/**
 * MCP 工具单元测试
 * 覆盖：工具注册完整性、删除两步式确认、只读模式下拒绝写操作
 * 运行：npm test
 */
const test = require("node:test");
const assert = require("node:assert");
const fs = require("node:fs");
const os = require("node:os");
const path = require("node:path");
const { createMcpServer } = require("../src/mcp/tools");
const { init, loadSystem, saveSystem } = require("../src/persistence/duckdbAdapter");

// 使用临时数据目录，避免污染真实 data/
const tmpDataDir = fs.mkdtempSync(path.join(os.tmpdir(), "registry-mcp-test-"));
process.env.REGISTRY_DATA_DIR = tmpDataDir;

let server;
let originalMode = "edit";

// 初始化 DuckDB，记录测试前模式；测试结束后恢复原模式
test.before(async () => {
  await init();
  originalMode = (await loadSystem() || {}).mode || "edit";
  server = createMcpServer();
});

test.after(async () => {
  const system = await loadSystem() || {};
  system.mode = originalMode;
  await saveSystem(system);
});

/**
 * 直接调用已注册工具的处理函数
 * @param {string} name - 工具名
 * @param {Object} args - 工具参数
 * @returns {Promise<Object>} 工具结果
 */
async function callTool(name, args) {
  const tool = server._registeredTools[name];
  assert.ok(tool, `工具不存在: ${name}`);
  try {
    const result = await tool.handler(args, {});
    return {
      text: (result.content || []).map((c) => c.text).join("\n"),
      structuredContent: result.structuredContent,
      isError: result.isError === true,
    };
  } catch (err) {
    // 直接调用底层 handler 时，抛错不会自动转换为 isError 结果，这里统一转换
    return {
      text: err && err.message ? err.message : String(err),
      structuredContent: { error: true },
      isError: true,
    };
  }
}

test("注册了全部项目/配置 CRUD 及确认删除工具", () => {
  const names = new Set(Object.keys(server._registeredTools));
  for (const name of [
    "get_mode", "set_mode",
    "list_projects", "get_project", "create_project", "update_project_mappings",
    "delete_project", "confirm_delete_project",
    "list_configs", "get_config", "create_config", "update_config",
    "delete_config", "confirm_delete_config",
  ]) {
    assert.ok(names.has(name), `缺少工具: ${name}`);
  }
});

test("删除项目为两步式：先登记待确认，确认后才真正删除", async () => {
  const { text: createText } = await callTool("create_project", {
    name: "MCP-Unittest-Proj",
  });
  const project = JSON.parse(createText.match(/\{[\s\S]*\}/)[0]);
  const pid = project.id;

  const del = await callTool("delete_project", { projectId: pid });
  assert.strictEqual(del.structuredContent.status, "awaiting_confirmation");
  assert.ok(del.structuredContent.confirmation_token);

  // 未确认前项目仍然存在
  const stillThere = await callTool("get_project", { projectId: pid });
  assert.ok(!stillThere.isError);

  // 确认后项目被删除
  const confirm = await callTool("confirm_delete_project", {
    confirmation_token: del.structuredContent.confirmation_token,
  });
  assert.strictEqual(confirm.structuredContent.status, "deleted");
  const gone = await callTool("get_project", { projectId: pid });
  assert.ok(gone.isError, "确认删除后项目应不存在");
});

test("重复使用确认令牌会失败（一次性令牌）", async () => {
  const { text: createText } = await callTool("create_project", { name: "MCP-Unittest-Token" });
  const project = JSON.parse(createText.match(/\{[\s\S]*\}/)[0]);
  const del = await callTool("delete_project", { projectId: project.id });
  const tok = del.structuredContent.confirmation_token;

  await callTool("confirm_delete_project", { confirmation_token: tok });
  const second = await callTool("confirm_delete_project", { confirmation_token: tok });
  assert.ok(second.isError);
  assert.strictEqual(second.structuredContent.status, "invalid_or_expired");
});

test("readonly 模式下拒绝项目/配置写操作，切换回 edit 后恢复", async () => {
  await callTool("set_mode", { mode: "readonly" });

  const createProject = await callTool("create_project", { name: "不应创建" });
  assert.ok(createProject.isError);
  assert.match(createProject.text, /只读模式/);

  const delProject = await callTool("delete_project", { projectId: "proj-mrlip49o-qsr2yx" });
  assert.ok(delProject.isError);
  assert.match(delProject.text, /只读模式/);

  const createConfig = await callTool("create_config", {
    projectId: "proj-mrlip49o-qsr2yx",
    key: "x",
    description: "x",
  });
  assert.ok(createConfig.isError);
  assert.match(createConfig.text, /只读模式/);

  await callTool("set_mode", { mode: "edit" });
});

test("edit 模式下可以修改配置说明", async () => {
  await callTool("set_mode", { mode: "edit" });

  const { text: createText } = await callTool("create_project", { name: "MCP-Unittest-Desc" });
  const project = JSON.parse(createText.match(/\{[\s\S]*\}/)[0]);

  const cfg = await callTool("create_config", {
    projectId: project.id,
    key: "db/host",
    description: "原始说明",
    value: "localhost",
  });
  const cfgObj = JSON.parse(cfg.text.match(/\{[\s\S]*\}/)[0]);

  const updated = await callTool("update_config", {
    projectId: project.id,
    configId: cfgObj.id,
    description: "新的说明",
  });
  assert.ok(!updated.isError, "edit 模式下应允许修改说明");
  const updatedObj = JSON.parse(updated.text.match(/\{[\s\S]*\}/)[0]);
  assert.strictEqual(updatedObj.description, "新的说明");
  assert.strictEqual(updatedObj.value, "localhost", "仅改说明，值不应变化");

  // 清理测试项目
  const delProject = await callTool("delete_project", { projectId: project.id });
  const confirmProject = await callTool("confirm_delete_project", {
    confirmation_token: delProject.structuredContent.confirmation_token,
  });
  assert.strictEqual(confirmProject.structuredContent.status, "deleted");
});

test("配置删除同样为两步式确认", async () => {
  const { text: createText } = await callTool("create_project", { name: "MCP-Unittest-Cfg" });
  const project = JSON.parse(createText.match(/\{[\s\S]*\}/)[0]);

  const cfg = await callTool("create_config", {
    projectId: project.id,
    key: "a/b",
    description: "unit",
    value: "1",
    type: "number",
  });
  const cfgObj = JSON.parse(cfg.text.match(/\{[\s\S]*\}/)[0]);

  const del = await callTool("delete_config", { projectId: project.id, configId: cfgObj.id });
  assert.strictEqual(del.structuredContent.status, "awaiting_confirmation");

  const confirm = await callTool("confirm_delete_config", {
    confirmation_token: del.structuredContent.confirmation_token,
  });
  assert.strictEqual(confirm.structuredContent.status, "deleted");

  // 清理测试项目
  const delProject = await callTool("delete_project", { projectId: project.id });
  const confirmProject = await callTool("confirm_delete_project", {
    confirmation_token: delProject.structuredContent.confirmation_token,
  });
  assert.strictEqual(confirmProject.structuredContent.status, "deleted");
});