import { redirect } from "next/navigation"
import { eq, desc } from "drizzle-orm"
import { db } from "@/lib/db"
import { properties as propertiesTable } from "@/lib/db/schema"
import { getSessionUser } from "@/lib/session"
import Link from "next/link"
import { Building2, MapPin, BedDouble, ArrowRight, TrendingUp } from "lucide-react"
import { EmptyState } from "@/components/shared/empty-state"
import { formatCurrency, getOccupancyRate } from "@/lib/utils"

export const metadata = { title: "Properties" }

export default async function PropertiesPage() {
  const user = await getSessionUser()
  if (!user) redirect("/login")

  const properties = await db.query.properties.findMany({
    where: eq(propertiesTable.user_id, user.id),
    with: {
      units: { columns: { id: true, status: true, rent_amount: true } },
    },
    orderBy: desc(propertiesTable.created_at),
  })

  const totalMonthly = (properties ?? []).reduce((sum: number, p: any) => {
    return sum + (p.units ?? []).filter((u: any) => u.status === "occupied").reduce((s: number, u: any) => s + Number(u.rent_amount), 0)
  }, 0)

  return (
    <div className="space-y-6">
      {/* Page header */}
      <div className="flex items-end justify-between">
        <div>
          <h2 className="text-lg font-semibold text-white">Properties</h2>
          <p className="text-sm text-white/40 mt-0.5">
            {properties?.length ?? 0} {(properties?.length ?? 0) === 1 ? "property" : "properties"}
            {totalMonthly > 0 && <span className="ml-2 text-emerald-400">· {formatCurrency(totalMonthly)}/mo</span>}
          </p>
        </div>
      </div>

      {!properties?.length ? (
        <EmptyState
          icon={Building2}
          title="No properties yet"
          description="Add your first rental property to start managing tenants, rent, and maintenance."
          action={{ label: "Add property", href: "/properties/new" }}
        />
      ) : (
        <div className="grid gap-4 sm:grid-cols-2 xl:grid-cols-3">
          {(properties as any[]).map((property) => {
            const units = property.units ?? []
            const occupied = units.filter((u: any) => u.status === "occupied").length
            const totalUnits = units.length
            const occupancy = getOccupancyRate(occupied, totalUnits)
            const monthlyRent = units
              .filter((u: any) => u.status === "occupied")
              .reduce((sum: number, u: any) => sum + Number(u.rent_amount), 0)
            const potential = units.reduce((sum: number, u: any) => sum + Number(u.rent_amount), 0)

            const occupancyColor =
              occupancy === 100 ? "text-emerald-400" :
              occupancy >= 50   ? "text-amber-400"   :
              "text-red-400"

            const barColor =
              occupancy === 100 ? "bg-emerald-500" :
              occupancy >= 50   ? "bg-amber-500"   :
              "bg-red-500"

            return (
              <Link
                key={property.id}
                href={`/properties/${property.id}`}
                className="group relative rounded-2xl border border-white/[0.06] bg-[#16161f] p-5 transition-all duration-200 hover:border-indigo-500/30 hover:bg-[#1a1a2e] hover:shadow-xl hover:shadow-indigo-500/5"
              >
                {/* Top row */}
                <div className="flex items-start justify-between mb-4">
                  <div className="flex h-11 w-11 items-center justify-center rounded-xl bg-indigo-500/10 ring-1 ring-inset ring-indigo-500/20">
                    <Building2 className="h-5 w-5 text-indigo-400" />
                  </div>
                  <span className={`rounded-full px-2.5 py-0.5 text-xs font-semibold ${
                    occupancy === 100 ? "bg-emerald-500/10 text-emerald-400 ring-1 ring-emerald-500/20" :
                    occupancy >= 50   ? "bg-amber-500/10 text-amber-400 ring-1 ring-amber-500/20"   :
                    "bg-red-500/10 text-red-400 ring-1 ring-red-500/20"
                  }`}>
                    {occupancy}% full
                  </span>
                </div>

                {/* Name + address */}
                <div>
                  <h3 className="font-semibold text-white group-hover:text-indigo-200 transition-colors">{property.name}</h3>
                  <div className="mt-1 flex items-center gap-1 text-xs text-white/40">
                    <MapPin className="h-3 w-3 shrink-0" />
                    <span className="truncate">{property.address_line1 ? `${property.address_line1}, ` : ""}{property.city}{property.state ? `, ${property.state}` : ""}</span>
                  </div>
                </div>

                {/* Occupancy bar */}
                <div className="mt-4">
                  <div className="h-1 w-full rounded-full bg-white/[0.06]">
                    <div
                      className={`h-1 rounded-full transition-all ${barColor}`}
                      style={{ width: `${Math.max(occupancy, 2)}%` }}
                    />
                  </div>
                  <div className="mt-1 flex items-center justify-between text-[10px] text-white/30">
                    <span>{occupied} of {totalUnits} units occupied</span>
                    <span>{totalUnits - occupied} vacant</span>
                  </div>
                </div>

                {/* Stats */}
                <div className="mt-4 grid grid-cols-2 gap-3 border-t border-white/[0.06] pt-4">
                  <div>
                    <p className="text-xs text-white/30">Collected / mo</p>
                    <p className="mt-0.5 text-sm font-semibold text-white">{formatCurrency(monthlyRent)}</p>
                  </div>
                  <div>
                    <p className="text-xs text-white/30">Potential / mo</p>
                    <p className="mt-0.5 text-sm font-semibold text-white/60">{formatCurrency(potential)}</p>
                  </div>
                </div>

                {/* Hover arrow */}
                <div className="mt-3 flex items-center gap-1 text-xs text-indigo-400/0 group-hover:text-indigo-400/80 transition-all">
                  <span>View details</span>
                  <ArrowRight className="h-3 w-3" />
                </div>
              </Link>
            )
          })}
        </div>
      )}
    </div>
  )
}
