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mailer.py

@@ -0,0 +1,38 @@
+# mailer.py
+import os
+import smtplib
+from email.message import EmailMessage
+from typing import Optional
+
+def send_email_smtp(to: str, subject: str, body: str, attachment_path: Optional[str] = None):
+    host = os.getenv("SMTP_HOST")
+    port = int(os.getenv("SMTP_PORT", "587"))
+    user = os.getenv("SMTP_USER")
+    password = os.getenv("SMTP_PASS")
+    sender = os.getenv("SMTP_FROM", user or "no-reply@example.com")
+    use_tls = os.getenv("SMTP_USE_TLS", "1") == "1"
+
+    if not host or not user or not password:
+        # 環境未設定なら NOOP（成功扱いにして詳細メッセージを返す）
+        return True, "SMTP not configured; skipped sending (set SMTP_HOST/SMTP_PORT/SMTP_USER/SMTP_PASS/SMTP_FROM)"
+
+    msg = EmailMessage()
+    msg["From"] = sender
+    msg["To"] = to
+    msg["Subject"] = subject
+    msg.set_content(body)
+
+    if attachment_path:
+        with open(attachment_path, "rb") as f:
+            data = f.read()
+        msg.add_attachment(data, maintype="application", subtype="pdf", filename=os.path.basename(attachment_path))
+
+    try:
+        with smtplib.SMTP(host, port) as server:
+            if use_tls:
+                server.starttls()
+            server.login(user, password)
+            server.send_message(msg)
+        return True, "sent"
+    except Exception as e:
+        return False, f"send failed: {e}"

main.py

@@ -13,6 +13,8 @@ import pathlib
 from fastapi import FastAPI, Depends, HTTPException, Header, Query
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.openapi.utils import get_openapi
+from fastapi.responses import FileResponse
+from fastapi.staticfiles import StaticFiles
 from pydantic import BaseModel
 from sqlmodel import Field as SQLField, Session, SQLModel, create_engine, select, Relationship
 
@@ -36,7 +38,6 @@ def _ensure_dir(path: str) -> bool:
         return False
 
 def _make_sqlite_url(db_path: str) -> str:
-    # 絶対パス想定
     return f"sqlite:///{db_path}"
 
 DB_URL = os.getenv("DATABASE_URL")
@@ -64,7 +65,6 @@ engine = create_engine(
     connect_args={"check_same_thread": False} if DB_URL.startswith("sqlite") else {}
 )
 
-# セッション依存性（※ これが routes より前に必要）
 def get_session():
     with Session(engine) as session:
         yield session
@@ -122,6 +122,11 @@ class Invoice(SQLModel, table=True):
     due_date: Optional[date] = None
     notes: Optional[str] = None
 
+    # 入金関連（任意）
+    paid_at: Optional[datetime] = None
+    paid_amount: Optional[float] = None
+    payment_method: Optional[str] = None
+
     customer: Optional[Customer] = Relationship(back_populates="invoices")
     items: List["InvoiceItem"] = Relationship(back_populates="invoice")
 
@@ -136,6 +141,44 @@ class InvoiceItem(SQLModel, table=True):
 
     invoice: Optional[Invoice] = Relationship(back_populates="items")
 
+# --------------------------
+# DTO（入力用）
+# --------------------------
+class CreateQuoteIn(BaseModel):
+    customer_id: int
+    valid_until: Optional[date] = None
+    notes: Optional[str] = None
+
+class QuoteItemIn(BaseModel):
+    description: str
+    quantity: float = 1
+    unit_price: float
+    tax_rate: float = 0.0
+
+class CreateInvoiceIn(BaseModel):
+    customer_id: int
+    due_date: Optional[date] = None
+    notes: Optional[str] = None
+    # 追加：見積→請求のコピー用
+    quote_id: Optional[int] = None
+
+class InvoiceItemIn(BaseModel):
+    description: str
+    quantity: float = 1
+    unit_price: float
+    tax_rate: float = 0.0
+
+class PayIn(BaseModel):
+    paid_amount: float
+    paid_at: Optional[datetime] = None
+    payment_method: Optional[str] = "bank_transfer"
+
+class EmailIn(BaseModel):
+    to: str
+    subject: str
+    body: str
+    attach_pdf: bool = True
+
 # --------------------------
 # Totals（堅牢化）
 # --------------------------
@@ -148,7 +191,6 @@ def round2(v: float) -> float:
     return float(f"{v:.2f}")
 
 def _get(v: Any, key: str, default=0.0):
-    # モデルでも dict でもOKにする
     if isinstance(v, dict):
         return v.get(key, default)
     return getattr(v, key, default)
@@ -175,7 +217,7 @@ app.add_middleware(
     allow_methods=["*"], allow_headers=["*"],
 )
 
