import { readFileSync, existsSync } from "node:fs";
import { resolve } from "node:path";
import { describe, it, expect } from "vitest";

const PLUGIN_ROOT = resolve(__dirname, "..");

describe("plugin.json", () => {
  const pluginPath = resolve(PLUGIN_ROOT, ".claude-plugin/plugin.json");

  it("exists", () => {
    expect(existsSync(pluginPath)).toBe(true);
  });

  it("is valid JSON with required fields", () => {
    const raw = readFileSync(pluginPath, "utf-8");
    const manifest = JSON.parse(raw);

    expect(manifest.name).toBe("fathom");
    expect(manifest.description).toBeTypeOf("string");
    expect(manifest.description.length).toBeGreaterThan(0);
    expect(manifest.version).toMatch(/^\d+\.\d+\.\d+$/);
    expect(manifest.author?.name).toBeTypeOf("string");
    expect(manifest.license).toBeTypeOf("string");
  });
});

describe(".mcp.json", () => {
  const mcpPath = resolve(PLUGIN_ROOT, ".mcp.json");

  it("exists", () => {
    expect(existsSync(mcpPath)).toBe(true);
  });

  it("is valid JSON with fathom MCP server config", () => {
    const raw = readFileSync(mcpPath, "utf-8");
    const config = JSON.parse(raw);

    expect(config.mcpServers.fathom.command).toBe("npx");
    expect(config.mcpServers.fathom.args).toBeInstanceOf(Array);
    expect(config.mcpServers.fathom.args).toContain("fathom-token-mcp@latest");
    expect(config.mcpServers.fathom.args).toContain("--project-dir");
  });
});

describe("directory structure", () => {
  it("skills directory exists", () => {
    expect(existsSync(resolve(PLUGIN_ROOT, "skills"))).toBe(true);
  });
});