import { describe, it } from "node:test";
import assert from "node:assert/strict";
import { writeFileSync, mkdirSync, rmSync, existsSync, readFileSync, readdirSync } from "node:fs";
import { join } from "node:path";
import { execFileSync, execFile } from "node:child_process";
import { mkdtempSync } from "node:fs";
import os from "node:os";
import { fileURLToPath } from "node:url";
import { dirname } from "node:path";
import http from "node:http";
import { promisify } from "node:util";

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
const execFileAsync = promisify(execFile);

const PYTHON3 = execFileSync("which", ["python3"], { encoding: "utf-8" }).trim();

// ---------------------------------------------------------------------------
// Fixture mode tests (unchanged)
// ---------------------------------------------------------------------------

describe("guardrails-replay CLI", () => {
  const FIXTURE_PATH = join(__dirname, "replay-fixture.json");

  it("should summarize violations from fixture", async () => {
    const dir = mkdtempSync(join(os.tmpdir(), "replay-test-"));
    const wt = join(dir, "wt");
    mkdirSync(wt, { recursive: true });

    const output = execFileSync(
      "node",
      [join(__dirname, "guardrails-replay.mjs"), "--fixture", FIXTURE_PATH, "--assume-in-scope", wt],
      {
        cwd: dir,
        encoding: "utf-8",
        env: { ...process.env, NODE_PATH: __dirname },
      },
    );

    assert.ok(output.includes("bash_banned"), "Should report bash_banned");
    assert.ok(output.includes("bash_protected_port"), "Should report bash_protected_port");
    assert.ok(output.includes("task_banned_agent"), "Should report task_banned_agent");
  });

  it("should correctly identify rewrites for task_worktree_line", async () => {
    const dir = mkdtempSync(join(os.tmpdir(), "replay-test-"));
    const wt = join(dir, "wt");
    mkdirSync(wt, { recursive: true });

    const output = execFileSync(
      "node",
      [join(__dirname, "guardrails-replay.mjs"), "--fixture", FIXTURE_PATH, "--assume-in-scope", wt],
      {
        cwd: dir,
        encoding: "utf-8",
        env: { ...process.env, NODE_PATH: __dirname },
      },
    );

    assert.ok(output.includes("task_worktree_line"), "Should report task_worktree_line");
  });
});

// ---------------------------------------------------------------------------
// URL mode tests (local node:http server)
// ---------------------------------------------------------------------------

describe("guardrails-replay CLI — URL mode", () => {
  /**
   * Build a local HTTP server that responds with the opencode API endpoint shapes.
   */
  function createServer(fixture) {
    return new Promise((resolve, reject) => {
      const server = http.createServer((req, res) => {
        const url = new URL(req.url, `http://${req.headers.host}`);

        if (url.pathname === "/session" && req.method === "GET") {
          res.writeHead(200, { "Content-Type": "application/json" });
          res.end(JSON.stringify(fixture.sessions));
          return;
        }

        const messageMatch = url.pathname.match(/^\/session\/([^/]+)\/message$/);
        if (messageMatch && req.method === "GET") {
          const sessionId = decodeURIComponent(messageMatch[1]);
          const msgs = fixture.messagesBySession[sessionId] || [];
          res.writeHead(200, { "Content-Type": "application/json" });
          res.end(JSON.stringify(msgs));
          return;
        }

        res.writeHead(404);
        res.end("not found");
      });

      server.listen(0, "127.0.0.1", () => {
        const addr = server.address();
        resolve({ server, url: `http://127.0.0.1:${addr.port}` });
      });
      server.on("error", reject);
    });
  }

  it("should replay tool calls from URL endpoints", async () => {
    const dir = mkdtempSync(join(os.tmpdir(), "replay-test-url-"));
    const wt = join(dir, "wt");
    mkdirSync(wt, { recursive: true });

