package workflow

import (
	"sync"
	"time"
)

// Sequencer handles sequencing of jobs.
//
// It handles the Lifecycle of a Workflow.
//
// When Jobs have no dependencies (defined via After), they are run in parallel.
//
// Sequencer's instance job is to keep track of the order of Jobs and Steps. NOT RUNNING THEM.
//
// Sequencer is thread-safe.
type Sequencer struct {
	queued   Jobs
	finished Jobs

	reports []SequenceReport

	mu sync.Mutex
}

type SequenceReport struct {
	started time.Time
	end     time.Time
	job     Job
	err     error
}