"use client"

import { useEffect, useState, useMemo } from "react"
import { useRouter } from "next/navigation"
import Image from "next/image"
import Link from "next/link"
import { Button } from "@/components/ui/button"
import { SearchFilter } from "@/components/dashboard/search-filter"
import { formatPrice } from "@/lib/calculations"
import { type StoredQuote, type QuoteStatus } from "@/lib/db"
import { LogOut, LayoutDashboard, Loader2, ExternalLink } from "lucide-react"

const STATUS_LABELS: Record<QuoteStatus, { label: string; className: string }> = {
  new: { label: "Ny", className: "bg-blue-100 text-blue-700" },
  contacted: { label: "Kontaktet", className: "bg-amber-100 text-amber-700" },
  accepted: { label: "Accepteret", className: "bg-green-100 text-green-700" },
  rejected: { label: "Afvist", className: "bg-gray-100 text-gray-500" },
}

function formatDate(dateString: string): string {
  return new Date(dateString).toLocaleDateString("da-DK", {
    day: "numeric",
    month: "short",
    year: "numeric",
  })
}

export default function HistorikPage() {
  const router = useRouter()
  const [quotes, setQuotes] = useState<StoredQuote[]>([])
  const [loading, setLoading] = useState(true)
  const [search, setSearch] = useState("")

  useEffect(() => {
    fetchQuotes()
  }, [])

  async function fetchQuotes() {
    try {
      const res = await fetch("/api/quotes")
      if (!res.ok) {
        if (res.status === 401) {
          router.push("/intern/login")
          return
        }
        throw new Error("Failed to fetch quotes")
      }
      const data = await res.json()
      setQuotes(data.quotes)
    } catch {
      // fetch failed
    } finally {
      setLoading(false)
    }
  }

  async function handleLogout() {
    try {
      await fetch("/api/auth/logout", { method: "POST" })
      router.push("/intern/login")
      router.refresh()
    } catch {
      // logout failed
    }
  }

  const filteredQuotes = useMemo(() => {
    if (!search.trim()) return quotes

    const term = search.toLowerCase()
    return quotes.filter(
      (q) =>
        q.customerName.toLowerCase().includes(term) ||
        q.customerEmail.toLowerCase().includes(term) ||
        q.postalCode.includes(term) ||
        q.id.toString().includes(term)
    )
  }, [quotes, search])

  if (loading) {
    return (
      <main className="flex min-h-screen items-center justify-center bg-muted/30">
        <Loader2 className="h-8 w-8 animate-spin text-muted-foreground" />
      </main>
    )
  }

  return (
    <main className="min-h-screen bg-muted/30">
      {/* Header */}
      <header className="sticky top-0 z-10 border-b bg-white">
        <div className="container mx-auto flex items-center justify-between px-4 py-3">
          <div className="flex items-center gap-4">
            <Link href="/">
              <Image
                src="/foam-king-logo.png"
                alt="Foam King"
                width={120}
                height={48}
                className="h-10 w-auto"
              />
            </Link>
            <h1 className="hidden text-lg font-semibold sm:block">Historik</h1>
          </div>

          <div className="flex items-center gap-2">
            <Link href="/intern">
              <Button variant="ghost" size="sm">
                <LayoutDashboard className="mr-2 h-4 w-4" />
                <span className="hidden sm:inline">Dashboard</span>
              </Button>
            </Link>
            <Button variant="ghost" size="sm" onClick={handleLogout}>
              <LogOut className="mr-2 h-4 w-4" />
              <span className="hidden sm:inline">Log ud</span>
            </Button>
          </div>
        </div>
      </header>

      {/* Main content */}
      <div className="container mx-auto px-4 py-6">
        {/* Search and stats */}
        <div className="mb-6 flex flex-col gap-4 sm:flex-row sm:items-center sm:justify-between">
          <div className="max-w-md flex-1">
            <SearchFilter value={search} onChange={setSearch} />
          </div>
          <div className="text-sm text-muted-foreground">
            {filteredQuotes.length} tilbud
            {search && ` (af ${quotes.length})`}
          </div>
        </div>

        {/* Table */}
        <div className="overflow-hidden rounded-xl border bg-white shadow-sm">
          <div className="overflow-x-auto">
            <table className="w-full">
              <thead>
                <tr className="border-b bg-muted/50">
                  <th className="px-4 py-3 text-left text-sm font-medium text-muted-foreground">
                    #
                  </th>
                  <th className="px-4 py-3 text-left text-sm font-medium text-muted-foreground">
                    Kunde
                  </th>
                  <th className="hidden px-4 py-3 text-left text-sm font-medium text-muted-foreground md:table-cell">
                    Lokation
                  </th>
                  <th className="hidden px-4 py-3 text-left text-sm font-medium text-muted-foreground sm:table-cell">
                    Areal
                  </th>
                  <th className="px-4 py-3 text-left text-sm font-medium text-muted-foreground">
                    Pris
                  </th>
                  <th className="px-4 py-3 text-left text-sm font-medium text-muted-foreground">
                    Status
                  </th>
                  <th className="hidden px-4 py-3 text-left text-sm font-medium text-muted-foreground lg:table-cell">
                    Dato
                  </th>
                  <th className="px-4 py-3 text-right text-sm font-medium text-muted-foreground"></th>
                </tr>
              </thead>
              <tbody>
                {filteredQuotes.map((quote) => {
                  const slug = `${quote.postalCode}-${quote.id}`
                  const status = STATUS_LABELS[quote.status]
                  return (
                    <tr key={quote.id} className="border-b last:border-0 hover:bg-muted/30">
                      <td className="px-4 py-3 text-sm text-muted-foreground">{quote.id}</td>
                      <td className="px-4 py-3">
                        <div className="font-medium">{quote.customerName}</div>
                        <div className="text-sm text-muted-foreground">{quote.customerEmail}</div>
                      </td>
                      <td className="hidden px-4 py-3 text-sm md:table-cell">
                        {quote.postalCode}
                        {quote.address && (
                          <span className="text-muted-foreground">, {quote.address}</span>
                        )}
                      </td>
                      <td className="hidden px-4 py-3 text-sm sm:table-cell">{quote.area} m²</td>
                      <td className="px-4 py-3 font-medium">
                        {quote.totalInclVat ? formatPrice(Math.round(quote.totalInclVat)) : "—"}
                      </td>
                      <td className="px-4 py-3">
                        <span
                          className={`inline-block rounded-full px-2 py-0.5 text-xs font-medium ${status.className}`}
                        >
                          {status.label}
                        </span>
                      </td>
                      <td className="hidden px-4 py-3 text-sm text-muted-foreground lg:table-cell">
                        {formatDate(quote.createdAt)}
                      </td>
                      <td className="px-4 py-3 text-right">
                        <a
                          href={`/tilbud/${slug}`}
                          target="_blank"
                          rel="noopener noreferrer"
                          className="inline-flex items-center gap-1 text-sm text-primary hover:underline"
                        >
                          Åbn
                          <ExternalLink className="h-3 w-3" />
                        </a>
                      </td>
                    </tr>
                  )
                })}
              </tbody>
            </table>
          </div>

          {filteredQuotes.length === 0 && (
            <div className="py-12 text-center text-muted-foreground">
              {search ? "Ingen tilbud matcher søgningen" : "Ingen tilbud endnu"}
            </div>
          )}
        </div>
      </div>
    </main>
  )
}