import { useEffect, useState } from 'react'
import { Command } from 'cmdk'
import { useNavigate } from 'react-router-dom'
import { Search, Monitor, Moon, Sun, Laptop, Palette } from 'lucide-react'
import { useAppStore } from '@/store/app'
import { useAuthStore } from '@/store/auth'
import './cmdk.css' // We'll add some styles for cmdk

export default function CommandPalette() {
  const { cmdKOpen, setCmdKOpen, setThemeHue } = useAppStore()
  const menus = useAuthStore(s => s.menus)
  const navigate = useNavigate()
  const [theme, setTheme] = useState(document.documentElement.classList.contains('dark') ? 'dark' : 'light')

  useEffect(() => {
    const down = (e: KeyboardEvent) => {
      if (e.key === 'k' && (e.metaKey || e.ctrlKey)) {
        e.preventDefault()
        setCmdKOpen(!cmdKOpen)
      }
    }
    document.addEventListener('keydown', down)
    return () => document.removeEventListener('keydown', down)
  }, [cmdKOpen, setCmdKOpen])

  const runCommand = (command: () => void) => {
    setCmdKOpen(false)
    command()
  }

  const toggleTheme = (mode: 'light' | 'dark' | 'system') => {
    if (mode === 'dark') {
      document.documentElement.classList.add('dark')
      setTheme('dark')
    } else if (mode === 'light') {
      document.documentElement.classList.remove('dark')
      setTheme('light')
    } else {
      if (window.matchMedia('(prefers-color-scheme: dark)').matches) {
        document.documentElement.classList.add('dark')
        setTheme('dark')
      } else {
        document.documentElement.classList.remove('dark')
        setTheme('light')
      }
    }
  }

  // Flatten menus for search
  const flatMenus: { title: string, path: string }[] = []
  const flatten = (items: any[]) => {
    items?.forEach(i => {
      if (i.path && !i.children?.length && i.path !== '/dashboard') {
        flatMenus.push({ title: i.title || i.name, path: i.path })
      }
      if (i.children) flatten(i.children)
    })
  }
  if (menus) flatten(menus)

  return (
    <Command.Dialog open={cmdKOpen} onOpenChange={setCmdKOpen} label="Global Command Menu" className="cmdk-dialog glass-panel">
      <div className="flex items-center px-4 border-b border-white/10 dark:border-white/5">
        <Search className="w-5 h-5 text-muted-foreground mr-3" />
        <Command.Input placeholder="搜索菜单，或输入命令..." className="w-full bg-transparent border-0 h-14 text-sm outline-none focus:outline-none focus-visible:ring-0 focus-visible:outline-none placeholder:text-muted-foreground text-foreground" />
      </div>

      <Command.List className="max-h-[300px] overflow-y-auto p-2 scrollbar-none">
        <Command.Empty className="py-6 text-center text-sm text-muted-foreground">没找到相关内容.</Command.Empty>

        <Command.Group heading="页面导航" className="text-xs font-medium text-muted-foreground mb-1 px-2 py-1">
          <Command.Item onSelect={() => runCommand(() => navigate('/dashboard'))} className="flex items-center px-3 py-2.5 text-sm rounded-lg cursor-pointer transition-colors aria-selected:bg-primary/10 aria-selected:text-primary text-foreground mt-1">
            <Monitor className="w-4 h-4 mr-3" /> 仪表盘
          </Command.Item>
          {flatMenus.map(m => (
            <Command.Item key={m.path} onSelect={() => runCommand(() => navigate(m.path))} className="flex items-center px-3 py-2.5 text-sm rounded-lg cursor-pointer transition-colors aria-selected:bg-primary/10 aria-selected:text-primary text-foreground mt-1">
              <Search className="w-4 h-4 mr-3 opacity-50" /> {m.title}
            </Command.Item>
          ))}
        </Command.Group>

        <Command.Group heading="主题模式" className="text-xs font-medium text-muted-foreground mt-4 mb-1 px-2 py-1">
          <Command.Item onSelect={() => runCommand(() => toggleTheme('light'))} className="flex items-center px-3 py-2.5 text-sm rounded-lg cursor-pointer transition-colors aria-selected:bg-primary/10 aria-selected:text-primary text-foreground mt-1">
            <Sun className="w-4 h-4 mr-3" /> 浅色模式
          </Command.Item>
          <Command.Item onSelect={() => runCommand(() => toggleTheme('dark'))} className="flex items-center px-3 py-2.5 text-sm rounded-lg cursor-pointer transition-colors aria-selected:bg-primary/10 aria-selected:text-primary text-foreground mt-1">
            <Moon className="w-4 h-4 mr-3" /> 深色模式
          </Command.Item>
          <Command.Item onSelect={() => runCommand(() => toggleTheme('system'))} className="flex items-center px-3 py-2.5 text-sm rounded-lg cursor-pointer transition-colors aria-selected:bg-primary/10 aria-selected:text-primary text-foreground mt-1">
            <Laptop className="w-4 h-4 mr-3" /> 跟随系统
          </Command.Item>
        </Command.Group>

        <Command.Group heading="重置主题色" className="text-xs font-medium text-muted-foreground mt-4 mb-1 px-2 py-1">
          <div className="flex gap-2 px-3 py-2 mt-1">
            <button onClick={() => runCommand(() => setThemeHue('145'))} style={{ backgroundColor: 'oklch(0.55 0.12 145)' }} className="w-6 h-6 rounded-full ring-2 ring-transparent hover:ring-white/20 transition-all"></button>
            <button onClick={() => runCommand(() => setThemeHue('240'))} style={{ backgroundColor: 'oklch(0.55 0.12 240)' }} className="w-6 h-6 rounded-full ring-2 ring-transparent hover:ring-white/20 transition-all"></button>
            <button onClick={() => runCommand(() => setThemeHue('280'))} style={{ backgroundColor: 'oklch(0.55 0.12 280)' }} className="w-6 h-6 rounded-full ring-2 ring-transparent hover:ring-white/20 transition-all"></button>
            <button onClick={() => runCommand(() => setThemeHue('330'))} style={{ backgroundColor: 'oklch(0.55 0.12 330)' }} className="w-6 h-6 rounded-full ring-2 ring-transparent hover:ring-white/20 transition-all"></button>
            <button onClick={() => runCommand(() => setThemeHue('45'))} style={{ backgroundColor: 'oklch(0.65 0.18 45)' }} className="w-6 h-6 rounded-full ring-2 ring-transparent hover:ring-white/20 transition-all"></button>
          </div>
        </Command.Group>
      </Command.List>
    </Command.Dialog>
  )
}
