<?php

namespace App\Http\Controllers\Qr;

use App\Http\Controllers\Controller;
use App\Models\QrCode;
use App\Services\Afia\AfiaService;
use App\Services\Billing\BillingClient;
use App\Support\Qr\QrTypeCatalog;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class AfiaController extends Controller
{
    public function chat(Request $request, AfiaService $afia): JsonResponse
    {
        $validated = $request->validate([
            'message' => ['required', 'string', 'max:2000'],
            'history' => ['nullable', 'array', 'max:20'],
            'history.*.role' => ['nullable', 'string'],
            'history.*.text' => ['nullable', 'string'],
        ]);

        if (! $afia->enabled()) {
            return response()->json(['message' => 'Afia is not available right now.'], 503);
        }

        try {
            $reply = $afia->chat(trim($validated['message']), $validated['history'] ?? [], $this->context());
        } catch (\Throwable $e) {
            report($e);

            return response()->json(['message' => 'Afia could not respond right now. Please try again.'], 502);
        }

        return response()->json(['reply' => $reply]);
    }

    /** @return array<string,mixed> */
    private function context(): array
    {
        $account = ladill_account();

        if (! $account) {
            return ['signed_in' => 'no'];
        }

        $types = QrTypeCatalog::storefrontTypes();
        $codes = $account->qrCodes()->whereIn('type', $types);

        $ctx = [
            'signed_in' => 'yes',
            'qr_codes_total' => (clone $codes)->count(),
            'qr_codes_active' => (clone $codes)->where('is_active', true)->count(),
            'scans_total' => (int) (clone $codes)->sum('scans_total'),
            'top_code_type' => (clone $codes)
                ->selectRaw('type, count(*) as total')
                ->groupBy('type')
                ->orderByDesc('total')
                ->value('type') ?: 'none yet',
        ];

        if ($account->public_id) {
            try {
                $ctx['wallet_balance_ghs'] = number_format(app(BillingClient::class)->balanceMinor((string) $account->public_id) / 100, 2);
            } catch (\Throwable) {
            }
        }

        $recent = $account->qrCodes()
            ->whereIn('type', $types)
            ->latest('updated_at')
            ->limit(3)
            ->get(['type', 'label', 'short_code', 'scans_total']);

        if ($recent->isNotEmpty()) {
            $ctx['recent_codes'] = $recent->map(fn (QrCode $code): string => sprintf(
                '%s (%s, %d scans)',
                $code->label ?: $code->short_code,
                QrTypeCatalog::label($code->type),
                $code->scans_total,
            ))->implode('; ');
        }

        return $ctx;
    }
}