<?php

namespace App\Http\Controllers\Api\V1;

use App\Http\Controllers\Api\Concerns\RespondsWithJson;
use App\Http\Controllers\Controller;
use App\Services\AiChatService;
use App\Support\ApiActor;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Throwable;

class AiChatController extends Controller
{
    use RespondsWithJson;

    public function __construct(
        private readonly AiChatService $aiChat
    ) {
    }

    /**
     * POST /api/v1/ai/chat
     * Body: { "message": "...", "history": [...] }
     */
    public function chat(Request $request): JsonResponse
    {
        if (! $this->aiChat->isAvailable()) {
            return $this->fail('AI service belum dikonfigurasi (OLLAMA_BASE_URL kosong).', 'service_unavailable', 503);
        }

        $validated = $request->validate([
            'message'   => ['required', 'string', 'min:2', 'max:2000'],
            'history'   => ['sometimes', 'array', 'max:20'],
            'history.*.role'    => ['required_with:history', 'string', 'in:user,assistant'],
            'history.*.content' => ['required_with:history', 'string', 'max:4000'],
        ]);

        /** @var ApiActor|null $actor */
        $actor    = $request->attributes->get('api_actor');
        $username = $actor instanceof ApiActor ? $actor->identifier : 'unknown';

        try {
            $result = $this->aiChat->chat(
                query: $validated['message'],
                username: $username,
                displayName: $username,
                jobTitle: '',
                history: $validated['history'] ?? [],
            );

            return $this->ok([
                'answer' => $result['answer'],
                'context_count' => $result['meta']['context_count'],
                'model' => $result['meta']['model'],
            ]);
        } catch (Throwable $e) {
            return $this->fail('Gagal memproses permintaan AI: '.$e->getMessage(), 'server_error', 500);
        }
    }

    /**
     * GET /api/v1/ai/status
     */
    public function status(): JsonResponse
    {
        return $this->ok([
            'available' => $this->aiChat->isAvailable(),
            'base_url'  => config('ollama.base_url') ?: null,
            'model'     => config('ollama.chat_model'),
        ]);
    }
}