package rpc

import (
	"context"

	bin "github.com/dfuse-io/binary"
)

// GetEpochSchedule returns epoch schedule information from this cluster's genesis config.
func (cl *Client) GetEpochSchedule(ctx context.Context) (out *GetEpochScheduleResult, err error) {
	err = cl.rpcClient.CallForInto(ctx, &out, "getEpochSchedule", nil)
	return
}

type GetEpochScheduleResult struct {
	// The maximum number of slots in each epoch.
	SlotsPerEpoch bin.Uint64 `json:"slotsPerEpoch"`

	// The number of slots before beginning of an epoch to calculate a leader schedule for that epoch.
	LeaderScheduleSlotOffset bin.Uint64 `json:"leaderScheduleSlotOffset"`

	// Whether epochs start short and grow.
	Warmup bool `json:"warmup"`

	// First normal-length epoch, log2(slotsPerEpoch) - log2(MINIMUM_SLOTS_PER_EPOCH)
	FirstNormalEpoch bin.Uint64 `json:"firstNormalEpoch"`

	// MINIMUM_SLOTS_PER_EPOCH * (2.pow(firstNormalEpoch) - 1)
	FirstNormalSlot bin.Uint64 `json:"firstNormalSlot"`
}