import { spawnSync } from "node:child_process";
import fs from "node:fs";
import os from "node:os";
import path from "node:path";
import { describe, expect, it } from "vitest";
import { deleteStalePromptSnapshotFiles } from "../../scripts/prompt-snapshot-files.js";
import {
  defaultCatalogPathCandidates,
  findDefaultCatalogPath,
  renderCodexModelInstructions,
  runCodexModelPromptFixtureSync,
} from "../../scripts/sync-codex-model-prompt-fixture.js";
import { expectNoReaddirSyncDuring } from "../../src/test-utils/fs-scan-assertions.js";
import { toRepoRelativePath } from "../../src/test-utils/repo-files.js";
import {
  CODEX_MODEL_PROMPT_FIXTURE_DIR,
  CODEX_RUNTIME_HAPPY_PATH_PROMPT_SNAPSHOT_DIR,
} from "../helpers/agents/prompt-snapshot-paths.js";

function readCommittedSnapshot(fileName: string): string {
  return fs.readFileSync(path.join(CODEX_RUNTIME_HAPPY_PATH_PROMPT_SNAPSHOT_DIR, fileName), "utf8");
}

function renderedPromptSection(content: string, heading: string, nextHeading: string): string {
  const start = content.indexOf(heading);
  const end = content.indexOf(nextHeading, start + heading.length);
  if (start === -1 || end === -1) {
    throw new Error(`Missing rendered prompt section ${heading}`);
  }
  return content.slice(start, end);
}

function listCommittedPromptSnapshotFiles(): string[] {
  const externalFiles = listExternalCommittedPromptSnapshotFiles();
  if (externalFiles) {
    return externalFiles;
  }
  return fs
    .readdirSync(CODEX_RUNTIME_HAPPY_PATH_PROMPT_SNAPSHOT_DIR)
    .filter((entry) => entry.endsWith(".md") || entry.endsWith(".json"))
    .map((entry) => path.join(CODEX_RUNTIME_HAPPY_PATH_PROMPT_SNAPSHOT_DIR, entry))
    .toSorted();
}

function listExternalCommittedPromptSnapshotFiles(): string[] | null {
  return listGitCommittedPromptSnapshotFiles() ?? listFindCommittedPromptSnapshotFiles();
}

function listGitCommittedPromptSnapshotFiles(): string[] | null {
  const result = spawnSync(
    "git",
    ["ls-files", "--", CODEX_RUNTIME_HAPPY_PATH_PROMPT_SNAPSHOT_DIR],
    {
      cwd: process.cwd(),
      encoding: "utf8",
      maxBuffer: 1024 * 1024,
      stdio: ["ignore", "pipe", "ignore"],
    },
  );
  if (result.status !== 0) {
    return null;
  }
  return result.stdout
    .split("\n")
    .map((line) => line.trim())
    .filter((line) => line.endsWith(".md") || line.endsWith(".json"))
    .toSorted();
}

function listFindCommittedPromptSnapshotFiles(): string[] | null {
  const result = spawnSync(
    "find",
    [
      path.join(process.cwd(), CODEX_RUNTIME_HAPPY_PATH_PROMPT_SNAPSHOT_DIR),
      "-maxdepth",
      "1",
      "-type",
      "f",
      "(",
      "-name",
      "*.md",
      "-o",
      "-name",
      "*.json",
      ")",
    ],
    {
      cwd: process.cwd(),
      encoding: "utf8",
      maxBuffer: 1024 * 1024,
      stdio: ["ignore", "pipe", "ignore"],
    },
  );
  if (result.status !== 0) {
    return null;
  }
  return result.stdout
    .split("\n")
    .map((line) => line.trim())
    .filter((line) => line.length > 0)
    .map((filePath) => toRepoRelativePath(process.cwd(), filePath))
    .toSorted();
}

describe("happy path prompt snapshots", () => {
  it("lists committed Codex prompt snapshot artifacts without scanning directories in-process", () => {
    expectNoReaddirSyncDuring(() => {
      const committed = listCommittedPromptSnapshotFiles();

      expect(committed.length).toBeGreaterThan(0);
      expect(committed.every((file) => file.endsWith(".md") || file.endsWith(".json"))).toBe(true);
    });
  });

