/**
 * 环境数据层：环境/配置的读写，数据存于 chrome.storage.session（解锁后明文）。
 * 首次建口令由 crypto-store.setupVault 完成；加密回写由 background 监听完成。
 */
(function (root, factory) {
  if (typeof module === "object" && module.exports) {
    module.exports = factory({
      getStorage: () => (typeof chrome !== "undefined" ? chrome.storage.session : null),
      getLocalStorage: () => (typeof chrome !== "undefined" ? chrome.storage.local : null),
    });
  } else {
    const api = factory({
      getStorage: () => chrome.storage.session,
      getLocalStorage: () => chrome.storage.local,
    });
    root.EnvStore = api;
  }
})(typeof globalThis !== "undefined" ? globalThis : this, function ({ getStorage, getLocalStorage }) {
  const ENV_KEY = "environments";
  const ACTIVE_ENV_KEY = "activeEnvId";

  function genId() {
    return "env_" + Date.now().toString(36) + Math.random().toString(36).slice(2, 8);
  }

  function genCfgId() {
    return Date.now().toString(36) + Math.random().toString(36).slice(2, 8);
  }

  function storage() {
    const s = getStorage();
    if (!s) throw new Error("chrome.storage.session 不可用");
    return s;
  }


  async function loadEnvironments() {
    const data = await storage().get([ENV_KEY, ACTIVE_ENV_KEY]);
    const environments = data[ENV_KEY] || [];
    const activeEnvId = data[ACTIVE_ENV_KEY] || environments[0]?.id || null;
    return { environments, activeEnvId };
  }

  async function saveEnvironments(environments, activeEnvId) {
    const patch = { [ENV_KEY]: environments };
    if (activeEnvId !== undefined) patch[ACTIVE_ENV_KEY] = activeEnvId;
    await storage().set(patch);
  }

  async function getActiveEnv() {
    const { environments, activeEnvId } = await loadEnvironments();
    return environments.find((e) => e.id === activeEnvId) || environments[0] || null;
  }

  async function setActiveEnv(envId) {
    await storage().set({ [ACTIVE_ENV_KEY]: envId });
  }

  const MAX_ENVIRONMENTS = 5;

  async function createEnvironment(name) {
    const { environments } = await loadEnvironments();
    if (environments.length >= MAX_ENVIRONMENTS) {
      throw new Error(`最多 ${MAX_ENVIRONMENTS} 个环境`);
    }
    const env = { id: genId(), name, configs: [] };
    environments.push(env);
    await saveEnvironments(environments, env.id);
    return env;
  }

  async function renameEnvironment(envId, newName) {
    const { environments } = await loadEnvironments();
    const env = environments.find((e) => e.id === envId);
    if (env) {
      env.name = newName;
      await saveEnvironments(environments);
    }
    return env;
  }

  async function deleteEnvironment(envId) {
    const { environments, activeEnvId } = await loadEnvironments();
    if (environments.length <= 1) {
      throw new Error("至少保留一个环境");
    }
    const idx = environments.findIndex((e) => e.id === envId);
    if (idx === -1) return;
    environments.splice(idx, 1);
    const newActive = activeEnvId === envId ? environments[0].id : activeEnvId;
    await saveEnvironments(environments, newActive);
    // 失败计数存于 local（非敏感），删除环境时一并清理
    const local = getLocalStorage();
    if (local) {
      const attemptsData = await local.get("loginAttempts");
      const attempts = attemptsData.loginAttempts || {};
      Object.keys(attempts).forEach((k) => {
        if (k.startsWith(envId + "::")) delete attempts[k];
      });
      await local.set({ loginAttempts: attempts });
    }
  }


  async function loadConfigs() {
    const env = await getActiveEnv();
    return env?.configs || [];
  }


  async function saveConfigs(configs) {
    const { environments, activeEnvId } = await loadEnvironments();
    const env = environments.find((e) => e.id === activeEnvId);
    if (!env) throw new Error("未找到当前环境");
    env.configs = configs;
    await saveEnvironments(environments);
  }


  async function loadAllConfigs() {
    const { environments } = await loadEnvironments();
    const all = [];
    environments.forEach((env) => {
      (env.configs || []).forEach((cfg) => {
        all.push({ ...cfg, envId: env.id, envName: env.name });
      });
    });
    return all;
  }

  return {
    ENV_KEY,
    ACTIVE_ENV_KEY,
    MAX_ENVIRONMENTS,
    loadEnvironments,
    saveEnvironments,
    getActiveEnv,
    setActiveEnv,
    createEnvironment,
    renameEnvironment,
    deleteEnvironment,
    loadConfigs,
    saveConfigs,
    loadAllConfigs,
    genId,
    genCfgId,
  };
});