<?php

namespace App\Http\Controllers\Link;

use App\Http\Controllers\Controller;
use App\Models\LinkWallet;
use App\Models\ShortLink;
use App\Services\Afia\AfiaService;
use App\Services\Billing\BillingClient;
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'];
        }

        $links = $account->shortLinks();

        $ctx = [
            'signed_in' => 'yes',
            'links_total' => (clone $links)->count(),
            'links_active' => (clone $links)->where('is_active', true)->count(),
            'clicks_total' => (int) (clone $links)->sum('clicks_total'),
            'custom_domains' => $account->linkCustomDomains()->count(),
            'price_per_link_ghs' => number_format(LinkWallet::pricePerLink(), 2),
            'default_public_domain' => (string) config('link.public_domain', 'ladl.link'),
        ];

        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->shortLinks()
            ->latest('updated_at')
            ->limit(3)
            ->get(['slug', 'label', 'clicks_total', 'source_app', 'is_managed_here']);

        if ($recent->isNotEmpty()) {
            $ctx['recent_links'] = $recent->map(fn (ShortLink $link): string => sprintf(
                '%s → %s (%d clicks%s)',
                $link->label ?: $link->slug,
                $link->publicUrl($account),
                $link->clicks_total,
                $link->is_managed_here ? '' : ', managed in '.$link->sourceAppLabel(),
            ))->implode('; ');
        }

        return $ctx;
    }
}