import { describe, expect, it } from "vitest";
import {
  computePokerStatsDelta,
  readPokerStats,
  xpForPlacement,
  type PokerPlacementResult,
  type PokerStats,
} from "@/lib/minigames/poker/stats";

function result(overrides: Partial<PokerPlacementResult> = {}): PokerPlacementResult {
  return { userId: 1, placement: 1, finalChips: 5000, handsWon: 3, ...overrides };
}

function current(overrides: Partial<PokerStats> = {}): PokerStats {
  return {
    gamesPlayed: 0,
    wins: 0,
    secondPlaces: 0,
    thirdPlaces: 0,
    fourthPlaces: 0,
    handsWon: 0,
    bestScore: 0,
    xpEarned: 0,
    ...overrides,
  };
}

describe("xpForPlacement", () => {
  it("scales 1st place at 40x the player count", () => {
    expect(xpForPlacement(1, 2)).toBe(80);
    expect(xpForPlacement(1, 3)).toBe(120);
    expect(xpForPlacement(1, 4)).toBe(160);
  });

  it("scales 2nd place at 20x the player count", () => {
    expect(xpForPlacement(2, 2)).toBe(40);
    expect(xpForPlacement(2, 3)).toBe(60);
    expect(xpForPlacement(2, 4)).toBe(80);
  });

  it("scales 3rd place at 10x the player count", () => {
    expect(xpForPlacement(3, 2)).toBe(20);
    expect(xpForPlacement(3, 3)).toBe(30);
    expect(xpForPlacement(3, 4)).toBe(40);
  });

  it("scales 4th place at 5x the player count", () => {
    expect(xpForPlacement(4, 2)).toBe(10);
    expect(xpForPlacement(4, 3)).toBe(15);
    expect(xpForPlacement(4, 4)).toBe(20);
  });
});

describe("computePokerStatsDelta", () => {
  it("increments gamesPlayed by exactly one", () => {
    const next = computePokerStatsDelta(current({ gamesPlayed: 7 }), result(), 4);
    expect(next.gamesPlayed).toBe(8);
  });

  it("increments the wins counter for 1st place only", () => {
    const next = computePokerStatsDelta(current({ wins: 2 }), result({ placement: 1 }), 4);
    expect(next.wins).toBe(3);
    expect(next.secondPlaces).toBe(0);
    expect(next.thirdPlaces).toBe(0);
    expect(next.fourthPlaces).toBe(0);
  });

  it("increments the secondPlaces counter for 2nd place only", () => {
    const next = computePokerStatsDelta(
      current({ secondPlaces: 1 }),
      result({ placement: 2 }),
      4,
    );
    expect(next.secondPlaces).toBe(2);
    expect(next.wins).toBe(0);
    expect(next.thirdPlaces).toBe(0);
    expect(next.fourthPlaces).toBe(0);
  });

  it("increments the thirdPlaces counter for 3rd place only", () => {
    const next = computePokerStatsDelta(
      current({ thirdPlaces: 4 }),
      result({ placement: 3 }),
      4,
    );
    expect(next.thirdPlaces).toBe(5);
    expect(next.wins).toBe(0);
    expect(next.secondPlaces).toBe(0);
    expect(next.fourthPlaces).toBe(0);
  });

  it("increments the fourthPlaces counter for 4th place only", () => {
    const next = computePokerStatsDelta(
      current({ fourthPlaces: 1 }),
      result({ placement: 4 }),
      4,
    );
    expect(next.fourthPlaces).toBe(2);
    expect(next.wins).toBe(0);
    expect(next.secondPlaces).toBe(0);
    expect(next.thirdPlaces).toBe(0);
  });

  it("accumulates handsWon on top of the existing total", () => {
    const next = computePokerStatsDelta(
      current({ handsWon: 10 }),
      result({ handsWon: 4 }),
      4,
    );
    expect(next.handsWon).toBe(14);
  });

  it("keeps bestScore when the final chip total is lower", () => {
    const next = computePokerStatsDelta(
      current({ bestScore: 9000 }),
      result({ finalChips: 5000 }),
      4,
    );
    expect(next.bestScore).toBe(9000);
  });

  it("raises bestScore when the final chip total is higher", () => {
    const next = computePokerStatsDelta(
      current({ bestScore: 3000 }),
      result({ finalChips: 7500 }),
      4,
    );
    expect(next.bestScore).toBe(7500);
  });

  it("adds the placement XP to the existing xpEarned total", () => {
    const next = computePokerStatsDelta(
      current({ xpEarned: 100 }),
      result({ placement: 2 }),
      3,
    );
    expect(next.xpEarned).toBe(160);
  });

  it("does not mutate the current stats object", () => {
    const before = current({ gamesPlayed: 1, wins: 1, xpEarned: 160 });
    computePokerStatsDelta(before, result(), 4);
    expect(before).toEqual(current({ gamesPlayed: 1, wins: 1, xpEarned: 160 }));
  });
});

describe("readPokerStats", () => {
  it("reads poker stats from a profile that also carries sibling game stats", () => {
    const profile = {
      progression: {
        minigames: {
          flappyBird: { gamesPlayed: 12, xpEarned: 40 },
          poker: { gamesPlayed: 3, wins: 1, xpEarned: 200 },
        },
      },
    };
    expect(readPokerStats(profile)).toEqual(
      current({ gamesPlayed: 3, wins: 1, xpEarned: 200 }),
    );
  });

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

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