package rmq

import (
	"context"
	"github.com/fox/fox/log"
	"github.com/google/uuid"
	"github.com/rabbitmq/amqp091-go"
	"time"
)

const (
	ExchangeDirect = "direct"
	// ExchangeFanout = "fanout"
	ExchangeTopic = "topic"
)

type Rmq struct {
	conn        *amqp091.Connection
	ch          *amqp091.Channel
	consumerTag string
}

// url:amqp://guest:guest@localhost:5672/
func NewRmq(url string) (*Rmq, error) {
	rmq := &Rmq{consumerTag: uuid.NewString()}

	retries := 0
	retryDelay := 1 * time.Second

	var err error
	for {
		rmq.conn, err = amqp091.DialConfig(url, amqp091.Config{Heartbeat: 10 * time.Second})
		if err == nil {
			break
		}
		retries++
		time.Sleep(retryDelay)
		if retryDelay < 30*time.Second {
			retryDelay *= 2
		}
		log.ErrorF("amqp connection failed after %v reconnect.err:%v url:%v", retryDelay, err, url)
	}

	rmq.ch, err = rmq.conn.Channel()
	if err != nil {
		return nil, err
	}
	return rmq, nil
}

func (r *Rmq) Close() {
	if r.conn != nil {
		_ = r.conn.Close()
	}
	if r.ch != nil {
		_ = r.ch.Close()
	}
}

func (r *Rmq) ExchangeDeclare(exchangeName, typ string) error {
	return r.ch.ExchangeDeclare(exchangeName, typ, true, false, false, false, nil)
}

func (r *Rmq) QueueDeclare(queueName string) error {
	_, err := r.ch.QueueDeclare(queueName, false, false, false, false, nil)
	return err
}

func (r *Rmq) QueueDelete(queueName string) error {
	_, err := r.ch.QueueDelete(queueName, false, false, false)
	return err
}

func (r *Rmq) QueueBind(queueName, routerKey, exchangeName string) error {
	return r.ch.QueueBind(queueName, routerKey, exchangeName, false, nil)
}

func (r *Rmq) QueueUnbind(queueName, routerKey, exchangeName string) error {
	return r.ch.QueueUnbind(queueName, routerKey, exchangeName, nil)
}

// 发布消息到交换机，带有指定的路由键
func (r *Rmq) Publish(exchangeName, routerKey string, msg []byte) error {
	return r.ch.Publish(exchangeName, routerKey, true, false, amqp091.Publishing{
		ContentType: "text/plain",
		Body:        msg,
	})
}

// 发布消息到交换机，带有指定的路由键
func (r *Rmq) PublishRpc(d *amqp091.Delivery, msg []byte) error {
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	return r.ch.PublishWithContext(ctx, "", d.ReplyTo, false, false, amqp091.Publishing{
		ContentType:   "text/plain",
		CorrelationId: d.CorrelationId,
		Body:          msg,
	})
}

func (r *Rmq) PublishRaw(exchangeName, routerKey string, data amqp091.Publishing) error {
	return r.ch.Publish(exchangeName, routerKey, true, false, data)
}

func (r *Rmq) Consume(queueName string) (<-chan amqp091.Delivery, error) {
	return r.ch.Consume(queueName, r.consumerTag, true, false, false, false, nil)
}

func (r *Rmq) ConsumeDelete() error {
	return r.ch.Cancel(r.consumerTag, true)
}