"use client";

import { useState } from "react";
import {
  Sparkles,
  ChevronLeft,
  ChevronRight,
  Send,
} from "lucide-react";
import { Button } from "@/components/ui/button";
import { ScrollArea } from "@/components/ui/scroll-area";
import { Textarea } from "@/components/ui/textarea";

export function RightPanel() {
  const [isCollapsed, setIsCollapsed] = useState(true);
  const [message, setMessage] = useState("");

  if (isCollapsed) {
    return (
      <div className="relative flex w-12 flex-col items-center border-l bg-card/50 py-4">
        <Button
          variant="ghost"
          size="icon"
          onClick={() => setIsCollapsed(false)}
          className="h-8 w-8"
        >
          <Sparkles className="h-4 w-4" />
        </Button>
      </div>
    );
  }

  return (
    <aside className="relative flex w-80 flex-col border-l bg-card/50">
      {/* Header */}
      <div className="flex h-12 items-center justify-between px-4 border-b">
        <h2 className="font-semibold text-sm">AI Chat</h2>
        <Button
          variant="ghost"
          size="icon"
          onClick={() => setIsCollapsed(true)}
          className="h-7 w-7"
        >
          <ChevronRight className="h-4 w-4" />
        </Button>
      </div>

      {/* Chat Messages */}
      <ScrollArea className="flex-1 p-4">
        <div className="space-y-4">
          {/* Empty State */}
          <div className="flex flex-col items-center justify-center py-12 text-center">
            <div className="mb-3 rounded-full bg-primary/10 p-3">
              <Sparkles className="h-6 w-6 text-primary" />
            </div>
            <h3 className="font-medium mb-1">AI Assistant</h3>
            <p className="text-sm text-muted-foreground max-w-[250px]">
              Ask questions about your project, get code suggestions, or
              request documentation
            </p>
          </div>

          {/* Example Chat Messages (for when conversation exists) */}
          {/*
          <div className="space-y-4">
            <div className="flex gap-3">
              <div className="h-8 w-8 rounded-full bg-primary/10 flex items-center justify-center">
                <Sparkles className="h-4 w-4 text-primary" />
              </div>
              <div className="flex-1 space-y-1">
                <div className="text-sm bg-muted rounded-lg p-3">
                  How can I help you with your project today?
                </div>
              </div>
            </div>

            <div className="flex gap-3 flex-row-reverse">
              <div className="h-8 w-8 rounded-full bg-primary flex items-center justify-center text-xs font-medium text-primary-foreground">
                You
              </div>
              <div className="flex-1 space-y-1">
                <div className="text-sm bg-primary text-primary-foreground rounded-lg p-3">
                  What's the current token usage?
                </div>
              </div>
            </div>
          </div>
          */}
        </div>
      </ScrollArea>

      {/* Chat Input */}
      <div className="border-t p-4 space-y-2">
        <div className="flex gap-2">
          <Textarea
            placeholder="Ask AI about your project..."
            value={message}
            onChange={(e) => setMessage(e.target.value)}
            className="min-h-[60px] resize-none"
            onKeyDown={(e) => {
              if (e.key === "Enter" && !e.shiftKey) {
                e.preventDefault();
                // TODO: Send message
                setMessage("");
              }
            }}
          />
          <Button size="icon" className="shrink-0">
            <Send className="h-4 w-4" />
          </Button>
        </div>
        <p className="text-xs text-muted-foreground">
          Press Enter to send, Shift+Enter for new line
        </p>
      </div>
    </aside>
  );
}