"use client";

import { useState, useEffect, useCallback } from "react";
import { useConversation } from "@/hooks/useConversation";
import { useListening } from "@/hooks/useListening";
import { useSession } from "@/hooks/useSession";
import { useConsent } from "@/hooks/useConsent";

import { SettingsPanel } from "@/components/SettingsPanel";
import { ReportsPanel } from "@/components/ReportsPanel";
import { ConsentModal } from "@/components/ConsentModal";
import { DashboardGrid } from "@/components/DashboardGrid";
import { ComponentOverlay } from "@/components/ComponentOverlay";
import { ObservabilityPanel } from "@/components/ObservabilityPanel";
import { Loader2, Mic, MicOff, Power, Square, Video, VideoOff } from "lucide-react";

interface ChatInterfaceProps {
  wsUrl?: string;
}

export function ChatInterface({ wsUrl = "ws://localhost:8000/api/stream/ws" }: ChatInterfaceProps) {
  const { messages, isConnected, latestCameraFrame, latestComponent, dismissLatestComponent, pendingTools } = useConversation({
    wsUrl,
  });

  const { isListening, toggle: toggleListening, setListening } = useListening();
  const { isActive: isSessionActive, isToggling: isSessionToggling, toggle: baseToggleSession } = useSession();
  const { hasConsented, isLoading: isConsentLoading, giveConsent } = useConsent();
  
  // Camera view visibility state
  const [showCameraView, setShowCameraView] = useState(false);
  
  // Lifted panel state for voice control
  const [showSettings, setShowSettings] = useState(false);
  const [showReports, setShowReports] = useState(false);
  const [settingsSection, setSettingsSection] = useState<string | undefined>(undefined);
  const toggleSettings = useCallback(() => {
    setShowSettings((prev) => {
      if (prev) setSettingsSection(undefined); // clear section when closing
      return !prev;
    });
  }, []);
  const toggleReports = useCallback(() => setShowReports((prev) => !prev), []);

  // Observability panel state
  const [showObservability, setShowObservability] = useState(false);
  const toggleObservability = useCallback(() => setShowObservability((prev) => !prev), []);

  // Wrap session toggle to sync listening state
  const toggleSession = async () => {
    await baseToggleSession();
    // If session is becoming active, the backend auto-enables listening
    if (!isSessionActive) {
      setListening(true);
    }
  };

  // Listen for voice-triggered UI navigation events
  useEffect(() => {
    const handleNavigate = (e: Event) => {
      const { target, section } = (e as CustomEvent).detail;
      switch (target) {
        case "camera":
          setShowCameraView((prev) => !prev);
          break;
        case "settings":
          if (section) {
            // When a section is specified, always open settings to that tab
            setSettingsSection(section);
            setShowSettings(true);
          } else {
            setShowSettings((prev) => {
              if (prev) setSettingsSection(undefined);
              return !prev;
            });
          }
          break;
        case "reports":
          setShowReports((prev) => !prev);
          break;
        case "observability":
          setShowObservability((prev) => !prev);
          break;
      }
    };
    window.addEventListener("ui-navigate", handleNavigate);
    return () => window.removeEventListener("ui-navigate", handleNavigate);
  }, []);

  // Show loading state while checking consent
  if (isConsentLoading) {
    return (
      <div className="flex items-center justify-center h-screen bg-surface text-primary">
        <Loader2 className="w-8 h-8 animate-spin text-accent-cyan" />
      </div>
    );
  }

  return (
    <div className="flex flex-col h-screen text-primary font-sans">
      {/* Consent Modal - shown if not consented */}
      {!hasConsented && <ConsentModal onConsent={giveConsent} />}
      {/* Header - Card style matching mockup */}
      <div className="px-6 pt-6" style={{ width: "100%", maxWidth: 1000, margin: "0 auto" }}>
        <header 
          style={{
            width: "100%",
            display: "flex",
            alignItems: "center",
            justifyContent: "space-between",
            padding: "16px 24px",
            background: "rgba(30, 30, 30, 0.6)",
            backdropFilter: "blur(12px)",
            border: "1px solid var(--color-surface-overlay)",
            borderRadius: 16,
          }}
        >
        <div className="flex items-center gap-3">
          <div className="w-12 h-12 rounded-full overflow-hidden shadow-lg">
            <img src="/reachy-mini-profile-pic.svg" alt="Reachy Mini" className="w-full h-full object-cover" style={{ imageRendering: '-webkit-optimize-contrast' }} />
          </div>
          <div>
            <h1 className="font-heading" style={{ fontSize: 24 , fontWeight: 600, color: "var(--color-text-primary)" }}>Reachy Mini Minder</h1>
            <p style={{ fontSize: 16, color: "var(--color-text-secondary)", fontWeight: 300 }}>Always here for you</p>
          </div>
        </div>
        
        <div className="flex items-center gap-2">
          <SessionToggle 
            isActive={isSessionActive}
            isToggling={isSessionToggling}
            onToggle={toggleSession}
          />
          {/* Only show listen toggle when session is active */}
          {isSessionActive && (
            <ListenToggle 
              isListening={isListening} 
              onToggle={toggleListening}
              disabled={!isSessionActive}
            />
          )}

        </div>
      </header>
      </div>

      {/* Dashboard Grid - Bento Layout */}
      {hasConsented && (
        <DashboardGrid 
          isSessionActive={isSessionActive}
          isConnected={isConnected}
          showCamera={showCameraView}
          cameraFrame={latestCameraFrame}
        />
      )}



      {/* Component overlay - prominently displays the latest GenUI component */}
      {latestComponent && (
        <ComponentOverlay component={latestComponent} onDismiss={dismissLatestComponent} />
      )}

