/**
 * @file Tests for server/lib/ci-status.js against a fake `gh` binary that
 * returns canned `run list`/`run view` JSON for each scenario this module
 * has to classify: no run yet, an in-progress run, a green run, and a red
 * run — plus branch-vs-sha ref detection.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */
const { describe, it, after } = require("node:test");
const assert = require("node:assert/strict");
const fs = require("node:fs");
const os = require("node:os");
const path = require("node:path");

const ROOT = fs.mkdtempSync(path.join(os.tmpdir(), "agenthub-ci-status-"));
const { ciStatus } = require("../lib/ci-status");

/**
 * Fake `gh` that branches on the subcommand: `run list` returns `listJson`,
 * `run view` returns `viewJson`. Also records every invocation's args (one
 * line per call, space-joined) to `$CALLS_LOG` so a test can assert which
 * flag (--branch vs --commit) was used.
 */
function stubGh(listJson, viewJson) {
  const bin = path.join(ROOT, `bin-${Date.now()}-${Math.random().toString(36).slice(2)}`);
  fs.mkdirSync(bin, { recursive: true });
  const callsLog = path.join(bin, "calls.log");
  fs.writeFileSync(callsLog, "");
  const script = `#!/usr/bin/env bash
echo "$@" >> "${callsLog}"
if [ "$1" = "run" ] && [ "$2" = "list" ]; then
  cat <<'EOF'
${JSON.stringify(listJson)}
EOF
  exit 0
fi
if [ "$1" = "run" ] && [ "$2" = "view" ]; then
  cat <<'EOF'
${JSON.stringify(viewJson)}
EOF
  exit 0
fi
echo "unexpected gh invocation: $@" >&2
exit 1
`;
  fs.writeFileSync(path.join(bin, "gh"), script);
  fs.chmodSync(path.join(bin, "gh"), 0o755);
  const originalPath = process.env.PATH;
  process.env.PATH = `${bin}${path.delimiter}${originalPath}`;
  return {
    calls: () => fs.readFileSync(callsLog, "utf8").trim().split("\n").filter(Boolean),
    restore: () => {
      process.env.PATH = originalPath;
    },
  };
}

after(() => fs.rmSync(ROOT, { recursive: true, force: true }));

describe("ciStatus()", () => {
  it("reports pending when no run exists yet for the ref", async () => {
    const stub = stubGh([], {});
    try {
      const result = await ciStatus(ROOT, "development");
      assert.deepEqual(result, { state: "pending", ref: "development", checks: [] });
    } finally {
      stub.restore();
    }
  });

  it("reports pending when the latest run is still in progress", async () => {
    const stub = stubGh([{ databaseId: 1, status: "in_progress", conclusion: null }], {
      jobs: [{ name: "server-tests", status: "in_progress", conclusion: null, url: null }],
    });
    try {
      const result = await ciStatus(ROOT, "development");
      assert.equal(result.state, "pending");
    } finally {
      stub.restore();
    }
  });

  it("reports success when the latest run completed clean", async () => {
    const stub = stubGh([{ databaseId: 2, status: "completed", conclusion: "success" }], {
      jobs: [
        { name: "server-tests", status: "completed", conclusion: "success", url: "https://x/1" },
        { name: "client-tests", status: "completed", conclusion: "skipped", url: "https://x/2" },
      ],
    });
    try {
      const result = await ciStatus(ROOT, "development");
      assert.equal(result.state, "success");
      assert.equal(result.checks.length, 2);
    } finally {
      stub.restore();
    }
  });

  it("reports failure when any job failed", async () => {
    const stub = stubGh([{ databaseId: 3, status: "completed", conclusion: "failure" }], {
      jobs: [
        { name: "server-tests", status: "completed", conclusion: "failure", url: "https://x/3" },
      ],
    });
    try {
      const result = await ciStatus(ROOT, "development");
      assert.equal(result.state, "failure");
      assert.equal(result.checks[0].conclusion, "failure");
    } finally {
      stub.restore();
    }
  });

  it("uses --commit for a sha-shaped ref and --branch otherwise", async () => {
    const stub = stubGh([], {});
    try {
      await ciStatus(ROOT, "a1b2c3d");
      await ciStatus(ROOT, "feat/some-slug");
      const calls = stub.calls().filter((line) => line.startsWith("run list"));
      assert.match(calls[0], /--commit a1b2c3d/);
      assert.match(calls[1], /--branch feat\/some-slug/);
    } finally {
      stub.restore();
    }
  });
});