Découpage des paiements + page de saisie

compta/admin.py

@@ -2,7 +2,7 @@ from django.contrib import admin
 from django.utils import timezone
 
 from .models import (
-    Bareme, Entreprise, Client, Facture, LigneFacture, Depense,
+    Bareme, Entreprise, Client, Facture, LigneFacture, Depense, Paiement,
 )
 
 
@@ -55,10 +55,39 @@ class FactureAdmin(admin.ModelAdmin):
         form.instance.recompute_totaux()
 
 
+class DepenseInline(admin.TabularInline):
+    model = Depense
+    extra = 0
+    fields = ("date", "libelle", "activite", "regime_tva", "taux_tva",
+              "montant_ttc", "montant_tva")
+
+
+@admin.register(Paiement)
+class PaiementAdmin(admin.ModelAdmin):
+    list_display = ("date", "entreprise", "libelle", "sens", "montant_total",
+                    "reparti", "reste", "equilibre")
+    list_filter = ("entreprise", "sens", "date")
+    search_fields = ("libelle",)
+    date_hierarchy = "date"
+    inlines = [DepenseInline]
+
+    @admin.display(description="Réparti")
+    def reparti(self, obj):
+        return obj.reparti
+
+    @admin.display(description="Reste")
+    def reste(self, obj):
+        return obj.reste
+
+    @admin.display(boolean=True, description="Équilibré")
+    def equilibre(self, obj):
+        return obj.equilibre
+
+
 @admin.register(Depense)
 class DepenseAdmin(admin.ModelAdmin):
     list_display = ("date", "entreprise", "libelle", "activite", "regime_tva",
-                    "montant_ttc", "montant_tva", "tva_autoliq")
+                    "montant_ttc", "montant_tva", "tva_autoliq", "paiement")
     list_filter = ("entreprise", "regime_tva", "activite", "categorie", "date")
     search_fields = ("libelle", "categorie")
     date_hierarchy = "date"

compta/migrations/0004_paiement_depense_paiement.py

@@ -0,0 +1,36 @@
+# Generated by Django 5.2.15 on 2026-06-29 22:16
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('compta', '0003_depense_regime_tva_depense_taux_tva_and_more'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Paiement',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('date', models.DateField()),
+                ('libelle', models.CharField(max_length=255, verbose_name='Libellé bancaire')),
+                ('montant_total', models.DecimalField(decimal_places=2, max_digits=12)),
+                ('sens', models.CharField(choices=[('debit', 'Débit (achat)'), ('credit', 'Crédit (encaissement)')], default='debit', max_length=6)),
+                ('cree_le', models.DateTimeField(auto_now_add=True)),
+                ('entreprise', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='paiements', to='compta.entreprise')),
+            ],
+            options={
+                'verbose_name': 'Paiement',
+                'verbose_name_plural': 'Paiements',
+                'ordering': ['-date'],
+            },
+        ),
+        migrations.AddField(
+            model_name='depense',
+            name='paiement',
+            field=models.ForeignKey(blank=True, help_text='Opération bancaire dont cette dépense fait partie (achat groupé éclaté).', null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='depenses', to='compta.paiement'),
+        ),
+    ]

compta/models.py

@@ -180,9 +180,47 @@ class LigneFacture(models.Model):
         return (self.quantite * self.prix_unitaire_ht).quantize(Decimal("0.01"))
 