      {/* Disconnected Overlay */}
      {!isConnected && (
        <div className="fixed inset-0 z-[100] bg-black flex items-center justify-center p-6 animate-in fade-in duration-300">
          <div className="max-w-md w-full bg-surface-elevated border border-surface-overlay rounded-3xl overflow-hidden shadow-2xl text-center">
            {/* Image banner - full width, no margin */}
            <div className="w-full h-40 md:h-52">
              <img src="/no-wifi-cartoon.svg" alt="No connection" className="w-full h-full object-cover" />
            </div>
            {/* Text content */}
            <div className="p-8 space-y-4">
              <h2 className="text-xl font-bold">System Offline</h2>
              <p className="text-sm text-secondary">
                Lost connection to the Reachy Mini Minder backend. Controls are disabled until the connection is restored.
              </p>
              <div className="pt-4 flex flex-col gap-2">
                <div className="flex items-center justify-center gap-2 text-xs text-muted py-2 bg-surface-subtle rounded-lg">
                  <Loader2 className="w-3 h-3 animate-spin" />
                  Attempting to reconnect...
                </div>
              </div>
            </div>
          </div>
        </div>
      )}

      {/* Sticky Bottom Navigation */}
      <nav className="sticky bottom-0 z-40 px-4 py-2 border-t border-surface-overlay bg-surface-elevated/95 backdrop-blur-md">
        <div className="max-w-4xl mx-auto flex items-center justify-around">
          {/* Camera toggle */}
          <button
            onClick={() => setShowCameraView(!showCameraView)}
            className={`flex flex-col items-center gap-1 p-2 rounded-xl transition-all ${showCameraView ? 'text-accent-cyan' : 'text-gray-400 hover:text-white'}`}
            aria-label={showCameraView ? 'Hide robot camera' : 'Show robot camera'}
          >
            {showCameraView ? <VideoOff className="w-5 h-5" /> : <Video className="w-5 h-5" />}
            <span className="text-[10px]">Camera</span>
          </button>
          
          {/* Reports */}
          <ReportsPanel isOpen={showReports} onToggle={toggleReports} />
          
          {/* Settings */}
          <SettingsPanel isOpen={showSettings} onToggle={toggleSettings} activeSection={settingsSection} />

          {/* Observability */}
          <ObservabilityPanel
            isOpen={showObservability}
            onToggle={toggleObservability}
            messages={messages}
            isSessionActive={isSessionActive}
            isConnected={isConnected}
          />
        </div>
      </nav>
    </div>
  );
}


interface ListenToggleProps {
  isListening: boolean;
  onToggle: () => void;
  disabled?: boolean;
}

function ListenToggle({ isListening, onToggle, disabled }: ListenToggleProps) {
  return (
    <button
      onClick={onToggle}
      disabled={disabled}
      style={{
        padding: "8px 16px",
        borderRadius: 999,
        fontSize: 13,
        fontWeight: 500,
        display: "flex",
        alignItems: "center",
        gap: 6,
        cursor: disabled ? "not-allowed" : "pointer",
        opacity: disabled ? 0.5 : 1,
        border: isListening 
          ? "1px solid rgba(168, 218, 220, 0.3)" 
          : "1px solid rgba(255, 193, 204, 0.3)",
        background: isListening 
          ? "rgba(168, 218, 220, 0.15)" 
          : "rgba(255, 193, 204, 0.15)",
        color: isListening 
          ? "var(--color-accent-cyan)" 
          : "var(--color-accent-pink)",
      }}
      title={disabled ? "Session is stopped" : isListening ? "Click to pause listening" : "Click to resume listening"}
    >
      {isListening ? (
        <>
          <Mic style={{ width: 14, height: 14 }} />
          <span style={{ display: "flex", alignItems: "center", gap: 4 }}>
            Listening
            <span style={{ display: "flex", gap: 2 }}>
              <span style={{ width: 4, height: 4, background: "currentColor", borderRadius: "50%", animation: "bounce 1s infinite", animationDelay: "0ms" }} />
              <span style={{ width: 4, height: 4, background: "currentColor", borderRadius: "50%", animation: "bounce 1s infinite", animationDelay: "150ms" }} />
              <span style={{ width: 4, height: 4, background: "currentColor", borderRadius: "50%", animation: "bounce 1s infinite", animationDelay: "300ms" }} />
            </span>
          </span>
        </>
      ) : (
        <>
          <MicOff style={{ width: 14, height: 14 }} />
          Paused
        </>
      )}
    </button>
  );
}

interface SessionToggleProps {
  isActive: boolean;
  isToggling: boolean;
  onToggle: () => void;
}

function SessionToggle({ isActive, isToggling, onToggle }: SessionToggleProps) {
  return (
    <button
      onClick={onToggle}
      disabled={isToggling}
      style={{
        padding: "8px 16px",
        borderRadius: 999,
        fontSize: 13,
        fontWeight: 500,
        display: "flex",
        alignItems: "center",
        gap: 6,
        cursor: "pointer",
        border: isActive 
          ? "1px solid rgba(168, 218, 220, 0.3)" 
          : "1px solid var(--color-surface-overlay)",
        background: isActive 
          ? "rgba(168, 218, 220, 0.15)" 
          : "var(--color-surface-elevated)",
        color: isActive 
          ? "var(--color-accent-cyan)" 
          : "var(--color-text-secondary)",
      }}
      title={isActive ? "Click to stop AI session" : "Click to start AI session"}
    >
      {isToggling ? (
        <Loader2 className="w-3 h-3 animate-spin" />
      ) : isActive ? (
        <Power className="w-3 h-3" />
      ) : (
        <Square className="w-3 h-3" />
      )}
      {isActive ? "End Session" : "Start Session"}
    </button>
  );
}