package recipe

import (
	"fmt"
	"path"
	"strconv"

	"coopcloud.tech/abra/cli/internal"
	"coopcloud.tech/abra/pkg/autocomplete"
	"coopcloud.tech/abra/pkg/config"
	"coopcloud.tech/tagcmp"
	"github.com/AlecAivazis/survey/v2"
	"github.com/go-git/go-git/v5"
	"github.com/go-git/go-git/v5/plumbing"
	"github.com/sirupsen/logrus"
	"github.com/urfave/cli/v2"
)

var recipeSyncCommand = &cli.Command{
	Name:      "sync",
	Usage:     "Ensure recipe version labels are up-to-date",
	Aliases:   []string{"s"},
	ArgsUsage: "<recipe> [<version>]",
	Flags: []cli.Flag{
		internal.DryFlag,
		internal.MajorFlag,
		internal.MinorFlag,
		internal.PatchFlag,
	},
	Description: `
This command will generate labels for the main recipe service (i.e. by
convention, the service named "app") which corresponds to the following format:

    coop-cloud.${STACK_NAME}.version=<version>

The <version> is determined by the recipe maintainer and is specified on the
command-line. The <recipe> configuration will be updated on the local file
system.

You may invoke this command in "wizard" mode and be prompted for input:

    abra recipe sync

`,
	Action: func(c *cli.Context) error {
		recipe := internal.ValidateRecipeWithPrompt(c)

		mainApp := internal.GetMainApp(recipe)

		imagesTmp, err := getImageVersions(recipe)
		if err != nil {
			logrus.Fatal(err)
		}
		mainAppVersion := imagesTmp[mainApp]

		tags, err := recipe.Tags()
		if err != nil {
			logrus.Fatal(err)
		}

		nextTag := c.Args().Get(1)
		if len(tags) == 0 && nextTag == "" {
			logrus.Warnf("no tags found for %s", recipe.Name)
			var chosenVersion string
			edPrompt := &survey.Select{
				Message: "which version do you want to begin with?",
				Options: []string{"0.1.0", "1.0.0"},
			}
			if err := survey.AskOne(edPrompt, &chosenVersion); err != nil {
				logrus.Fatal(err)
			}
			nextTag = fmt.Sprintf("%s+%s", chosenVersion, mainAppVersion)
		}

		if nextTag == "" && (!internal.Major && !internal.Minor && !internal.Patch) {
			if err := internal.PromptBumpType(""); err != nil {
				logrus.Fatal(err)
			}
		}

		if nextTag == "" {
			recipeDir := path.Join(config.APPS_DIR, recipe.Name)
			repo, err := git.PlainOpen(recipeDir)
			if err != nil {
				logrus.Fatal(err)
			}
			var lastGitTag tagcmp.Tag
			iter, err := repo.Tags()
			if err != nil {
				logrus.Fatal(err)
			}
			if err := iter.ForEach(func(ref *plumbing.Reference) error {
				obj, err := repo.TagObject(ref.Hash())
				if err != nil {
					return err
				}
				tagcmpTag, err := tagcmp.Parse(obj.Name)
				if err != nil {
					return err
				}
				if (lastGitTag == tagcmp.Tag{}) {
					lastGitTag = tagcmpTag
				} else if tagcmpTag.IsGreaterThan(lastGitTag) {
					lastGitTag = tagcmpTag
				}
				return nil
			}); err != nil {
				logrus.Fatal(err)
			}

			// bumpType is used to decide what part of the tag should be incremented
			bumpType := btoi(internal.Major)*4 + btoi(internal.Minor)*2 + btoi(internal.Patch)
			if bumpType != 0 {
				// a bitwise check if the number is a power of 2
				if (bumpType & (bumpType - 1)) != 0 {
					logrus.Fatal("you can only use one of: --major, --minor, --patch.")
				}
			}

			newTag := lastGitTag
			if bumpType > 0 {
				if internal.Patch {
					now, err := strconv.Atoi(newTag.Patch)
					if err != nil {
						logrus.Fatal(err)
					}
					newTag.Patch = strconv.Itoa(now + 1)
				} else if internal.Minor {
					now, err := strconv.Atoi(newTag.Minor)
					if err != nil {
						logrus.Fatal(err)
					}
					newTag.Patch = "0"
					newTag.Minor = strconv.Itoa(now + 1)
				} else if internal.Major {
					now, err := strconv.Atoi(newTag.Major)
					if err != nil {
						logrus.Fatal(err)
					}
					newTag.Patch = "0"
					newTag.Minor = "0"
					newTag.Major = strconv.Itoa(now + 1)
				}
			}

			newTag.Metadata = mainAppVersion
			logrus.Debugf("choosing %s as new version for %s", newTag.String(), recipe.Name)
			nextTag = newTag.String()
		}

		if _, err := tagcmp.Parse(nextTag); err != nil {
			logrus.Fatalf("invalid version %s specified", nextTag)
		}

		mainService := "app"
		var services []string
		hasAppService := false
		for _, service := range recipe.Config.Services {
			services = append(services, service.Name)
			if service.Name == "app" {
				hasAppService = true
				logrus.Debugf("detected app service in %s", recipe.Name)
			}
		}

		if !hasAppService {
			logrus.Fatalf("%s has no main 'app' service?", recipe.Name)
		}

		logrus.Debugf("selecting %s as the service to sync version label", mainService)

		label := fmt.Sprintf("coop-cloud.${STACK_NAME}.version=%s", nextTag)
		if !internal.Dry {
			if err := recipe.UpdateLabel(mainService, label); err != nil {
				logrus.Fatal(err)
			}
			logrus.Infof("synced label '%s' to service '%s'", label, mainService)
		} else {
			logrus.Infof("dry run only: NOT syncing label %s for recipe %s", nextTag, recipe.Name)
		}

		return nil
	},
	BashComplete: autocomplete.RecipeNameComplete,
}