@extends('layouts.app')
@section('title', ($template->exists ? $template->name : 'Nouveau template').' — Signatures CABM')
@section('content')
    @php
        $isAdmin = auth()->user()->hasRole('admin');
        $dirty = $template->exists && ($template->draft_html_full !== $template->html_full || $template->draft_html_short !== $template->html_short);
        $tag = fn (string $inner) => '{'.'{'.$inner.'}'.'}';
        $snippets = [
            'banniere' => '{'.'{'.'{banniere}'.'}'.'}',
            'site_url' => $tag('site_url'),
            'if' => $tag('#if mobile').'Mob. '.$tag('mobile').'<br>'.$tag('/if'),
            'if_open' => $tag('#if variable'),
            'if_close' => $tag('/if'),
            'img' => $tag('site_url').'/img/fichier.png',
        ];
    @endphp

    <div class="row" style="margin-bottom:16px">
        <a href="{{ route('admin.templates.index') }}">← Templates</a>
        <h1 style="margin:0 0 0 12px">{{ $template->exists ? $template->name : 'Nouveau template' }}</h1>
        @if ($template->is_default) <span class="badge">par défaut</span> @endif
        @if ($template->exists)
            @if (! $template->published_version)
                <span class="badge warn">jamais publié</span>
            @elseif ($dirty)
                <span class="badge warn">brouillon modifié depuis v{{ $template->published_version }}</span>
            @else
                <span class="badge ok">publié · v{{ $template->published_version }}</span>
            @endif
        @endif
        <span class="spacer"></span>
        @if ($template->exists && $isAdmin)
            <form class="inline" method="post" action="{{ route('admin.templates.publish', $template) }}"
                  onsubmit="return confirm('Publier le brouillon enregistré ? Il sera servi immédiatement aux agents concernés.')">
                @csrf
                <button class="btn" type="submit" @disabled(! $dirty && $template->published_version)>Publier</button>
            </form>
        @endif
    </div>

    <form method="post" id="template-form"
          action="{{ $template->exists ? route('admin.templates.update', $template) : route('admin.templates.store') }}">
        @csrf
        @if ($template->exists) @method('PUT') @endif

        <div class="split">
            <div class="card">
                <label for="name">Nom</label>
                <input type="text" id="name" name="name" required maxlength="120" value="{{ old('name', $template->name) }}">

                <label for="description">Description</label>
                <input type="text" id="description" name="description" maxlength="500" value="{{ old('description', $template->description) }}">

                <label for="draft_html_full">Signature complète (nouveaux messages, invitations)</label>
                <textarea class="code" id="draft_html_full" name="draft_html_full" data-variant="full" spellcheck="false" required>{{ old('draft_html_full', $template->draft_html_full) }}</textarea>

                <label for="draft_html_short">Signature courte (réponses et transferts)</label>
                <textarea class="code" id="draft_html_short" name="draft_html_short" data-variant="short" spellcheck="false" style="min-height:120px">{{ old('draft_html_short', $template->draft_html_short) }}</textarea>

                <div class="row" style="margin-top:12px">
                    <button class="btn" type="submit">Enregistrer le brouillon</button>
                    <span class="muted">L'enregistrement ne change rien pour les agents tant que le template n'est pas publié.</span>
                </div>
            </div>

            <div>
                <div class="card">
                    <div class="row">
                        <h2 style="margin:0">Aperçu</h2>
                        <span class="spacer"></span>
                        <select id="preview-variant" aria-label="Variante affichée" style="width:auto">
                            <option value="full">Complète</option>
                            <option value="short">Courte</option>
                        </select>
                    </div>
                    <label for="agent-search">Agent utilisé pour l'aperçu</label>
                    <input type="search" id="agent-search" list="agent-options" autocomplete="off"
                           placeholder="Nom ou adresse (2 caractères min.)"
                           value="{{ $previewAgent ? $previewAgent->display_name.' — '.$previewAgent->mail : '' }}">
                    <datalist id="agent-options"></datalist>
                    <input type="hidden" id="agent-id" value="{{ $previewAgent?->id }}">
                    <p class="muted" id="preview-status" aria-live="polite">&nbsp;</p>
                    @include('partials.signature-frame', ['id' => 'preview', 'html' => ''])
                </div>

                <div class="card">
                    <h2>Variables</h2>
                    <p class="muted">Cliquez pour insérer à l'emplacement du curseur. Une ligne entourée de
                        <code>{{ $snippets['if_open'] }}…{{ $snippets['if_close'] }}</code> disparaît quand le champ est vide.</p>
                    <div class="chips" id="variables">
                        @foreach ($variables as $key => $def)
                            <button type="button" data-insert="{{ $tag($key) }}" title="{{ $def['label'] }}">{{ $key }}</button>
                        @endforeach
                        <button type="button" data-insert="{{ $snippets['banniere'] }}" title="Bannière de campagne">banniere</button>
                        <button type="button" data-insert="{{ $snippets['site_url'] }}" title="URL publique (images)">site_url</button>
                        <button type="button" data-insert="{{ $snippets['if'] }}" title="Ligne conditionnelle">#if …</button>
                    </div>
                    <p class="muted">Images : déposez-les dans <code>public/img</code> et référencez
                        <code>{{ $snippets['img'] }}</code>. Pas de script ni de formulaire : ils sont retirés à l'enregistrement.</p>
                </div>
            </div>
        </div>
    </form>