  it("keeps the committed Codex prompt snapshot artifact set explicit", () => {
    expect(listCommittedPromptSnapshotFiles().map((file) => path.basename(file))).toEqual([
      "README.md",
      "codex-dynamic-tools.discord-group.json",
      "codex-dynamic-tools.heartbeat-turn.json",
      "codex-dynamic-tools.telegram-direct.json",
      "discord-group-codex-message-tool.md",
      "telegram-direct-codex-message-tool.md",
      "telegram-heartbeat-codex-tool.md",
    ]);
  });

  it("deletes stale generated snapshot artifacts", async () => {
    const root = fs.mkdtempSync(path.join(os.tmpdir(), "openclaw-prompt-snapshot-stale-"));
    try {
      const snapshotDir = path.join(root, CODEX_RUNTIME_HAPPY_PATH_PROMPT_SNAPSHOT_DIR);
      fs.mkdirSync(snapshotDir, { recursive: true });
      const stalePath = path.join(
        CODEX_RUNTIME_HAPPY_PATH_PROMPT_SNAPSHOT_DIR,
        "stale-snapshot.md",
      );
      fs.writeFileSync(path.join(root, stalePath), "stale\n");

      const deleted = await deleteStalePromptSnapshotFiles(root, [
        { path: path.join(CODEX_RUNTIME_HAPPY_PATH_PROMPT_SNAPSHOT_DIR, "current.md") },
      ]);

      expect(deleted).toEqual([stalePath]);
      expect(fs.existsSync(path.join(root, stalePath))).toBe(false);
    } finally {
      fs.rmSync(root, { recursive: true, force: true });
    }
  });

  it("renders the Codex model-bound prompt layers", async () => {
    const telegram = readCommittedSnapshot("telegram-direct-codex-message-tool.md");

    expect(telegram).toContain("## Reconstructed Model-Bound Prompt Layers");
    expect(telegram).toContain("### System: Codex Model Instructions (gpt-5.5, pragmatic)");
    expect(telegram).toContain("You are Codex, a coding agent based on GPT-5.");
    expect(telegram).toContain("### Developer: Codex Permission Instructions");
    expect(telegram).toContain(
      "Approval policy is currently never. Do not provide the `sandbox_permissions`",
    );
    expect(telegram).toContain("### User: Codex Config Instructions");
    expect(telegram).toContain("### User: Turn Input Text");
    expect(telegram).toContain("OpenClaw runtime context for this turn:");
    expect(telegram).toContain("<SOUL.md contents will be here>");
    expect(telegram).toContain("<IDENTITY.md contents will be here>");
    expect(telegram).toContain("<TOOLS.md contents will be here>");
    expect(telegram).toContain("<USER.md contents will be here>");
    expect(telegram).toContain("<MEMORY.md contents will be here>");
    expect(telegram).not.toContain("<HEARTBEAT.md contents will be here>");
    expect(telegram).toContain("Codex loads AGENTS.md natively");
    expect(telegram).toContain("### Tools: Dynamic Tool Catalog");
  });

  it("keeps heartbeat guidance in heartbeat collaboration mode only", async () => {
    const direct = readCommittedSnapshot("telegram-direct-codex-message-tool.md");
    const group = readCommittedSnapshot("discord-group-codex-message-tool.md");
    const heartbeat = readCommittedSnapshot("telegram-heartbeat-codex-tool.md");
    const heartbeatPhrase = "Use heartbeats to create useful proactive progress";
    const agentSoulHeading = "## OpenClaw Agent Soul";

    expect(direct).toContain('"collaborationMode": {');
    expect(direct).toContain('"developer_instructions": "# Collaboration Mode: Default');
    expect(direct).toContain(agentSoulHeading);
    expect(group).toContain('"collaborationMode": {');
    expect(group).toContain('"developer_instructions": "# Collaboration Mode: Default');
    expect(group).toContain(agentSoulHeading);
    expect(direct).not.toContain(heartbeatPhrase);
    expect(group).not.toContain(heartbeatPhrase);
    expect(direct).not.toContain("This is an OpenClaw heartbeat turn.");
    expect(group).not.toContain("This is an OpenClaw heartbeat turn.");

