package controller

import (
	"context"
	"fmt"
	"path/filepath"

	"git.badhouseplants.net/allanger/shoebill/internal/providers"
	"git.badhouseplants.net/allanger/shoebill/internal/utils/diff"
	"git.badhouseplants.net/allanger/shoebill/internal/utils/githelper"
	"git.badhouseplants.net/allanger/shoebill/internal/utils/helmhelper"
	"git.badhouseplants.net/allanger/shoebill/internal/utils/kustomize"
	"git.badhouseplants.net/allanger/shoebill/internal/utils/sopshelper"
	"git.badhouseplants.net/allanger/shoebill/internal/utils/workdir"
	"git.badhouseplants.net/allanger/shoebill/pkg/config"
	"git.badhouseplants.net/allanger/shoebill/pkg/lockfile"
	"git.badhouseplants.net/allanger/shoebill/pkg/release"
	"github.com/go-logr/logr"
)

func ReadTheConfig(path string) (*config.Config, error) {
	conf, err := config.NewConfigFromFile(path)
	if err != nil {
		return nil, err
	}
	return conf, nil
}

type SyncOptions struct {
	Workdir string
	SSHKey  string
	Dry     bool
	Config  *config.Config
	SopsBin string
}

type SyncController struct{}

func Sync(ctx context.Context, opts *SyncOptions) error {
	log, err := logr.FromContext(ctx)
	if err != nil {
		return err
	}

	// Start by creating a directory where everything should be happening
	configPath := filepath.Dir(opts.Config.ConfigPath)
	// Prepare helm repositories
	for _, repository := range opts.Config.Repositories {
		if err := repository.KindFromUrl(); err != nil {
			return err
		}
	}

	// Configure a git client
	gh := githelper.NewGit(opts.SSHKey)
	// if len(diffArg) > 0 {
	// snapshotDir := fmt.Sprint("%s/.snapshot", workdirPath)
	// cloneSnapshoot(gh, snapshotDir, diffArg)
	// }

	// The main logic starts here
	for _, cluster := range opts.Config.Clusters {
		// Create a dir for the cluster git repo
		clusterWorkdirPath := fmt.Sprintf("%s/%s", opts.Workdir, cluster.Name)

		// Init a gitops provider (Currently onle flux is supported)
		provider, err := providers.NewProvider(cluster.Provider, clusterWorkdirPath, opts.SopsBin, gh)
		if err != nil {
			return err
		}

		if err := cluster.CloneRepo(gh, clusterWorkdirPath, opts.Dry); err != nil {
			return err
		}

		if err := cluster.BootstrapRepo(gh, clusterWorkdirPath, opts.Dry); err != nil {
			return err
		}

		// Read the lockfile generated by the shoebill
		lockfileData, err := lockfile.NewFromFile(clusterWorkdirPath)
		if err != nil {
			return err
		}

		currentRepositories, err := lockfileData.ReposFromLockfile()
		if err != nil {
			return err
		}

		if err := opts.Config.Releases.PopulateRepositories(opts.Config.Repositories); err != nil {
			return err
		}

		// Init the helm client
		hh := helmhelper.NewHelm()

		// Init the sops client
		sops := sopshelper.NewSops()

		for _, release := range opts.Config.Releases {
			err := release.VersionHandler(opts.Workdir, hh)
			if err != nil {
				return err
			}

			if err := release.ValuesHandler(configPath); err != nil {
				return err
			}

			if err := release.SecretsHandler(configPath, sops); err != nil {
				return err
			}
		}

		releaseObj := release.FindReleaseByNames(cluster.Releases, opts.Config.Releases)
		cluster.PopulateReleases(releaseObj)
		for _, oneRelease := range releaseObj {
			log.Info("Pullin a helm chart to the git repo", "chart", oneRelease.Chart)
			if _, err := hh.PullChart(clusterWorkdirPath, oneRelease.ToHelmReleaseData()); err != nil {
				return err
			}
		}
		releasesCurrent, err := release.ReleasesFromLockfile(lockfileData, opts.Config.Repositories)
		if err != nil {
			return err
		}

		// Compare releases from the lockfile to ones from the current cluster config
		diffReleases, err := diff.DiffReleases(releasesCurrent, cluster.ReleasesObj)
		if err != nil {
			return err
		}

		lockfile, diffRepos, err := diffReleases.Resolve(currentRepositories, clusterWorkdirPath)
		if err != nil {
			return err
		}

		hashesPerRelease, err := provider.SyncState(diffReleases, diffRepos)
		if err != nil {
			return err
		}

		if err := kustomize.Generate(clusterWorkdirPath, gh); err != nil {
			return err
		}

		lockfile.AddHashes(hashesPerRelease)

		if err := lockfile.WriteToFile(clusterWorkdirPath); err != nil {
			return err
		}
		if _, err := gh.AddAllAndCommit(clusterWorkdirPath, "Update the lockfile"); err != nil {
			return err
		}
		if !opts.Dry {
			if err := gh.Push(clusterWorkdirPath); err != nil {
				return err
			}
		}

	}
	if !opts.Dry {
		if err := workdir.RemoveWorkdir(opts.Workdir); err != nil {
			return err
		}
	}

	return nil
}