<?php

namespace App\Http\Livewire\Chat;

use App\Models\ChatContact;
use App\Models\ChatConversation;
use App\Models\ChatMessage;
use App\Services\ChatBotEngine;
use Livewire\Component;

class PublicChat extends Component
{
    public string $paso      = 'telefono'; // 'telefono' | 'chat'
    public string $telefono  = '';
    public string $nombre    = '';
    public string $input     = '';
    public array  $mensajes  = [];
    public ?int   $convId    = null;
    public string $estadoConv = 'bot';

    public function iniciar()
    {
        $this->validate([
            'telefono' => 'required|min:7|max:20',
            'nombre'   => 'nullable|max:80',
        ]);

        $contact = ChatContact::firstOrCreate(
            ['canal' => 'web', 'canal_id' => $this->telefono],
            ['nombre' => $this->nombre ?: $this->telefono, 'telefono' => $this->telefono]
        );

        if ($this->nombre && $contact->nombre !== $this->nombre) {
            $contact->update(['nombre' => $this->nombre]);
        }

        $conv = $contact->activeConversation();

        if (! $conv) {
            // Primera vez — el engine inicia el flujo con "hola"
            $engine = new ChatBotEngine();
            $engine->handle('web', $this->telefono, 'hola', $contact->nombre);
            $contact->refresh();
            $conv = $contact->activeConversation();
        }

        if ($conv) {
            $this->convId     = $conv->id;
            $this->estadoConv = $conv->estado;
            $this->cargarMensajes();
        }

        $this->paso = 'chat';
    }

    public function enviar()
    {
        if (! $this->convId || trim($this->input) === '') {
            return;
        }

        $texto       = trim($this->input);
        $this->input = '';

        $engine = new ChatBotEngine();
        $engine->handle('web', $this->telefono, $texto, $this->nombre ?: $this->telefono);

        $conv = ChatConversation::find($this->convId);
        if ($conv) {
            $this->estadoConv = $conv->fresh()->estado;
        }

        $this->cargarMensajes();
        // scroll ya se dispara desde cargarMensajes()
    }

    public function cargarMensajes()
    {
        if (! $this->convId) {
            return;
        }

        $this->mensajes = ChatMessage::where('conversation_id', $this->convId)
            ->orderBy('id')
            ->get()
            ->map(fn($m) => [
                'tipo'       => $m->tipo,
                'contenido'  => $m->contenido,
                'created_at' => $m->created_at->format('H:i'),
            ])
            ->toArray();

        $this->dispatchBrowserEvent('scroll-chat');
    }

    public function render()
    {
        return view('livewire.chat.public-chat');
    }
}