@extends('layouts.app')
@section('header_title', 'POS Diagnostic Billing Terminal')
@section('content')
<div class="grid grid-cols-1 lg:grid-cols-3 gap-8" x-data="{
    patient_id: 1,
    selectedTests: [
        { id: 1, code: 'HEM-CBC', name: 'Complete Blood Count (CBC)', price: 8500, qty: 1 }
    ],
    discount: 0,
    get subtotal() { return this.selectedTests.reduce((acc, t) => acc + (t.price * t.qty), 0); },
    get vat() { return Math.round(this.subtotal * 0.075); },
    get total() { return this.subtotal + this.vat - this.discount; },
    removeTest(index) { this.selectedTests.splice(index, 1); },
    addTest(test) {
        let existing = this.selectedTests.find(t => t.id === test.id);
        if (existing) existing.qty++;
        else this.selectedTests.push({ id: test.id, code: test.test_code, name: test.test_name, price: Number(test.selling_price), qty: 1 });
    }
}">
    <!-- Catalog Picker -->
    <div class="lg:col-span-2 bg-white rounded-2xl shadow-sm border p-6 flex flex-col">
        <div class="flex items-center justify-between mb-6">
            <h3 class="font-bold text-[#060453] text-lg">🧪 Laboratory Test Catalog</h3>
            <input type="text" placeholder="Search test name or code..." class="p-2.5 border rounded-xl bg-gray-50 text-sm w-64 focus:bg-white">
        </div>
        <div class="grid grid-cols-1 md:grid-cols-2 gap-4 flex-1 overflow-auto">
            @foreach($tests as $test)
            <div @click="addTest({{ $test->toJson() }})" class="p-4 rounded-xl border bg-gray-50 hover:bg-indigo-50/50 hover:border-[#060453] transition cursor-pointer flex items-center justify-between">
                <div>
                    <span class="text-xs font-bold px-2 py-0.5 rounded bg-[#060453] text-white">{{ $test->test_code }}</span>
                    <h4 class="font-bold text-sm text-[#060453] mt-1.5">{{ $test->test_name }}</h4>
                    <p class="text-xs text-gray-400">Sample: {{ $test->sample_type }}</p>
                </div>
                <div class="text-right">
                    <span class="font-black text-base text-[#c9261a]">₦{{ number_format($test->selling_price, 2) }}</span>
                    <div class="text-[10px] text-green-600 font-semibold">+ Reagent Recipe Active</div>
                </div>
            </div>
            @endforeach
        </div>
    </div>

    <!-- POS Cart / Bill Summary -->
    <div class="bg-white rounded-2xl shadow-sm border p-6 flex flex-col justify-between">
        <div>
            <h3 class="font-bold text-[#060453] text-lg border-b pb-4 mb-4">💳 Current Invoice Cart</h3>
            <div class="mb-4">
                <label class="block text-xs font-bold text-gray-500 uppercase mb-1">Select Patient</label>
                <select x-model="patient_id" class="w-full p-2.5 border rounded-xl bg-gray-50 text-sm font-semibold">
                    @foreach($patients as $patient)
                    <option value="{{ $patient->id }}">{{ $patient->full_name }} ({{ $patient->patient_code }})</option>
                    @endforeach
                </select>
            </div>
            <div class="space-y-3 mb-6 max-h-64 overflow-auto">
                <template x-for="(t, idx) in selectedTests" :key="t.id">
                    <div class="p-3 bg-gray-50 rounded-xl border flex items-center justify-between text-sm">
                        <div class="flex-1">
                            <div class="font-bold text-[#060453]" x-text="t.name"></div>
                            <div class="text-xs text-gray-500">₦<span x-text="t.price"></span> x <span x-text="t.qty"></span></div>
                        </div>
                        <div class="flex items-center gap-2">
                            <span class="font-black text-[#c9261a]">₦<span x-text="t.price * t.qty"></span></span>
                            <button @click="removeTest(idx)" class="text-gray-400 hover:text-red-500">✕</button>
                        </div>
                    </div>
                </template>
            </div>
        </div>

        <div class="border-t pt-4 space-y-2 text-sm font-semibold text-gray-600">
            <div class="flex justify-between"><span>Subtotal:</span> <span>₦<span x-text="subtotal"></span></span></div>
            <div class="flex justify-between"><span>VAT (7.5%):</span> <span>₦<span x-text="vat"></span></span></div>
            <div class="flex justify-between text-base font-black text-[#060453] pt-2 border-t">
                <span>Total Due:</span> <span class="text-[#c9261a]">₦<span x-text="total"></span></span>
            </div>
            <button onclick="alert('POS Invoice Committed! Reagent automated deduction triggered.')" class="w-full bg-[#060453] text-white py-3.5 rounded-xl font-bold hover:bg-[#04033a] transition shadow-lg mt-4 text-base">
                Commit POS Invoice & Deduct Stock ⚡
            </button>
        </div>
    </div>
</div>
@endsection