"use client";

import { useState, useEffect } from "react";
import { useMissionControl } from "@/lib/mission-control/store";
import { TaskStatus } from "@/lib/mission-control/types";
import VoiceChat from "./VoiceChat";
import AIManagement from "@/components/ai-management/AIManagement";

interface SidebarItem {
  id: string;
  name: string;
  icon: string;
  color?: string;
  category: string;
}

interface SidebarCategory {
  id: string;
  name: string;
  icon: string;
  items: SidebarItem[];
}

const sidebarCategories: SidebarCategory[] = [
  { id: "projects", name: "Projects", icon: "🎯", items: [
    { id: "sitemente", name: "SiteMente", icon: "🌐", color: "#ff7bc0", category: "projects" },
    { id: "holacompi", name: "HolaCompi", icon: "🤝", color: "#6366f1", category: "projects" },
  ]},
  { id: "tasks", name: "Tasks", icon: "✓", items: [
    { id: "all", name: "All Tasks", icon: "📋", category: "tasks" },
  ]},
  { id: "chat", name: "Chat", icon: "💬", items: [
    { id: "voice", name: "Voice Chat", icon: "🎤", category: "chat" },
  ]},
  { id: "council", name: "Council", icon: "🏛️", items: [
    { id: "ai-settings", name: "AI Settings", icon: "🤖", category: "council" },
  ]},
  { id: "calendar", name: "Calendar", icon: "📅", items: [
    { id: "brief", name: "Morning Brief", icon: "☀️", category: "calendar" },
  ]},
  { id: "memory", name: "Memory", icon: "🧠", items: [
    { id: "logs", name: "Session Logs", icon: "📝", category: "memory" },
  ]},
];

const statusConfig: Record<TaskStatus, { label: string; color: string }> = {
  todo: { label: "To Do", color: "text-white/70" },
  in_progress: { label: "In Progress", color: "text-yellow-400" },
  done: { label: "Done", color: "text-green-400" },
  blocked: { label: "Blocked", color: "text-red-400" },
  paused: { label: "Paused", color: "text-gray-400" },
};

export default function MissionControlDashboard() {
  const { tasks, toggleTask, updateTaskStatus, addTask, getProjectProgress, getTasksByProject } = useMissionControl();
  const [selectedItem, setSelectedItem] = useState<string>("sitemente");
  const [filter, setFilter] = useState<TaskStatus | "all">("all");
  const [expandedCategories, setExpandedCategories] = useState<string[]>(["projects"]);
  const [searchQuery, setSearchQuery] = useState("");
  const [showAddTask, setShowAddTask] = useState(false);
  const [newTaskTitle, setNewTaskTitle] = useState("");
  const [newTaskProject, setNewTaskProject] = useState("sitemente");

  // Keyboard shortcuts
  useEffect(() => {
    const handleKeyDown = (e: KeyboardEvent) => {
      if (e.key === "/" && !e.ctrlKey && !e.metaKey) {
        const target = e.target as HTMLElement;
        if (target.tagName !== "INPUT" && target.tagName !== "TEXTAREA") {
          e.preventDefault();
          document.getElementById("search-input")?.focus();
        }
      }
      if (e.key === "n" && (e.ctrlKey || e.metaKey)) {
        e.preventDefault();
        setShowAddTask(true);
      }
      if (e.key === "Escape") {
        setShowAddTask(false);
        setSearchQuery("");
      }
    };
    window.addEventListener("keydown", handleKeyDown);
    return () => window.removeEventListener("keydown", handleKeyDown);
  }, []);

  // Find selected item
  let selectedCategory = sidebarCategories.find(c => c.items.some(i => i.id === selectedItem));
  let currentItem = selectedCategory?.items.find(i => i.id === selectedItem);
  
  const projectTasks = currentItem?.category === "projects" ? getTasksByProject(selectedItem as any) : tasks;
  const filteredTasks = filter === "all" ? projectTasks : projectTasks.filter((t) => t.status === filter);
  const searchedTasks = searchQuery 
    ? filteredTasks.filter(t => t.title.toLowerCase().includes(searchQuery.toLowerCase()))
    : filteredTasks;
  const progress = currentItem?.category === "projects" ? getProjectProgress(selectedItem as any) : 0;

  const toggleCategory = (catId: string) => {
    setExpandedCategories(prev => prev.includes(catId) ? prev.filter(id => id !== catId) : [...prev, catId]);
  };

  const collapseAll = () => setExpandedCategories([]);

