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<!doctype html>
<html lang="ja">
<meta charset="utf-8">
<title>かんたん請求書作成</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
  body{font-family:system-ui,-apple-system,"Noto Sans JP",sans-serif;margin:24px}
  h1{font-size:28px;margin-bottom:12px}
  .row{display:flex;gap:16px;flex-wrap:wrap}
  .card{border:1px solid #e5e7eb;border-radius:14px;padding:16px;flex:1;min-width:320px;background:#fff}
  label{display:block;font-size:12px;color:#374151;margin-top:8px}
  input,textarea{width:100%;padding:10px;border:1px solid #d1d5db;border-radius:8px}
  table{width:100%;border-collapse:collapse}
  th,td{border-bottom:1px solid #eee;padding:8px;text-align:left}
  .btn{padding:10px 14px;border-radius:8px;border:1px solid #0ea5e9;background:#0ea5e9;color:#fff;cursor:pointer}
  .btn.secondary{background:#fff;color:#0ea5e9}
  .muted{color:#6b7280;font-size:12px}
  .right{ text-align:right }
</style>
<body>
<h1>かんたん請求書作成</h1>
<div style="margin-bottom:10px">
  API Key <input id="apiKey" style="width:160px" placeholder="dev"> <button class="btn secondary" id="saveKey">保存</button>
  <span class="muted" style="margin-left:8px">※ /docs の Authorize と同じキーです(既定: dev)</span>
</div>

<div class="row">
  <div class="card" style="max-width:520px">
    <h3>顧客</h3>
    <label>既存顧客を検索</label>
    <input id="q" placeholder="社名・メール・電話">
    <div style="margin-top:6px"><button class="btn secondary" id="refresh">一覧更新</button></div>
    <div id="custErr" class="muted" style="margin-top:6px;color:#ef4444"></div>
    <div style="max-height:180px;overflow:auto;margin-top:6px;border:1px solid #eee;border-radius:8px">
      <table>
        <thead><tr><th>ID</th><th>社名</th><th>連絡先</th><th></th></tr></thead>
        <tbody id="custTb"></tbody>
      </table>
    </div>

    <div class="muted" style="margin-top:12px">新規作成する場合はこちらに入力</div>
    <label>会社名*</label><input id="c_name">
    <label>メール</label><input id="c_email">
    <label>電話</label><input id="c_phone">
    <label>住所</label><input id="c_addr">
    <div class="row">
      <div style="flex:1"><label>市区町村</label><input id="c_city"></div>
      <div style="flex:1"><label></label><input id="c_country" placeholder="JP"></div>
    </div>
    <div class="muted" style="margin-top:6px">※ 既存顧客をクリックすると上記 <code>customer_id</code> として選択されます。</div>
    <div id="chosen" class="muted" style="margin-top:6px">選択中の customer_id: <b id="cid">(未選択)</b></div>
  </div>

  <div class="card">
    <h3>明細</h3>
    <table>
      <thead><tr><th>内容</th><th class="right">数量</th><th class="right">単価</th><th class="right">税率</th><th></th></tr></thead>
      <tbody id="items"></tbody>
    </table>
    <div style="margin-top:6px"><button class="btn secondary" id="add">+ 行を追加</button></div>

    <div class="row" style="margin-top:16px">
      <div class="card" style="min-width:280px">
        <h4>請求情報</h4>
        <label>支払期日</label><input type="date" id="due">
        <label>備考</label><textarea id="notes" rows="4" placeholder="いつもお世話になっております…"></textarea>
        <div style="margin-top:10px;display:flex;gap:8px;flex-wrap:wrap">
          <button class="btn" id="btnCreate">一括で作成</button>
          <button class="btn secondary" id="btnAi">AI文面(件名+本文)</button>
        </div>
        <div id="msg" class="muted" style="margin-top:8px;color:#ef4444"></div>
      </div>

      <div class="card" style="min-width:260px">
        <h4>合計</h4>
        <div>小計 <span id="sub" class="right" style="float:right">0</span></div>
        <div>税額 <span id="tax" class="right" style="float:right">0</span></div>
        <div style="font-weight:700">合計 <span id="tot" class="right" style="float:right">0</span></div>
      </div>
    </div>

    <div class="muted" style="margin-top:8px">
      作成後:PDFダウンロードは <code>GET /invoices/{id}/pdf</code>、メール送信は <code>POST /invoices/{id}/email</code></div>
  </div>
</div>

<script>
const BASE = location.origin;
const LSKEY = "mini_invoice_api_key";

const apiKeyEl = document.getElementById('apiKey');
apiKeyEl.value = localStorage.getItem(LSKEY) || "dev";
document.getElementById('saveKey').onclick = () => {
  localStorage.setItem(LSKEY, apiKeyEl.value.trim());
  alert("API Key を保存しました");
  loadCustomers();
};

const headers = () => ({
  "Content-Type": "application/json",
  "X-API-Key": (localStorage.getItem(LSKEY) || "dev")
});