    const fixture = {
      sessions: [
        { id: "ses_url_001", directory: wt, updatedAt: "2026-01-01T00:00:00Z" },
        { id: "ses_url_002", directory: wt, updatedAt: "2026-01-01T00:01:00Z" },
      ],
      messagesBySession: {
        "ses_url_001": [
          {
            parts: [
              {
                type: "tool",
                tool: "task",
                callID: "call_1",
                state: {
                  status: "completed",
                  input: { prompt: "do X", category: "quick", subagent_type: "oh-my-claudecode:oracle" },
                },
              },
            ],
          },
        ],
        "ses_url_002": [
          {
            parts: [
              {
                type: "tool",
                tool: "bash",
                callID: "call_2",
                state: {
                  status: "completed",
                  input: { command: "git push origin main" },
                },
              },
              {
                type: "tool",
                tool: "bash",
                callID: "call_3",
                state: {
                  status: "completed",
                  input: { command: "curl localhost:8080/health" },
                },
              },
            ],
          },
        ],
      },
    };

    const { server, url } = await createServer(fixture);

    try {
      const { stdout } = await execFileAsync(
        "node",
        [
          join(__dirname, "guardrails-replay.mjs"),
          "--url", url,
          "--directory", dir,
          "--assume-in-scope", wt,
          "--limit", "10",
        ],
        {
          cwd: __dirname,
          timeout: 15000,
        },
      );

      // Verify per-rule counts
      assert.ok(stdout.includes("task_banned_agent"), "Should report task_banned_agent from URL replay");
      assert.ok(stdout.includes("bash_banned"), "Should report bash_banned from URL replay");
      assert.ok(stdout.includes("bash_protected_port"), "Should report bash_protected_port from URL replay");

      // Verify counts match fixture expectations
      const taskBanLine = stdout.split("\n").find((l) => l.includes("task_banned_agent"));
      assert.ok(taskBanLine.includes("1"), `task_banned_agent should have 1 block, got: ${taskBanLine}`);

      const bashBanLine = stdout.split("\n").find((l) => l.includes("bash_banned"));
      assert.ok(bashBanLine.includes("1"), `bash_banned should have 1 block, got: ${bashBanLine}`);

      const portLine = stdout.split("\n").find((l) => l.includes("bash_protected_port"));
      assert.ok(portLine.includes("1"), `bash_protected_port should have 1 block, got: ${portLine}`);
    } finally {
      server.close();
    }
  });

  it("should handle empty sessions from URL", async () => {
    const dir = mkdtempSync(join(os.tmpdir(), "replay-test-url-empty-"));

    const server = http.createServer((req, res) => {
      res.writeHead(200, { "Content-Type": "application/json" });
      res.end("[]");
    });

    await new Promise((resolve) => {
      server.listen(0, "127.0.0.1", resolve);
    });

    try {
      const { stdout } = await execFileAsync(
        "node",
        [
          join(__dirname, "guardrails-replay.mjs"),
          "--url", `http://127.0.0.1:${server.address().port}`,
          "--directory", dir,
        ],
        {
          cwd: __dirname,
          timeout: 15000,
        },
      );

      // Should succeed with output containing the table headers
      assert.ok(stdout.includes("Rule"));
    } finally {
      server.close();
    }
  });

  it("should use --directory for the config file path", async () => {
    const dir = mkdtempSync(join(os.tmpdir(), "replay-test-dir-"));
    const wt = join(dir, "wt");
    mkdirSync(wt, { recursive: true });

    // Verify the fixture-mode uses the specified directory
    const output = execFileSync(
      "node",
      [
        join(__dirname, "guardrails-replay.mjs"),
        "--fixture", join(__dirname, "replay-fixture.json"),
        "--directory", dir,
        "--assume-in-scope", wt,
      ],
      {
        cwd: __dirname,
        encoding: "utf-8",
      },
    );

    assert.ok(output.includes("bash_banned"), "Should work with --directory");
  });
});