 
+class Paiement(models.Model):
+    """Opération bancaire réelle, à éclater en une ou plusieurs dépenses
+    (ex. un débit Amazon regroupant plusieurs vendeurs/factures)."""
+    SENS = [("debit", "Débit (achat)"), ("credit", "Crédit (encaissement)")]
+    entreprise = models.ForeignKey(Entreprise, on_delete=models.CASCADE,
+                                   related_name="paiements")
+    date = models.DateField()
+    libelle = models.CharField("Libellé bancaire", max_length=255)
+    montant_total = models.DecimalField(max_digits=12, decimal_places=2)
+    sens = models.CharField(max_length=6, choices=SENS, default="debit")
+    cree_le = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        verbose_name = "Paiement"
+        verbose_name_plural = "Paiements"
+        ordering = ["-date"]
+
+    def __str__(self):
+        return f"{self.date} — {self.libelle} ({self.montant_total} €)"
+
+    @property
+    def reparti(self):
+        total = self.depenses.aggregate(s=Sum("montant_ttc"))["s"] or Decimal("0")
+        return total.quantize(Decimal("0.01"))
+
+    @property
+    def reste(self):
+        return (self.montant_total - self.reparti).quantize(Decimal("0.01"))
+
+    @property
+    def equilibre(self):
+        return abs(self.reste) < Decimal("0.01")
+
+
 class Depense(models.Model):
     entreprise = models.ForeignKey(Entreprise, on_delete=models.CASCADE,
                                    related_name="depenses")
+    paiement = models.ForeignKey(Paiement, on_delete=models.SET_NULL,
+                                 null=True, blank=True, related_name="depenses",
+                                 help_text="Opération bancaire dont cette dépense "
+                                           "fait partie (achat groupé éclaté).")
     date = models.DateField()
     activite = models.CharField(
         max_length=20, choices=Activite.choices, blank=True,

compta/templates/compta/dashboard.html

@@ -62,7 +62,8 @@
         <option value="{{ a }}" {% if a == annee %}selected{% endif %}>{{ a }}</option>
       {% endfor %}
     </select>
-    <a href="/admin/"><button type="button">Saisie / Admin</button></a>
+    <a href="/saisie/"><button type="button">+ Saisir un paiement</button></a>
+    <a href="/admin/"><button type="button">Admin</button></a>
   </form>
 
