<?php

declare(strict_types=1);

namespace Core\Mod\Agentic\Mcp\Tools\Agent\Session;

use Core\Mod\Agentic\Services\AgentSessionService;
use Core\Mod\Agentic\Mcp\Tools\Agent\AgentTool;

/**
 * Continue from a previous session (multi-agent handoff).
 */
class SessionContinue extends AgentTool
{
    protected string $category = 'session';

    protected array $scopes = ['write'];

    public function name(): string
    {
        return 'session_continue';
    }

    public function description(): string
    {
        return 'Continue from a previous session (multi-agent handoff)';
    }

    public function inputSchema(): array
    {
        return [
            'type' => 'object',
            'properties' => [
                'previous_session_id' => [
                    'type' => 'string',
                    'description' => 'Session ID to continue from',
                ],
                'agent_type' => [
                    'type' => 'string',
                    'description' => 'New agent type taking over',
                ],
            ],
            'required' => ['previous_session_id', 'agent_type'],
        ];
    }

    public function handle(array $args, array $context = []): array
    {
        try {
            $previousSessionId = $this->require($args, 'previous_session_id');
            $agentType = $this->require($args, 'agent_type');
        } catch (\InvalidArgumentException $e) {
            return $this->error($e->getMessage());
        }

        $sessionService = app(AgentSessionService::class);
        $session = $sessionService->continueFrom($previousSessionId, $agentType);

        if (! $session) {
            return $this->error("Previous session not found: {$previousSessionId}");
        }

        $inheritedContext = $session->context_summary ?? [];

        return $this->success([
            'session' => [
                'session_id' => $session->session_id,
                'agent_type' => $session->agent_type,
                'status' => $session->status,
                'plan' => $session->plan?->slug,
            ],
            'continued_from' => $inheritedContext['continued_from'] ?? null,
            'previous_agent' => $inheritedContext['previous_agent'] ?? null,
            'handoff_notes' => $inheritedContext['handoff_notes'] ?? null,
            'inherited_context' => $inheritedContext['inherited_context'] ?? null,
        ]);
    }
}