<?php

namespace app\flow\context\bean;

use app\flow\enum\DbOperationType;

/**
 * 执行结果值对象
 * 封装流程执行的结果状态（不可变）
 */
readonly class ExecutionResult
{
    public function __construct(
        /** 流程执行是否成功 */
        public bool $success = true,
        /** 是否需要操作数据库 */
        public bool $needDatabaseOperation = false,
        /** 数据库操作类型列表 */
        public array $dbOperations = [],
        /** 是否需要发送WebSocket通知 */
        public bool $needWebSocketNotify = false,
        /** 跳过节点数量 */
        public int $skipNodeCount = 0,
    ) {}

    /**
     * 创建成功状态
     */
    public static function success(): self
    {
        return new self(success: true);
    }

    /**
     * 创建失败状态
     */
    public static function failure(): self
    {
        return new self(success: false);
    }

    /**
     * 创建需要写库的状态
     */
    public static function withDbOperation(DbOperationType $operation): self
    {
        return new self(
            success: true,
            needDatabaseOperation: true,
            dbOperations: [$operation]
        );
    }

    /**
     * 添加数据库操作
     */
    public function addDbOperation(DbOperationType $operation): self
    {
        return new self(
            success: $this->success,
            needDatabaseOperation: true,
            dbOperations: [...$this->dbOperations, $operation],
            needWebSocketNotify: $this->needWebSocketNotify,
            skipNodeCount: $this->skipNodeCount
        );
    }

    /**
     * 设置为失败
     */
    public function fail(): self
    {
        return new self(
            success: false,
            needDatabaseOperation: $this->needDatabaseOperation,
            dbOperations: $this->dbOperations,
            needWebSocketNotify: $this->needWebSocketNotify,
            skipNodeCount: $this->skipNodeCount
        );
    }

    /**
     * 设置需要WebSocket通知
     */
    public function withWebSocketNotify(bool $need = true): self
    {
        return new self(
            success: $this->success,
            needDatabaseOperation: $this->needDatabaseOperation,
            dbOperations: $this->dbOperations,
            needWebSocketNotify: $need,
            skipNodeCount: $this->skipNodeCount
        );
    }

    /**
     * 设置跳过节点数
     */
    public function withSkipNodeCount(int $count): self
    {
        return new self(
            success: $this->success,
            needDatabaseOperation: $this->needDatabaseOperation,
            dbOperations: $this->dbOperations,
            needWebSocketNotify: $this->needWebSocketNotify,
            skipNodeCount: $count
        );
    }

    /**
     * 是否有数据库操作
     */
    public function hasDbOperations(): bool
    {
        return !empty($this->dbOperations);
    }

    /**
     * 获取数据库操作类型名称列表
     */
    public function getDbOperationNames(): array
    {
        return array_map(fn(DbOperationType $op) => $op->name, $this->dbOperations);
    }

    /**
     * 转换为数组
     */
    public function toArray(): array
    {
        return [
            'success' => $this->success,
            'needDatabaseOperation' => $this->needDatabaseOperation,
            'dbOperations' => $this->getDbOperationNames(),
            'needWebSocketNotify' => $this->needWebSocketNotify,
            'skipNodeCount' => $this->skipNodeCount,
        ];
    }
}