import { NextResponse } from "next/server"
import { and, eq } from "drizzle-orm"
import { db } from "@/lib/db"
import { properties } from "@/lib/db/schema"
import { getSessionUser } from "@/lib/session"
import { propertySchema } from "@/lib/validations"
import { getEffectiveOwnerId, getAccountContext } from "@/lib/account"
import { geocodeAddress } from "@/lib/geocoding"

export async function GET(_: Request, { params }: { params: Promise<{ id: string }> }) {
  const user = await getSessionUser()
  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 })

  const ownerId = await getEffectiveOwnerId(user.id)

  const { id } = await params
  const data = await db.query.properties.findFirst({
    where: and(eq(properties.id, id), eq(properties.user_id, ownerId)),
    with: { units: {} },
  })

  if (!data) return NextResponse.json({ error: "Not found" }, { status: 404 })
  return NextResponse.json(data)
}

export async function PATCH(request: Request, { params }: { params: Promise<{ id: string }> }) {
  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 { id } = await params
  const body = await request.json()
  const parsed = propertySchema.partial().safeParse(body)
  if (!parsed.success) return NextResponse.json({ error: parsed.error.flatten() }, { status: 400 })

  // Re-geocode only when an address field actually changed. Merge with the
  // existing row so a partial update still geocodes the complete address. Keep
  // the old coordinates if geocoding fails (never overwrite good data with null).
  const addressKeys = ["address_line1", "address_line2", "city", "state", "postal_code", "country"] as const
  let coords: { latitude: number; longitude: number } | undefined
  if (addressKeys.some((k) => k in parsed.data)) {
    const existing = await db.query.properties.findFirst({
      where: and(eq(properties.id, id), eq(properties.user_id, ownerId)),
      columns: { address_line1: true, address_line2: true, city: true, state: true, postal_code: true, country: true },
    })
    if (existing) {
      const geo = await geocodeAddress({ ...existing, ...parsed.data })
      if (geo) coords = geo
    }
  }

  try {
    const [data] = await db
      .update(properties)
      .set({ ...parsed.data, ...(coords ?? {}) })
      .where(and(eq(properties.id, id), eq(properties.user_id, ownerId)))
      .returning()

    return NextResponse.json(data)
  } catch (e) {
    return NextResponse.json({ error: (e as Error).message }, { status: 500 })
  }
}

export async function DELETE(_: Request, { params }: { params: Promise<{ id: string }> }) {
  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 { id } = await params
  try {
    await db.delete(properties).where(and(eq(properties.id, id), eq(properties.user_id, ownerId)))
    return NextResponse.json({ success: true })
  } catch (e) {
    return NextResponse.json({ error: (e as Error).message }, { status: 500 })
  }
}
