import { mkdir, writeFile } from "node:fs/promises";
import { isAbsolute, join, relative, sep } from "node:path";
import { expect, it } from "vitest";
import { LocalWebScriptArtifacts } from "../../../src/browser/assets/LocalWebScriptArtifacts.js";
import { projectAnalysisError } from "../../../src/domain/analysisErrorProjection.js";
import { createTestTempDirectory } from "../../fixtures/temporaryDirectory.js";
import { webModuleArtifactsFixture } from "../../fixtures/webModuleTrace.js";

const materialize = async () => {
  const root = join(
    await createTestTempDirectory("rea-script-manifest-path-"),
    "export with spaces",
  );
  const artifact = webModuleArtifactsFixture();
  await mkdir(join(root, "files", "modules"), { recursive: true });
  await mkdir(join(root, "nested"));
  const sourcePath = join(root, "files", "modules", "main.js");
  const manifestPath = join(root, "manifest.json");
  await writeFile(sourcePath, artifact.source);
  await writeFile(manifestPath, JSON.stringify(artifact.manifest));
  return { root, artifact, sourcePath, manifestPath };
};

it("reads equivalent local manifest spellings without changing reported identity", async () => {
  const fixture = await materialize();
  const paths = new Set([
    fixture.manifestPath,
    fixture.manifestPath.replaceAll("\\", "/"),
    `${fixture.root}${sep}nested${sep}..${sep}manifest.json`,
  ]);
  const fromWorkingDirectory = relative(process.cwd(), fixture.manifestPath);
  // A target on another Windows drive has no relative path from this cwd.
  if (!isAbsolute(fromWorkingDirectory))
    paths.add(`.${sep}${fromWorkingDirectory}`);
  for (const operation of [
    "trace_web_module_imports",
    "trace_web_source_location",
  ] as const) {
    for (const manifestPath of paths) {
      const response = await new LocalWebScriptArtifacts(operation).load({
        manifest_path: manifestPath,
        script_index: 0,
      });
      if (!response.ok) throw response.error;
      expect(response.value.source).toBe(fixture.artifact.source);
      expect(response.value.sourceFile).toEqual({
        ...fixture.artifact.sourceFile,
        path: fixture.sourcePath,
      });
      expect(response.value.manifestFile.path).toBe(manifestPath);
      expect(response.value.manifest.output_directory).toBe(
        fixture.artifact.manifest.output_directory,
      );
      expect(response.value.manifest.scripts[0]?.url).toBe(
        fixture.artifact.manifest.scripts[0]?.url,
      );
    }
  }
});

it("still rejects changed source bytes after normalizing the selected manifest path", async () => {
  const fixture = await materialize();
  await writeFile(fixture.sourcePath, "tampered source");
  const response = await new LocalWebScriptArtifacts(
    "trace_web_module_imports",
  ).load({
    manifest_path: `${fixture.root}/nested/../manifest.json`.replaceAll(
      "\\",
      "/",
    ),
    script_index: 0,
  });
  if (response.ok) throw new Error("Expected source integrity mismatch");
  expect(projectAnalysisError(response.error).code).toBe(
    "artifact_integrity_mismatch",
  );
});

const literalManifest = async () => {
  const fixture = await materialize();
  const selected = fixture.artifact.manifest.scripts[0];
  if (selected?.content.state !== "exported")
    throw new Error("Expected exported source");
  selected.content.relative_path = "..\\sibling.js";
  await writeFile(join(fixture.root, "sibling.js"), fixture.artifact.source);
  if (process.platform !== "win32")
    await writeFile(
      join(fixture.root, "files", selected.content.relative_path),
      fixture.artifact.source,
    );
  await writeFile(
    fixture.manifestPath,
    JSON.stringify(fixture.artifact.manifest),
  );
  return fixture;
};

it.each(["trace_web_module_imports", "trace_web_source_location"] as const)(
  "refuses Windows backslash source interpretation for %s",
  async (operation) => {
    const fixture = await literalManifest();
    const originalPlatform = Object.getOwnPropertyDescriptor(
      process,
      "platform",
    );
    const artifacts = new LocalWebScriptArtifacts(operation);
    let response;
    try {
      // Exercise the Windows admission branch; this is not native Windows IO.
      Object.defineProperty(process, "platform", { value: "win32" });
      response = await artifacts.load({
        manifest_path: fixture.manifestPath,
        script_index: 0,
      });
    } finally {
      if (originalPlatform !== undefined)
        Object.defineProperty(process, "platform", originalPlatform);
      await artifacts.close();
    }
    if (response.ok) throw new Error("Expected Windows source path refusal");
    expect(projectAnalysisError(response.error)).toMatchObject({
      code: "invalid_request",
      details: {
        issues: [
          {
            path: ["script_index"],
            reason: "invalid_value",
            message: expect.stringContaining(
              "Windows source path cannot contain backslashes",
            ),
          },
        ],
      },
    });
  },
);

it.skipIf(process.platform === "win32")(
  "reads the same saved POSIX literal name without selecting its sibling",
  async () => {
    const fixture = await literalManifest();
    await writeFile(join(fixture.root, "sibling.js"), "wrong sibling source");
    const artifacts = new LocalWebScriptArtifacts("trace_web_module_imports");
    try {
      const result = await artifacts.load({
        manifest_path: fixture.manifestPath,
        script_index: 0,
      });
      if (!result.ok) throw result.error;
      expect(result.value.source).toBe(fixture.artifact.source);
      expect(result.value.sourceFile.path).toBe(
        join(fixture.root, "files", "..\\sibling.js"),
      );
    } finally {
      await artifacts.close();
    }
  },
);