<?php

namespace App\Services\Agent;

final class ProviderEvent
{
    /**
     * @param array<string, mixed> $payload
     */
    public function __construct(
        public ProviderEventType $type,
        public array $payload = [],
    ) {
    }

    public static function messageDelta(string $text): self
    {
        return new self(ProviderEventType::MessageDelta, ['text' => $text]);
    }

    /**
     * @param array<string, mixed> $payload
     */
    public static function toolCall(array $payload): self
    {
        return new self(ProviderEventType::ToolCall, $payload);
    }

    /**
     * @param array<string, mixed> $payload
     */
    public static function toolDelta(array $payload): self
    {
        return new self(ProviderEventType::ToolDelta, $payload);
    }

    /**
     * @param array<string, mixed> $usage
     */
    public static function usage(array $usage): self
    {
        return new self(ProviderEventType::Usage, $usage);
    }

    public static function done(?string $reason = null): self
    {
        return new self(ProviderEventType::Done, ['reason' => $reason]);
    }

    /**
     * @param array<string, mixed> $meta
     */
    public static function error(string $code, string $message, array $meta = []): self
    {
        return new self(ProviderEventType::Error, array_merge([
            'code' => $code,
            'message' => $message,
        ], $meta));
    }
}