/* =====================================================================
 * 好友模块（friend.js）
 * 好友申请 / 状态展示 / 博主审批弹窗。
 * ===================================================================== */

import { state } from "./state.js";
import { escapeHtml, formatDate, openModal, showToast } from "./utils.js";
import { api } from "./api.js";
import { openLoginModal } from "./auth.js";
import { renderAuthArea } from "./router.js";

export async function applyFriend() {
  if (!state.user) { openLoginModal(); showToast("请先登录后再申请好友", "info"); return; }
  try {
    await api("/api/friend/apply", { method: "POST" });
    state.friendStatus = "pending";
    renderAuthArea();
    showToast("好友申请已提交，等待博主审批", "success");
  } catch (err) {
    showToast(err.message, "error");
  }
}

// 记录当前打开的审批弹窗引用，避免重复打开时弹窗叠加
let manageModal = null;

export function openFriendManageModal() {
  // 先关闭上一次打开的审批弹窗
  if (manageModal) { try { manageModal.close(); } catch (e) { /* 忽略 */ } }
  const body = document.createElement("div");
  body.innerHTML = '<p class="muted">加载中…</p>';
  manageModal = openModal({ title: "好友申请管理", content: body });
  renderApplications(body);
}

export async function openFriendListModal() {
  const body = document.createElement("div");
  body.innerHTML = '<p class="muted">加载中…</p>';
  const modal = openModal({ title: "好友列表", content: body });
  try {
    const friends = await api("/api/friend/list");
    if (!friends.length) { body.innerHTML = '<p class="empty">还没有好友</p>'; return; }
    body.innerHTML = friends.map((f) => `
      <div class="friend-row">
        ${f.avatar ? `<img class="friend-avatar" src="${escapeHtml(f.avatar)}" alt="">` : '<span class="friend-avatar friend-avatar-empty"></span>'}
        <div class="friend-info">
          <strong>${escapeHtml(f.username)}</strong>
          <span class="muted">${escapeHtml(f.bio || `成为好友于 ${formatDate(f.friend_since)}`)}</span>
        </div>
      </div>`).join("");
  } catch (err) {
    body.innerHTML = "";
    showToast(err.message, "error");
  }
}

export async function renderApplications(body) {
  try {
    const records = await api("/api/friend/applications");
    if (!records.length) { body.innerHTML = '<p class="empty">暂无申请记录</p>'; return; }
    body.innerHTML = "";
    const STATUS_TEXT = { pending: "待审批", accepted: "已通过", rejected: "已拒绝" };
    for (const record of records) {
      const row = document.createElement("div");
      row.className = "app-row";
      const statusText = STATUS_TEXT[record.status] || record.status;
      row.innerHTML = `
        <span class="app-user">${escapeHtml(record.username || "未知用户")}</span>
        <span class="app-email muted">${escapeHtml(record.email || "")}</span>
        <span class="app-time muted">${formatDate(record.created_time)}</span>
        <span class="app-status">${statusText}</span>`;
      if (record.status === "pending") {
        const approveBtn = document.createElement("button");
        approveBtn.className = "btn btn-primary btn-sm"; approveBtn.textContent = "通过";
        approveBtn.addEventListener("click", async () => {
          try {
            await api(`/api/friend/${record.id}/approve`, { method: "POST" });
            showToast("已通过好友申请", "success");
            await renderApplications(body); // 原地刷新当前弹窗内容，不再叠加新弹窗
          } catch (err) { showToast(err.message, "error"); }
        });
        const rejectBtn = document.createElement("button");
        rejectBtn.className = "btn btn-outline btn-sm"; rejectBtn.textContent = "拒绝";
        rejectBtn.addEventListener("click", async () => {
          try {
            await api(`/api/friend/${record.id}/reject`, { method: "POST" });
            showToast("已拒绝好友申请");
            await renderApplications(body); // 原地刷新当前弹窗内容，不再叠加新弹窗
          } catch (err) { showToast(err.message, "error"); }
        });
        row.appendChild(approveBtn);
        row.appendChild(rejectBtn);
      }
      body.appendChild(row);
    }
  } catch (err) {
    body.innerHTML = "";
    showToast(err.message, "error");
  }
}