   {% if bareme_manquant %}

compta/templates/compta/saisie_paiement.html

@@ -0,0 +1,152 @@
+<!DOCTYPE html>
+<html lang="fr">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<title>JB Compta — Saisie d'un paiement</title>
+<style>
+  :root { --bg:#0f172a; --card:#1e293b; --txt:#e2e8f0; --muted:#94a3b8;
+          --accent:#38bdf8; --ok:#34d399; --warn:#fbbf24; --bad:#f87171; }
+  * { box-sizing:border-box; }
+  body { margin:0; font-family:system-ui,Segoe UI,Roboto,sans-serif;
+         background:var(--bg); color:var(--txt); padding:24px; }
+  h1 { margin:0 0 4px; font-size:22px; }
+  .sub { color:var(--muted); margin-bottom:20px; }
+  a { color:var(--accent); }
+  .card { background:var(--card); border:1px solid #334155; border-radius:12px;
+          padding:16px; margin-bottom:16px; }
+  label { display:block; font-size:12px; color:var(--muted); margin-bottom:4px; }
+  input, select { background:#0f172a; color:var(--txt); border:1px solid #334155;
+                  border-radius:8px; padding:8px 10px; font-size:14px; width:100%; }
+  .head { display:grid; grid-template-columns:1fr 1fr 2fr 1fr; gap:12px; }
+  @media(max-width:700px){ .head{grid-template-columns:1fr 1fr;} }
+  table { width:100%; border-collapse:collapse; font-size:13px; margin-top:8px; }
+  th,td { padding:6px; border-bottom:1px solid #334155; text-align:left; vertical-align:top; }
+  th { color:var(--muted); font-weight:600; }
+  td input, td select { padding:6px 8px; }
+  .num { text-align:right; }
+  button { cursor:pointer; border-radius:8px; border:1px solid #334155;
+           background:var(--card); color:var(--txt); padding:8px 14px; font-size:14px; }
+  button.primary { background:var(--accent); color:#04263a; border:none; font-weight:600; }
+  button.mini { padding:4px 8px; }
+  .totaux { display:flex; gap:24px; align-items:center; margin-top:12px; flex-wrap:wrap; }
+  .totaux b { font-size:18px; }
+  .ok{color:var(--ok)} .bad{color:var(--bad)}
+  .msg { padding:10px 14px; border-radius:8px; margin-bottom:10px; }
+  .msg.error { background:#7f1d1d; }
+  .msg.success { background:#064e3b; }
+  .actions { display:flex; gap:12px; margin-top:16px; }
+</style>
+</head>
+<body>
+  <h1>Saisie d'un paiement</h1>
+  <div class="sub">Éclate une opération bancaire (ex. un débit Amazon groupé) en
+     plusieurs dépenses. · <a href="/dashboard/">← Tableau de bord</a> ·
+     <a href="/admin/compta/depense/">Voir les dépenses</a></div>
+
+  {% if messages %}
+    {% for m in messages %}
+      <div class="msg {{ m.tags }}">{{ m }}</div>
+    {% endfor %}
+  {% endif %}
+
+  <form method="post" id="frm">
+    {% csrf_token %}
+    <div class="card">
+      <div class="head">
+        <div>
+          <label>Entreprise</label>
+          <select name="entreprise" required>
+            {% for e in entreprises %}<option value="{{ e.pk }}">{{ e.nom }}</option>{% endfor %}
+          </select>
+        </div>
+        <div>
+          <label>Date</label>
+          <input type="date" name="date" value="{{ today }}">
+        </div>
+        <div>
+          <label>Libellé bancaire</label>
+          <input type="text" name="libelle" placeholder="ex. AMAZON EU SARL" required>
+        </div>
+        <div>
+          <label>Montant total payé (€)</label>
+          <input type="number" step="0.01" name="montant_total" id="total"
+                 placeholder="150.00" oninput="recalc()">
+        </div>
+      </div>
+    </div>
+
+    <div class="card">
+      <table>
+        <thead>
+          <tr>
+            <th style="width:24%">Libellé / vendeur</th>
+            <th style="width:14%">Catégorie</th>
+            <th style="width:16%">Activité</th>
+            <th style="width:16%">Régime TVA</th>
+            <th style="width:8%">Taux %</th>
+            <th style="width:11%">Montant €</th>
+            <th style="width:11%">TVA déduct. €</th>
+            <th></th>
+          </tr>
+        </thead>
+        <tbody id="lignes"></tbody>
+      </table>
+
+      <div class="actions">
+        <button type="button" onclick="addRow()">+ Ajouter une ligne</button>
+      </div>
+
+      <div class="totaux">
+        <span>Réparti : <b id="repartis">0.00</b> €</span>
+        <span>Reste : <b id="reste" class="bad">0.00</b> €</span>
+      </div>
+    </div>
+
+    <div class="actions">
+      <button type="submit" class="primary">Enregistrer le paiement</button>
+    </div>
+  </form>
+
+  <template id="rowtpl">
+    <tr>
+      <td><input type="text" name="l_libelle" placeholder="Vendeur / objet"></td>
+      <td><input type="text" name="l_categorie" placeholder="ex. Matériel"></td>
+      <td>
+        <select name="l_activite">
+          <option value="">—</option>
+          {% for val,lab in activites %}<option value="{{ val }}">{{ lab }}</option>{% endfor %}
+        </select>
+      </td>
+      <td>
+        <select name="l_regime">
+          {% for val,lab in regimes %}<option value="{{ val }}">{{ lab }}</option>{% endfor %}
+        </select>
+      </td>
+      <td><input type="number" step="0.01" name="l_taux" value="0" class="num"></td>
+      <td><input type="number" step="0.01" name="l_montant" class="num montant" oninput="recalc()"></td>
+      <td><input type="number" step="0.01" name="l_tva" value="0" class="num"></td>
+      <td><button type="button" class="mini" onclick="this.closest('tr').remove();recalc()">✕</button></td>
+    </tr>
+  </template>
+
+  <script>
+    function addRow(){
+      const tpl = document.getElementById('rowtpl');
+      document.getElementById('lignes').appendChild(tpl.content.cloneNode(true));
+    }
+    function recalc(){
+      let s = 0;
+      document.querySelectorAll('.montant').forEach(i => s += parseFloat(i.value||0));
+      const total = parseFloat(document.getElementById('total').value||0);
+      document.getElementById('repartis').textContent = s.toFixed(2);
+      const reste = (total - s);
+      const el = document.getElementById('reste');
+      el.textContent = reste.toFixed(2);
+      el.className = Math.abs(reste) < 0.01 ? 'ok' : 'bad';
+    }
+    // 3 lignes au départ
+    addRow(); addRow(); addRow();
+  </script>
+</body>
+</html>

compta/urls.py

@@ -1,8 +1,10 @@
 from django.urls import path
 from . import views
+from . import views_saisie
 
