import { describe, expect, it } from "vitest";
import {
  PROJECT_FORMAT,
  PROJECT_SCHEMA_VERSION,
  ProjectFormatError,
  createProject,
  parseProject,
  readProject,
  serializeProject,
  validateProject,
} from "../../src/project/project-format";

function project(
  source = '<svg xmlns="http://www.w3.org/2000/svg">\r\n  <path d="M0 0"/>\r\n</svg>',
) {
  return createProject({
    appVersion: "0.1.0",
    document: { source },
    ui: {
      selectedNodeKey: "id:path",
      expandedNodeKeys: ["id:root"],
      activePanel: "path",
      zoom: 1.25,
      pan: { x: 12, y: -4 },
      showGrid: true,
      sourceSelection: { anchor: 1, head: 4 },
    },
    animations: [
      {
        id: "fade",
        name: "Fade",
        targetNodeKey: "id:path",
        property: "opacity",
        kind: "style",
        enabled: true,
        keyframes: [
          { offset: 0, value: "0" },
          { offset: 1, value: "1", easing: "linear" },
        ],
        timing: {
          durationMs: 750,
          delayMs: 0,
          iterations: 1,
          direction: "normal",
          fillMode: "both",
          easing: "ease-in-out",
        },
      },
    ],
    metadata: {
      title: "Exact source",
      originalFileName: "drawing.svg",
      createdAt: "2026-07-31T00:00:00.000Z",
      updatedAt: "2026-07-31T00:00:00.000Z",
    },
  });
}

describe("SVG Tools project format", () => {
  it("round-trips canonical source byte-for-byte, including temporarily invalid XML", () => {
    const source =
      '<svg xmlns="http://www.w3.org/2000/svg">\r\n  <g data-x="&amp;">\r\n';
    const original = project(source);
    const restored = parseProject(serializeProject(original));
    expect(restored.document.source).toBe(source);
    expect(restored).toEqual(original);
  });

  it("serializes deterministically with the versioned identity", () => {
    const value = project();
    const first = serializeProject(value);
    expect(serializeProject(value)).toBe(first);
    expect(first.endsWith("\n")).toBe(true);
    expect(JSON.parse(first)).toMatchObject({
      format: PROJECT_FORMAT,
      schemaVersion: PROJECT_SCHEMA_VERSION,
      appVersion: "0.1.0",
    });
  });

  it("accepts a UTF-8 BOM and rejects incompatible schemas", () => {
    const serialized = serializeProject(project());
    expect(parseProject(`\ufeff${serialized}`).document.source).toContain(
      "<svg",
    );
    const unsupported = JSON.parse(serialized) as Record<string, unknown>;
    unsupported.schemaVersion = 999;
    expect(() => parseProject(JSON.stringify(unsupported))).toThrowError(
      expect.objectContaining({ code: "UNSUPPORTED_SCHEMA_VERSION" }),
    );
  });

  it("rejects invalid projects instead of silently repairing them", () => {
    const invalid = JSON.parse(serializeProject(project())) as {
      animations: Array<{ keyframes: Array<{ offset: number }> }>;
      ui: { expandedNodeKeys: string[] };
    };
    invalid.animations[0]!.keyframes[0]!.offset = 1;
    invalid.animations[0]!.keyframes[1]!.offset = 0;
    expect(() => parseProject(JSON.stringify(invalid))).toThrowError(
      ProjectFormatError,
    );

    invalid.animations[0]!.keyframes[0]!.offset = 0;
    invalid.animations[0]!.keyframes[1]!.offset = 1;
    invalid.ui.expandedNodeKeys = ["same", "same"];
    expect(() => parseProject(JSON.stringify(invalid))).toThrow(
      /Duplicate values/u,
    );
    expect(() => parseProject("not json")).toThrowError(
      expect.objectContaining({ code: "INVALID_JSON" }),
    );
  });

  it("applies the animation CSS policy to imported project definitions", () => {
    type ImportedProject = {
      animations: Array<{
        property: string;
        keyframes: Array<{ offset: number; value: string; easing?: string }>;
        timing: {
          durationMs: number;
          delayMs: number;
          iterations: number | "infinite";
          easing: string;
        };
      }>;
    };
    const original = JSON.parse(serializeProject(project())) as ImportedProject;
    const expectInvalid = (mutate: (input: ImportedProject) => void) => {
      const input = structuredClone(original);
      mutate(input);
      expect(() => validateProject(input)).toThrowError(
        expect.objectContaining({ code: "INVALID_PROJECT" }),
      );
    };

    expectInvalid((input) => {
      input.animations[0]!.property = "opacity; stroke: red";
    });
    expectInvalid((input) => {
      input.animations[0]!.keyframes[0]!.value =
        "0</style><script>alert(1)</script>";
    });
    expectInvalid((input) => {
      input.animations[0]!.timing.easing = "linear; stroke: red";
    });
    expectInvalid((input) => {
      input.animations[0]!.keyframes[0]!.offset = Number.NaN;
    });
    expectInvalid((input) => {
      input.animations[0]!.timing.durationMs = Number.POSITIVE_INFINITY;
    });
    expectInvalid((input) => {
      input.animations[0]!.timing.iterations = Number.POSITIVE_INFINITY;
    });
  });

  it("rejects invalid UTF-8 project bytes", async () => {
    await expect(
      readProject(new Blob([Uint8Array.of(0xc3, 0x28)])),
    ).rejects.toMatchObject({
      code: "INVALID_UTF8",
    });
  });
});