import Link from "next/link"
import { BookOpen, Search, Bell, Settings } from "lucide-react"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar"
import { useFamily } from "@/context/family-context"
import { useState, useRef, useEffect } from "react"
import { useRouter } from "next/navigation"

export function SiteHeader() {
  const { searchMembers, searchResults } = useFamily()
  const [searchQuery, setSearchQuery] = useState("")
  const [showResults, setShowResults] = useState(false)
  const searchRef = useRef<HTMLDivElement>(null)
  const router = useRouter()

  // 点击外部关闭搜索结果
  useEffect(() => {
    function handleClickOutside(event: MouseEvent) {
      if (searchRef.current && !searchRef.current.contains(event.target as Node)) {
        setShowResults(false)
      }
    }
    document.addEventListener("mousedown", handleClickOutside)
    return () => document.removeEventListener("mousedown", handleClickOutside)
  }, [])

  const handleSearch = (query: string) => {
    setSearchQuery(query)
    searchMembers(query)
    setShowResults(query.length > 0)
  }

  const handleSelectMember = (memberId: string) => {
    router.push(`/members/${memberId}`)
    setSearchQuery("")
    setShowResults(false)
  }

  return (
    <header className="sticky top-0 z-50 w-full border-b border-border/40 bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60">
      <div className="container mx-auto flex h-16 items-center px-4">
        <div className="mr-8 flex items-center gap-2">
          <div className="flex h-8 w-8 items-center justify-center rounded bg-primary text-primary-foreground">
            <BookOpen className="h-5 w-5" />
          </div>
          <span className="text-xl font-serif font-bold tracking-tight">华夏谱 (HuaXiaPu)</span>
        </div>

        <nav className="hidden md:flex items-center gap-6 text-sm font-medium text-muted-foreground">
          <Link
            href="/"
            className="transition-colors hover:text-foreground data-[active=true]:text-foreground data-[active=true]:font-semibold"
          >
            总览 (Overview)
          </Link>
          <Link href="/tree" className="transition-colors hover:text-foreground">
            族谱 (Tree)
          </Link>
          <Link href="/members" className="transition-colors hover:text-foreground">
            成员 (Members)
          </Link>
          <Link href="/timeline" className="transition-colors hover:text-foreground">
            大事记 (Timeline)
          </Link>
        </nav>

        <div className="ml-auto flex items-center gap-4">
          <div className="relative hidden sm:block" ref={searchRef}>
            <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
            <Input
              type="search"
              placeholder="搜索成员..."
              value={searchQuery}
              onChange={(e) => handleSearch(e.target.value)}
              className="h-9 w-64 rounded-full bg-muted pl-9 text-sm focus-visible:ring-primary"
            />
            
            {/* 搜索结果下拉框 */}
            {showResults && searchResults.length > 0 && (
              <div className="absolute top-full mt-2 w-full bg-background border border-border rounded-lg shadow-lg max-h-96 overflow-y-auto z-50">
                {searchResults.map((member) => (
                  <button
                    key={member.id}
                    onClick={() => handleSelectMember(member.id)}
                    className="w-full px-4 py-3 text-left hover:bg-muted transition-colors border-b border-border last:border-0"
                  >
                    <div className="flex items-center gap-3">
                      <div className="flex-1">
                        <div className="flex items-center gap-2">
                          <span className="font-medium">{member.fullName}</span>
                          <span className={`text-xs px-1.5 py-0.5 rounded ${member.gender === "male" ? "bg-blue-100 text-blue-700" : "bg-pink-100 text-pink-700"}`}>
                            {member.gender === "male" ? "男" : "女"}
                          </span>
                          <span className="text-xs text-muted-foreground">第{member.generation}世</span>
                        </div>
                        <p className="text-xs text-muted-foreground mt-1">
                          {member.birthDate && `生于 ${member.birthDate}`}
                          {member.birthPlace && ` · ${member.birthPlace}`}
                        </p>
                      </div>
                    </div>
                  </button>
                ))}
              </div>
            )}
            
            {/* 无结果提示 */}
            {showResults && searchQuery && searchResults.length === 0 && (
              <div className="absolute top-full mt-2 w-full bg-background border border-border rounded-lg shadow-lg p-4 text-center text-sm text-muted-foreground z-50">
                未找到匹配的成员
              </div>
            )}
          </div>

          <Button variant="ghost" size="icon" className="text-muted-foreground">
            <Bell className="h-5 w-5" />
            <span className="sr-only">Notifications</span>
          </Button>

          <Link href="/settings">
            <Button variant="ghost" size="icon" className="text-muted-foreground">
              <Settings className="h-5 w-5" />
              <span className="sr-only">Settings</span>
            </Button>
          </Link>

          <Avatar className="h-8 w-8 border border-border">
            <AvatarImage src="/placeholder-user.jpg" alt="User" />
            <AvatarFallback>李</AvatarFallback>
          </Avatar>
        </div>
      </div>
    </header>
  )
}