-# --- Swagger UI に Authorize（X-API-Key）を出すための OpenAPI セキュリティ設定 ---
+# Swagger の Authorize（X-API-Key）を出す
 def custom_openapi():
     if app.openapi_schema:
         return app.openapi_schema
@@ -191,7 +233,6 @@ def custom_openapi():
         "name": "X-API-Key",
         "in": "header",
     }
-    # 全エンドポイントにデフォルトで適用
     for path in openapi_schema.get("paths", {}).values():
         for method in path.values():
             method.setdefault("security", [{"APIKeyHeader": []}])
@@ -204,6 +245,9 @@ app.openapi = custom_openapi
 def on_startup():
     SQLModel.metadata.create_all(engine)
 
+# ---- UI（/app） ----
+app.mount("/app", StaticFiles(directory="static", html=True), name="app")
+
 # -------- Customers --------
 @app.post("/customers", dependencies=[Depends(require_api_key)])
 def create_customer(payload: Customer, session: Session = Depends(get_session)):
@@ -212,15 +256,24 @@ def create_customer(payload: Customer, session: Session = Depends(get_session)):
 
 @app.get("/customers", dependencies=[Depends(require_api_key)])
 def list_customers(
+    q: Optional[str] = Query(default=None, description="free text search (name/email/phone)"),
     limit: int = Query(50, ge=1, le=200),
     offset: int = Query(0, ge=0),
     session: Session = Depends(get_session),
 ):
-    rows = session.exec(select(Customer).offset(offset).limit(limit)).all()
-    total = session.exec(select(Customer)).count()
+    stmt = select(Customer)
+    if q:
+        like = f"%{q}%"
+        stmt = stmt.where(
+            (Customer.name.ilike(like)) |
+            (Customer.email.ilike(like)) |
+            (Customer.phone.ilike(like))
+        )
+    total = session.exec(stmt).count()
+    rows = session.exec(stmt.offset(offset).limit(limit)).all()
     return {"data": rows, "pagination": {"total": total, "limit": limit, "offset": offset}}
 
-# -------- Products --------
+# -------- Products（必要ならUIから追加） --------
 @app.post("/products", dependencies=[Depends(require_api_key)])
 def create_product(payload: Product, session: Session = Depends(get_session)):
     session.add(payload); session.commit(); session.refresh(payload)
@@ -238,11 +291,12 @@ def list_products(
 
 # -------- Quotes --------
 @app.post("/quotes", dependencies=[Depends(require_api_key)])
-def create_quote(payload: Quote, session: Session = Depends(get_session)):
+def create_quote(payload: CreateQuoteIn, session: Session = Depends(get_session)):
     if not session.get(Customer, payload.customer_id):
         raise HTTPException(400, "Customer not found")
-    session.add(payload); session.commit(); session.refresh(payload)
-    return payload
+    q = Quote(customer_id=payload.customer_id, valid_until=payload.valid_until, notes=payload.notes)
+    session.add(q); session.commit(); session.refresh(q)
+    return q
 
 @app.get("/quotes/{quote_id}", dependencies=[Depends(require_api_key)])
 def get_quote(quote_id: int, session: Session = Depends(get_session)):
@@ -250,24 +304,52 @@ def get_quote(quote_id: int, session: Session = Depends(get_session)):
     if not q:
         raise HTTPException(404, "Quote not found")
     items = session.exec(select(QuoteItem).where(QuoteItem.quote_id == quote_id)).all()
-    totals = compute_totals(items)  # dict化せず、そのまま渡す
+    totals = compute_totals(items)
     return {"quote": q, "items": items, "totals": totals}
 
