/* eslint-disable max-lines-per-function -- Test suites naturally have many cases */
/* eslint-disable @typescript-eslint/consistent-type-assertions -- Tests build minimal state objects */
import { describe, expect, it } from "vitest";
import { calculateOfflineEarnings } from "../../src/services/offlineProgress.js";
import type { GameState } from "@elysium/types";

const makeState = (overrides: Partial<GameState> = {}): GameState =>
  ({
    lastTickAt: 0,
    adventurers: [],
    upgrades: [],
    equipment: [],
    prestige: {
      count: 0,
      runestones: 0,
      productionMultiplier: 1,
      purchasedUpgradeIds: [],
      runestonesIncomeMultiplier: 1,
      runestonesEssenceMultiplier: 1,
    },
    ...overrides,
  } as GameState);

describe("calculateOfflineEarnings", () => {
  it("returns zero earnings when no adventurers", () => {
    const state = makeState({ lastTickAt: 0 });
    const result = calculateOfflineEarnings(state, 60_000);
    expect(result.offlineGold).toBe(0);
    expect(result.offlineEssence).toBe(0);
    expect(result.offlineSeconds).toBe(60);
  });

  it("returns zero when all adventurers have count 0", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "a", unlocked: true, count: 0, goldPerSecond: 10, essencePerSecond: 0 }] as GameState["adventurers"],
    });
    const result = calculateOfflineEarnings(state, 60_000);
    expect(result.offlineGold).toBe(0);
  });

  it("returns zero when adventurer is not unlocked", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "a", unlocked: false, count: 5, goldPerSecond: 10, essencePerSecond: 0 }] as GameState["adventurers"],
    });
    const result = calculateOfflineEarnings(state, 60_000);
    expect(result.offlineGold).toBe(0);
  });

  it("calculates basic gold earnings correctly", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "a", unlocked: true, count: 2, goldPerSecond: 5, essencePerSecond: 0 }] as GameState["adventurers"],
    });
    const result = calculateOfflineEarnings(state, 10_000);
    // 2 adventurers × 5 gps × 10 seconds = 100 gold
    expect(result.offlineGold).toBe(100);
    expect(result.offlineSeconds).toBe(10);
  });

  it("calculates basic essence earnings correctly", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "a", unlocked: true, count: 1, goldPerSecond: 0, essencePerSecond: 3 }] as GameState["adventurers"],
    });
    const result = calculateOfflineEarnings(state, 10_000);
    expect(result.offlineEssence).toBe(30);
  });

  it("caps earnings at 8 hours regardless of elapsed time", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "a", unlocked: true, count: 1, goldPerSecond: 1, essencePerSecond: 0 }] as GameState["adventurers"],
    });
    const twelveHoursMs = 12 * 60 * 60 * 1000;
    const result = calculateOfflineEarnings(state, twelveHoursMs);
    const maxSeconds = 8 * 60 * 60;
    expect(result.offlineGold).toBe(maxSeconds);
    expect(result.offlineSeconds).toBe(maxSeconds);
  });

  it("applies global upgrade multiplier", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "a", unlocked: true, count: 1, goldPerSecond: 10, essencePerSecond: 0 }] as GameState["adventurers"],
      upgrades: [{ id: "u1", purchased: true, target: "global", multiplier: 2 }] as GameState["upgrades"],
    });
    const result = calculateOfflineEarnings(state, 1_000);
    expect(result.offlineGold).toBe(20);
  });

  it("applies adventurer-specific upgrade multiplier", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "peasant", unlocked: true, count: 1, goldPerSecond: 10, essencePerSecond: 0 }] as GameState["adventurers"],
      upgrades: [{ id: "u1", purchased: true, target: "adventurer", adventurerId: "peasant", multiplier: 3 }] as GameState["upgrades"],
    });
    const result = calculateOfflineEarnings(state, 1_000);
    expect(result.offlineGold).toBe(30);
  });

  it("does not apply upgrade for different adventurer", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "peasant", unlocked: true, count: 1, goldPerSecond: 10, essencePerSecond: 0 }] as GameState["adventurers"],
      upgrades: [{ id: "u1", purchased: true, target: "adventurer", adventurerId: "knight", multiplier: 3 }] as GameState["upgrades"],
    });
    const result = calculateOfflineEarnings(state, 1_000);
    expect(result.offlineGold).toBe(10);
  });

  it("applies equipment gold multiplier for equipped items only", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "a", unlocked: true, count: 1, goldPerSecond: 10, essencePerSecond: 0 }] as GameState["adventurers"],
      equipment: [
        { id: "e1", equipped: true, bonus: { goldMultiplier: 2 } },
        { id: "e2", equipped: false, bonus: { goldMultiplier: 5 } },
      ] as GameState["equipment"],
    });
    const result = calculateOfflineEarnings(state, 1_000);
    // Only e1 applies: 10 × 2 × 1s = 20
    expect(result.offlineGold).toBe(20);
  });

  it("applies runestone income multiplier to gold", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "a", unlocked: true, count: 1, goldPerSecond: 10, essencePerSecond: 0 }] as GameState["adventurers"],
      prestige: {
        count: 0, runestones: 0, productionMultiplier: 1, purchasedUpgradeIds: [],
        runestonesIncomeMultiplier: 2,
        runestonesEssenceMultiplier: 1,
      } as GameState["prestige"],
    });
    const result = calculateOfflineEarnings(state, 1_000);
    expect(result.offlineGold).toBe(20);
  });

  it("applies runestone essence multiplier to essence", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "a", unlocked: true, count: 1, goldPerSecond: 0, essencePerSecond: 5 }] as GameState["adventurers"],
      prestige: {
        count: 0, runestones: 0, productionMultiplier: 1, purchasedUpgradeIds: [],
        runestonesIncomeMultiplier: 1,
        runestonesEssenceMultiplier: 3,
      } as GameState["prestige"],
    });
    const result = calculateOfflineEarnings(state, 1_000);
    expect(result.offlineEssence).toBe(15);
  });

  it("defaults to 1 when runestonesIncomeMultiplier is undefined", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "a", unlocked: true, count: 1, goldPerSecond: 10, essencePerSecond: 2 }] as GameState["adventurers"],
      // Prestige without runestone multiplier fields — hits the ?? 1 fallback
      prestige: { count: 0, runestones: 0, productionMultiplier: 1, purchasedUpgradeIds: [] } as GameState["prestige"],
    });
    const result = calculateOfflineEarnings(state, 1_000);
    expect(result.offlineGold).toBe(10);
    expect(result.offlineEssence).toBe(2);
  });

  it("defaults to 1 when equipment is undefined", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "a", unlocked: true, count: 1, goldPerSecond: 10, essencePerSecond: 0 }] as GameState["adventurers"],
      equipment: undefined,
    });
    const result = calculateOfflineEarnings(state, 1_000);
    expect(result.offlineGold).toBe(10);
  });

  it("defaults goldMultiplier to 1 when equipment item has no goldMultiplier", () => {
    const state = makeState({
      lastTickAt: 0,
      adventurers: [{ id: "a", unlocked: true, count: 1, goldPerSecond: 10, essencePerSecond: 0 }] as GameState["adventurers"],
      equipment: [
        { id: "e1", equipped: true, bonus: {} }, // no goldMultiplier — hits ?? 1
      ] as GameState["equipment"],
    });
    const result = calculateOfflineEarnings(state, 1_000);
    // goldMultiplier defaults to 1, so no boost
    expect(result.offlineGold).toBe(10);
  });
});