/**
 * 锁定 / 解锁界面与顶栏锁定按钮。
 * 解锁成功后通过 ctx 进入主界面（恢复草稿 + 渲染环境与配置列表）。
 */
import { t } from "../i18n.js";
import { sendMessage } from "../messaging.js";
import type { LockMode } from "../types.js";
import { $ } from "./dom";
import type { PopupCtx } from "./context";

const lockScreen = $("lockScreen");
const mainContainer = $("mainContainer");
const lockTitle = $("lockTitle");
const lockHint = $("lockHint");
const lockPassword = $("lockPassword");
const lockPasswordConfirm = $("lockPasswordConfirm");
const lockConfirmGroup = $("lockConfirmGroup");
const lockSubmitBtn = $("lockSubmitBtn");
const lockWarn = $("lockWarn");
const lockBtn = $("lockBtn");

export function initLock(ctx: PopupCtx) {
  let lockMode: LockMode = "setup"; // "setup" | "unlock"
  let lockAfterSetup = false;

  function showLockScreen(mode: LockMode): void {
    lockMode = mode;
    lockScreen.style.display = "flex";
    mainContainer.style.display = "none";
    lockPassword.value = "";
    lockPasswordConfirm.value = "";
    lockWarn.textContent = "";
    lockWarn.style.display = "none";

    if (mode === "setup") {
      lockTitle.textContent = t("lockSetupTitle");
      lockHint.textContent = t("lockSetupHint");
      lockConfirmGroup.style.display = "block";
      lockSubmitBtn.textContent = t("lockSetupBtn");
    } else {
      lockTitle.textContent = t("lockUnlockTitle");
      lockHint.textContent = t("lockUnlockHint");
      lockConfirmGroup.style.display = "none";
      lockSubmitBtn.textContent = t("lockUnlockBtn");
    }
    setTimeout(() => lockPassword.focus(), 50);
  }

  function showMainUI() {
    lockScreen.style.display = "none";
    mainContainer.style.display = "flex";
  }

  async function enterMain() {
    showMainUI();
    await ctx.loadDraft();
    await ctx.renderEnvSelect();
    await ctx.renderConfigList();
  }

  async function initLockState() {
    try {
      const resp = await sendMessage({ action: "getVaultStatus" });
      lockBtn.hidden = false;
      if (!(resp as any).hasVault) {
        // 无 vault：明文模式，直接进入，不锁定
        await enterMain();
      } else if (!(resp as any).unlocked) {
        showLockScreen("unlock");
      } else {
        await enterMain();
      }
    } catch (err) {
      console.warn("[AutoLogin]", t("logGetLockStatusFail"), err);
      lockBtn.hidden = false;
      await enterMain();
    }
  }

  lockSubmitBtn.addEventListener("click", async () => {
    const pwd = lockPassword.value;
    if (!pwd) {
      lockWarn.textContent = t("lockWarnEmpty");
      lockWarn.style.display = "block";
      return;
    }
    if (lockMode === "setup") {
      if (pwd.length < 6) {
        lockWarn.textContent = t("lockWarnShort");
        lockWarn.style.display = "block";
        return;
      }
      if (pwd !== lockPasswordConfirm.value) {
        lockWarn.textContent = t("lockWarnMismatch");
        lockWarn.style.display = "block";
        return;
      }
      try {
        await sendMessage({ action: "setupVault", password: pwd });
        ctx.showToast(t("toastPasswordSet"));
        if (lockAfterSetup) {
          lockAfterSetup = false;
          await sendMessage({ action: "lock" });
          showLockScreen("unlock");
          ctx.showToast(t("toastLocked"));
        } else {
          await enterMain();
        }
      } catch (err) {
        lockWarn.textContent = t("lockWarnSetupFail", (err as Error).message || String(err));
        lockWarn.style.display = "block";
      }
    } else {
      try {
        const resp = await sendMessage({ action: "unlock", password: pwd });
        if ((resp as any).success) {
          ctx.showToast(t("toastUnlocked"));
          await enterMain();
        } else {
          lockWarn.textContent = (resp as any).error || t("lockWarnUnlockFail", "");
          lockWarn.style.display = "block";
        }
      } catch (err) {
        lockWarn.textContent = t("lockWarnUnlockFail", (err as Error).message || String(err));
        lockWarn.style.display = "block";
      }
    }
  });

  lockPassword.addEventListener("keydown", (e: KeyboardEvent) => {
    if (e.key === "Enter") lockSubmitBtn.click();
  });
  lockPasswordConfirm.addEventListener("keydown", (e: KeyboardEvent) => {
    if (e.key === "Enter") lockSubmitBtn.click();
  });

  lockBtn.addEventListener("click", async () => {
    const resp = await sendMessage({ action: "getVaultStatus" }).catch(() => null);
    if (resp && !(resp as any).hasVault) {
      // 明文模式：先设密码再锁定
      lockAfterSetup = true;
      showLockScreen("setup");
      return;
    }
    if (!confirm(t("lockConfirmPrompt"))) return;
    await sendMessage({ action: "lock" });
    showLockScreen("unlock");
    ctx.showToast(t("toastLocked"));
  });

  // 弹窗内的点击视为用户活动，重置 background 自动锁定计时
  document.addEventListener("click", () => {
    if (lockScreen.style.display === "none") {
      sendMessage({ action: "ping" }, 1).catch(() => {});
    }
  });

  return { initLockState };
}