 @app.post("/quotes/{quote_id}/items", dependencies=[Depends(require_api_key)])
-def add_quote_item(quote_id: int, payload: QuoteItem, session: Session = Depends(get_session)):
+def add_quote_item(quote_id: int, payload: QuoteItemIn, session: Session = Depends(get_session)):
     if not session.get(Quote, quote_id):
         raise HTTPException(404, "Quote not found")
-    payload.quote_id = quote_id
-    session.add(payload); session.commit(); session.refresh(payload)
-    return payload
+    item = QuoteItem(
+        quote_id=quote_id,
+        description=payload.description,
+        quantity=payload.quantity,
+        unit_price=payload.unit_price,
+        tax_rate=payload.tax_rate,
+    )
+    session.add(item); session.commit(); session.refresh(item)
+    return item
 
 # -------- Invoices --------
 @app.post("/invoices", dependencies=[Depends(require_api_key)])
-def create_invoice(payload: Invoice, session: Session = Depends(get_session)):
+def create_invoice(payload: CreateInvoiceIn, session: Session = Depends(get_session)):
+    # 見積→請求のコピーにも対応（quote_id を受け付ける）
     if not session.get(Customer, payload.customer_id):
         raise HTTPException(400, "Customer not found")
-    session.add(payload); session.commit(); session.refresh(payload)
-    return payload
+
+    inv = Invoice(customer_id=payload.customer_id, due_date=payload.due_date, notes=payload.notes)
+    session.add(inv); session.commit(); session.refresh(inv)
+
+    if payload.quote_id:
+        q = session.get(Quote, payload.quote_id)
+        if not q:
+            raise HTTPException(404, "Quote not found to copy")
+        q_items = session.exec(select(QuoteItem).where(QuoteItem.quote_id == payload.quote_id)).all()
+        for it in q_items:
+            new_item = InvoiceItem(
+                invoice_id=inv.id,
+                product_id=it.product_id,
+                description=it.description,
+                quantity=it.quantity,
+                unit_price=it.unit_price,
+                tax_rate=it.tax_rate,
+            )
+            session.add(new_item)
+        session.commit()
+
+    session.refresh(inv)
+    return inv
 
 @app.get("/invoices/{invoice_id}", dependencies=[Depends(require_api_key)])
 def get_invoice(invoice_id: int, session: Session = Depends(get_session)):
@@ -279,17 +361,77 @@ def get_invoice(invoice_id: int, session: Session = Depends(get_session)):
     return {"invoice": inv, "items": items, "totals": totals}
 
