import { describe, expect, it } from "vitest";
import {
  BLACKJACK_XP_ENABLED,
  BLACKJACK_XP_CAP,
  computeBlackjackStatsDelta,
  readBlackjackStats,
  xpForProfit,
  type BlackjackSessionResult,
  type BlackjackStats,
} from "@/lib/minigames/blackjack/stats";

function result(overrides: Partial<BlackjackSessionResult> = {}): BlackjackSessionResult {
  return {
    userId: 1,
    roundsPlayed: 10,
    roundsWon: 4,
    blackjacksHit: 1,
    finalBankroll: 1250,
    ...overrides,
  };
}

function current(overrides: Partial<BlackjackStats> = {}): BlackjackStats {
  return {
    gamesPlayed: 0,
    roundsWon: 0,
    blackjacksHit: 0,
    bestScore: 0,
    xpEarned: 0,
    ...overrides,
  };
}

describe("xpForProfit", () => {
  it("awards the base XP for a breakeven or losing session", () => {
    expect(xpForProfit(1000)).toBe(5);
    expect(xpForProfit(500)).toBe(5);
  });

  it("awards no bracket bonus below a full 25% profit", () => {
    expect(xpForProfit(1100)).toBe(5);
    expect(xpForProfit(1249)).toBe(5);
  });

  it("awards 10 XP per full 25% profit bracket", () => {
    expect(xpForProfit(1250)).toBe(15);
    expect(xpForProfit(1500)).toBe(25);
    expect(xpForProfit(1750)).toBe(35);
    expect(xpForProfit(2000)).toBe(45);
  });

  it("caps the payout at the session cap", () => {
    expect(BLACKJACK_XP_CAP).toBe(50);
    expect(xpForProfit(2500)).toBe(BLACKJACK_XP_CAP);
    expect(xpForProfit(100000)).toBe(BLACKJACK_XP_CAP);
  });
});

describe("BLACKJACK_XP_ENABLED", () => {
  it("is disabled by default until the XP system is reworked", () => {
    expect(BLACKJACK_XP_ENABLED).toBe(false);
  });
});

describe("computeBlackjackStatsDelta", () => {
  it("increments gamesPlayed by exactly one", () => {
    const next = computeBlackjackStatsDelta(current({ gamesPlayed: 7 }), result());
    expect(next.gamesPlayed).toBe(8);
  });

  it("accumulates rounds won and blackjacks hit", () => {
    const next = computeBlackjackStatsDelta(
      current({ roundsWon: 10, blackjacksHit: 2 }),
      result({ roundsWon: 4, blackjacksHit: 1 }),
    );
    expect(next.roundsWon).toBe(14);
    expect(next.blackjacksHit).toBe(3);
  });

  it("keeps bestScore when the final bankroll is lower", () => {
    const next = computeBlackjackStatsDelta(
      current({ bestScore: 9000 }),
      result({ finalBankroll: 1250 }),
    );
    expect(next.bestScore).toBe(9000);
  });

  it("raises bestScore when the final bankroll is higher", () => {
    const next = computeBlackjackStatsDelta(
      current({ bestScore: 1000 }),
      result({ finalBankroll: 2400 }),
    );
    expect(next.bestScore).toBe(2400);
  });

  it("adds the profit XP to the existing xpEarned total", () => {
    const next = computeBlackjackStatsDelta(
      current({ xpEarned: 100 }),
      result({ finalBankroll: 1500 }),
    );
    expect(next.xpEarned).toBe(125);
  });

  it("does not mutate the current stats object", () => {
    const before = current({ gamesPlayed: 1, xpEarned: 125 });
    computeBlackjackStatsDelta(before, result());
    expect(before).toEqual(current({ gamesPlayed: 1, xpEarned: 125 }));
  });
});

describe("readBlackjackStats", () => {
  it("reads blackjack stats from a profile that also carries sibling games", () => {
    const profile = {
      progression: {
        minigames: {
          poker: { gamesPlayed: 12, xpEarned: 40 },
          blackjack: { gamesPlayed: 3, roundsWon: 5, blackjacksHit: 2, bestScore: 1500, xpEarned: 15 },
        },
      },
    };
    expect(readBlackjackStats(profile)).toEqual(
      current({ gamesPlayed: 3, roundsWon: 5, blackjacksHit: 2, bestScore: 1500, xpEarned: 15 }),
    );
  });

  it("returns all zeros when the blackjack group is missing", () => {
    expect(readBlackjackStats({ progression: { minigames: {} } })).toEqual(current());
  });

  it("returns all zeros for a nullish profile", () => {
    expect(readBlackjackStats(undefined)).toEqual(current());
  });
});