icon className="w-4 h-4" />

                    {tab.label}

                  </button>

                );

              })}

            </nav>



            {/* Theme Toggle Button */}

            <button

              onClick={() => setIsDarkMode(!isDarkMode)}

              className="p-2.5 rounded-xl border border-border bg-card hover:bg-muted/50 text-muted-foreground hover:text-foreground transition-all duration-300 shadow-md flex items-center justify-center cursor-pointer"

              title={isDarkMode ? 'Switch to Light Mode' : 'Switch to Dark Mode'}

            >

              {isDarkMode ? (

                <Sun className="w-4 h-4 text-amber-400" />

              ) : (

                <Moon className="w-4 h-4 text-indigo-500" />

              )}

            </button>

          </div>

        </div>

      </div>

    </header>
  );
}