 @app.post("/invoices/{invoice_id}/items", dependencies=[Depends(require_api_key)])
-def add_invoice_item(invoice_id: int, payload: InvoiceItem, session: Session = Depends(get_session)):
+def add_invoice_item(invoice_id: int, payload: InvoiceItemIn, session: Session = Depends(get_session)):
     if not session.get(Invoice, invoice_id):
         raise HTTPException(404, "Invoice not found")
-    payload.invoice_id = invoice_id
-    session.add(payload); session.commit(); session.refresh(payload)
-    return payload
+    item = InvoiceItem(
+        invoice_id=invoice_id,
+        description=payload.description,
+        quantity=payload.quantity,
+        unit_price=payload.unit_price,
+        tax_rate=payload.tax_rate,
+    )
+    session.add(item); session.commit(); session.refresh(item)
+    return item
+
+# ---- 支払い登録 ----
+@app.post("/invoices/{invoice_id}/pay", dependencies=[Depends(require_api_key)])
+def pay_invoice(invoice_id: int, payload: PayIn, session: Session = Depends(get_session)):
+    inv = session.get(Invoice, invoice_id)
+    if not inv:
+        raise HTTPException(404, "Invoice not found")
+    inv.paid_amount = payload.paid_amount
+    inv.paid_at = payload.paid_at or datetime.utcnow()
+    inv.payment_method = payload.payment_method
+    inv.status = "paid"
+    session.add(inv); session.commit(); session.refresh(inv)
+    return {"ok": True, "invoice": inv}
+
+# ---- PDF生成＆ダウンロード ----
+@app.get("/invoices/{invoice_id}/pdf", dependencies=[Depends(require_api_key)])
+def invoice_pdf(invoice_id: int, session: Session = Depends(get_session)):
+    inv = session.get(Invoice, invoice_id)
+    if not inv:
+        raise HTTPException(404, "Invoice not found")
+    cust = session.get(Customer, inv.customer_id)
+    items = session.exec(select(InvoiceItem).where(InvoiceItem.invoice_id == invoice_id)).all()
+
+    from pdf_export import write_invoice_pdf  # 遅延import
+    out_path = f"/tmp/invoice_{invoice_id}.pdf"
+    totals = compute_totals(items)
+    write_invoice_pdf(out_path, inv, items, cust, totals)
+    return FileResponse(out_path, media_type="application/pdf", filename=f"invoice_{invoice_id}.pdf")
+
+# ---- メール送信（PDF添付可）----
+@app.post("/invoices/{invoice_id}/email", dependencies=[Depends(require_api_key)])
+def email_invoice(invoice_id: int, payload: EmailIn, session: Session = Depends(get_session)):
+    inv = session.get(Invoice, invoice_id)
+    if not inv:
+        raise HTTPException(404, "Invoice not found")
+    cust = session.get(Customer, inv.customer_id)
+    items = session.exec(select(InvoiceItem).where(InvoiceItem.invoice_id == invoice_id)).all()
+    totals = compute_totals(items)
+
+    attachment_path = None
+    if payload.attach_pdf:
+        from pdf_export import write_invoice_pdf
+        attachment_path = f"/tmp/invoice_{invoice_id}.pdf"
+        write_invoice_pdf(attachment_path, inv, items, cust, totals)
+
+    from mailer import send_email_smtp
+    ok, detail = send_email_smtp(
+        to=payload.to,
+        subject=payload.subject,
+        body=payload.body,
+        attachment_path=attachment_path
+    )
+    return {"ok": ok, "detail": detail}
 
 @app.get("/")
 def root():
     return {"ok": True, "app": "mini-invoice-saas", "docs": "/docs"}
 
