/**
 * CompBase attendance: scan missing clock-out (應刷未刷) and auto-fill via RID page.
 */

function setActionStatus(text, ok) {
  const el = document.getElementById("actionStatus");
  if (!el) return;
  el.textContent = text || "";
  el.className = "settings-status" + (ok === true ? " ok" : ok === false ? " err" : "");
}

function escapeHtml(text) {
  return String(text)
    .replace(/&/g, "&")
    .replace(/</g, "&lt;")
    .replace(/>/g, "&gt;")
    .replace(/"/g, "&quot;");
}

function getDays() {
  const n = Number(document.getElementById("days")?.value || 14);
  if (!Number.isFinite(n) || n < 1) return 14;
  return Math.min(62, Math.floor(n));
}

function getOutTimeMode() {
  return document.getElementById("outTimeMode")?.value || "expected";
}

function isDryRun() {
  return Boolean(document.getElementById("dryRun")?.checked);
}

async function refreshConn() {
  const line = document.getElementById("connLine");
  try {
    const data = await api("/api/compbase/status");
    if (data.default_days && document.getElementById("days")) {
      document.getElementById("days").value = data.default_days;
    }
    if (data.out_time_mode && document.getElementById("outTimeMode")) {
      document.getElementById("outTimeMode").value = data.out_time_mode;
    }
    if (!line) return;
    if (!data.has_credentials) {
      line.textContent = "未設定帳密（請到設定登入 PTS，或填 CompBase 帳密）";
      return;
    }
    const name = data.display_name || data.username || "—";
    const emp = data.emp_id ? ` · ${data.emp_id}` : "";
    const src = data.credential_source === "compbase" ? "CompBase 帳密" : "PTS 帳密";
    line.textContent = data.connected
      ? `CompBase ✓ · ${name}${emp} · ${src}`
      : `CompBase ✗ · ${data.error || "連線失敗"} · ${src}`;
  } catch (err) {
    if (line) line.textContent = err.message;
  }
}

function rowStatusLabel(row, kind) {
  if (kind === "filled") {
    if (row.dry_run) return `試跑 · 將送 ${escapeHtml(row.chosen_out_time || "—")}`;
    return `已送出 · ${escapeHtml(row.chosen_out_time || "—")}${row.message ? " · " + escapeHtml(row.message) : ""}`;
  }
  if (kind === "error") {
    return `失敗 · ${escapeHtml(row.error || row.message || "unknown")}`;
  }
  const reason = row.reason || row.status || "skipped";
  const map = {
    no_rid: "無 RID（可能缺刷進）",
    missing_in: "缺刷進",
    missing_out: "缺刷退但無連結",
    other: "其他異常",
  };
  return map[reason] || escapeHtml(String(reason));
}

function renderResults(data, mode) {
  const root = document.getElementById("resultView");
  if (!root) return;

  const filled = data.filled || data.fillable || [];
  const skipped = data.skipped || [];
  const errors = data.errors || [];
  const isScan = mode === "scan";

  const summaryParts = [
    `區間 ${escapeHtml(data.start || "—")} → ${escapeHtml(data.end || "—")}`,
    isScan
      ? `可補 ${data.fillable_count ?? filled.length}`
      : `完成 ${data.filled_count ?? filled.length}`,
    `略過 ${data.skipped_count ?? skipped.length}`,
  ];
  if (!isScan) {
    summaryParts.push(`失敗 ${data.error_count ?? errors.length}`);
    if (data.dry_run) summaryParts.push("試跑");
  }

  const blocks = [];
  blocks.push(`<p class="muted-inline">${summaryParts.join(" · ")}</p>`);

  function table(title, rows, kind) {
    if (!rows.length) return "";
    const body = rows
      .map((r) => {
        return `<tr>
          <td>${escapeHtml(r.date || "—")}</td>
          <td><code>${escapeHtml(r.rid || "—")}</code></td>
          <td>${escapeHtml(r.actual_in || r.in_time || "—")}</td>
          <td>${escapeHtml(r.exp_out || "—")}</td>
          <td>${rowStatusLabel(r, kind)}</td>
        </tr>`;
      })
      .join("");
    return `<div class="plan-day">
      <div class="plan-day-head"><strong>${escapeHtml(title)}</strong><span class="muted-inline">${rows.length}</span></div>
      <div class="table-wrap">
        <table class="data-table">
          <thead><tr><th>日期</th><th>RID</th><th>刷進</th><th>應下班</th><th>狀態</th></tr></thead>
          <tbody>${body}</tbody>
        </table>
      </div>
    </div>`;
  }

  if (isScan) {
    blocks.push(table("可補填（有 RID）", filled, "filled"));
    blocks.push(table("略過", skipped, "skipped"));
  } else {
    blocks.push(table(data.dry_run ? "試跑將送出" : "已送出", filled, "filled"));
    blocks.push(table("略過", skipped, "skipped"));
    blocks.push(table("失敗", errors, "error"));
  }

  if (blocks.length === 1) {
    blocks.push(`<p class="hint">近 ${escapeHtml(String(data.days || ""))} 天沒有可處理的漏刷退。</p>`);
  }

  root.innerHTML = blocks.join("");
}

async function runScan() {
  const days = getDays();
  setActionStatus(`掃描近 ${days} 天…`);
  try {
    const data = await api("/api/compbase/scan", {
      method: "POST",
      body: JSON.stringify({ days }),
    });
    renderResults(data, "scan");
    setActionStatus(
      `掃描完成：可補 ${data.fillable_count ?? 0}、略過 ${data.skipped_count ?? 0}`,
      true
    );
  } catch (err) {
    setActionStatus(err.message, false);
  }
}

async function runFill() {
  const days = getDays();
  const dryRun = isDryRun();
  const outTimeMode = getOutTimeMode();
  if (!dryRun) {
    const ok = window.confirm(
      `將對近 ${days} 天的「應刷未刷」送出刷退補填到 CompBase。\n確定繼續？`
    );
    if (!ok) return;
  }
  setActionStatus(dryRun ? `試跑近 ${days} 天…` : `補填近 ${days} 天…`);
  try {
    const data = await api("/api/compbase/fill", {
      method: "POST",
      body: JSON.stringify({
        days,
        dry_run: dryRun,
        out_time_mode: outTimeMode,
      }),
    });
    renderResults(data, "fill");
    const ok = (data.error_count ?? 0) === 0;
    setActionStatus(
      `${dryRun ? "試跑" : "補填"}完成：成功 ${data.filled_count ?? 0}、略過 ${data.skipped_count ?? 0}、失敗 ${data.error_count ?? 0}`,
      ok
    );
  } catch (err) {
    setActionStatus(err.message, false);
  }
}

function init() {
  document.getElementById("scanBtn")?.addEventListener("click", runScan);
  document.getElementById("fillBtn")?.addEventListener("click", runFill);
  refreshConn();
}

if (document.readyState === "loading") {
  document.addEventListener("DOMContentLoaded", init);
} else {
  init();
}