{% extends "base.html" %}
{% block title %}{{ titre }}{% endblock %}
{% block content %}
<div class="page-header">
    <h1>{{ titre }}</h1>
    <a href="/devis/" class="btn">← Retour</a>
</div>

<form method="post" class="form-card" id="form-devis">
    <div class="form-grid">
        <div class="form-group">
            <label>Client *</label>
            <select name="client_id" required>
                <option value="">— Sélectionner —</option>
                {% for c in clients %}
                <option value="{{ c.id }}" {% if devis and devis.client_id == c.id %}selected{% endif %}>
                    {{ c.nom }} — {{ c.ville }}
                </option>
                {% endfor %}
            </select>
        </div>
        <div class="form-group">
            <label>Date d'émission *</label>
            <input type="date" name="date_emission" required value="{{ date_aujourd_hui }}">
        </div>
        <div class="form-group">
            <label>Date de validité *</label>
            <input type="date" name="date_validite" required value="{{ date_validite_defaut }}">
        </div>
        <div class="form-group full">
            <label>Conditions</label>
            <textarea name="conditions" rows="2">{{ devis.conditions if devis else '' }}</textarea>
        </div>
        <div class="form-group full">
            <label>Notes internes</label>
            <textarea name="notes" rows="2">{{ devis.notes if devis else '' }}</textarea>
        </div>
    </div>

    <h2>Lignes</h2>
    <table id="table-lignes">
        <thead>
            <tr>
                <th>Description</th>
                <th>Qté</th>
                <th>PU HT (€)</th>
                <th>Total HT</th>
                <th></th>
            </tr>
        </thead>
        <tbody id="lignes-body">
            {% if devis and devis.lignes %}
            {% for l in devis.lignes %}
            <tr class="ligne-row">
                <td><input type="text" class="ligne-desc" placeholder="Description" value="{{ l.description }}" required></td>
                <td><input type="number" class="ligne-qte" step="0.01" min="0.01" value="{{ l.quantite }}" required></td>
                <td><input type="number" class="ligne-pu" step="0.01" min="0" value="{{ l.prix_unitaire_ht }}" required></td>
                <td class="ligne-total">{{ (l.quantite * l.prix_unitaire_ht) | round(2) }} €</td>
                <td><button type="button" class="btn btn-sm btn-danger btn-suppr-ligne">✕</button></td>
            </tr>
            {% endfor %}
            {% endif %}
        </tbody>
    </table>
    <button type="button" id="btn-ajouter-ligne" class="btn">+ Ajouter une ligne</button>

    <div class="total-bloc">
        <strong>Total HT : <span id="total-ht">0,00 €</span></strong>
        <br><small>TVA non applicable — art. 293B du CGI</small>
    </div>

    <input type="hidden" name="lignes_json" id="lignes_json">

    <div class="form-actions">
        <button type="submit" class="btn btn-primary">Enregistrer</button>
        <a href="/devis/" class="btn">Annuler</a>
    </div>
</form>

<script>
function recalculer() {
    let total = 0;
    document.querySelectorAll('.ligne-row').forEach(row => {
        const qte = parseFloat(row.querySelector('.ligne-qte').value) || 0;
        const pu = parseFloat(row.querySelector('.ligne-pu').value) || 0;
        const t = qte * pu;
        row.querySelector('.ligne-total').textContent = t.toFixed(2).replace('.', ',') + ' €';
        total += t;
    });
    document.getElementById('total-ht').textContent = total.toFixed(2).replace('.', ',') + ' €';
}
function ajouterLigne() {
    const tbody = document.getElementById('lignes-body');
    const tr = document.createElement('tr');
    tr.className = 'ligne-row';
    tr.innerHTML = `
        <td><input type="text" class="ligne-desc" placeholder="Description" required></td>
        <td><input type="number" class="ligne-qte" step="0.01" min="0.01" value="1" required></td>
        <td><input type="number" class="ligne-pu" step="0.01" min="0" value="0" required></td>
        <td class="ligne-total">0,00 €</td>
        <td><button type="button" class="btn btn-sm btn-danger btn-suppr-ligne">✕</button></td>
    `;
    tbody.appendChild(tr);
    tr.querySelectorAll('input').forEach(i => i.addEventListener('input', recalculer));
    tr.querySelector('.btn-suppr-ligne').addEventListener('click', () => { tr.remove(); recalculer(); });
}
document.getElementById('btn-ajouter-ligne').addEventListener('click', ajouterLigne);
document.querySelectorAll('.ligne-row').forEach(row => {
    row.querySelectorAll('input').forEach(i => i.addEventListener('input', recalculer));
    row.querySelector('.btn-suppr-ligne').addEventListener('click', () => { row.remove(); recalculer(); });
});
document.getElementById('form-devis').addEventListener('submit', function(e) {
    const lignes = [];
    let valide = true;
    document.querySelectorAll('.ligne-row').forEach(row => {
        const desc = row.querySelector('.ligne-desc').value.trim();
        const qte = parseFloat(row.querySelector('.ligne-qte').value);
        const pu = parseFloat(row.querySelector('.ligne-pu').value);
        if (!desc || isNaN(qte) || isNaN(pu)) { valide = false; return; }
        lignes.push({ description: desc, quantite: qte, prix_unitaire_ht: pu });
    });
    if (!valide || lignes.length === 0) {
        e.preventDefault();
        alert('Veuillez saisir au moins une ligne valide.');
        return;
    }
    document.getElementById('lignes_json').value = JSON.stringify(lignes);
});
recalculer();
</script>
{% endblock %}