// Package event ...
//
// Description : event ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2024-07-17 11:21
package event

import (
	"context"
	"errors"
	"fmt"
	"git.zhangdeman.cn/zhangdeman/consts"
	"git.zhangdeman.cn/zhangdeman/event/abstract"
	"git.zhangdeman.cn/zhangdeman/event/define"
)

var (
	MemoryEventClient abstract.IEvent
)

// InitMemoryEvent 初始化事件实例
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 11:24 2024/7/17
func InitMemoryEvent(cfg *define.MemoryEventConfig) {
	instance := &MemoryEvent{
		base: &base{
			panicCallback:     define.DefaultPanicCallback,
			parseFailCallback: define.DefaultParseFailCallbackFunc,
		},
	}
	instance.Init(cfg)
	MemoryEventClient = instance
}

// MemoryEvent 基于内存实现的消息队列(仅适用于单机)
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 11:22 2024/7/17
type MemoryEvent struct {
	*base
	cfg            *define.MemoryEventConfig
	messageChannel chan *define.EventData
}

// SendEvent 发送事件
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 12:28 2024/7/17
func (m *MemoryEvent) SendEvent(ctx context.Context, eventData *define.EventData) (*define.SendResult, error) {
	if nil == eventData {
		return nil, errors.New("event data is nil")
	}
	m.messageChannel <- eventData
	return &define.SendResult{
		Data:       eventData,
		Partition:  0,
		Topic:      "",
		IsSuccess:  true,
		FailReason: "success",
		Extension:  nil,
	}, nil
}

// SendEventAsync 异步发送事件
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 12:29 2024/7/17
func (m *MemoryEvent) SendEventAsync(ctx context.Context, eventData *define.EventData, sendSuccessCallback abstract.SendSuccessCallback, sendFailCallback abstract.SendFailCallback) {
	if nil == sendFailCallback {
		sendFailCallback = define.DefaultSendFailCallback
	}
	if nil == sendSuccessCallback {
		sendSuccessCallback = define.DefaultSendSuccessCallback
	}
	go func() {
		var (
			res *define.SendResult
			err error
		)
		defer func() {
			if r := recover(); nil != r {
				m.panicCallback(err, eventData, map[string]any{
					"send_result": res,
				})
			}
		}()
		res, err = m.SendEvent(ctx, eventData)

		if nil != err {
			sendFailCallback(ctx, eventData, res, err)
			return
		} else {
			sendSuccessCallback(ctx, res)
		}
	}()
}

// GetConsumeEventChan 消费的消息chan
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 12:41 2024/7/17
func (m *MemoryEvent) GetConsumeEventChan() (<-chan *define.EventData, error) {
	return m.messageChannel, nil
}

// ConsumeEvent 消费事件
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 14:14 2024/7/17
func (m *MemoryEvent) ConsumeEvent(handler abstract.EventHandler, successCallback abstract.ConsumeSuccessCallback, failureCallback abstract.ConsumeFailCallbackHandler) error {
	messageChan, _ := m.GetConsumeEventChan()
	if nil == successCallback {
		successCallback = define.DefaultSuccessCallbackHandler
	}
	if nil == failureCallback {
		failureCallback = define.DefaultFailCallbackHandler
	}
	go func() {
		defer func() {
			if r := recover(); nil != r {
				fmt.Println("出现异常", r)
			}
		}()
		for eventData := range messageChan {
			var (
				err          error
				handleResult map[string]any
			)
			if handleResult, err = handler(eventData); nil != err {
				failureCallback(eventData, handleResult, err)
			} else {
				successCallback(eventData, handleResult)
			}
		}
	}()

	return nil
}

// Destroy 实例销毁
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 14:17 2024/7/17
func (m *MemoryEvent) Destroy() {
	return
}

func (m *MemoryEvent) DriverType() string {
	return consts.EventDriverMemory
}

// Init 初始化
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 12:08 2024/7/17
func (m *MemoryEvent) Init(cfg *define.MemoryEventConfig) {
	if nil == cfg {
		cfg = &define.MemoryEventConfig{}
	}
	if cfg.MessageBufferSize <= 0 {
		cfg.MessageBufferSize = define.DefaultMemoryChannelSize
	}
	if cfg.CloseMaxWaitTime <= 0 {
		cfg.CloseMaxWaitTime = define.DefaultMemoryCloseMaxWaitTime
	}
	m.cfg = cfg
	// 初始化内存 channel
	m.messageChannel = make(chan *define.EventData, cfg.MessageBufferSize)
}