import { describe, expect, it } from "vitest";
import { ArcadeImportError, parseConnectionsImport, parseConnectionsImportBatch } from "@/lib/arcade/connectionsImport";

function validPack() {
  return {
    schemaVersion: 1,
    type: "connections",
    name: "Medication Connections",
    description: "Four medication groups",
    settings: { groupCount: 4, itemsPerGroup: 4, allowedMistakes: 4 },
    content: Array.from({ length: 4 }, (_, groupIndex) => ({
      category: `Category ${groupIndex + 1}`,
      items: Array.from({ length: 4 }, (_, itemIndex) => `Item ${groupIndex + 1}-${itemIndex + 1}`),
      explanation: `Explanation ${groupIndex + 1}`,
    })),
  };
}

describe("Connections imports", () => {
  it("normalizes a valid board and creates stable ids", () => {
    const result = parseConnectionsImport(JSON.stringify(validPack()));
    expect(result.preview.itemCount).toBe(16);
    expect(result.preview.itemCount).toBe(16);
    expect(result.preview.normalized.content[0].id).toBe("group-1");
    expect(result.preview.normalized.content[0].items[0].id).toBe("group-1-item-1");
  });

  it("rejects fences and surrounding prose", () => {
    expect(() => parseConnectionsImport(`\`\`\`json\n${JSON.stringify(validPack())}\n\`\`\``)).toThrow(ArcadeImportError);
    expect(() => parseConnectionsImport(`Here is the pack: ${JSON.stringify(validPack())}`)).toThrow(ArcadeImportError);
  });

  it("rejects duplicate tiles case-insensitively", () => {
    const pack = validPack();
    pack.content[1].items[0] = " item 1-1 ";
    expect(() => parseConnectionsImport(JSON.stringify(pack))).toThrow("Every tile must be unique");
  });

  it("rejects unknown keys", () => {
    const pack = { ...validPack(), extra: true };
    expect(() => parseConnectionsImport(JSON.stringify(pack))).toThrow("does not match schema version 1");
  });

  it("reports long-tile warnings without changing the content", () => {
    const pack = validPack();
    pack.content[0].items[0] = "This intentionally long tile contains too many words";
    const result = parseConnectionsImport(JSON.stringify(pack));
    expect(result.report.warnings.length).toBeGreaterThan(0);
    expect(result.preview.normalized.content[0].items[0].text).toBe(pack.content[0].items[0]);
  });

  it("does not treat a shared generic word as a similar category", () => {
    const pack = validPack();
    pack.content[0].category = "ACE Inhibitors";
    pack.content[1].category = "Proton Pump Inhibitors";
    const result = parseConnectionsImport(JSON.stringify(pack));
    expect(result.report.warnings).not.toContain(
      "Categories “ACE Inhibitors” and “Proton Pump Inhibitors” may be too similar."
    );
  });

  it("previews multiple packs from one JSON array", () => {
    const first = validPack();
    const second = { ...validPack(), name: "Second board" };
    const result = parseConnectionsImportBatch(JSON.stringify([first, second]));
    expect(result.count).toBe(2);
    expect(result.packs.map((pack) => pack.name)).toEqual(["Medication Connections", "Second board"]);
  });

  it("limits batch imports to ten packs", () => {
    const batch = Array.from({ length: 11 }, () => validPack());
    expect(() => parseConnectionsImportBatch(JSON.stringify(batch))).toThrow("between 1 and 10");
  });
});