import { Types } from "mongoose";
import { afterAll, beforeAll, describe, expect, it } from "vitest";
import { AccountModel } from "@/models/account";
import { HouseholdModel } from "@/models/household";
import { TransactionModel } from "@/models/transaction";
import { budgetPeriod, periodOfDate, shiftMonth } from "@/shared/budget";
import { istanbulDayStart, todayIstanbul } from "@/shared/dates";
import { incomeItemsSchema } from "@/shared/schemas/budget";
import { setupSeededDb, teardownDb } from "@/test/seeded-db";
import { getDailyPlan, getIncomePlan, saveIncomeItems } from "./plan";
import { getBudget } from "./service";

let ids: Awaited<ReturnType<typeof setupSeededDb>>;
let cakir = "";
let ayse = "";
let emre = "";
let zeynep = "";
let fatma = "";
const today = todayIstanbul();
const month = periodOfDate(today);

beforeAll(async () => {
  ids = await setupSeededDb();
  cakir = ids.household("Çakır Ailesi");
  ayse = ids.user("ayse");
  emre = ids.user("emre");
  zeynep = ids.user("zeynep");
  fatma = ids.user("fatma");
});
afterAll(teardownDb);

async function income(
  date: string,
  amountMinor: number,
  status: "posted" | "planned",
  accountId?: Types.ObjectId,
) {
  const actor = new Types.ObjectId(ayse);
  const acc =
    accountId ??
    (await AccountModel.findOne({ householdId: cakir, name: "Ziraat Maaş" }).lean())!._id;
  await TransactionModel.create({
    householdId: new Types.ObjectId(cakir),
    type: "income",
    status,
    date: istanbulDayStart(date)!,
    accountId: acc,
    amountMinor,
    description: "Test gelir",
    recurringRuleId: status === "planned" ? new Types.ObjectId() : null,
    occurrenceIndex: status === "planned" ? 0 : null,
    createdBy: actor,
    updatedBy: actor,
  });
}

describe("gelir planı", () => {
  it("gerçekleşen + bekleyen planlı + elle eklenen = beklenen", async () => {
    const p0 = (await getIncomePlan(ayse, cakir, month))!;
    const { to } = budgetPeriod(month);
    await income(to, 3_000_00, "planned");
    expect(
      (
        await saveIncomeItems(
          ayse,
          cakir,
          incomeItemsSchema.parse({ month, items: [{ name: "Prim", amount: "5.000" }] }),
        )
      ).ok,
    ).toBe(true);
    const p = (await getIncomePlan(ayse, cakir, month))!;
    expect(p.pendingMinor).toBe(p0.pendingMinor + 3_000_00);
    expect(p.manual).toEqual([expect.objectContaining({ name: "Prim", amountMinor: 5_000_00 })]);
    expect(p.expectedMinor).toBe(p.actualMinor + p.pendingMinor + 5_000_00);
    expect(p.entries.some((e) => e.status === "planned" && e.amountMinor === 3_000_00)).toBe(true);
    // Elle eklenenler bütçe limitlerini bozmaz.
    expect((await getBudget(ayse, cakir, month))!.editor.limits).toBeTruthy();
  });

  it("gizli hesaba gelen gelir hane ayarına göre; izleyici yazamaz; başka hane göremez", async () => {
    const actor = new Types.ObjectId(emre);
    const secret = await AccountModel.create({
      householdId: new Types.ObjectId(cakir),
      name: "Emre Gizli Gelir",
      type: "bank",
      openingBalanceMinor: 0,
      openingDate: istanbulDayStart(shiftMonth(month, -2) + "-01")!,
      isPrivate: true,
      ownerUserId: actor,
      createdBy: actor,
      updatedBy: actor,
    });
    const a0 = (await getIncomePlan(ayse, cakir, month))!.actualMinor;
    await income(today, 1_000_00, "posted", secret._id);
    expect((await getIncomePlan(ayse, cakir, month))!.actualMinor).toBe(a0 + 1_000_00);
    await HouseholdModel.updateOne(
      { _id: cakir },
      { $set: { "settings.includePrivateAccountsInTotals": false } },
    );
    expect((await getIncomePlan(ayse, cakir, month))!.actualMinor).toBe(a0);
    await HouseholdModel.updateOne(
      { _id: cakir },
      { $set: { "settings.includePrivateAccountsInTotals": true } },
    );
    // Sahibi kendi gizli hesabını her zaman görür.
    expect((await getIncomePlan(emre, cakir, month))!.actualMinor).toBe(a0 + 1_000_00);

    expect(
      (await saveIncomeItems(zeynep, cakir, incomeItemsSchema.parse({ month, items: [] }))).ok,
    ).toBe(false);
    expect(await getIncomePlan(fatma, cakir, month)).toBeNull();
    expect(incomeItemsSchema.safeParse({ month, items: [{ name: "", amount: "1" }] }).success).toBe(
      false,
    );
    expect(
      incomeItemsSchema.safeParse({ month, items: [{ name: "X", amount: "0" }] }).success,
    ).toBe(false);
  });
});

describe("günlük plan", () => {
  it("plan toplamı bütçeye eşit; bugüne kadarki gerçekleşen bütçe motoruyla tutarlı; elde kalacak", async () => {
    const v = (await getDailyPlan(ayse, cakir))!;
    const b = (await getBudget(ayse, cakir))!;
    expect(v.month).toBe(month);
    expect(v.hasBudget).toBe(true);
    const last = v.plan.days.at(-1)!;
    expect(last.cumPlannedMinor).toBe(Math.max(b.totals.limitMinor, v.plan.fixedMinor));
    expect(v.plan.days).toHaveLength(b.totalDays);
    expect(v.plan.todayIndex).toBe(b.elapsedDays - 1);
    // Bugünden sonraki gerçekleşmiş işlem yok: bugüne kadar harcanan = ayın gerçekleşeni.
    expect(v.plan.actualToDateMinor).toBe(b.totals.actualMinor);
    expect(v.projectedLeftMinor).toBe(v.income.expectedMinor - b.totals.forecastMinor);
    expect(v.plannedLeftMinor).toBe(v.income.expectedMinor - b.totals.limitMinor);
    expect(v.next.month).toBe(shiftMonth(month, 1));
  });

  it("önceki ay örüntüsü modu: dağılım değişir, toplam korunur; bütçesiz hane", async () => {
    const even = (await getDailyPlan(ayse, cakir))!;
    await HouseholdModel.updateOne(
      { _id: cakir },
      { $set: { "settings.dailyPlanMode": "previous_month_pattern" } },
    );
    const pattern = (await getDailyPlan(ayse, cakir))!;
    await HouseholdModel.updateOne({ _id: cakir }, { $set: { "settings.dailyPlanMode": "even" } });
    expect(pattern.mode).toBe("previous_month_pattern");
    expect(pattern.plan.days.at(-1)!.cumPlannedMinor).toBe(even.plan.days.at(-1)!.cumPlannedMinor);
    expect(pattern.plan.days.map((d) => d.plannedMinor)).not.toEqual(
      even.plan.days.map((d) => d.plannedMinor),
    );

    const annemler = ids.household("Annemler");
    const a = (await getDailyPlan(fatma, annemler))!;
    expect(a.hasBudget).toBe(false);
    expect(await getDailyPlan(fatma, cakir)).toBeNull();
  });
});