package artifacts

import (
	"context"
	"fmt"

	"github.com/databricks/cli/bundle"
	"github.com/databricks/cli/bundle/artifacts/whl"
	"github.com/databricks/cli/bundle/config"
	"github.com/databricks/cli/bundle/config/mutator"
	"github.com/databricks/cli/libs/cmdio"
	"github.com/databricks/cli/libs/diag"
	"github.com/databricks/cli/libs/log"
)

type mutatorFactory = func(name string) bundle.Mutator

var buildMutators map[config.ArtifactType]mutatorFactory = map[config.ArtifactType]mutatorFactory{
	config.ArtifactPythonWheel: whl.Build,
}

var prepareMutators map[config.ArtifactType]mutatorFactory = map[config.ArtifactType]mutatorFactory{
	config.ArtifactPythonWheel: whl.Prepare,
}

func getBuildMutator(t config.ArtifactType, name string) bundle.Mutator {
	mutatorFactory, ok := buildMutators[t]
	if !ok {
		mutatorFactory = BasicBuild
	}

	return mutatorFactory(name)
}

func getPrepareMutator(t config.ArtifactType, name string) bundle.Mutator {
	mutatorFactory, ok := prepareMutators[t]
	if !ok {
		mutatorFactory = func(_ string) bundle.Mutator {
			return mutator.NoOp()
		}
	}

	return mutatorFactory(name)
}

// Basic Build defines a general build mutator which builds artifact based on artifact.BuildCommand
type basicBuild struct {
	name string
}

func BasicBuild(name string) bundle.Mutator {
	return &basicBuild{name: name}
}

func (m *basicBuild) Name() string {
	return fmt.Sprintf("artifacts.Build(%s)", m.name)
}

func (m *basicBuild) Apply(ctx context.Context, b *bundle.Bundle) diag.Diagnostics {
	artifact, ok := b.Config.Artifacts[m.name]
	if !ok {
		return diag.Errorf("artifact doesn't exist: %s", m.name)
	}

	cmdio.LogString(ctx, fmt.Sprintf("Building %s...", m.name))

	out, err := artifact.Build(ctx)
	if err != nil {
		return diag.Errorf("build for %s failed, error: %v, output: %s", m.name, err, out)
	}
	log.Infof(ctx, "Build succeeded")

	return nil
}