package run

import (
	"fmt"
	"strings"

	"github.com/databricks/cli/bundle/config/resources"
	"github.com/databricks/databricks-sdk-go/service/pipelines"
	flag "github.com/spf13/pflag"
)

// PipelineOptions defines options for running a pipeline update.
type PipelineOptions struct {
	// Perform a full graph update.
	RefreshAll bool

	// List of tables to update.
	Refresh []string

	// Perform a full graph reset and recompute.
	FullRefreshAll bool

	// List of tables to reset and recompute.
	FullRefresh []string

	// Perform an update to validate graph correctness.
	ValidateOnly bool
}

func (o *PipelineOptions) Define(fs *flag.FlagSet) {
	fs.BoolVar(&o.RefreshAll, "refresh-all", false, "Perform a full graph update.")
	fs.StringSliceVar(&o.Refresh, "refresh", nil, "List of tables to update.")
	fs.BoolVar(&o.FullRefreshAll, "full-refresh-all", false, "Perform a full graph reset and recompute.")
	fs.StringSliceVar(&o.FullRefresh, "full-refresh", nil, "List of tables to reset and recompute.")
	fs.BoolVar(&o.ValidateOnly, "validate-only", false, "Perform an update to validate graph correctness.")
}

// Validate returns if the combination of options is valid.
func (o *PipelineOptions) Validate(pipeline *resources.Pipeline) error {
	set := []string{}
	if o.RefreshAll {
		set = append(set, "--refresh-all")
	}
	if len(o.Refresh) > 0 {
		set = append(set, "--refresh")
	}
	if o.FullRefreshAll {
		set = append(set, "--full-refresh-all")
	}
	if len(o.FullRefresh) > 0 {
		set = append(set, "--full-refresh")
	}
	if o.ValidateOnly {
		set = append(set, "--validate-only")
	}
	if len(set) > 1 {
		return fmt.Errorf("pipeline run arguments are mutually exclusive (got %s)", strings.Join(set, ", "))
	}
	return nil
}

func (o *PipelineOptions) toPayload(pipeline *resources.Pipeline, pipelineID string) (*pipelines.StartUpdate, error) {
	if err := o.Validate(pipeline); err != nil {
		return nil, err
	}
	payload := &pipelines.StartUpdate{
		PipelineId: pipelineID,

		// Note: `RefreshAll` is implied if the fields below are not set.
		RefreshSelection:     o.Refresh,
		FullRefresh:          o.FullRefreshAll,
		FullRefreshSelection: o.FullRefresh,
		ValidateOnly:         o.ValidateOnly,
	}
	return payload, nil
}