package catalogue

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"os"
	"path"

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

// CatalogueSkipList is all the repos that are not recipes.
var CatalogueSkipList = map[string]bool{
	"abra":                  true,
	"abra-apps":             true,
	"abra-aur":              true,
	"abra-bash":             true,
	"abra-capsul":           true,
	"abra-gandi":            true,
	"abra-hetzner":          true,
	"apps":                  true,
	"aur-abra-git":          true,
	"auto-apps-json":        true,
	"auto-mirror":           true,
	"backup-bot":            true,
	"backup-bot-two":        true,
	"comrade-renovate-bot":  true,
	"coopcloud.tech":        true,
	"coturn":                true,
	"docker-cp-deploy":      true,
	"docker-dind-bats-kcov": true,
	"docs.coopcloud.tech":   true,
	"drone-abra":            true,
	"example":               true,
	"gardening":             true,
	"go-abra":               true,
	"organising":            true,
	"pyabra":                true,
	"radicle-seed-node":     true,
	"recipes":               true,
	"stack-ssh-deploy":      true,
	"swarm-cronjob":         true,
	"tagcmp":                true,
	"traefik-cert-dumper":   true,
	"tyop":                  true,
}

var commit bool
var commitFlag = &cli.BoolFlag{
	Name:        "commit",
	Usage:       "Commits new generated catalogue changes",
	Value:       false,
	Aliases:     []string{"c"},
	Destination: &commit,
}

var catalogueGenerateCommand = &cli.Command{
	Name:    "generate",
	Aliases: []string{"g"},
	Usage:   "Generate a new copy of the catalogue",
	Flags: []cli.Flag{
		internal.PushFlag,
		commitFlag,
		internal.CommitMessageFlag,
	},
	Description: `
This command generates a new copy of the recipe catalogue which can be found on:

    https://recipes.coopcloud.tech

It polls the entire git.coopcloud.tech/coop-cloud/... recipe repository
listing, parses README and tags to produce recipe metadata and produces a
apps.json file which is placed in your ~/.abra/catalogue/recipes.json.

It is possible to generate new metadata for a single recipe by passing
<recipe>. The existing local catalogue will be updated, not overwritten.

A new catalogue copy can be published to the recipes repository by passing the
"--commit" and "--push" flags. The recipes repository is available here:

    https://git.coopcloud.tech/coop-cloud/recipes

`,
	ArgsUsage: "[<recipe>]",
	Action: func(c *cli.Context) error {
		recipeName := c.Args().First()
		if recipeName != "" {
			internal.ValidateRecipe(c)
		}

		catalogueDir := path.Join(config.ABRA_DIR, "catalogue")
		url := fmt.Sprintf("%s/%s.git", config.REPOS_BASE_URL, "recipes")
		if err := gitPkg.Clone(catalogueDir, url); err != nil {
			return err
		}

		repos, err := catalogue.ReadReposMetadata()
		if err != nil {
			logrus.Fatal(err)
		}

		logrus.Debugf("ensuring '%v' recipe(s) are locally present and up-to-date", len(repos))

		cloneLimiter := limit.New(10)
		retrieveBar := formatter.CreateProgressbar(len(repos), "retrieving recipes...")
		ch := make(chan string, len(repos))
		for _, repoMeta := range repos {
			go func(rm catalogue.RepoMeta) {
				cloneLimiter.Begin()
				defer cloneLimiter.End()

				if recipeName != "" && recipeName != rm.Name {
					ch <- rm.Name
					retrieveBar.Add(1)
					return
				}
				if _, exists := CatalogueSkipList[rm.Name]; exists {
					ch <- rm.Name
					retrieveBar.Add(1)
					return
				}

				recipeDir := path.Join(config.ABRA_DIR, "apps", rm.Name)

				if err := gitPkg.Clone(recipeDir, rm.SSHURL); err != nil {
					logrus.Fatal(err)
				}

