"use client"

import { useState, useEffect, useCallback } from "react"
import Image from "next/image"
import Link from "next/link"
import { usePathname } from "next/navigation"
import { useTranslations } from "next-intl"
import ThemeToggle from "@/components/ThemeToggle"
import { NAV_GROUPS, NAV_LINKS } from "@/lib/site-content"

function ChevronIcon() {
  return (
    <svg xmlns="http://www.w3.org/2000/svg" width="100%" viewBox="0 0 17 17" fill="none" className="squared-icon">
      <path d="M6.25391 3.45312L10.7458 8.01563L6.25391 12.5781" stroke="currentColor" strokeWidth="1.5" strokeLinecap="square" />
    </svg>
  )
}

function DropdownIcon() {
  return (
    <svg xmlns="http://www.w3.org/2000/svg" width="100%" viewBox="0 0 20 20" fill="none">
      <path d="M15.5 7.03847L10 12.9615L4.5 7.03847" stroke="currentColor" strokeWidth="1.5" strokeLinecap="square" />
    </svg>
  )
}

export default function Header() {
  const t = useTranslations("nav")
  const [mobileOpen, setMobileOpen] = useState(false)
  const [dropdownOpen, setDropdownOpen] = useState(false)
  const [scrolled, setScrolled] = useState(false)
  const pathname = usePathname()
  const closeMenus = useCallback(() => {
    setMobileOpen(false)
    setDropdownOpen(false)
  }, [])

  useEffect(() => {
    const onScroll = () => setScrolled(window.scrollY > 20)
    window.addEventListener("scroll", onScroll, { passive: true })
    return () => window.removeEventListener("scroll", onScroll)
  }, [])

  const toggleMobile = useCallback(() => setMobileOpen((v) => !v), [])

  return (
    <div
      className={`header-wrapper w-nav ${scrolled ? "header-scrolled" : ""}`}
      data-animation="default"
      data-easing2="ease"
      data-easing="ease"
      data-collapse="medium"
      role="banner"
      data-duration="300"
    >
      <div className="header-content">
        <div className="header-logo-wrapper">
          <div className="show-light-mode">
            <Link href="/" className="logo-link w-inline-block">
              <Image src="/assets/wubflow-shield-nocodexport-dev/68a342b7066c56fa60eb3af1/68a43b922d3d1ca923f36385_logo-icon-quantum-webflow-template.svg" width={54} height={54} alt="Logo" className="logo-icon" />
            </Link>
          </div>
          <div className="show-dark-mode">
            <Link href="/" className="logo-link w-inline-block">
              <Image src="/assets/wubflow-shield-nocodexport-dev/68a342b7066c56fa60eb3af1/68a73cf7c58867b86184dc28_logo-icon-quantum-webflow-template.svg" width={54} height={54} alt="Logo" className="logo-icon" />
            </Link>
          </div>
        </div>
        <div className="header-right-side">
          <nav
            role="navigation"
            className={`nav-menu w-nav-menu ${mobileOpen ? "w--open" : ""}`}
          >
            <ul role="list" className="list-nav-menu w-list-unstyled">
              {NAV_LINKS.map(({ href, label }) => (
                <li key={href} className="link-nav-item sibling-blur-item">
                  <Link
                    href={href}
                    className={`link w-inline-block ${pathname === href ? "w--current" : ""}`}
                    onClick={closeMenus}
                  >
                    <div className="link-icon-wrapper">
                      <div className="link-icon">
                        <ChevronIcon />
                      </div>
                    </div>
                    <div className="link-text">{label === "首页" ? t("home") : label === "产品定位" ? t("about") : label === "洞察" ? t("blog") : t("contact")}</div>
                  </Link>
                </li>
              ))}
              <li className="link-nav-item sibling-blur-item">
                <div
                  className={`header-dropdown w-dropdown ${dropdownOpen ? "w--open" : ""}`}
                  onMouseEnter={() => setDropdownOpen(true)}
                  onMouseLeave={() => setDropdownOpen(false)}
                >
                  <button
                    className="dropdown-toggle w-dropdown-toggle"
                    onClick={() => setDropdownOpen((v) => !v)}
                    aria-expanded={dropdownOpen}
                    type="button"
                  >
                    <div>{t("explore")}</div>
                    <div className="dropdown-icon">
                      <DropdownIcon />
                    </div>
                  </button>
                  {dropdownOpen && (
                    <nav className="dropdown-content-wrapper w-dropdown-list w--open">
                      <div className="card header-dropdown-card">
                        <div className="w-layout-grid header-dropdown-grid">
                          {NAV_GROUPS.map((group) => (
                            <div key={group.title}>
                              <div className="dropdown-title">{group.title === "产品" ? t("groups.product") : t("groups.content")}</div>
                              <div className="w-layout-grid pages-column">
                                {group.links.map(({ href, label }) => (
                                  <Link key={href} href={href} className="link w-inline-block" onClick={closeMenus}>
                                    <div className="link-icon-wrapper">
                                      <div className="link-icon"><ChevronIcon /></div>
                                    </div>
                                    <div className="link-text">{label === "首页" ? t("groupLinks.home") : label === "为什么是 DAL Code" ? t("groupLinks.whyDalCode") : label === "申请试用" ? t("groupLinks.applyTrial") : label === "产品洞察" ? t("groupLinks.insights") : t("groupLinks.buildingRoles")}</div>
                                  </Link>
                                ))}
                              </div>
                            </div>
                          ))}
                        </div>
                      </div>
                    </nav>
                  )}
                </div>
              </li>
              <li className="link-nav-item mbl-button">
                <Link href="/contact" className="primary-button w-inline-block" onClick={closeMenus}>
                  <div className="button-content">
                    <div>{t("applyTrial")}</div>
                    <div className="button-icon-wrapper primary">
                      <ChevronIcon />
                      <div className="button-icon-bg" />
                      <div className="button-icon-bg-inside" />
                    </div>
                  </div>
                </Link>
              </li>
            </ul>
          </nav>
          <div className="hidden-on-mobile-landscape">
            <div className="show-light-mode">
              <Link href="/contact" className="primary-button w-inline-block" onClick={closeMenus}>
                <div className="button-content">
                  <div>{t("applyTrial")}</div>
                  <div className="button-icon-wrapper primary">
                    <ChevronIcon />
                    <div className="button-icon-bg" />
                    <div className="button-icon-bg-inside" />
                  </div>
                </div>
              </Link>
            </div>
            <div className="show-dark-mode">
              <Link href="/contact" className="secondary-button w-inline-block" onClick={closeMenus}>
                <div className="button-content">
                  <div>{t("applyTrial")}</div>
                  <div className="button-icon-wrapper secondary">
                    <ChevronIcon />
                    <div className="button-icon-bg bg-neutral-800" />
                    <div className="button-icon-bg-inside bg-neutral-600" />
                  </div>
                </div>
              </Link>
            </div>
          </div>
          <ThemeToggle />
          <button
            className={`hamburger-menu w-nav-button ${mobileOpen ? "w--open" : ""}`}
            onClick={toggleMobile}
            aria-label={t("toggleMenu")}
            type="button"
          >
            <div className="hamburger-menu-flex">
              <div className="hamburger-menu-line top" />
              <div className="hamburger-menu-line bottom" />
            </div>
          </button>
        </div>
      </div>
      {mobileOpen && <div className="w-nav-overlay w--open" onClick={() => setMobileOpen(false)} />}
    </div>
  )
}