@php
    $drug = $drug ?? null;
    $action = $action ?? route('drugs.store');
    $method = $method ?? 'POST';
    $submitLabel = $submitLabel ?? 'Add to formulary';
    $backRoute = $backRoute ?? route('drugs.index');

    // "Not controlled" is what the controller records when the flag is off, not
    // a schedule a prescriber could pick by mistake.
    $scheduleOptions = collect($schedules)->except('none')->all();
    $pregnancyOptions = collect($pregnancyCategories)
        ->mapWithKeys(fn (string $category) => [$category => strtoupper($category)])
        ->all();
@endphp

<div class="grid gap-6 lg:grid-cols-3">
    <div class="space-y-6 lg:col-span-2">
        <form method="POST" action="{{ $action }}" class="space-y-6">
            @csrf
            @if ($method !== 'POST')
                @method($method)
            @endif

            <x-card title="Identity" icon="pill">
                <div class="grid gap-4 sm:grid-cols-2">
                    <x-form.input name="code" label="Formulary code" required
                                  placeholder="e.g. DRG-PARA-500"
                                  :value="old('code', $drug?->code)"
                                  hint="Unique — it is what the pharmacy scanner matches." />
                    <x-form.input name="name" label="Brand or entry name" required
                                  placeholder="e.g. Paracetamol 500"
                                  :value="old('name', $drug?->name)" />
                    <x-form.input name="generic_name" label="Generic name (INN)" required
                                  placeholder="e.g. paracetamol"
                                  :value="old('generic_name', $drug?->generic_name)" />
                    <x-form.input name="brand_name" label="Marketed brand"
                                  placeholder="e.g. Panadol"
                                  :value="old('brand_name', $drug?->brand_name)" />
                </div>
            </x-card>

            <x-card title="How it is written" icon="clipboard-list">
                <div class="grid gap-4 sm:grid-cols-2">
                    <x-form.select name="form" label="Form" :options="$forms" required
                                   :value="old('form', $drug?->form)" />
                    <x-form.input name="strength" label="Strength"
                                  placeholder="e.g. 500 mg"
                                  :value="old('strength', $drug?->strength)" />
                    <x-form.select name="route" label="Default route" :options="$routes" required
                                   :value="old('route', $drug?->route)" />
                    <x-form.input name="default_duration_days" label="Default course (days)" type="number" min="1" max="365"
                                  :value="old('default_duration_days', $drug?->default_duration_days)"
                                  hint="Left blank, the prescriber sets it each time." />
                    <x-form.select name="default_frequency" label="Default frequency" :options="$frequencies"
                                   :value="old('default_frequency', $drug?->default_frequency)"
                                   placeholder="No default" />
                    <div class="grid grid-cols-1 gap-4 sm:grid-cols-3 sm:col-span-2">
                        <x-form.input name="adult_dose" label="Adult dose"
                                      placeholder="e.g. 1–2 tablets"
                                      :value="old('adult_dose', $drug?->adult_dose)" />
                        <x-form.input name="pediatric_dose" label="Paediatric dose"
                                      placeholder="e.g. 15 mg/kg"
                                      :value="old('pediatric_dose', $drug?->pediatric_dose)" />
                        <x-form.input name="max_daily_dose" label="Maximum daily dose"
                                      placeholder="e.g. 4 g"
                                      :value="old('max_daily_dose', $drug?->max_daily_dose)" />
                    </div>
                </div>
            </x-card>

            <x-card title="Safety flags" icon="shield">
                <div class="grid gap-4 sm:grid-cols-2">
                    <div class="space-y-3 rounded-lg border border-slate-200 p-4">
                        <x-form.checkbox name="is_controlled" label="Controlled substance"
                                         hint="Every script naming it is flagged to the controlled register."
                                         :checked="(bool) $drug?->is_controlled" />
                        <x-form.select name="controlled_schedule" label="Schedule" :options="$scheduleOptions"
                                       :value="old('controlled_schedule', $drug?->controlled_schedule)"
                                       placeholder="Choose a schedule…"
                                       hint="Required when the drug is controlled." />
                    </div>

                    <div class="space-y-3 rounded-lg border border-slate-200 p-4">
                        <x-form.checkbox name="is_high_alert" label="High-alert medicine"
                                         hint="Wrong-route or wrong-dose errors carry a high risk of harm."
                                         :checked="(bool) $drug?->is_high_alert" />
                        <x-form.checkbox name="is_essential" label="Essential medicine"
                                         :checked="(bool) $drug?->is_essential" />
                    </div>