  // Today's focus
  const todayTasks = projectTasks.filter(t => t.priority === "critical" || t.status === "in_progress").slice(0, 3);

  // Export function
  const exportTasks = () => {
    const data = JSON.stringify(projectTasks, null, 2);
    const blob = new Blob([data], { type: "application/json" });
    const url = URL.createObjectURL(blob);
    const a = document.createElement("a");
    a.href = url;
    a.download = `tasks-${new Date().toISOString().split("T")[0]}.json`;
    a.click();
  };

  // Add task
  const handleAddTask = () => {
    if (!newTaskTitle.trim()) return;
    addTask({ title: newTaskTitle, description: "", status: "todo", priority: "medium", project: newTaskProject as any });
    setShowAddTask(false);
    setNewTaskTitle("");
  };

  // Render functions
  const renderSidebar = () => (
    <aside className="w-64 border-r border-white/10 bg-[#1a1625] p-4">
      <div className="flex items-center gap-3 mb-6 pb-4 border-b border-white/10">
        <div className="w-10 h-10 rounded-xl bg-brand-pink flex items-center justify-center text-xl">👁️</div>
        <div><h1 className="font-bold">Mission Control</h1><p className="text-xs text-white/50">Horus AI Assistant</p></div>
      </div>
      <nav className="space-y-1">
        {sidebarCategories.map((category) => (
          <div key={category.id}>
            <button onClick={() => toggleCategory(category.id)} className="w-full flex items-center justify-between px-3 py-2 rounded-lg text-sm font-medium text-white/70 hover:bg-white/5 hover:text-white transition">
              <span className="flex items-center gap-2"><span>{category.icon}</span><span>{category.name}</span></span>
              <span className={`transition ${expandedCategories.includes(category.id) ? "rotate-90" : ""}`}>▶</span>
            </button>
            {expandedCategories.includes(category.id) && (
              <div className="ml-4 mt-1 space-y-1">
                {category.items.map((item) => (
                  <button key={item.id} onClick={() => setSelectedItem(item.id)} className={`w-full flex items-center gap-2 px-3 py-2 rounded-lg text-sm transition ${selectedItem === item.id ? "bg-white/10 text-white border border-white/20" : "text-white/60 hover:bg-white/5 hover:text-white"}`}>
                    <span>{item.icon}</span><span>{item.name}</span>
                  </button>
                ))}
              </div>
            )}
          </div>
        ))}
      </nav>
      <div className="mt-6 pt-4 border-t border-white/10">
        <p className="text-xs text-white/40 uppercase mb-2 px-3">Quick</p>
        <a href="/" className="flex items-center gap-2 px-3 py-2 rounded-lg text-sm text-white/60 hover:bg-white/5 hover:text-white transition">🏠 SiteMente Site</a>
        <button onClick={collapseAll} className="w-full flex items-center gap-2 px-3 py-2 rounded-lg text-sm text-white/60 hover:bg-white/5 hover:text-white transition">⊖ Collapse All</button>
      </div>
    </aside>
  );