    @if ($template->exists)
        <div class="card">
            <h2>Historique des publications</h2>
            <table class="list">
                <thead><tr><th>Version</th><th>Publiée le</th><th>Par</th><th></th></tr></thead>
                <tbody>
                @forelse ($versions as $v)
                    <tr>
                        <td>v{{ $v->version }} @if ($v->version === $template->published_version) <span class="badge ok">en ligne</span> @endif</td>
                        <td>{{ $v->created_at->timezone('Europe/Paris')->format('d/m/Y H:i') }}</td>
                        <td>{{ $v->publisher?->name ?? '—' }}</td>
                        <td style="text-align:right">
                            <form class="inline" method="post" action="{{ route('admin.templates.restore', [$template, $v]) }}"
                                  onsubmit="return confirm('Remplacer le brouillon actuel par la version {{ $v->version }} ?')">
                                @csrf
                                <button class="btn secondary small" type="submit">Recharger dans le brouillon</button>
                            </form>
                        </td>
                    </tr>
                @empty
                    <tr><td colspan="4" class="muted">Pas encore publié.</td></tr>
                @endforelse
                </tbody>
            </table>
        </div>

        @if ($isAdmin)
            <div class="card row">
                @unless ($template->is_default)
                    <form class="inline" method="post" action="{{ route('admin.templates.default', $template) }}">
                        @csrf
                        <button class="btn secondary" type="submit" @disabled(! $template->html_full)>Définir comme template par défaut</button>
                    </form>
                    <span class="spacer"></span>
                    <form class="inline" method="post" action="{{ route('admin.templates.destroy', $template) }}"
                          onsubmit="return confirm('Supprimer ce template et ses affectations ?')">
                        @csrf @method('DELETE')
                        <button class="btn danger" type="submit">Supprimer</button>
                    </form>
                @else
                    <span class="muted">Le template par défaut s'applique aux agents qui ne sont dans aucun groupe affecté. Il ne peut pas être supprimé.</span>
                @endunless
            </div>
        @endif
    @endif
@endsection

@push('scripts')
<script>
(() => {
    const csrf = document.querySelector('meta[name="csrf-token"]').content;
    const frame = document.getElementById('preview');
    const status = document.getElementById('preview-status');
    const variantSel = document.getElementById('preview-variant');
    const agentId = document.getElementById('agent-id');
    const agentSearch = document.getElementById('agent-search');
    const options = document.getElementById('agent-options');
    const areas = { full: document.getElementById('draft_html_full'), short: document.getElementById('draft_html_short') };
    let lastFocused = areas.full, timer = null, found = [];

    const shell = (html) => '<!doctype html><meta charset="utf-8"><body style="margin:12px">' + html + '</body>';

    async function refresh() {
        const variant = variantSel.value;
        const html = areas[variant].value || (variant === 'short' ? areas.full.value : '');
        status.textContent = 'Mise à jour…';
        try {
            const res = await fetch(@json(route('admin.templates.preview')), {
                method: 'POST',
                headers: { 'Content-Type': 'application/json', 'Accept': 'application/json', 'X-CSRF-TOKEN': csrf },
                body: JSON.stringify({ html, variant, agent_id: agentId.value || null }),
            });
            if (!res.ok) throw new Error(res.status);
            const data = await res.json();
            frame.srcdoc = shell(data.html);
            status.textContent = 'Aperçu pour ' + data.agent + (variant === 'short' && !areas.short.value ? ' (variante courte vide : la complète sera utilisée)' : '');
        } catch (e) {
            status.textContent = 'Aperçu indisponible (' + e.message + ').';
        }
    }
    const schedule = () => { clearTimeout(timer); timer = setTimeout(refresh, 400); };

    Object.values(areas).forEach((ta) => {
        ta.addEventListener('input', schedule);
        ta.addEventListener('focus', () => {
            lastFocused = ta;
            if (variantSel.value !== ta.dataset.variant) { variantSel.value = ta.dataset.variant; refresh(); }
        });
        // Tabulation dans l'éditeur au lieu de changer de champ
        ta.addEventListener('keydown', (e) => {
            if (e.key !== 'Tab') return;
            e.preventDefault();
            ta.setRangeText('  ', ta.selectionStart, ta.selectionEnd, 'end');
            schedule();
        });
    });
    variantSel.addEventListener('change', refresh);

    document.getElementById('variables').addEventListener('click', (e) => {
        const text = e.target.dataset && e.target.dataset.insert;
        if (!text) return;
        lastFocused.focus();
        lastFocused.setRangeText(text, lastFocused.selectionStart, lastFocused.selectionEnd, 'end');
        schedule();
    });

    agentSearch.addEventListener('input', async () => {
        const q = agentSearch.value.trim();
        const match = found.find((a) => a.label === q);
        if (match) { agentId.value = match.id; refresh(); return; }
        if (q.length < 2) return;
        const res = await fetch(@json(route('admin.agents.lookup')) + '?q=' + encodeURIComponent(q), { headers: { 'Accept': 'application/json' } });
        if (!res.ok) return;
        found = await res.json();
        options.replaceChildren(...found.map((a) => Object.assign(document.createElement('option'), { value: a.label })));
    });

    // Prévenir la perte de modifications non enregistrées
    let changed = false;
    document.getElementById('template-form').addEventListener('input', () => { changed = true; });
    document.getElementById('template-form').addEventListener('submit', () => { changed = false; });
    window.addEventListener('beforeunload', (e) => { if (changed) { e.preventDefault(); e.returnValue = ''; } });

    refresh();
})();
</script>
@endpush