import { afterEach, beforeEach, describe, expect, test } from "bun:test";
import { mkdirSync, rmSync, writeFileSync } from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";

// ---- @ Alias Resolution Tests ----

let testDir: string;
let storePath: string;
let cliPath: string;

beforeEach(() => {
  // Create unique temp directory for each test
  testDir = join(
    tmpdir(),
    `ocas-cli-test-${Date.now()}-${Math.random().toString(36).slice(2)}`,
  );
  storePath = join(testDir, "store");
  cliPath = join(import.meta.dir, "../src/index.ts");

  mkdirSync(testDir, { recursive: true });
  mkdirSync(storePath, { recursive: true });
});

afterEach(() => {
  // Clean up test directory
  try {
    rmSync(testDir, { recursive: true, force: true });
  } catch {
    // Ignore cleanup errors
  }
});

/**
 * Run CLI command and return stdout, stderr, and exit code
 */
async function runCliAlias(...args: string[]): Promise<{
  stdout: string;
  stderr: string;
  exitCode: number;
}> {
  const proc = Bun.spawn(
    ["bun", "run", cliPath, "--store", storePath, ...args],
    {
      stdout: "pipe",
      stderr: "pipe",
    },
  );

  const [stdout, stderr] = await Promise.all([
    new Response(proc.stdout).text(),
    new Response(proc.stderr).text(),
  ]);

  await proc.exited;

  return {
    stdout: stdout.trim(),
    stderr: stderr.trim(),
    exitCode: proc.exitCode ?? 0,
  };
}

/** Extract the `value` field from a { type, value } envelope JSON string. */
function envValue(json: string): unknown {
  return (JSON.parse(json.trim()) as { value: unknown }).value;
}

describe("@ Alias Resolution - put", () => {
  test("ocas put @string <file> should resolve alias", async () => {
    await runCliAlias("init");

    const payloadFile = join(testDir, "payload.json");
    writeFileSync(payloadFile, JSON.stringify("hello world"));

    const { stdout, stderr, exitCode } = await runCliAlias(
      "put",
      "@string",
      payloadFile,
    );

    expect(exitCode).toBe(0);
    expect(stderr).toBe("");
    // Should output an envelope whose value is a valid hash (13 chars)
    expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
  });

  test("ocas put @number <file> should resolve alias", async () => {
    await runCliAlias("init");

    const payloadFile = join(testDir, "payload.json");
    writeFileSync(payloadFile, "42");

    const { stdout, exitCode } = await runCliAlias(
      "put",
      "@number",
      payloadFile,
    );

    expect(exitCode).toBe(0);
    expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
  });

  test("ocas put @object <file> should resolve alias", async () => {
    await runCliAlias("init");

    const payloadFile = join(testDir, "payload.json");
    writeFileSync(payloadFile, JSON.stringify({ foo: "bar" }));

    const { stdout, exitCode } = await runCliAlias(
      "put",
      "@object",
      payloadFile,
    );

    expect(exitCode).toBe(0);
    expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
  });

  test("ocas put @invalid <file> should fail", async () => {
    await runCliAlias("init");

    const payloadFile = join(testDir, "payload.json");
    writeFileSync(payloadFile, "{}");

    const { stderr, exitCode } = await runCliAlias(
      "put",
      "@invalid",
      payloadFile,
    );

    expect(exitCode).not.toBe(0);
    expect(stderr.length).toBeGreaterThan(0);
  });

  test("ocas put @schema with nested type constraints should succeed", async () => {
    await runCliAlias("init");

    const schemaFile = join(testDir, "constrained-schema.json");
    writeFileSync(
      schemaFile,
      JSON.stringify({
        type: "object",
        properties: {
          name: { type: "string", minLength: 1, maxLength: 50 },
          age: { type: "number", minimum: 0, maximum: 150 },
          tags: {
            type: "array",
            items: { type: "string" },
            minItems: 1,
            uniqueItems: true,
          },
        },
        required: ["name"],
      }),
    );

    const { stdout, stderr, exitCode } = await runCliAlias(
      "put",
      "@schema",
      schemaFile,
    );

    expect(exitCode).toBe(0);
    expect(stderr).toBe("");
    expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
  });
});

describe("@ Alias Resolution - hash", () => {
  test("ocas hash @string <file> should compute hash without storing", async () => {
    await runCliAlias("init");

    const payloadFile = join(testDir, "payload.json");
    writeFileSync(payloadFile, JSON.stringify("test"));

    const { stdout, stderr, exitCode } = await runCliAlias(
      "hash",
      "@string",
      payloadFile,
    );

    expect(exitCode).toBe(0);
    expect(stderr).toBe("");
    expect(envValue(stdout)).toMatch(/^[0-9A-HJKMNP-TV-Z]{13}$/);
  });
});