"use server"

import { revalidatePath } from "next/cache"
import { and, eq } from "drizzle-orm"
import { db } from "@/lib/db"
import { leases } from "@/lib/db/schema"
import { getSessionUser } from "@/lib/session"
import { getAccountContext } from "@/lib/account"
import { keyBelongsToOwner } from "@/lib/storage"
import {
  sendLeaseForSignature,
  getAdapter,
  saveEsignConnection,
  disconnectEsign,
  type ESignProvider,
} from "@/lib/esign"

async function ownerGuard() {
  const user = await getSessionUser()
  if (!user) throw new Error("Unauthorized")
  const ctx = await getAccountContext(user.id)
  if (!ctx.isOwner) throw new Error("Only the account owner can manage integrations")
  return ctx
}

export async function sendLeaseForSignatureAction(leaseId: string, provider: string) {
  const user = await getSessionUser()
  if (!user) throw new Error("Unauthorized")
  const ctx = await getAccountContext(user.id)
  if (!ctx.canWrite) throw new Error("You don't have permission to do that")
  if (!getAdapter(provider)) throw new Error("Unknown provider")
  await sendLeaseForSignature(ctx.ownerId, leaseId, provider as ESignProvider)
  revalidatePath(`/leases/${leaseId}`)
  return { ok: true }
}

/** Connect Dropbox Sign by validating and storing the landlord's API key. */
export async function connectDropboxSign(apiKey: string) {
  const ctx = await ownerGuard()
  const adapter = getAdapter("dropbox_sign")
  if (!adapter) throw new Error("Unknown provider")
  const tokens = await adapter.connectApiKey(typeof apiKey === "string" ? apiKey : "")
  await saveEsignConnection(ctx.ownerId, "dropbox_sign", tokens)
  revalidatePath("/settings/integrations")
  return { ok: true, accountName: tokens.accountName }
}

export async function disconnectEsignAction(provider: string) {
  const ctx = await ownerGuard()
  if (!getAdapter(provider)) throw new Error("Unknown provider")
  await disconnectEsign(ctx.ownerId, provider as ESignProvider)
  revalidatePath("/settings/integrations")
  return { ok: true }
}

/**
 * Attach an already-uploaded document (via /api/upload) to a lease. Validates
 * the file belongs to the caller's namespace to prevent cross-tenant refs.
 */
export async function setLeaseDocument(leaseId: string, fileUrl: string) {
  const user = await getSessionUser()
  if (!user) throw new Error("Unauthorized")
  const ctx = await getAccountContext(user.id)
  if (!ctx.canWrite) throw new Error("You don't have permission to do that")

  const prefix = "/api/files/"
  if (typeof fileUrl !== "string" || !fileUrl.startsWith(prefix)) throw new Error("Invalid document reference")
  if (!keyBelongsToOwner(fileUrl.slice(prefix.length), ctx.ownerId)) throw new Error("Invalid document reference")

  const [row] = await db
    .update(leases)
    .set({ document_url: fileUrl })
    .where(and(eq(leases.id, leaseId), eq(leases.user_id, ctx.ownerId)))
    .returning({ id: leases.id })
  if (!row) throw new Error("Lease not found")

  revalidatePath(`/leases/${leaseId}`)
  return { ok: true, url: fileUrl }
}
