import { describe, it, expect } from "vitest";
import {
  escapeHtml,
  truncateText,
  parseEventForDisplay,
  dungeonTemplate,
} from "../../src/dungeonTemplate.js";

describe("escapeHtml", () => {
  it("returns empty string for empty input", () => {
    expect(escapeHtml("")).toBe("");
  });

  it("returns empty string for null/undefined-like", () => {
    expect(escapeHtml(null)).toBe("");
    expect(escapeHtml(undefined)).toBe("");
  });

  it("escapes & < > \" '", () => {
    expect(escapeHtml("&")).toBe("&amp;");
    expect(escapeHtml("<")).toBe("&lt;");
    expect(escapeHtml(">")).toBe("&gt;");
    expect(escapeHtml('"')).toBe("&quot;");
    expect(escapeHtml("'")).toBe("&#039;");
    expect(escapeHtml('<script>&"\'</script>')).toBe(
      "&lt;script&gt;&amp;&quot;&#039;&lt;/script&gt;"
    );
  });

  it("leaves normal text unchanged", () => {
    expect(escapeHtml("Hello World")).toBe("Hello World");
  });
});

describe("truncateText", () => {
  it("returns empty for empty input", () => {
    expect(truncateText("", 1, 100)).toBe("");
  });

  it("returns text when within sentence and char limits", () => {
    const one = "One sentence.";
    expect(truncateText(one, 1, 100)).toBe(one);
  });

  it("truncates to maxSentences", () => {
    const three = "First. Second. Third.";
    expect(truncateText(three, 1, 500)).toBe("First.");
    expect(truncateText(three, 2, 500)).toContain("First.");
    expect(truncateText(three, 2, 500)).toContain("Second.");
  });

  it("truncates by maxChars and ends at sentence boundary when possible", () => {
    const long = "A short bit. Then a much longer sentence that goes past the limit we set.";
    const out = truncateText(long, 99, 30);
    expect(out.length).toBeLessThanOrEqual(33);
    expect(out === "A short bit." || out.endsWith("...")).toBe(true);
  });

  it("appends ... when no sentence boundary near end", () => {
    const noPeriod = "No period here and more text";
    expect(truncateText(noPeriod, 1, 15)).toMatch(/\.\.\.$/);
  });
});

describe("parseEventForDisplay", () => {
  it("returns object name and description when given object", () => {
    const event = { name: "Event A", description: "Something happened." };
    const got = parseEventForDisplay(event, 0);
    expect(got.name).toBe("Event A");
    expect(got.description).toContain("Something");
  });

  it('parses "Name: Description" string', () => {
    const got = parseEventForDisplay("Fire: The room catches fire.", 0);
    expect(got.name).toBe("Fire");
    expect(got.description).toContain("catches fire");
  });

  it("splits string without colon into first two words as name, rest as description", () => {
    const got = parseEventForDisplay("One Two Three Four", 0);
    expect(got.name).toBe("One Two");
    expect(got.description).toBe("Three Four");
  });

  it("uses fallback Event N and full string for short string", () => {
    const got = parseEventForDisplay("Hi", 2);
    expect(got.name).toBe("Event 3");
    expect(got.description).toBe("Hi");
  });

  it("handles non-string non-object with index", () => {
    const got = parseEventForDisplay(null, 1);
    expect(got.name).toBe("Event 2");
    expect(got.description).toBe("");
  });
});

describe("dungeonTemplate", () => {
  it("produces HTML with title and main sections for minimal data", () => {
    const data = {
      title: "Test Dungeon",
      flavor: "A dark place.",
      hooksRumors: ["Hook one.", "Hook two."],
      rooms: [{ name: "Room 1", description: "A room." }],
      encounters: [{ name: "Encounter 1", details: "Hall: Something happens." }],
      npcs: [{ name: "NPC 1", trait: "A guard." }],
      treasure: [{ name: "Gold", description: "Shiny." }],
      randomEvents: [{ name: "Event 1", description: "Something." }],
      plotResolutions: ["Resolution one."],
    };
    const html = dungeonTemplate(data);
    expect(html).toContain("Test Dungeon");
    expect(html).toContain("A dark place.");
    expect(html).toContain("Room 1");
    expect(html).toContain("Encounter 1");
    expect(html).toContain("NPC 1");
    expect(html).toContain("Gold");
    expect(html).toContain("Event 1");
    expect(html).toContain("Resolution one.");
    expect(html).toContain("<!DOCTYPE html>");
  });

  it("includes map page when data.map is data URL", () => {
    const data = {
      title: "With Map",
      flavor: "Flavor.",
      map: "data:image/png;base64,abc123",
      hooksRumors: ["H1"],
      rooms: [],
      encounters: [],
      npcs: [],
      treasure: [],
      randomEvents: [],
      plotResolutions: [],
    };
    const html = dungeonTemplate(data);
    expect(html).toContain("map-page");
    expect(html).toContain("data:image/png;base64,abc123");
  });

  it("omits flavor paragraph when flavor is empty", () => {
    const data = {
      title: "No Flavor",
      flavor: "",
      hooksRumors: ["H1"],
      rooms: [],
      encounters: [],
      npcs: [],
      treasure: [],
      randomEvents: [],
      plotResolutions: [],
    };
    const html = dungeonTemplate(data);
    expect(html).toContain("No Flavor");
    expect(html).not.toMatch(/<p class="flavor">/);
  });

  it("renders treasure as string Name — Desc", () => {
    const data = {
      title: "T",
      flavor: "F",
      hooksRumors: [],
      rooms: [],
      encounters: [],
      npcs: [],
      treasure: ["Gold — Shiny coins."],
      randomEvents: [],
      plotResolutions: [],
    };
    const html = dungeonTemplate(data);
    expect(html).toContain("Gold");
    expect(html).toContain("Shiny coins");
  });

  it("renders NPC as string Name: Trait", () => {
    const data = {
      title: "T",
      flavor: "F",
      hooksRumors: [],
      rooms: [],
      encounters: [],
      npcs: ["Guard: A stern guard."],
      treasure: [],
      randomEvents: [],
      plotResolutions: [],
    };
    const html = dungeonTemplate(data);
    expect(html).toContain("Guard");
    expect(html).toContain("stern guard");
  });

  it("strips location prefix from encounter details when it looks like a location name", () => {
    const data = {
      title: "T",
      flavor: "F",
      hooksRumors: [],
      rooms: [{ name: "Grand Hall", description: "Big." }],
      encounters: [
        { name: "E1", details: "Grand Hall: The fight happens here in the hall." },
      ],
      npcs: [],
      treasure: [],
      randomEvents: [],
      plotResolutions: [],
    };
    const html = dungeonTemplate(data);
    expect(html).toContain("The fight happens here");
  });

  it("renders encounter details without name when details start with encounter name", () => {
    const data = {
      title: "T",
      flavor: "F",
      hooksRumors: [],
      rooms: [],
      encounters: [
        { name: "Goblin Attack", details: "Goblin Attack: They strike." },
      ],
      npcs: [],
      treasure: [],
      randomEvents: [],
      plotResolutions: [],
    };
    const html = dungeonTemplate(data);
    expect(html).toContain("They strike");
  });
});