  const renderHeader = () => (
    <header className="flex items-center justify-between mb-6 pb-4 border-b border-white/10">
      <div className="flex items-center gap-4">
        <button onClick={() => { setSelectedItem("sitemente"); setExpandedCategories(["projects"]); }} className="w-10 h-10 rounded-xl bg-brand-pink flex items-center justify-center text-xl hover:bg-[#ff7bc0] transition">👁️</button>
        <div>
          <h2 className="text-xl font-bold flex items-center gap-2"><span>{currentItem?.icon}</span><span>{currentItem?.name}</span></h2>
          <p className="text-sm text-white/50">{currentItem?.category === "projects" ? `${progress}% complete` : `${tasks.length} total tasks`}</p>
        </div>
      </div>
      {currentItem?.category === "projects" && (
        <div className="h-12 w-12 rounded-full border-4 border-brand-pink bg-white/10">
          <svg className="h-full w-full -rotate-90" viewBox="0 0 36 36">
            <circle cx="18" cy="18" r="16" fill="none" stroke="currentColor" strokeWidth="3" className="text-white/20" />
            <circle cx="18" cy="18" r="16" fill="none" stroke="currentColor" strokeWidth="3" strokeDasharray={`${progress}, 100`} className="text-brand-pink" />
          </svg>
        </div>
      )}
    </header>
  );

  const renderContent = () => {
    const category = currentItem?.category;
    if (category === "chat") return <div className="rounded-xl border border-white/10 bg-white/5 p-6"><VoiceChat /></div>;
    if (category === "council") return <div className="rounded-xl border border-white/10 bg-white/5 p-6"><AIManagement /></div>;
    if (category === "calendar") return (
      <div className="space-y-4">
        <div className="rounded-xl border border-white/10 bg-white/5 p-6">
          <h3 className="text-lg font-semibold mb-4">📅 Morning Brief</h3>
          <p className="text-white/60 mb-4">Daily intelligence at 6am CET</p>
          <a href="/morning-brief" className="inline-flex items-center gap-2 px-4 py-2 bg-brand-pink rounded-lg text-sm font-medium hover:bg-[#ff7bc0] transition">☀️ Open Calendar</a>
        </div>
        <VoiceChat />
      </div>
    );
    if (category === "memory") return (
      <div className="rounded-xl border border-white/10 bg-white/5 p-6">
        <h3 className="text-lg font-semibold mb-4">🧠 Memory & Logs</h3>
        <p className="text-white/60 mb-4">Session history and daily logs</p>
        <div className="space-y-2 text-sm text-white/70"><p>Memory is stored in:</p><ul className="text-white/50 space-y-1"><li>• localStorage (browser)</li><li>• GitHub repo (daily commits)</li><li>• MEMORY.md (curated)</li></ul></div>
      </div>
    );
    return renderTasksView();
  };