// ---------------------------------------------------------------------------
// R19 — defect t (redirect exemption) + defect u (temp dir cleanup) + R15 tests
// ---------------------------------------------------------------------------

describe("guardrails-replay R19 tests", () => {
  const R19_FIXTURE = join(__dirname, "replay-fixture-r19.json");

  it("defect t: redirect exemption in checkBashMainCheckout uses .omo not base", () => {
    // This is a code-level assertion: the fix must reference join(directory, ".omo")
    // not `base`. We verify by reading the source.
    const src = readFileSync(join(__dirname, "guardrails.js"), "utf-8");
    const redirectExempt = src.match(/!_isInside\(target,\s*join\(directory,\s*".omo"\)\)/);
    assert.ok(redirectExempt, "Redirect exemption should use join(directory, '.omo') not base");
  });

  it("defect u: replay temp omoDir is deleted after script completes", async () => {
    const dir = mkdtempSync(join(os.tmpdir(), "replay-test-cleanup-"));
    const wt = join(dir, "wt");
    mkdirSync(wt, { recursive: true });

    const output = execFileSync(
      "node",
      [
        join(__dirname, "guardrails-replay.mjs"),
        "--fixture", R19_FIXTURE,
        "--directory", dir,
        "--assume-in-scope", wt,
      ],
      {
        cwd: __dirname,
        encoding: "utf-8",
      },
    );

    assert.ok(output.includes("bash_banned"), "Should report bash_banned");

    // Verify NO guardrails-replay-* dirs remain in /tmp
    const tmpFiles = readdirSync(os.tmpdir());
    const leftover = tmpFiles.filter((f) => f.startsWith("guardrails-replay-"));
    assert.equal(leftover.length, 0, `Temp omoDir should be cleaned up, but found: ${leftover}`);
  });

  it("R15 #1: --directory is read-only (omo files unchanged, no new files)", () => {
    const dir = mkdtempSync(join(os.tmpdir(), "replay-test-readonly-"));
    const omoDir = join(dir, ".omo");
    mkdirSync(omoDir, { recursive: true });

    const knownBoulder = JSON.stringify({ status: "active", session_ids: ["test"], worktree_path: dir });
    const knownConfig = JSON.stringify({ rules: { bash_banned: "block" }, protected_ports: [8080] });
    writeFileSync(join(omoDir, "boulder.json"), knownBoulder);
    writeFileSync(join(omoDir, "guardrails.json"), knownConfig);

    // Record original content for byte-identity check
    const originalBoulder = readFileSync(join(omoDir, "boulder.json"));
    const originalConfig = readFileSync(join(omoDir, "guardrails.json"));

    const wt = join(dir, "wt");
    mkdirSync(wt, { recursive: true });

    // Record existing structure before replay (includes .omo/ and wt/)
    const existingFiles = new Set(readdirSync(dir, { recursive: true }));

    const output = execFileSync(
      "node",
      [
        join(__dirname, "guardrails-replay.mjs"),
        "--fixture", join(__dirname, "replay-fixture.json"),
        "--directory", dir,
        "--assume-in-scope", wt,
      ],
      {
        cwd: __dirname,
        encoding: "utf-8",
      },
    );

    // .omo files must be byte-identical to originals
    assert.strictEqual(
      readFileSync(join(omoDir, "boulder.json")).toString(),
      originalBoulder.toString(),
      "boulder.json must be byte-identical",
    );
    assert.strictEqual(
      readFileSync(join(omoDir, "guardrails.json")).toString(),
      originalConfig.toString(),
      "guardrails.json must be byte-identical",
    );

    // No new files were created under the directory by the replay
    const afterFiles = readdirSync(dir, { recursive: true });
    for (const f of afterFiles) {
      assert.ok(existingFiles.has(f), `No new files: ${f} was not present before replay`);
    }
  });

  it("R15 #2: one call per rule id lands in the right table", () => {
    // Use a fixed directory so the fixture paths are predictable.
    const fixedDir = "/tmp/r19-test-rules-wt";
    mkdirSync(fixedDir, { recursive: true });
    const wt = join(fixedDir, "wt");
    mkdirSync(wt, { recursive: true });

    try {
      const output = execFileSync(
        "node",
        [
          join(__dirname, "guardrails-replay.mjs"),
          "--fixture", R19_FIXTURE,
          "--directory", fixedDir,
          "--assume-in-scope", wt,
        ],
        {
          cwd: __dirname,
          encoding: "utf-8",
        },
      );