// 日付を ISO に整形
const fmtDate = (s) => {
  if (!s) return null;
  const t = String(s).trim().replace(/\//g,"-");
  const d = new Date(t);
  if (isNaN(d)) return null;
  return d.toISOString().slice(0,10);
};

let selectedCustomerId = null;
const cidEl = document.getElementById('cid');
const msgEl = document.getElementById('msg');

function rowItem(desc="", qty=1, price=0, tax=0.1){
  const tr = document.createElement('tr');
  tr.innerHTML = `
    <td><input class="d" value="${desc}"></td>
    <td class="right"><input class="q" type="number" step="0.01" value="${qty}" style="width:90px"></td>
    <td class="right"><input class="p" type="number" step="1" value="${price}" style="width:110px"></td>
    <td class="right"><input class="t" type="number" step="0.01" value="${tax}" style="width:90px"></td>
    <td><button class="btn secondary del">×</button></td>
  `;
  tr.querySelector('.del').onclick = () => { tr.remove(); recalc(); };
  return tr;
}

function recalc(){
  const rows = [...document.querySelectorAll('#items tr')];
  let sub = 0, tax = 0;
  rows.forEach(r=>{
    const q = parseFloat(r.querySelector('.q').value || 0);
    const p = parseFloat(r.querySelector('.p').value || 0);
    const t = parseFloat(r.querySelector('.t').value || 0);
    const line = q*p; sub += line; tax += line*t;
  });
  document.getElementById('sub').innerText = Math.round(sub).toLocaleString();
  document.getElementById('tax').innerText = Math.round(tax).toLocaleString();
  document.getElementById('tot').innerText = Math.round(sub+tax).toLocaleString();
}

document.getElementById('add').onclick = ()=>{
  const tr = rowItem("Webサイト制作一式", 1, 300000, 0.1);
  document.getElementById('items').append(tr);
  recalc();
};
document.getElementById('add').click(); // 初期1行

async function loadCustomers(){
  const q = document.getElementById('q').value.trim();
  const url = new URL(BASE + "/customers");
  if(q) url.searchParams.set("q", q);
  const res = await fetch(url, {headers:headers()});
  const tb = document.getElementById('custTb'); tb.innerHTML="";
  if(!res.ok){
    document.getElementById('custErr').innerText = "読み込みエラー: " + (await res.text());
    return;
  }
  document.getElementById('custErr').innerText = "";
  const js = await res.json();
  (js.data||[]).forEach(c=>{
    const tr = document.createElement('tr');
    tr.innerHTML = `<td>${c.id}</td><td>${c.name}</td><td>${[c.email,c.phone].filter(Boolean).join(" / ")}</td><td><button class="btn secondary">選択</button></td>`;
    tr.querySelector('button').onclick = ()=>{
      selectedCustomerId = c.id; cidEl.innerText = c.id;
      document.getElementById('c_name').value = c.name||"";
      document.getElementById('c_email').value = c.email||"";
      document.getElementById('c_phone').value = c.phone||"";
      document.getElementById('c_addr').value = c.address||"";
      document.getElementById('c_city').value = c.city||"";
      document.getElementById('c_country').value = c.country||"";
    };
    tb.append(tr);
  });
}
document.getElementById('refresh').onclick = loadCustomers;
loadCustomers();

// 一括作成
document.getElementById('btnCreate').onclick = async ()=>{
  msgEl.style.color = "#ef4444";
  const items = [...document.querySelectorAll('#items tr')].map(r=>({
    description: r.querySelector('.d').value,
    quantity: parseFloat(r.querySelector('.q').value||0),
    unit_price: parseFloat(r.querySelector('.p').value||0),
    tax_rate: parseFloat(r.querySelector('.t').value||0),
  }));
  const cust = selectedCustomerId ? {id:selectedCustomerId} : {
    name: document.getElementById('c_name').value||null,
    email: document.getElementById('c_email').value||null,
    phone: document.getElementById('c_phone').value||null,
    address: document.getElementById('c_addr').value||null,
    city: document.getElementById('c_city').value||null,
    country: document.getElementById('c_country').value||null,
  };
  const payload = {
    customer: cust,
    due_date: fmtDate(document.getElementById('due').value),
    notes: document.getElementById('notes').value || null,
    items
  };
  const res = await fetch(BASE + "/wizard/invoice", {
    method:"POST", headers: headers(), body: JSON.stringify(payload)
  });
  if(!res.ok){
    const t = await res.text();
    msgEl.innerText = "作成に失敗: " + t;
    return;
  }
  const js = await res.json();
  msgEl.style.color = "#16a34a";
  msgEl.innerText = `作成成功! invoice_id=${js.invoice_id} / 合計=${js.totals.total}`;
};

// AI 文面
document.getElementById('btnAi').onclick = async ()=>{
  msgEl.style.color = "#ef4444";
  const company_name = document.getElementById('c_name').value || "(社名)";
  const customer_name = company_name + " 御中";
  const items = [...document.querySelectorAll('#items tr')].map(r=>({
    description: r.querySelector('.d').value,
    quantity: parseFloat(r.querySelector('.q').value||0),
    unit_price: parseFloat(r.querySelector('.p').value||0),
    tax_rate: parseFloat(r.querySelector('.t').value||0),
  }));
  const due = fmtDate(document.getElementById('due').value);
  const res = await fetch(BASE + "/ai/generate-email", {
    method:"POST", headers: headers(),
    body: JSON.stringify({ kind:"invoice", company_name, customer_name, language:"ja", items, due_date: due, tone:"polite" })
  });
  if(!res.ok){ msgEl.innerText = "AI文面生成に失敗しました: " + await res.text(); return; }
  const js = await res.json();
  alert(js.email);
};
</script>
</body>
</html>