"use server";

import { redirect } from "next/navigation";
import { Query } from "node-appwrite";

import { DATABASE_ID, TABLES, type TenantPlan } from "./schema";
import { createAdminClient } from "./server";
import { requireRole, requireTenant } from "./tenant-guard";
import { getEffectivePlan } from "./plan-limits";
import { PLAN_CATALOG } from "./subscription-types";
import { getShopierPlanUrl, isShopierEnabled } from "../payments/shopier";
import { createPolarCheckout, isPolarEnabled } from "../payments/polar";

const PRO_VALIDITY_DAYS = 30;

function generateOrderId(): string {
  const t = Date.now().toString(36);
  const r = Math.random().toString(36).slice(2, 10);
  return `ord_${t}_${r}`;
}

// Webhook handler'larından da çağrılabilir — provider "polar" | "shopier" | "mock"
export async function activatePlanInDb(
  tenantId: string,
  plan: TenantPlan,
  provider: string,
): Promise<void> {
  const { tablesDB } = createAdminClient();

  // tenant_settings satırını bul
  const result = await tablesDB.listRows({
    databaseId: DATABASE_ID,
    tableId: TABLES.tenantSettings,
    queries: [Query.equal("tenantId", tenantId), Query.limit(1)],
  });
  const row = result.rows[0];
  if (!row) throw new Error(`tenant_settings bulunamadı: ${tenantId}`);

  const now = new Date();
  const expires = new Date(now.getTime() + PRO_VALIDITY_DAYS * 24 * 60 * 60 * 1000);

  await tablesDB.updateRow(DATABASE_ID, TABLES.tenantSettings, row.$id, {
    plan,
    planExpiresAt: expires.toISOString(),
    planProvider: provider,
  });
}

export async function deactivatePlanInDb(tenantId: string): Promise<void> {
  const { tablesDB } = createAdminClient();
  const result = await tablesDB.listRows({
    databaseId: DATABASE_ID,
    tableId: TABLES.tenantSettings,
    queries: [Query.equal("tenantId", tenantId), Query.limit(1)],
  });
  const row = result.rows[0];
  if (!row) return;
  await tablesDB.updateRow(DATABASE_ID, TABLES.tenantSettings, row.$id, {
    plan: "free",
    planExpiresAt: null,
    planProvider: null,
  });
}

// ── Mock checkout (geliştirme ortamı) ─────────────────────────────────────────

export async function startMockCheckoutAction(formData: FormData): Promise<void> {
  const plan = String(formData.get("plan") ?? "") as TenantPlan;
  if (plan !== "pro") throw new Error("Geçersiz plan.");

  const ctx = await requireTenant();
  requireRole(ctx, ["owner"]);

  // Mock: direkt aktive et
  await activatePlanInDb(ctx.tenantId, plan, "mock");
  redirect("/settings/billing?upgraded=1");
}

// ── Shopier checkout ───────────────────────────────────────────────────────────

export async function startShopierCheckoutAction(formData: FormData): Promise<void> {
  const plan = String(formData.get("plan") ?? "") as TenantPlan;
  if (plan !== "pro") throw new Error("Geçersiz plan.");

  const ctx = await requireTenant();
  requireRole(ctx, ["owner"]);

  const storeUrl = getShopierPlanUrl(plan);
  if (!storeUrl) throw new Error("Shopier mağaza URL'i ayarlanmamış.");

  // Shopier mağaza sayfasına yönlendir — ödeme tamamlanınca webhook gelir
  redirect(storeUrl);
}

// ── Polar checkout ─────────────────────────────────────────────────────────────

export async function startPolarCheckoutAction(formData: FormData): Promise<void> {
  const plan = String(formData.get("plan") ?? "") as TenantPlan;
  if (plan !== "pro") throw new Error("Geçersiz plan.");

  const ctx = await requireTenant();
  requireRole(ctx, ["owner"]);

  const catalog = PLAN_CATALOG[plan];
  const orderId = generateOrderId();
  const appUrl = process.env.APP_URL?.replace(/\/$/, "") ?? "http://localhost:3001";

  const checkout = await createPolarCheckout({
    orderId,
    tenantId: ctx.tenantId,
    userEmail: ctx.user.email,
    successUrl: `${appUrl}/settings/billing?upgraded=1`,
  });

  // orderId'yi tenant_settings'e geçici olarak kaydedebiliriz ama
  // minimal yaklaşımda metadata.tenant_id yeterli — webhook okur
  void catalog; // fiyat bilgisi ileride log için kullanılabilir
  redirect(checkout.url);
}

// ── Unified entry point ────────────────────────────────────────────────────────

export async function startCheckoutAction(formData: FormData): Promise<void> {
  if (isPolarEnabled()) return startPolarCheckoutAction(formData);
  if (isShopierEnabled()) return startShopierCheckoutAction(formData);
  return startMockCheckoutAction(formData);
}

// ── Downgrade ──────────────────────────────────────────────────────────────────

export async function downgradeToFreeAction(): Promise<void> {
  const ctx = await requireTenant();
  requireRole(ctx, ["owner"]);
  await deactivatePlanInDb(ctx.tenantId);
  redirect("/settings/billing?downgraded=1");
}

// ── Mevcut plan bilgisi ────────────────────────────────────────────────────────

export async function getCurrentPlanAction(): Promise<{
  plan: TenantPlan;
  expiresAt: string | null;
  provider: string | null;
}> {
  const ctx = await requireTenant();
  const plan = getEffectivePlan(ctx);
  return {
    plan,
    expiresAt: ctx.settings?.planExpiresAt ?? null,
    provider: ctx.settings?.planProvider ?? null,
  };
}