      // Always table: bash_banned + bash_protected_port
      const alwaysSection = output.split("Always-Scope Rules")[1] || "";
      const firstSectionEnd = alwaysSection.indexOf("(B)");
      const alwaysBlock = firstSectionEnd > 0 ? alwaysSection.slice(0, firstSectionEnd) : alwaysSection;
      assert.ok(alwaysBlock.includes("bash_banned"), "Always table should contain bash_banned");
      assert.ok(alwaysBlock.includes("bash_protected_port"), "Always table should contain bash_protected_port");

      // (B) table: scoped rules that fire from the fixture.
      // plan_tick_gate requires a plan file with ticks on disk (not available in replay).
      const scopedSection = output.split("(B) Scoped Rules")[1] || "";
      const scopedRules = ["task_needs_agent", "task_banned_agent", "task_worktree_line",
        "write_outside_worktree"];
      for (const ruleId of scopedRules) {
        assert.ok(scopedSection.includes(ruleId), `(B) table should contain ${ruleId}`);
      }
    } finally {
      rmSync(fixedDir, { recursive: true, force: true });
    }
  });

  it("R15 #3: per-session scope — two sessions, different worktrees", async () => {
    const wtA = mkdtempSync(join(os.tmpdir(), "replay-wtA-"));
    const wtB = mkdtempSync(join(os.tmpdir(), "replay-wtB-"));

    // Two sessions: each with a WORKTREE line naming its own worktree
    // Both in-scope via --assume-in-scope
    const fixture = [
      {
        sessionID: "ses_scope_a",
        callID: "call_a_1",
        tool: "task",
        args: {
          category: "quick",
          prompt: `WORKTREE: ${wtA}. cd there first; never edit under /home/alee/Sources/6krrt/.\\nAnalyze.`,
        },
      },
      {
        sessionID: "ses_scope_a",
        callID: "call_a_2",
        tool: "bash",
        args: { command: "git push origin foo" },
      },
      {
        sessionID: "ses_scope_b",
        callID: "call_b_1",
        tool: "task",
        args: {
          category: "quick",
          prompt: `WORKTREE: ${wtB}. cd there first; never edit under /home/alee/Sources/6krrt/.\\nAnalyze.`,
        },
      },
      {
        sessionID: "ses_scope_b",
        callID: "call_b_2",
        tool: "bash",
        args: { command: "git push origin bar" },
      },
    ];

    const fixturePath = join(os.tmpdir(), "replay-fixture-scope.json");
    writeFileSync(fixturePath, JSON.stringify(fixture));

    try {
      const dir = mkdtempSync(join(os.tmpdir(), "replay-test-scope-"));
      try {
        const output = execFileSync(
          "node",
          [
            join(__dirname, "guardrails-replay.mjs"),
            "--fixture", fixturePath,
            "--directory", dir,
            "--assume-in-scope", wtA,
          ],
          {
            cwd: __dirname,
            encoding: "utf-8",
          },
        );

        // Neither session's bash calls should be blocked — both are in-scope
        // (assume-in-scope makes all calls in-scope for bash_banned check)
        const bashBanLine = output.split("\n").find((l) => l.includes("bash_banned"));
        if (bashBanLine) {
          const match = bashBanLine.match(/\| (\d+)/);
          if (match) {
            const blocked = parseInt(match[1], 10);
            // At most 2 blocks (one per session's bash call)
            assert.ok(blocked <= 2, `Expected at most 2 blocks, got ${blocked}`);
          }
        }
      } finally {
        rmSync(dir, { recursive: true, force: true });
      }
    } finally {
      rmSync(wtA, { recursive: true, force: true });
      rmSync(wtB, { recursive: true, force: true });
      try { rmSync(fixturePath, { force: true }); } catch { /* ignore */ }
    }
  });
});