import { content } from "@deadhead/content";
import { describe, expect, it } from "vitest";
import {
  createDispatchRecord,
  deliveryXp,
  deliveryXpFor,
  generateTutorialBoard,
  pilotLevel,
  routeDistance,
  skillPointsAvailable,
  type Contract,
} from "../src/index";

const { config } = content;
const loc = (id: string) => content.location(id)!;
const now = Date.parse("2100-01-01T00:30:00Z");
const pilot = {
  id: "avatar",
  isAvatar: true,
  assignedShipId: null,
  inFlight: false,
  skills: {},
  restEndsAt: null,
};
const loaner = { id: "loaner", modelId: "company-courier", locationId: "earth", inFlight: false };

/** The XP a contract would pay on a tutorial run. */
function tutorialXp(contract: Contract): number {
  const record = createDispatchRecord(
    {
      id: "t",
      ship: { ...loaner, locationId: contract.originId },
      pilot,
      contract,
      tutorial: true,
      now,
      worldSeed: 1,
    },
    content,
  );
  return deliveryXpFor(record, contract.tier, content);
}

describe("tutorial XP (Step 17.2, decision 0.5.107)", () => {
  it("grants exactly the multiplier times a normal run's XP for the same route and cargo", () => {
    const [contract] = generateTutorialBoard(
      { loanerLocationId: "earth", runsCompleted: 0, periodIndex: 0 },
      content,
    );
    const normal = deliveryXp(routeDistance(loc("earth"), loc("moon")), contract!.tier, config);
    expect(tutorialXp(contract!)).toBe(normal * config.tutorialXpMultiplier);
    expect(config.tutorialXpMultiplier).toBeGreaterThanOrEqual(2);
  });

  it("brings the avatar to level 1 with a skill point after five runs of the lowest-XP jobs", () => {
    // Every board period gives a different board; take the worst case of many.
    for (let periodIndex = 0; periodIndex < 50; periodIndex++) {
      let xp = 0;
      let at: "earth" | "moon" = "earth";
      for (let run = 0; run < config.tutorialRunsBeforeDeal; run++) {
        const board = generateTutorialBoard(
          { loanerLocationId: at, runsCompleted: run, periodIndex: periodIndex + run },
          content,
        );
        // Run 2 offers the scripted "Unmarked crates" job; the cheapest choice is still taken.
        xp += Math.min(...board.map(tutorialXp));
        at = at === "earth" ? "moon" : "earth";
      }
      const level = pilotLevel(xp, config);
      expect(level, `period ${periodIndex}: ${xp} XP`).toBeGreaterThanOrEqual(1);
      expect(skillPointsAvailable(level, 0, config)).toBeGreaterThanOrEqual(1);
    }
  });
});