				isClean, err := gitPkg.IsClean(rm.Name)
				if err != nil {
					logrus.Fatal(err)
				}

				if !isClean {
					logrus.Fatalf("'%s' has locally unstaged changes", rm.Name)
				}

				if err := gitPkg.EnsureUpToDate(recipeDir); err != nil {
					logrus.Fatal(err)
				}

				ch <- rm.Name
				retrieveBar.Add(1)
			}(repoMeta)
		}

		for range repos {
			<-ch // wait for everything
		}

		catl := make(catalogue.RecipeCatalogue)
		catlBar := formatter.CreateProgressbar(len(repos), "generating catalogue...")
		for _, recipeMeta := range repos {
			if recipeName != "" && recipeName != recipeMeta.Name {
				catlBar.Add(1)
				continue
			}

			if _, exists := CatalogueSkipList[recipeMeta.Name]; exists {
				catlBar.Add(1)
				continue
			}

			versions, err := catalogue.GetRecipeVersions(recipeMeta.Name)
			if err != nil {
				logrus.Fatal(err)
			}

			features, category, err := catalogue.GetRecipeFeaturesAndCategory(recipeMeta.Name)
			if err != nil {
				logrus.Warn(err)
			}

			catl[recipeMeta.Name] = catalogue.RecipeMeta{
				Name:          recipeMeta.Name,
				Repository:    recipeMeta.CloneURL,
				Icon:          recipeMeta.AvatarURL,
				DefaultBranch: recipeMeta.DefaultBranch,
				Description:   recipeMeta.Description,
				Website:       recipeMeta.Website,
				Versions:      versions,
				Category:      category,
				Features:      features,
			}
			catlBar.Add(1)
		}

		recipesJSON, err := json.MarshalIndent(catl, "", "    ")
		if err != nil {
			logrus.Fatal(err)
		}

		if _, err := os.Stat(config.APPS_JSON); err != nil && os.IsNotExist(err) {
			if err := ioutil.WriteFile(config.APPS_JSON, recipesJSON, 0644); err != nil {
				logrus.Fatal(err)
			}
		} else {
			if recipeName != "" {
				catlFS, err := catalogue.ReadRecipeCatalogue()
				if err != nil {
					logrus.Fatal(err)
				}
				catlFS[recipeName] = catl[recipeName]

				updatedRecipesJSON, err := json.MarshalIndent(catlFS, "", "    ")
				if err != nil {
					logrus.Fatal(err)
				}
				if err := ioutil.WriteFile(config.APPS_JSON, updatedRecipesJSON, 0644); err != nil {
					logrus.Fatal(err)
				}
			}
		}

		cataloguePath := path.Join(config.ABRA_DIR, "catalogue", "recipes.json")
		logrus.Infof("generated new recipe catalogue in %s", cataloguePath)

		if commit {
			repoPath := path.Join(config.ABRA_DIR, "catalogue")
			commitRepo, err := git.PlainOpen(repoPath)
			if err != nil {
				logrus.Fatal(err)
			}

			commitWorktree, err := commitRepo.Worktree()
			if err != nil {
				logrus.Fatal(err)
			}

			if internal.CommitMessage == "" {
				prompt := &survey.Input{
					Message: "commit message",
					Default: "chore: publish new catalogue changes",
				}
				if err := survey.AskOne(prompt, &internal.CommitMessage); err != nil {
					logrus.Fatal(err)
				}
			}

			err = commitWorktree.AddGlob("**.json")
			if err != nil {
				logrus.Fatal(err)
			}
			logrus.Debug("staged **.json for commit")

			_, err = commitWorktree.Commit(internal.CommitMessage, &git.CommitOptions{})
			if err != nil {
				logrus.Fatal(err)
			}
			logrus.Info("changes commited")

			if err := commitRepo.Push(&git.PushOptions{}); err != nil {
				logrus.Fatal(err)
			}
			logrus.Info("changes pushed")
		}

		return nil
	},
	BashComplete: autocomplete.RecipeNameComplete,
}