// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0

package api

import (
	"context"
	"net/http"
	"time"
)

func (c *Sys) Leader() (*LeaderResponse, error) {
	return c.LeaderWithContext(context.Background())
}

func (c *Sys) LeaderWithContext(ctx context.Context) (*LeaderResponse, error) {
	ctx, cancelFunc := c.c.withConfiguredTimeout(ctx)
	defer cancelFunc()

	r := c.c.NewRequest(http.MethodGet, "/v1/sys/leader")

	resp, err := c.c.rawRequestWithContext(ctx, r)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()

	var result LeaderResponse
	err = resp.DecodeJSON(&result)
	return &result, err
}

type LeaderResponse struct {
	HAEnabled                bool      `json:"ha_enabled"`
	IsSelf                   bool      `json:"is_self"`
	ActiveTime               time.Time `json:"active_time"`
	LeaderAddress            string    `json:"leader_address"`
	LeaderClusterAddress     string    `json:"leader_cluster_address"`
	PerfStandby              bool      `json:"performance_standby"`
	PerfStandbyLastRemoteWAL uint64    `json:"performance_standby_last_remote_wal"`
	LastWAL                  uint64    `json:"last_wal"`
	RaftCommittedIndex       uint64    `json:"raft_committed_index,omitempty"`
	RaftAppliedIndex         uint64    `json:"raft_applied_index,omitempty"`
}