import { mkdir, mkdtemp, rm, writeFile } from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { describe, expect, it } from "vitest";
import { inspectProject, listContent, openProject, readYaml, resolveWithin, stats, writeYaml } from "../src/project.js";
import { newProject } from "../src/template.js";

async function tmpDir(): Promise<string> {
  return mkdtemp(join(tmpdir(), "editor-project-"));
}

describe("openProject", () => {
  it("accepts a folder with content/ and returns project info", async () => {
    const dir = await tmpDir();
    try {
      await mkdir(join(dir, "content"));
      const project = await openProject(dir);
      expect(project.root).toBe(dir);
      expect(project.name).toBe(dir.split("/").pop());
      expect(project.hasContent).toBe(true);
      expect(project.hasMods).toBe(false);
      expect(project.projectYaml).toBeNull();
    } finally {
      await rm(dir, { recursive: true, force: true });
    }
  });

  it("rejects a folder without content/", async () => {
    const dir = await tmpDir();
    try {
      await expect(openProject(dir)).rejects.toThrow(/missing content/);
    } finally {
      await rm(dir, { recursive: true, force: true });
    }
  });

  it("uses project.yaml name when present", async () => {
    const dir = await tmpDir();
    try {
      await mkdir(join(dir, "content"));
      await writeFile(join(dir, "project.yaml"), "name: My Game\n", "utf8");
      const project = await openProject(dir);
      expect(project.name).toBe("My Game");
      expect(project.projectYaml?.name).toBe("My Game");
    } finally {
      await rm(dir, { recursive: true, force: true });
    }
  });

  it("tolerates a malformed project.yaml", async () => {
    const dir = await tmpDir();
    try {
      await mkdir(join(dir, "content"));
      await writeFile(join(dir, "project.yaml"), "name: [broken\n", "utf8");
      const project = await openProject(dir);
      expect(project.name).toBe(dir.split("/").pop());
      expect(project.projectYaml).toBeNull();
      expect(project.projectYamlError).toBeDefined();
    } finally {
      await rm(dir, { recursive: true, force: true });
    }
  });
});

describe("listContent and stats", () => {
  it("lists kinds with counts and relative file paths on a generated project", async () => {
    const dir = await tmpDir();
    try {
      const project = await newProject("Test Farm", dir);
      const listing = await listContent(project.root);
      const byKind = new Map(listing.kinds.map((k) => [k.kind, k]));
      expect(byKind.get("map")?.count).toBe(1);
      expect(byKind.get("item")?.count).toBe(3);
      expect(byKind.get("crop")?.count).toBe(1);
      expect(byKind.get("time")?.count).toBe(1);
      expect(byKind.get("weather")?.count).toBe(1);
      expect(byKind.get("interact")?.count).toBe(1);
      expect(byKind.get("scene")?.count).toBe(1);
      const hoe = byKind.get("item")?.files.find((f) => f.name === "hoe.yaml");
      expect(hoe?.path).toBe("content/items/hoe.yaml");
      const time = byKind.get("time")?.files[0];
      expect(time?.path).toBe("content/time.yaml");
      expect(listing.mods).toEqual([]);
    } finally {
      await rm(dir, { recursive: true, force: true });
    }
  });

  it("returns stats with per-kind counts", async () => {
    const dir = await tmpDir();
    try {
      const project = await newProject("Stats Farm", dir);
      const result = await stats(project.root);
      expect(result.kinds.map).toBe(1);
      expect(result.kinds.item).toBe(3);
      expect(result.total).toBe(9);
      expect(result.mods).toBe(0);
      expect(result.assets).toBe(0);
    } finally {
      await rm(dir, { recursive: true, force: true });
    }
  });

  it("counts mods when a mods/ dir has entries", async () => {
    const dir = await tmpDir();
    try {
      await mkdir(join(dir, "content"), { recursive: true });
      await mkdir(join(dir, "mods", "my-mod"), { recursive: true });
      await writeFile(join(dir, "mods", "my-mod", "index.mjs"), "export const hooks = {}\n", "utf8");
      const listing = await listContent(dir);
      expect(listing.mods).toEqual(["my-mod"]);
      expect((await stats(dir)).mods).toBe(1);
    } finally {
      await rm(dir, { recursive: true, force: true });
    }
  });
});

describe("resolveWithin", () => {
  it("accepts paths inside the root", () => {
    expect(resolveWithin("/a/b", "content/maps/farm.yaml")).toBe("/a/b/content/maps/farm.yaml");
    expect(resolveWithin("/a/b", ".")).toBe("/a/b");
  });

  it("rejects parent traversal and absolute escapes", () => {
    expect(() => resolveWithin("/a/b", "../secret.yaml")).toThrow(/escapes project root/);
    expect(() => resolveWithin("/a/b", "content/../../x.yaml")).toThrow(/escapes project root/);
    expect(() => resolveWithin("/a/b", "/etc/passwd")).toThrow(/escapes project root/);
  });
});

describe("readYaml and writeYaml", () => {
  it("roundtrips yaml content and creates nested directories", async () => {
    const dir = await tmpDir();
    try {
      await mkdir(join(dir, "content"), { recursive: true });
      await writeYaml(dir, "content/items/hoe.yaml", "id: hoe\n");
      expect(await readYaml(dir, "content/items/hoe.yaml")).toBe("id: hoe\n");
    } finally {
      await rm(dir, { recursive: true, force: true });
    }
  });

  it("rejects non-yaml paths", async () => {
    const dir = await tmpDir();
    try {
      await expect(writeYaml(dir, "content/notes.txt", "x")).rejects.toThrow(/not a yaml path/);
    } finally {
      await rm(dir, { recursive: true, force: true });
    }
  });

  it("rejects traversal in read and write", async () => {
    const dir = await tmpDir();
    try {
      await expect(writeYaml(dir, "../evil.yaml", "x")).rejects.toThrow(/escapes project root/);
      await expect(readYaml(dir, "content/../../evil.yaml")).rejects.toThrow(/escapes project root/);
    } finally {
      await rm(dir, { recursive: true, force: true });
    }
  });
});

describe("inspectProject", () => {
  it("inspects a folder without requiring content/", async () => {
    const dir = await tmpDir();
    try {
      const project = await inspectProject(dir);
      expect(project.hasContent).toBe(false);
      expect(project.hasMods).toBe(false);
    } finally {
      await rm(dir, { recursive: true, force: true });
    }
  });
});