/**
 * SidebarTabs — Collapsed tab flags
 *
 * When the sidebar is closed, small vertical tabs protrude from the left edge.
 * Clicking a tab opens the sidebar in that mode.
 */

import React from "react";
import type { SidebarTab } from "../../hooks/useSidebar";
import { MessagesIcon } from "../icons/MessagesIcon";
import { ReviewAgentsIcon } from "../ReviewAgentsIcon";

interface SidebarTabsProps {
  activeTab: SidebarTab;
  onToggleTab: (tab: SidebarTab) => void;
  hasDiff: boolean;
  showVersionsTab?: boolean;
  showFilesTab?: boolean;
  showMessagesTab?: boolean;
  showAgentTerminalTab?: boolean;
  isAgentTerminalOpen?: boolean;
  isAgentTerminalRunning?: boolean;
  onToggleAgentTerminal?: () => void;
  hasFileAnnotations?: boolean;
  hasMessageAnnotations?: boolean;
  className?: string;
}

export const SidebarTabs: React.FC<SidebarTabsProps> = ({
  activeTab,
  onToggleTab,
  hasDiff,
  showVersionsTab,
  showFilesTab,
  showMessagesTab,
  showAgentTerminalTab,
  isAgentTerminalOpen,
  isAgentTerminalRunning,
  onToggleAgentTerminal,
  hasFileAnnotations,
  hasMessageAnnotations,
  className,
}) => {
  return (
    <div
      data-sidebar-tabs="true"
      className={`flex flex-col gap-1 pt-3 pl-0.5 flex-shrink-0 ${className ?? ""}`}
    >
      {showAgentTerminalTab && onToggleAgentTerminal && (
        <button
          onClick={onToggleAgentTerminal}
          className={`sidebar-tab-flag group relative flex items-center justify-center w-7 h-9 rounded-r-md border border-l-0 border-border/50 bg-card/80 backdrop-blur-sm transition-colors ${
            isAgentTerminalOpen || isAgentTerminalRunning
              ? "text-primary"
              : "text-muted-foreground hover:text-foreground hover:bg-card"
          }`}
          title={isAgentTerminalRunning ? "Agent running" : "Agent"}
          aria-pressed={isAgentTerminalOpen}
        >
          <ReviewAgentsIcon className="w-3.5 h-3.5" />
          {isAgentTerminalRunning && (
            <span className="absolute top-1 right-1 h-1.5 w-1.5 rounded-full bg-primary" />
          )}
        </button>
      )}

      {/* TOC tab */}
      <button
        onClick={() => onToggleTab("toc")}
        className="sidebar-tab-flag group flex items-center justify-center w-7 h-9 rounded-r-md border border-l-0 border-border/50 bg-card/80 backdrop-blur-sm text-muted-foreground hover:text-foreground hover:bg-card transition-colors"
        title="Table of Contents"
      >
        <svg
          className="w-3.5 h-3.5"
          fill="none"
          viewBox="0 0 24 24"
          stroke="currentColor"
          strokeWidth={2}
        >
          <path
            strokeLinecap="round"
            strokeLinejoin="round"
            d="M4 6h16M4 10h16M4 14h10M4 18h10"
          />
        </svg>
      </button>

      {/* Versions tab — only shown when multiple versions exist */}
      {showVersionsTab && (
        <button
          onClick={() => onToggleTab("versions")}
          className="sidebar-tab-flag group relative flex items-center justify-center w-7 h-9 rounded-r-md border border-l-0 border-border/50 bg-card/80 backdrop-blur-sm text-muted-foreground hover:text-foreground hover:bg-card transition-colors"
          title="Plan Versions"
        >
          <svg
            className="w-3.5 h-3.5"
            fill="none"
            viewBox="0 0 24 24"
            stroke="currentColor"
            strokeWidth={2}
          >
            <path
              strokeLinecap="round"
              strokeLinejoin="round"
              d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z"
            />
          </svg>
          {/* Availability indicator dot */}
          {hasDiff && (
            <span className="absolute top-1 right-1 w-1.5 h-1.5 rounded-full bg-primary" />
          )}
        </button>
      )}

      {showMessagesTab && (
        <button
          onClick={() => onToggleTab("messages")}
          className="sidebar-tab-flag group relative flex items-center justify-center w-7 h-9 rounded-r-md border border-l-0 border-border/50 bg-card/80 backdrop-blur-sm text-muted-foreground hover:text-foreground hover:bg-card transition-colors"
          title="Pick a different message"
        >
          <MessagesIcon />
          {hasMessageAnnotations && (
            <span className="absolute top-1 right-1 w-1.5 h-1.5 rounded-full bg-primary" />
          )}
        </button>
      )}

      {/* Files tab */}
      {showFilesTab && (
        <button
          onClick={() => onToggleTab("files")}
          className="sidebar-tab-flag group relative flex items-center justify-center w-7 h-9 rounded-r-md border border-l-0 border-border/50 bg-card/80 backdrop-blur-sm text-muted-foreground hover:text-foreground hover:bg-card transition-colors"
          title="File Browser"
        >
          <svg
            className="w-3.5 h-3.5"
            fill="none"
            viewBox="0 0 24 24"
            stroke="currentColor"
            strokeWidth={2}
          >
            <path
              strokeLinecap="round"
              strokeLinejoin="round"
              d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"
            />
          </svg>
          {hasFileAnnotations && (
            <span className="absolute top-1 right-1 w-1.5 h-1.5 rounded-full bg-primary" />
          )}
        </button>
      )}
    </div>
  );
};