 urlpatterns = [
     path("dashboard/", views.dashboard, name="dashboard"),
+    path("saisie/", views_saisie.saisie_paiement, name="saisie_paiement"),
     path("export/ventes/", views.export_ventes, name="export_ventes"),
     path("export/tva/", views.export_tva, name="export_tva"),
     path("export/urssaf/", views.export_urssaf, name="export_urssaf"),

compta/views_saisie.py

@@ -0,0 +1,99 @@
+"""
+Page de saisie / import : éclater un paiement bancaire en plusieurs dépenses.
+"""
+from decimal import Decimal, InvalidOperation
+from datetime import date
+
+from django.contrib import messages
+from django.contrib.auth.decorators import login_required
+from django.shortcuts import render, redirect
+
+from .models import Entreprise, Paiement, Depense, Activite, RegimeTva
+
+
+def _dec(val, defaut="0"):
+    try:
+        return Decimal((val or defaut).replace(",", ".").strip() or defaut)
+    except (InvalidOperation, AttributeError):
+        return Decimal(defaut)
+
+
+@login_required
+def saisie_paiement(request):
+    entreprises = Entreprise.objects.all()
+
+    if request.method == "POST":
+        entreprise = entreprises.filter(pk=request.POST.get("entreprise")).first()
+        d = request.POST.get("date") or date.today().isoformat()
+        libelle = (request.POST.get("libelle") or "").strip()
+        montant_total = _dec(request.POST.get("montant_total"))
+
+        libelles = request.POST.getlist("l_libelle")
+        categories = request.POST.getlist("l_categorie")
+        activites = request.POST.getlist("l_activite")
+        regimes = request.POST.getlist("l_regime")
+        taux = request.POST.getlist("l_taux")
+        montants = request.POST.getlist("l_montant")
+        tvas = request.POST.getlist("l_tva")
+
+        lignes = []
+        for i in range(len(libelles)):
+            m = _dec(montants[i] if i < len(montants) else "0")
+            lib = (libelles[i] or "").strip()
+            if m == 0 and not lib:
+                continue  # ligne vide ignorée
+            lignes.append({
+                "libelle": lib or "(sans libellé)",
+                "categorie": categories[i] if i < len(categories) else "",
+                "activite": activites[i] if i < len(activites) else "",
+                "regime": regimes[i] if i < len(regimes) else RegimeTva.NATIONALE,
+                "taux": _dec(taux[i] if i < len(taux) else "0"),
+                "montant": m,
+                "tva": _dec(tvas[i] if i < len(tvas) else "0"),
+            })
+
+        somme = sum((l["montant"] for l in lignes), Decimal("0"))
+        erreurs = []
+        if not entreprise:
+            erreurs.append("Sélectionne une entreprise.")
+        if not libelle:
+            erreurs.append("Renseigne le libellé du paiement.")
+        if not lignes:
+            erreurs.append("Ajoute au moins une ligne de dépense.")
+        if lignes and abs(somme - montant_total) >= Decimal("0.01"):
+            erreurs.append(
+                f"La somme des lignes ({somme} €) ne correspond pas au "
+                f"montant total ({montant_total} €). Écart : {somme - montant_total} €.")
+
+        if erreurs:
+            for e in erreurs:
+                messages.error(request, e)
+            return render(request, "compta/saisie_paiement.html",
+                          _context(entreprises, request.POST))
+
+        paiement = Paiement.objects.create(
+            entreprise=entreprise, date=d, libelle=libelle,
+            montant_total=montant_total, sens="debit")
+        for l in lignes:
+            Depense.objects.create(
+                entreprise=entreprise, paiement=paiement, date=d,
+                libelle=l["libelle"], categorie=l["categorie"],
+                activite=l["activite"] or "", regime_tva=l["regime"],
+                taux_tva=l["taux"], montant_ttc=l["montant"], montant_tva=l["tva"])
+
+        messages.success(
+            request,
+            f"Paiement « {libelle} » enregistré et éclaté en {len(lignes)} dépense(s).")
+        return redirect("saisie_paiement")
+
+    return render(request, "compta/saisie_paiement.html", _context(entreprises))
+
+
+def _context(entreprises, post=None):
+    return {
+        "entreprises": entreprises,
+        "activites": Activite.choices,
+        "regimes": RegimeTva.choices,
+        "today": date.today().isoformat(),
+        "post": post,
+    }