import { NextResponse } from "next/server"
import { and, asc, eq } from "drizzle-orm"
import { db } from "@/lib/db"
import { units } from "@/lib/db/schema"
import { getSessionUser } from "@/lib/session"
import { unitSchema } from "@/lib/validations"
import { ownsProperty } from "@/lib/db/ownership"
import { getEffectiveOwnerId, getAccountContext } from "@/lib/account"

export async function GET(request: Request) {
  const user = await getSessionUser()
  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 })

  const ownerId = await getEffectiveOwnerId(user.id)

  const { searchParams } = new URL(request.url)
  const propertyId = searchParams.get("property_id")

  const data = await db.query.units.findMany({
    where: and(
      eq(units.user_id, ownerId),
      propertyId ? eq(units.property_id, propertyId) : undefined
    ),
    with: {
      current_tenant: { columns: { first_name: true, last_name: true } },
    },
    orderBy: asc(units.unit_number),
  })

  return NextResponse.json(data)
}

export async function POST(request: Request) {
  const user = await getSessionUser()
  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 })

  const ctx = await getAccountContext(user.id)
  const ownerId = ctx.ownerId
  if (!ctx.canWrite) return NextResponse.json({ error: "Forbidden" }, { status: 403 })

  const body = await request.json()
  const parsed = unitSchema.safeParse(body)
  if (!parsed.success) return NextResponse.json({ error: parsed.error.flatten() }, { status: 400 })

  if (!(await ownsProperty(ownerId, parsed.data.property_id))) {
    return NextResponse.json({ error: "Invalid reference" }, { status: 403 })
  }

  const [data] = await db
    .insert(units)
    .values({ ...parsed.data, user_id: ownerId })
    .returning()

  return NextResponse.json(data, { status: 201 })
}