    expect(heartbeat).toContain('"collaborationMode": {');
    expect(heartbeat).toContain('"developer_instructions": "This is an OpenClaw heartbeat turn.');
    expect(heartbeat).toContain(agentSoulHeading);
    const openClawRuntimeInstructions = renderedPromptSection(
      heartbeat,
      "### Developer: OpenClaw Runtime Instructions",
      "### Developer: Codex Collaboration Mode Instructions",
    );
    const collaborationModeInstructions = renderedPromptSection(
      heartbeat,
      "### Developer: Codex Collaboration Mode Instructions",
      "### User: Turn Input Text",
    );

    expect(openClawRuntimeInstructions).not.toContain(heartbeatPhrase);
    expect(collaborationModeInstructions).toContain(heartbeatPhrase);
    expect(collaborationModeInstructions).toContain("HEARTBEAT.md exists");
    expect(collaborationModeInstructions).toContain(
      "/tmp/openclaw-happy-path/workspace/HEARTBEAT.md",
    );
    expect(collaborationModeInstructions).not.toContain("<HEARTBEAT.md contents will be here>");
    expect(collaborationModeInstructions.split(heartbeatPhrase)).toHaveLength(2);
  });

  it("keeps the Codex model prompt fixture next to its source metadata", () => {
    expect(
      fs.existsSync(path.join(CODEX_MODEL_PROMPT_FIXTURE_DIR, "gpt-5.5.pragmatic.instructions.md")),
    ).toBe(true);
    expect(
      fs.existsSync(path.join(CODEX_MODEL_PROMPT_FIXTURE_DIR, "gpt-5.5.pragmatic.source.json")),
    ).toBe(true);
  });

  it("renders Codex model catalog instructions with the selected personality", () => {
    const rendered = renderCodexModelInstructions({
      model: {
        slug: "gpt-5.5",
        base_instructions: "fallback",
        model_messages: {
          instructions_template: "Intro\n{{ personality }}\nEnd",
          instructions_variables: {
            personality_pragmatic: "Pragmatic voice",
          },
        },
      },
      personality: "pragmatic",
    });

    expect(rendered).toEqual({
      instructions: "Intro\nPragmatic voice\nEnd",
      field:
        "model_messages.instructions_template + model_messages.instructions_variables.personality_pragmatic",
    });
  });

  it("prefers the Codex runtime model cache before local checkout fallbacks", () => {
    const candidates = defaultCatalogPathCandidates({
      env: { CODEX_HOME: "/tmp/codex-home" },
      homeDir: "/tmp/home",
    });

    expect(candidates).toEqual([
      path.join("/tmp/codex-home", "models_cache.json"),
      path.join("/tmp/home", ".codex", "models_cache.json"),
      path.join("/tmp/home", "code", "codex", "codex-rs", "models-manager", "models.json"),
    ]);
  });

  it("finds the first available default Codex model catalog source", async () => {
    const root = fs.mkdtempSync(path.join(os.tmpdir(), "openclaw-codex-catalog-"));
    try {
      const cachePath = path.join(root, ".codex", "models_cache.json");
      fs.mkdirSync(path.dirname(cachePath), { recursive: true });
      fs.writeFileSync(cachePath, JSON.stringify({ models: [] }));

      await expect(findDefaultCatalogPath({ env: {}, homeDir: root })).resolves.toEqual({
        catalogPath: cachePath,
        candidates: [
          cachePath,
          path.join(root, "code", "codex", "codex-rs", "models-manager", "models.json"),
        ],
      });
    } finally {
      fs.rmSync(root, { recursive: true, force: true });
    }
  });

  it("skips Codex model prompt fixture sync when no default catalog exists", async () => {
    const root = fs.mkdtempSync(path.join(os.tmpdir(), "openclaw-codex-catalog-missing-"));
    const chunks: string[] = [];
    try {
      const result = await runCodexModelPromptFixtureSync([], {
        env: {},
        homeDir: root,
        stdout: {
          write(chunk) {
            chunks.push(chunk);
          },
        },
      });

      expect(result.status).toBe("skipped");
      expect(chunks.join("")).toContain("No Codex model catalog/cache found");
    } finally {
      fs.rmSync(root, { recursive: true, force: true });
    }
  });
});