  const renderTasksView = () => (
    <>
      {todayTasks.length > 0 && (
        <div className="mb-6 p-4 rounded-xl border border-brand-pink/30 bg-brand-pink/10">
          <p className="text-xs text-brand-pink font-medium mb-2">🎯 TODAY'S FOCUS</p>
          <div className="space-y-2">{todayTasks.map(task => (
            <div key={task.id} className="flex items-center gap-2 text-sm">
              <span className={`w-2 h-2 rounded-full ${task.status === "in_progress" ? "bg-yellow-400" : "bg-red-400"}`} />
              <span className="truncate">{task.title}</span>
            </div>
          ))}</div>
        </div>
      )}
      <div className="flex items-center gap-3 mb-4">
        <div className="flex-1 relative">
          <span className="absolute left-3 top-1/2 -translate-y-1/2 text-white/40">🔍</span>
          <input id="search-input" type="text" value={searchQuery} onChange={(e) => setSearchQuery(e.target.value)} placeholder="Search tasks... (press /)" className="w-full bg-white/10 border border-white/20 rounded-lg pl-9 pr-4 py-2 text-sm placeholder:text-white/40 focus:outline-none focus:border-brand-pink" />
        </div>
        <button onClick={() => setShowAddTask(!showAddTask)} className="px-4 py-2 bg-brand-pink rounded-lg text-sm font-medium hover:bg-[#ff7bc0] transition">+ Add</button>
        <button onClick={exportTasks} className="px-3 py-2 bg-white/10 rounded-lg text-sm hover:bg-white/20 transition">📥</button>
      </div>
      {showAddTask && (
        <div className="mb-4 p-4 rounded-xl border border-brand-pink/30 bg-brand-pink/5">
          <input type="text" value={newTaskTitle} onChange={(e) => setNewTaskTitle(e.target.value)} placeholder="New task title..." className="w-full bg-white/10 border border-white/20 rounded-lg px-4 py-2 text-sm placeholder:text-white/40 focus:outline-none focus:border-brand-pink mb-3" autoFocus onKeyDown={(e) => e.key === "Enter" && handleAddTask()} />
          <div className="flex items-center gap-2">
            <select value={newTaskProject} onChange={(e) => setNewTaskProject(e.target.value)} className="bg-white/10 border border-white/20 rounded-lg px-3 py-1.5 text-sm">
              <option value="sitemente">SiteMente</option><option value="holacompi">HolaCompi</option><option value="infrastructure">Infrastructure</option>
            </select>
            <button onClick={handleAddTask} className="px-4 py-1.5 bg-brand-pink rounded-lg text-sm font-medium">Add Task</button>
            <button onClick={() => setShowAddTask(false)} className="px-3 py-1.5 text-sm text-white/60 hover:text-white">Cancel</button>
          </div>
        </div>
      )}
      <div className="mb-4 grid grid-cols-4 gap-3">
        {(["todo", "in_progress", "done", "blocked"] as TaskStatus[]).map((status) => {
          const count = projectTasks.filter((t) => t.status === status).length;
          const config = statusConfig[status];
          return (
            <button key={status} onClick={() => setFilter(filter === status ? "all" : status)} className={`rounded-xl border p-3 text-center transition ${filter === status ? "border-white/40 bg-white/10" : "border-white/10 bg-white/5 hover:border-white/20"}`}>
              <p className={`text-xl font-bold ${config.color}`}>{count}</p>
              <p className="text-xs text-white/50">{config.label}</p>
            </button>
          );
        })}
      </div>
      <div className="rounded-xl border border-white/10 bg-white/5">
        <div className="border-b border-white/10 px-4 py-3">
          <div className="flex items-center justify-between">
            <h2 className="font-semibold">{currentItem?.name || "Tasks"}{searchQuery && <span className="ml-2 text-white/50 text-sm">({searchedTasks.length} results)</span>}</h2>
            <p className="text-sm text-white/50">{filteredTasks.filter((t) => t.status === "done").length} / {filteredTasks.length} done</p>
          </div>
        </div>
        <div className="divide-y divide-white/5 max-h-[500px] overflow-y-auto">
          {searchedTasks.map((task) => {
            const config = statusConfig[task.status];
            return (
              <div key={task.id} className={`flex items-center gap-3 px-4 py-3 transition hover:bg-white/5 ${task.status === "done" ? "opacity-50" : ""}`}>
                <button onClick={() => toggleTask(task.id)} className={`flex-shrink-0 w-5 h-5 rounded-full border-2 flex items-center justify-center transition ${task.status === "done" ? "border-green-500 bg-green-500 text-white" : "border-white/30 hover:border-white/50"}`}>
                  {task.status === "done" && <svg className="w-3 h-3" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={3} d="M5 13l4 4L19 7" /></svg>}
                </button>
                <div className="flex-1 min-w-0"><p className={`text-sm font-medium truncate ${task.status === "done" ? "line-through text-white/50" : ""}`}>{task.title}</p></div>
                {task.priority === "critical" && <span className="px-2 py-0.5 rounded-full bg-red-500/20 text-red-400 text-xs">CRITICAL</span>}
                <select value={task.status} onChange={(e) => updateTaskStatus(task.id, e.target.value as TaskStatus)} className="text-xs bg-transparent border border-white/20 rounded px-2 py-1">
                  <option value="todo">To Do</option><option value="in_progress">In Progress</option><option value="done">Done</option><option value="blocked">Blocked</option>
                </select>
              </div>
            );
          })}
        </div>
        {searchedTasks.length === 0 && <div className="px-4 py-8 text-center text-white/50 text-sm">No tasks match the current filter.</div>}
      </div>
    </>
  );

  return (
    <div className="min-h-screen bg-[#1a1625] text-white flex">
      {renderSidebar()}
      <main className="flex-1 p-6 overflow-y-auto">
        {renderHeader()}
        {renderContent()}
      </main>
    </div>
  );
}