-# -------- ChatGPT router を最後に組み込む（app 定義後） --------
+# -------- ChatGPT router を最後に組み込む --------
 from openai_integration import router as ai_router
 app.include_router(ai_router, prefix="/ai", tags=["ai"])
+

pdf_export.py

@@ -0,0 +1,81 @@
+# pdf_export.py
+from reportlab.lib.pagesizes import A4
+from reportlab.lib.units import mm
+from reportlab.lib import colors
+from reportlab.pdfgen import canvas
+from reportlab.platypus import Table, TableStyle, SimpleDocTemplate, Paragraph, Spacer
+from reportlab.lib.styles import getSampleStyleSheet
+
+def write_invoice_pdf(path, invoice, items, customer, totals):
+    doc = SimpleDocTemplate(path, pagesize=A4,
+                            rightMargin=20*mm, leftMargin=20*mm,
+                            topMargin=20*mm, bottomMargin=20*mm)
+    styles = getSampleStyleSheet()
+    story = []
+
+    title = "請求書" if invoice.status != "draft" else "請求書（下書き）"
+    story.append(Paragraph(title, styles["Title"]))
+    story.append(Spacer(1, 6))
+
+    # ヘッダ情報
+    header = [
+        ["請求書番号", str(invoice.id)],
+        ["発行日", str(invoice.issue_date)],
+        ["支払期日", str(invoice.due_date or "記載なし")],
+        ["ステータス", invoice.status],
+    ]
+    t = Table(header, colWidths=[30*mm, 120*mm])
+    t.setStyle(TableStyle([("BOX", (0,0), (-1,-1), 0.25, colors.black),
+                           ("BACKGROUND", (0,0), (0,-1), colors.whitesmoke),
+                           ("VALIGN",(0,0),(-1,-1),"MIDDLE")]))
+    story.append(t)
+    story.append(Spacer(1, 8))
+
+    # 請求先
+    to_table = [
+        ["請求先", customer.name if customer else f"Customer #{invoice.customer_id}"],
+        ["住所", (customer.address or "") if customer else ""],
+        ["メール", (customer.email or "") if customer else ""],
+    ]
+    tt = Table(to_table, colWidths=[30*mm, 120*mm])
+    tt.setStyle(TableStyle([("BOX", (0,0), (-1,-1), 0.25, colors.black),
+                            ("BACKGROUND", (0,0), (0,-1), colors.whitesmoke)]))
+    story.append(tt)
+    story.append(Spacer(1, 8))
+
+    # 明細
+    data = [["内容", "数量", "単価", "税率", "金額"]]
+    for it in items:
+        line = it.quantity * it.unit_price
+        data.append([it.description, f"{it.quantity}", f"{it.unit_price:.2f}", f"{it.tax_rate*100:.0f}%", f"{line:.2f}"])
+
+    tbl = Table(data, colWidths=[70*mm, 20*mm, 25*mm, 20*mm, 35*mm])
+    tbl.setStyle(TableStyle([
+        ("GRID", (0,0), (-1,-1), 0.25, colors.black),
+        ("BACKGROUND", (0,0), (-1,0), colors.lightgrey),
+        ("ALIGN", (1,1), (-1,-1), "RIGHT"),
+        ("ALIGN", (0,0), (0,-1), "LEFT"),
+    ]))
+    story.append(tbl)
+    story.append(Spacer(1, 8))
+
+    # 合計
+    sum_table = [
+        ["小計", f"{totals.subtotal:.2f}"],
+        ["税額", f"{totals.tax:.2f}"],
+        ["合計", f"{totals.total:.2f}"],
+    ]
+    st = Table(sum_table, colWidths=[40*mm, 35*mm])
+    st.setStyle(TableStyle([
+        ("GRID", (0,0), (-1,-1), 0.25, colors.black),
+        ("BACKGROUND", (0,2), (-1,2), colors.yellow),
+        ("ALIGN", (1,0), (1,-1), "RIGHT"),
+    ]))
+    story.append(st)
+
+    # 備考
+    if invoice.notes:
+        story.append(Spacer(1, 8))
+        story.append(Paragraph(f"備考：{invoice.notes}", styles["Normal"]))
+
+    doc.build(story)

