document.addEventListener("DOMContentLoaded", () => {
  console.log("trial-balance.js 已执行");

  const API_URL = "http://127.0.0.1:18080/trial-balance";

  // デフォルト期間を計算（5/31決算：6月開始～現在月末）
  function getDefaultPeriod() {
    const today = new Date();
    const currentYear = today.getFullYear();
    const currentMonth = today.getMonth() + 1; // 1-12

    let fiscalStartYear, fiscalEndYear;

    // 6月～5月が1会計年度
    if (currentMonth >= 6) {
      // 6月以降：当年6月1日から
      fiscalStartYear = currentYear;
      fiscalEndYear = currentYear;
    } else {
      // 1-5月：前年6月1日から
      fiscalStartYear = currentYear - 1;
      fiscalEndYear = currentYear;
    }

    const dateFrom = `${fiscalStartYear}-06-01`;

    // 現在月の末日を計算
    const lastDayOfMonth = new Date(fiscalEndYear, currentMonth, 0).getDate();
    const dateTo = `${fiscalEndYear}-${String(currentMonth).padStart(
      2,
      "0"
    )}-${String(lastDayOfMonth).padStart(2, "0")}`;

    return { dateFrom, dateTo };
  }

  // 試算表データを読み込む関数
  function loadTrialBalance(dateFrom, dateTo) {
    const url = `${API_URL}?date_from=${dateFrom}&date_to=${dateTo}`;
    console.log("読み込み URL:", url);

    fetch(url)
      .then((r) => {
        if (!r.ok) throw new Error("API 返回错误: " + r.status);
        return r.json();
      })
      .then((data) => {
        console.log("試算表 API データ:", data);

        // 期間情報を更新
        updatePeriodInfo(dateFrom, dateTo);

        const tbody = document.querySelector("#trialBalanceTable tbody");
        if (!tbody) {
          console.error("未找到 #trialBalanceTable tbody");
          return;
        }

        tbody.innerHTML = "";

        let totalOpening = 0;
        let totalDebit = 0;
        let totalCredit = 0;
        let totalClosing = 0;

        data.accounts.forEach((row) => {
          const debit = Number(row.debit ?? 0);
          const credit = Number(row.credit ?? 0);
          const opening = Number(row.opening_balance ?? 0);
          const closing = Number(row.closing_balance ?? 0);

          // =========================
          // 行タイプ判定
          // =========================
          const isTotalRow = !row.account_code; // null / "" / undefined 全覆盖

          // 明细行だけ合計に含める
          if (!isTotalRow) {
            totalOpening += opening;
            totalDebit += debit;
            totalCredit += credit;
            totalClosing += closing;
          }

          const tr = document.createElement("tr");

          if (isTotalRow) {
            tr.classList.add("total-row");
          }

          const ratio = row.ratio ?? "0.00";

          tr.innerHTML = `
          <td class="left">${row.account_code ?? ""}</td>
          <td class="left">${row.account_name ?? ""}</td>
          <td class="right">${opening ? opening.toLocaleString() : ""}</td>
          <td class="right">${debit ? debit.toLocaleString() : ""}</td>
          <td class="right">${credit ? credit.toLocaleString() : ""}</td>
          <td class="right">${closing ? closing.toLocaleString() : ""}</td>
          <td class="right">${ratio}</td>
        `;

          tbody.appendChild(tr);
        });

        // =========================
        // フッター合計
        // =========================
        document.getElementById("totalOpening").textContent =
          totalOpening.toLocaleString();
        document.getElementById("totalDebit").textContent =
          totalDebit.toLocaleString();
        document.getElementById("totalCredit").textContent =
          totalCredit.toLocaleString();
        document.getElementById("totalClosing").textContent =
          totalClosing.toLocaleString();
        document.getElementById("totalRatio").textContent =
          data.totals?.ratio ?? "100.00";
      })
      .catch((err) => {
        console.error("試算表読取失敗:", err);
        alert("試算表読取失敗、コンソールログを確認してください");
      });
  }

  // 期間情報を更新する関数
  function updatePeriodInfo(dateFrom, dateTo) {
    const fromDate = new Date(dateFrom);
    const toDate = new Date(dateTo);

    const fromYear = fromDate.getFullYear() - 2018; // 令和変換（2019年=令和1年）
    const toYear = toDate.getFullYear() - 2018;

    const periodText = `令和${fromYear}年 ${
      fromDate.getMonth() + 1
    }月 ${fromDate.getDate()}日 ～ 令和${toYear}年 ${
      toDate.getMonth() + 1
    }月 ${toDate.getDate()}日`;
    document.getElementById("periodInfo").textContent = periodText;
  }

  // 検索ボタンのイベント
  document.getElementById("btnSearch").addEventListener("click", () => {
    const dateFrom = document.getElementById("dateFrom").value;
    const dateTo = document.getElementById("dateTo").value;

    if (!dateFrom || !dateTo) {
      alert("開始年月日と終了年月日を入力してください");
      return;
    }

    if (dateFrom > dateTo) {
      alert("開始年月日は終了年月日より前の日付を指定してください");
      return;
    }

    loadTrialBalance(dateFrom, dateTo);
  });

  // 全年度表示ボタンのイベント
  document.getElementById("btnFullYear").addEventListener("click", () => {
    const currentYear = new Date().getFullYear();
    const dateFrom = `${currentYear}-01-01`;
    const dateTo = `${currentYear}-12-31`;

    document.getElementById("dateFrom").value = dateFrom;
    document.getElementById("dateTo").value = dateTo;

    loadTrialBalance(dateFrom, dateTo);
  });

  // 初期読み込み（5/31決算に対応）
  const defaultPeriod = getDefaultPeriod();
  document.getElementById("dateFrom").value = defaultPeriod.dateFrom;
  document.getElementById("dateTo").value = defaultPeriod.dateTo;

  loadTrialBalance(defaultPeriod.dateFrom, defaultPeriod.dateTo);
});