package common

import "github.com/prometheus/client_golang/prometheus"

// PrometheusMetrics is a list of collected Prometheus Counters and Guages that will be exported
type PrometheusMetrics struct {
	LatestBlockCounter           prometheus.Counter
	TotalBlocksServedConter      prometheus.Counter
	SendTransactionsCounter      prometheus.Counter
	TotalErrors                  prometheus.Counter
	TotalSaplingParamsCounter    prometheus.Counter
	TotalSproutParamsCounter     prometheus.Counter
	MempoolClientsGauge          prometheus.Gauge
	ZecPriceGauge                prometheus.Gauge
	ZecPriceHistoryWebAPICounter prometheus.Counter
	ZecPriceHistoryErrors        prometheus.Counter
}

func GetPrometheusMetrics() *PrometheusMetrics {
	if Metrics != nil {
		return Metrics
	}

	// Create the metrics container
	m := &PrometheusMetrics{}
	m.LatestBlockCounter = prometheus.NewCounter(prometheus.CounterOpts{
		Name: "lightwalletd_get_latest_block",
		Help: "Number of times GetLatestBlock was called",
	})

	m.TotalBlocksServedConter = prometheus.NewCounter(prometheus.CounterOpts{
		Name: "lightwalletd_total_blocks_served",
		Help: "Total number of blocks served by lightwalletd",
	})

	m.SendTransactionsCounter = prometheus.NewCounter(prometheus.CounterOpts{
		Name: "lightwalletd_total_send_transactions",
		Help: "Total number of transactions broadcasted by lightwalletd",
	})

	m.TotalErrors = prometheus.NewCounter(prometheus.CounterOpts{
		Name: "lightwalletd_total_errors",
		Help: "Total number of errors seen by lightwalletd",
	})

	m.TotalSaplingParamsCounter = prometheus.NewCounter(prometheus.CounterOpts{
		Name: "params_sapling_total",
		Help: "Total number of params downloads for sapling params",
	})

	m.TotalSproutParamsCounter = prometheus.NewCounter(prometheus.CounterOpts{
		Name: "params_sprout_total",
		Help: "Total number of params downloasd for sprout params",
	})

	m.MempoolClientsGauge = prometheus.NewGauge(prometheus.GaugeOpts{
		Name: "mempool_clients",
		Help: "Number of concurrent mempool clients",
	})

	m.ZecPriceGauge = prometheus.NewGauge(prometheus.GaugeOpts{
		Name: "zec_price",
		Help: "Current price of Zec",
	})

	m.ZecPriceHistoryWebAPICounter = prometheus.NewCounter(prometheus.CounterOpts{
		Name: "zec_price_history_api_counter",
		Help: "Counter of number of successful API calls to history API",
	})

	m.ZecPriceHistoryErrors = prometheus.NewCounter(prometheus.CounterOpts{
		Name: "zec_price_history_errors",
		Help: "Counter for number of errors seen in the history price API",
	})

	return m
}