requirements.txt

@@ -3,4 +3,6 @@ uvicorn[standard]>=0.27
 sqlmodel>=0.0.16
 pydantic>=2.6
 python-multipart>=0.0.9
-openai>=1.40.0
+openai>=1.40.0
+jinja2
+reportlab

static:app.html

@@ -0,0 +1,331 @@
+<!doctype html>
+<html lang="ja">
+<head>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1" />
+  <title>Mini Invoice/Estimate SaaS</title>
+  <script>
+    const BASE = location.origin;
+    let API_KEY = localStorage.getItem("X_API_Key") || "dev";
+
+    async function api(path, method="GET", body=null) {
+      const res = await fetch(`${BASE}${path}`, {
+        method,
+        headers: {
+          "X-API-Key": API_KEY,
+          "Content-Type": "application/json"
+        },
+        body: body ? JSON.stringify(body) : null
+      });
+      if (!res.ok) {
+        const txt = await res.text();
+        throw new Error(`${res.status} ${txt}`);
+      }
+      const ct = res.headers.get("content-type") || "";
+      return ct.includes("application/json") ? res.json() : res.text();
+    }
+
+    function saveKey() {
+      API_KEY = document.querySelector("#api_key").value || "dev";
+      localStorage.setItem("X_API_Key", API_KEY);
+      log("X-API-Key を設定: " + API_KEY);
+    }
+
+    // ---- Customers ----
+    async function createCustomer() {
+      const name  = document.querySelector("#c_name").value;
+      const email = document.querySelector("#c_email").value;
+      const phone = document.querySelector("#c_phone").value;
+      const address = document.querySelector("#c_addr").value;
+      const city = document.querySelector("#c_city").value;
+      const country = document.querySelector("#c_country").value;
+      const r = await api("/customers", "POST", {name, email, phone, address, city, country});
+      document.querySelector("#customer_id").value = r.id;
+      log("顧客作成 OK: id=" + r.id);
+      await searchCustomers(); // 反映
+    }
+
+    async function searchCustomers() {
+      const q = document.querySelector("#c_query").value;
+      const url = q ? `/customers?q=${encodeURIComponent(q)}` : "/customers";
+      const r = await api(url, "GET");
+      const tbody = document.querySelector("#customers_tbody");
+      tbody.innerHTML = "";
+      for (const c of r.data || []) {
+        const tr = document.createElement("tr");
+        tr.innerHTML = `
+          <td>${c.id}</td>
+          <td>${c.name || ""}</td>
+          <td>${c.email || ""}</td>
+          <td>${c.phone || ""}</td>
+          <td><button data-id="${c.id}">選択</button></td>`;
+        tr.querySelector("button").onclick = () => {
+          document.querySelector("#customer_id").value = c.id;
+          log("顧客を選択: id=" + c.id);
+        };
+        tbody.appendChild(tr);
+      }
+    }
+
+    // ---- Quotes ----
+    async function createQuote() {
+      const customer_id = +document.querySelector("#customer_id").value;
+      const valid_until = document.querySelector("#q_valid").value || null;
+      const notes = document.querySelector("#q_notes").value || null;
+      const q = await api("/quotes", "POST", {customer_id, valid_until, notes});
+      document.querySelector("#quote_id").value = q.id;
+      log("見積作成 OK: id=" + q.id);
+    }
+
+    async function addQuoteItem() {
+      const id = +document.querySelector("#quote_id").value;
+      const description = document.querySelector("#qit_desc").value;
+      const quantity = parseFloat(document.querySelector("#qit_qty").value || "1");
+      const unit_price = parseFloat(document.querySelector("#qit_price").value || "0");
+      const tax_rate = parseFloat(document.querySelector("#qit_tax").value || "0");
+      await api(`/quotes/${id}/items`, "POST", {description, quantity, unit_price, tax_rate});
+      log("見積 明細追加 OK");
+    }
+
+    // ---- Invoices ----
+    async function createInvoice() {
+      const customer_id = +document.querySelector("#customer_id").value;
+      const due_date = document.querySelector("#i_due").value || null;
+      const notes = document.querySelector("#i_notes").value || null;
+      const quote_id = document.querySelector("#quote_to_copy").value ? +document.querySelector("#quote_to_copy").value : null;
+      const payload = {customer_id, due_date, notes};
+      if (quote_id) payload.quote_id = quote_id; // 見積→請求 変換
+      const r = await api("/invoices", "POST", payload);
+      document.querySelector("#invoice_id").value = r.id;
+      log("請求書作成 OK: id=" + r.id + (quote_id ? "（見積コピーあり）" : ""));
+    }
+
+    async function addInvoiceItem() {