                    <div class="space-y-3 rounded-lg border border-slate-200 p-4 sm:col-span-2">
                        <div class="grid gap-4 sm:grid-cols-3">
                            <x-form.select name="pregnancy_category" label="Pregnancy category"
                                           :options="$pregnancyOptions"
                                           :value="old('pregnancy_category', $drug?->pregnancy_category)"
                                           placeholder="Unclassified" />
                            <div class="flex items-center sm:col-span-2">
                                <div class="space-y-3">
                                    <x-form.checkbox name="is_pregnancy_safe" label="Considered safe in pregnancy"
                                                     :checked="(bool) $drug?->is_pregnancy_safe" />
                                    <x-form.checkbox name="is_breastfeeding_safe" label="Considered safe while breastfeeding"
                                                     :checked="(bool) $drug?->is_breastfeeding_safe" />
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </x-card>

            <x-card title="Monograph" icon="book-open">
                <p class="mb-4 text-sm text-slate-500">
                    Reference text the prescriber sees while writing — kept short enough to scan at the point of care.
                </p>
                <div class="grid gap-4 sm:grid-cols-2">
                    <x-form.textarea name="indications" label="Indications" rows="3"
                                     :value="old('indications', $drug?->indications)" />
                    <x-form.textarea name="contraindications" label="Contraindications" rows="3"
                                     :value="old('contraindications', $drug?->contraindications)" />
                    <x-form.textarea name="side_effects" label="Side effects" rows="3"
                                     :value="old('side_effects', $drug?->side_effects)" />
                    <x-form.textarea name="drug_interactions" label="Interactions" rows="3"
                                     :value="old('drug_interactions', $drug?->drug_interactions)" />
                    <x-form.textarea name="precautions" label="Precautions" rows="3"
                                     :value="old('precautions', $drug?->precautions)" />
                </div>
            </x-card>

            <x-card title="Stock link and handling" icon="cube">
                <div class="grid gap-4 sm:grid-cols-2">
                    <x-form.select name="inventory_item_id" label="Shelf item" :options="$items"
                                   :value="old('inventory_item_id', $drug?->inventory_item_id)"
                                   placeholder="Not stocked"
                                   hint="Linking it lets the pharmacy dispense from a batch." />
                    <x-form.input name="storage_conditions" label="Storage conditions"
                                  placeholder="e.g. Below 25 °C, dry"
                                  :value="old('storage_conditions', $drug?->storage_conditions)" />
                    <x-form.input name="prescription_notes" label="Note shown when prescribing"
                                  placeholder="e.g. Take with food"
                                  :value="old('prescription_notes', $drug?->prescription_notes)" />
                    <div class="flex items-center">
                        <x-form.checkbox name="is_active" label="Available for new prescriptions"
                                         :checked="old('is_active', $drug?->is_active ?? true)" />
                    </div>
                </div>
            </x-card>

            <div class="flex items-center justify-end gap-3">
                <a href="{{ $backRoute }}" class="hms-btn-secondary">Cancel</a>
                <button type="submit" class="hms-btn-primary">{{ $submitLabel }}</button>
            </div>
        </form>
    </div>

    <div class="space-y-6">
        <x-card title="What the flags drive" icon="shield-check">
            <ul class="space-y-3 text-sm text-slate-600">
                <li class="flex gap-2">
                    <x-icon name="shield" size="sm" class="mt-0.5 shrink-0 text-red-500" />
                    <span><strong class="font-medium text-slate-800">Controlled</strong> — the script carries a register warning, prints a controlled-drug slip, and the pharmacy dispenses it against the schedule.</span>
                </li>
                <li class="flex gap-2">
                    <x-icon name="exclamation" size="sm" class="mt-0.5 shrink-0 text-amber-500" />
                    <span><strong class="font-medium text-slate-800">High alert</strong> — the prescriber sees the warning while writing the line.</span>
                </li>
                <li class="flex gap-2">
                    <x-icon name="cube" size="sm" class="mt-0.5 shrink-0 text-brand-600" />
                    <span><strong class="font-medium text-slate-800">Shelf item</strong> — without a link the drug can be written but not dispensed from stock; a price can still be entered at the counter.</span>
                </li>
            </ul>
        </x-card>

        <x-card title="Before you retire an entry" icon="info">
            <p class="text-sm text-slate-600">
                Retiring a drug keeps every past script readable — the lines hold the name as written. Existing
                prescriptions finish dispensing; only new lines stop naming it.
            </p>
        </x-card>
    </div>
</div>