/**
 * 添加配置表单：表单字段、草稿持久化（弹窗关闭后不丢失）、
 * 添加按钮提交、"填入当前域名"按钮。
 */
import { t } from "../i18n.js";
import { resolveAlias } from "../ui-utils.js";
import type { DomainConfig } from "../types.js";
import { $ } from "./dom";
import type { PopupCtx } from "./context";

const domainInput = $("domain");
const aliasInput = $("alias");
const usernameInput = $("username");
const passwordInput = $("password");
const autoSubmitSelect = $("autoSubmit");
const enabledCheckbox = $("enabled");
const delayMsInput = $("delayMs");
const usernameSelectorInput = $("usernameSelector");
const passwordSelectorInput = $("passwordSelector");
const submitSelectorInput = $("submitSelector");
const addBtn = $("addBtn");
const fillDomainBtn = $("fillDomain");

const DRAFT_KEY = "formDraft";

const draftFields = [
  domainInput,
  aliasInput,
  usernameInput,
  passwordInput,
  autoSubmitSelect,
  usernameSelectorInput,
  passwordSelectorInput,
  submitSelectorInput,
  enabledCheckbox,
  delayMsInput,
];

export function initConfigForm(ctx: PopupCtx) {
  function saveDraft() {
    const draft = {
      domain: domainInput.value,
      alias: aliasInput.value,
      username: usernameInput.value,
      password: passwordInput.value,
      autoSubmit: autoSubmitSelect.value,
      usernameSelector: usernameSelectorInput.value,
      passwordSelector: passwordSelectorInput.value,
      submitSelector: submitSelectorInput.value,
      enabled: enabledCheckbox.checked,
      delayMs: delayMsInput.value,
    };
    chrome.storage.local.set({ [DRAFT_KEY]: draft });
  }

  async function loadDraft() {
    const data = await chrome.storage.local.get(DRAFT_KEY);
    const draft = data[DRAFT_KEY];
    if (!draft) return;
    domainInput.value = draft.domain || "";
    aliasInput.value = draft.alias || "";
    usernameInput.value = draft.username || "";
    passwordInput.value = draft.password || "";
    autoSubmitSelect.value = draft.autoSubmit || "true";
    usernameSelectorInput.value = draft.usernameSelector || "";
    passwordSelectorInput.value = draft.passwordSelector || "";
    submitSelectorInput.value = draft.submitSelector || "";
    enabledCheckbox.checked = draft.enabled !== false;
    delayMsInput.value = draft.delayMs || "";
    addBtn.textContent = t("addConfigBtn");
  }

  function clearDraft() {
    chrome.storage.local.remove(DRAFT_KEY);
  }

  function resetForm() {
    domainInput.value = "";
    aliasInput.value = "";
    usernameInput.value = "";
    passwordInput.value = "";
    autoSubmitSelect.value = "true";
    usernameSelectorInput.value = "";
    passwordSelectorInput.value = "";
    submitSelectorInput.value = "";
    enabledCheckbox.checked = true;
    delayMsInput.value = "";
    addBtn.textContent = t("addConfigBtn");
    clearDraft();
  }

  // 表单内容实时存入草稿，弹窗关闭后不丢失
  draftFields.forEach((el) => {
    el.addEventListener("input", saveDraft);
    el.addEventListener("change", saveDraft);
  });

  addBtn.addEventListener("click", async () => {
    const domain = domainInput.value.trim();
    const username = usernameInput.value.trim();
    const password = passwordInput.value;

    if (!domain || !username || !password) {
      ctx.showToast(t("toastRequired"));
      return;
    }

    // 申请站点访问权限必须紧跟用户手势，因此放在其它 await 之前
    const authorized = await Perms.requestForDomain(domain);

    const config: DomainConfig = {
      id: EnvStore.genCfgId(),
      domain,
      alias: aliasInput.value.trim() || (await resolveAlias(domain)) || null,
      username,
      password,
      autoSubmit: autoSubmitSelect.value === "true",
      usernameSelector: usernameSelectorInput.value.trim() || null,
      passwordSelector: passwordSelectorInput.value.trim() || null,
      submitSelector: submitSelectorInput.value.trim() || null,
      enabled: enabledCheckbox.checked,
      delayMs: delayMsInput.value ? Number(delayMsInput.value) : null,
    };

    const configs = await EnvStore.loadConfigs();

    configs.push(config);
    ctx.showToast(authorized ? t("toastAdded") : t("toastUnauthorized"));

    await EnvStore.saveConfigs(configs);
    resetForm();
    ctx.renderConfigList();
    ctx.renderEnvSelect();
    ctx.refreshEnvManage();
  });

  // 填入当前标签页域名
  fillDomainBtn.addEventListener("click", async () => {
    const [tab] = await chrome.tabs.query({ active: true, currentWindow: true });
    if (!tab) {
      ctx.showToast(t("toastNoTab"));
      return;
    }
    if (!tab.url) {
      // 未授权时读不到地址：提示用户点扩展图标重新授予 activeTab
      ctx.showToast(t("toastNoTabUrl"));
      return;
    }
    try {
      const u = new URL(tab.url);
      const host = u.host;
      if (!host) {
        ctx.showToast(t("toastNoDomain"));
        return;
      }
      const value = u.pathname && u.pathname !== "/" ? host + u.pathname : host;
      domainInput.value = value;
      if (tab.title) aliasInput.value = tab.title;
      saveDraft();
      ctx.showToast(t("toastDomainFilled", value));
    } catch {
      ctx.showToast(t("toastUrlParseFail"));
    }
  });

  return { resetForm, saveDraft, loadDraft };
}