+      const id = +document.querySelector("#invoice_id").value;
+      const description = document.querySelector("#it_desc").value;
+      const quantity = parseFloat(document.querySelector("#it_qty").value || "1");
+      const unit_price = parseFloat(document.querySelector("#it_price").value || "0");
+      const tax_rate = parseFloat(document.querySelector("#it_tax").value || "0");
+      await api(`/invoices/${id}/items`, "POST", {description, quantity, unit_price, tax_rate});
+      log("請求 明細追加 OK");
+    }
+
+    async function viewInvoice() {
+      const id = +document.querySelector("#invoice_id").value;
+      const r = await api(`/invoices/${id}`, "GET");
+      document.querySelector("#totals").textContent =
+        `小計: ${r.totals.subtotal} / 税額: ${r.totals.tax} / 合計: ${r.totals.total}`;
+      log("請求書取得 OK");
+      return r;
+    }
+
+    async function markPaid() {
+      const id = +document.querySelector("#invoice_id").value;
+      const paid_amount = parseFloat(document.querySelector("#paid_amount").value || "0");
+      const payment_method = document.querySelector("#paid_method").value || "bank_transfer";
+      const r = await api(`/invoices/${id}/pay`, "POST", {paid_amount, payment_method});
+      log("入金登録 OK: " + JSON.stringify(r.invoice));
+    }
+
+    function downloadPDF() {
+      const id = +document.querySelector("#invoice_id").value;
+      const url = `${BASE}/invoices/${id}/pdf`;
+      fetch(url, { headers: { "X-API-Key": API_KEY }})
+        .then(res => {
+          if (!res.ok) throw new Error("PDF生成に失敗");
+          return res.blob();
+        })
+        .then(blob => {
+          const a = document.createElement("a");
+          a.href = URL.createObjectURL(blob);
+          a.download = `invoice_${id}.pdf`;
+          a.click();
+        }).catch(e => log("PDF失敗: " + e.message));
+    }
+
+    async function sendEmail() {
+      const id = +document.querySelector("#invoice_id").value;
+      const to = document.querySelector("#m_to").value;
+      const subject = document.querySelector("#m_subject").value;
+      const body = document.querySelector("#m_body").value;
+      const r = await api(`/invoices/${id}/email`, "POST", {to, subject, body, attach_pdf: true});
+      log("メール送信: " + (r.ok ? "OK" : "NG") + " / " + r.detail);
+    }
+
+    // ---- AI 文面生成（/ai/generate-email）----
+    async function generateAIEmail() {
+      const id = +document.querySelector("#invoice_id").value;
+      if (!id) {
+        log("先に請求書を作成し、invoice_id を入力してください");
+        return;
+      }
+      const detail = await viewInvoice(); // invoice, items, totals を取得
+      const invoice = detail.invoice;
+      const items = (detail.items || []).map(it => ({
+        description: it.description,
+        quantity: it.quantity,
+        unit_price: it.unit_price,
+        tax_rate: it.tax_rate
+      }));
+
+      // 顧客名を取得（請求先の見栄え強化）
+      let customerName = `Customer #${invoice.customer_id}`;
+      try {
+        const custList = await api(`/customers?q=${invoice.customer_id}`, "GET");
+        const hit = (custList.data || []).find(c => c.id === invoice.customer_id);
+        if (hit && hit.name) customerName = hit.name + " 御中";
+      } catch {}
+
+      const payload = {
+        kind: "invoice",
+        company_name: "HitC Inc.",
+        customer_name: customerName,
+        language: "ja",
+        tone: "polite",
+        due_date: invoice.due_date || null,
+        notes: invoice.notes || null,
+        items
+      };
+
+      try {
+        const res = await api("/ai/generate-email", "POST", payload);
+        // モデルは「件名と本文」を返すよう実装済み
+        // ヒューリスティックで件名/本文に分割
+        const txt = res.email || "";
+        const m = txt.match(/^(?:件名|Subject)[:：]\s*(.+)\n([\s\S]*)$/m);
+        if (m) {
+          document.querySelector("#m_subject").value = m[1].trim();
+          document.querySelector("#m_body").value = m[2].trim();
+        } else {
+          document.querySelector("#m_subject").value = "ご請求書送付の件";
+          document.querySelector("#m_body").value = txt;
+        }
+        log("AI 文面生成 OK");
+      } catch (e) {
+        log("AI 文面生成に失敗: " + e.message);
+      }
+    }
+
+    function log(msg) {
+      const el = document.querySelector("#log");
+      el.textContent = `[${new Date().toLocaleTimeString()}] ${msg}\n` + el.textContent;
+    }
+
+    window.addEventListener("load", () => {
+      document.querySelector("#api_key").value = API_KEY;
+      searchCustomers().catch(()=>{});
