package release

import (
	"fmt"
	"reflect"

	"git.badhouseplants.net/allanger/giops/internal/config/repository"
	"git.badhouseplants.net/allanger/giops/internal/lockfile"
	"git.badhouseplants.net/allanger/giops/internal/utils/helmhelper"
	"github.com/sirupsen/logrus"
)

type Release struct {
	// Public fields, that can be set with yaml
	Repository string
	// Release name
	Release string `yaml:"name"`
	// Chart name
	Chart string
	// Chart version
	Version string
	// Namespace to install release
	Namespace string
	// Private fields that should be pupulated during the run-time
	RepositoryObj *repository.Repository `yaml:"-"`
}

type Releases []*Release

// RepositoryObjFromName gather the whole repository object by its name
func (r *Release) RepositoryObjFromName(repos repository.Repositories) error {
	for _, repo := range repos {
		if repo.Name == r.Repository {
			r.RepositoryObj = repo
		}
	}
	if r.RepositoryObj == nil {
		return fmt.Errorf("couldn't gather the RepositoryObj for %s", r.Repository)
	}
	return nil
}

// Possible version placeholders
const (
	VERSION_LATEST = "latest"
)

// Replace the version placeholder with the fixed version
func (r *Release) VersionHandler(dir string, hh helmhelper.Helmhelper) error {
	switch r.Version {
	case VERSION_LATEST:
		version, err := hh.FindLatestVersion(dir, r.Chart, *r.RepositoryObj)
		if err != nil {
			return err
		}
		r.Version = version

	}
	return nil
}

func FindReleaseByNames(releases []string, releasesObj Releases) Releases {
	result := Releases{}
	for _, rObj := range releasesObj {
		for _, r := range releases {
			if rObj.Release == r {
				result = append(result, rObj)
			}
		}
	}
	return result
}

// Helpers
func ReleasesFromLockfile(lockfile lockfile.LockFile, repos repository.Repositories) (Releases, error) {
	releases := Releases{}
	for _, releaseLocked := range lockfile {
		repoName, err := repos.NameByUrl(releaseLocked.RepoUrl)
		if err != nil {
			return releases, err
		}
		release := &Release{
			Repository: repoName,
			Release:    releaseLocked.Release,
			Chart:      releaseLocked.Chart,
			Version:    releaseLocked.Version,
			Namespace:  releaseLocked.Namespace,
		}
		if err := release.RepositoryObjFromName(repos); err != nil {
			return nil, err
		}
		releases = append(releases, release)
	}
	return releases, nil
}

func (r *Release) LockEntry() *lockfile.LockEntry {
	return &lockfile.LockEntry{
		Chart:     r.Chart,
		Release:   r.Release,
		Version:   r.Version,
		Namespace: r.Namespace,
		RepoUrl:   r.RepositoryObj.URL,
		RepoName:  r.RepositoryObj.Name,
	}
}

type Diff struct {
	Added   Releases
	Deleted Releases
	Updated Releases
}

// TODO(@allanger): Naming should be better
func (src Releases) Diff(dest Releases) Diff {
	diff := Diff{}
	for _, rSrc := range src {
		found := false
		for _, rDest := range dest {
			logrus.Infof("comparing %s to %s", rSrc.Release, rDest.Release)
			if rSrc.Release == rDest.Release {
				found = true
				if reflect.DeepEqual(rSrc, rDest) {
					continue
				} else {
					diff.Updated = append(diff.Updated, rDest)
				}
			}
		}
		if !found {
			diff.Deleted = append(diff.Added, rSrc)
		}
	}

	for _, rDest := range dest {
		found := false
		for _, rSrc := range src {
			if rSrc.Release == rDest.Release {
				found = true
				continue
			}
		}
		if !found {
			diff.Added = append(diff.Added, rDest)
		}
	}
	return diff
}

func (rs *Releases) PopulateRepositories(repos repository.Repositories) error {
	for _, r := range *rs {
		if err := r.RepositoryObjFromName(repos); err != nil {
			return err
		}
	}
	return nil
}