+    });
+  </script>
+  <style>
+    body { font-family: system-ui, sans-serif; margin: 16px; }
+    fieldset { border: 1px solid #ddd; padding: 12px; margin-bottom: 12px; }
+    legend { padding: 0 6px; }
+    label { display:block; margin-top:6px; }
+    input, textarea { width: 100%; padding: 6px; }
+    button { margin-top: 8px; padding: 6px 10px; }
+    table { width:100%; border-collapse: collapse; margin-top: 6px; }
+    th, td { border:1px solid #eee; padding:6px; }
+    th { background:#fafafa; }
+    #log { white-space: pre-wrap; border:1px solid #eee; padding:8px; min-height:80px; }
+    .row { display:grid; grid-template-columns: 1fr 1fr; gap: 12px; }
+    @media (max-width: 800px){ .row { grid-template-columns: 1fr; } }
+  </style>
+</head>
+<body>
+  <h1>Mini Invoice/Estimate SaaS</h1>
+
+  <fieldset>
+    <legend>設定</legend>
+    <label> X-API-Key <input id="api_key" placeholder="dev"/></label>
+    <button onclick="saveKey()">保存</button>
+    <div>UI: <code>/app</code> / API例: <code>/invoices</code> / AI: <code>/ai/generate-email</code></div>
+  </fieldset>
+
+  <div class="row">
+    <fieldset>
+      <legend>顧客（作成）</legend>
+      <label>会社名 <input id="c_name" /></label>
+      <label>メール <input id="c_email" /></label>
+      <label>電話 <input id="c_phone" /></label>
+      <label>住所 <input id="c_addr" /></label>
+      <label>市区町村 <input id="c_city" /></label>
+      <label>国 <input id="c_country" value="JP" /></label>
+      <button onclick="createCustomer()">顧客を作成</button>
+      <label>customer_id <input id="customer_id" placeholder="自動セット"/></label>
+    </fieldset>
+
+    <fieldset>
+      <legend>顧客（一覧/検索）</legend>
+      <label>キーワード <input id="c_query" placeholder="社名/メール/電話"/></label>
+      <button onclick="searchCustomers()">検索</button>
+      <table>
+        <thead><tr><th>ID</th><th>名称</th><th>メール</th><th>電話</th><th>操作</th></tr></thead>
+        <tbody id="customers_tbody"></tbody>
+      </table>
+    </fieldset>
+  </div>
+
+  <div class="row">
+    <fieldset>
+      <legend>見積</legend>
+      <label>有効期限(yyyy-mm-dd) <input id="q_valid" /></label>
+      <label>備考 <input id="q_notes" /></label>
+      <button onclick="createQuote()">見積を作成</button>
+      <label>quote_id <input id="quote_id" placeholder="自動セット"/></label>
+
+      <h4>見積 明細</h4>
+      <label>内容 <input id="qit_desc" /></label>
+      <label>数量 <input id="qit_qty" value="1" /></label>
+      <label>単価 <input id="qit_price" value="0" /></label>
+      <label>税率(例 0.1) <input id="qit_tax" value="0.1" /></label>
+      <button onclick="addQuoteItem()">見積 明細を追加</button>
+    </fieldset>
+
+    <fieldset>
+      <legend>請求書</legend>
+      <label>支払期日(yyyy-mm-dd) <input id="i_due" /></label>
+      <label>備考 <input id="i_notes" /></label>
+      <label>見積IDからコピー（任意） <input id="quote_to_copy" placeholder="例: 1"/></label>
+      <button onclick="createInvoice()">請求書を作成</button>
+      <label>invoice_id <input id="invoice_id" placeholder="自動セット"/></label>
+
+      <h4>請求 明細</h4>
+      <label>内容 <input id="it_desc" /></label>
+      <label>数量 <input id="it_qty" value="1" /></label>
+      <label>単価 <input id="it_price" value="0" /></label>
+      <label>税率(例 0.1) <input id="it_tax" value="0.1" /></label>
+      <button onclick="addInvoiceItem()">請求 明細を追加</button>
+      <button onclick="viewInvoice()">合計を表示</button>
+      <div id="totals" style="margin-top:6px;color:#0a0"></div>
+    </fieldset>
+  </div>
+
+  <div class="row">
+    <fieldset>
+      <legend>入金登録</legend>
+      <label>受取金額 <input id="paid_amount" value="0" /></label>
+      <label>方法 <input id="paid_method" value="bank_transfer" /></label>
+      <button onclick="markPaid()">入金反映</button>
+    </fieldset>
+
+    <fieldset>
+      <legend>PDF / メール</legend>
+      <button onclick="downloadPDF()">PDFダウンロード</button>
+      <hr/>
+      <label>宛先(To) <input id="m_to" /></label>
+      <label>件名 <input id="m_subject" value="ご請求書送付の件" /></label>
+      <label>本文 <textarea id="m_body" rows="8">いつもお世話になっております。ご請求書をお送りします。ご確認をお願いいたします。</textarea></label>
+      <div style="display:flex; gap:8px; flex-wrap:wrap;">
+        <button onclick="generateAIEmail()">AIで文面作成</button>
+        <button onclick="sendEmail()">メール送信（PDF添付）</button>
+      </div>
+      <div style="color:#888; margin-top:6px;">※ SMTP が未設定の場合は送信スキップ（詳細はレスポンスに表示）</div>
+    </fieldset>
+  </div>
+
+  <fieldset>
+    <legend>ログ</legend>
+    <div id="log"></div>
+  </fieldset>
+</body>
+</html>