package cmd

import (
	"os"
	"os/user"
	"path/filepath"
	"strings"

	"github.com/spf13/cobra"
	"gitlab.sweetwater.com/it/devops/tools/gitlab-project-manager/internal/cache"
	"gitlab.sweetwater.com/it/devops/tools/gitlab-project-manager/internal/config"
	"gitlab.sweetwater.com/it/devops/tools/gitlab-project-manager/internal/remotes"
	gitearemote "gitlab.sweetwater.com/it/devops/tools/gitlab-project-manager/internal/remotes/gitea"
	gitlabremote "gitlab.sweetwater.com/it/devops/tools/gitlab-project-manager/internal/remotes/gitlab"
	"gitlab.sweetwater.com/it/devops/tools/gitlab-project-manager/internal/remotes/remote"
	"golang.org/x/sys/unix"
)

// This file contains init methods that may be used by
// multiple sub-commands. For instance, the cach and projects
// sub-commands both depend on a cache and may both call the initProjectCache
// func from their PersistentPreRun commands

func initProjectCache(cmd *cobra.Command, args []string) {
	var err error
	plog.Debug("Running pre-run for cacheCmd")
	conf.Cache.File = conf.ProjectPath + "/.cache.yaml"

	gitRemotes := remotes.NewRemotes()

	// Load GitLabs
	gitRemotes.AddRemotes(getGitLabRemotes(cmd)...)

	// Load Giteas
	gitRemotes.AddRemotes(getGiteaRemotes(cmd)...)

	cacheOpts := &cache.CacheOpts{
		ProjectsPath: conf.ProjectPath,
		Path:         conf.Cache.File,
		TTL:          conf.Cache.Ttl,
		Logger:       plog,
		Remotes:      gitRemotes,
		Config:       &conf,
	}
	if projectCache, err = cache.NewProjectCache(cacheOpts); err != nil {
		plog.Error("Failed to prepare project cache", plog.Args("error", err))
		os.Exit(1)
	}

	if err := projectCache.Read(); err != nil {
		plog.Error("Cache load failed", plog.Args("error", err))
		os.Exit(1)
	}

	plog.Debug("Remotes Loaded", plog.Args("remotes", cacheOpts.Remotes))
}

// Loads all configured giteas
func getGiteaRemotes(cmd *cobra.Command) []remote.Remote {
	gitRemotes := make([]remote.Remote, 0)
	for _, gitea := range conf.Giteas {
		if gitea.CloneProto == "" {
			gitea.CloneProto = config.DefaultCloneProto
		}
		giteaRemote, err := gitearemote.NewGiteaRemote(&remote.RemoteInfo{
			Ctx:        cmd.Context(),
			Host:       gitea.Host,
			Name:       gitea.Name,
			Token:      gitea.Token,
			CloneProto: gitea.CloneProto,
		})
		if err != nil {
			plog.Error("Failed to prepare Gitea remote", plog.Args("error", err))
		} else {
			gitRemotes = append(gitRemotes, giteaRemote)
		}
	}
	return gitRemotes
}

// Loads all configured gitlabs, including as defined by legacy
// top-level keys
func getGitLabRemotes(cmd *cobra.Command) []remote.Remote {
	gitRemotes := make([]remote.Remote, 0)

	// Support legacy keys
	if conf.GitlabHost != "" && conf.GitlabToken != "" {
		conf.Gitlabs = append(conf.Gitlabs, config.GitlabConfig{
			Host:       conf.GitlabHost,
			Name:       conf.GitlabHost,
			Token:      conf.GitlabToken,
			CloneProto: config.CloneProtoSSH,
		})
	}

	// Load Gitlabs
	for _, gl := range conf.Gitlabs {
		if gl.CloneProto == "" {
			gl.CloneProto = config.DefaultCloneProto
		}
		gitlabRemote, err := gitlabremote.NewGitlabRemote(&remote.RemoteInfo{
			Ctx:        cmd.Context(),
			Host:       gl.Host,
			Name:       gl.Name,
			Token:      gl.Token,
			CloneProto: gl.CloneProto,
		})
		if err != nil {
			plog.Error("Failed to prepare GitLab remote", plog.Args("error", err))
		} else {
			gitRemotes = append(gitRemotes, gitlabRemote)
		}
	}

	return gitRemotes
}

func postProjectCache(cmd *cobra.Command, args []string) {
	projectCache.Write()
}

func initProjectPath(cmd *cobra.Command, args []string) {
	plog.Debug("Running persistent pre-run for rootCmd")
	var err error
	if conf.ProjectPath == "" {
		conf.ProjectPath = config.DefaultConfig.ProjectPath
		return
	}
	if conf.ProjectPath, err = resolvePath(conf.ProjectPath); err != nil {
		plog.Error("Failed to determine project path", plog.Args("error", err))
		os.Exit(1)
	}
	_, err = os.Stat(conf.ProjectPath)
	if err != nil {
		plog.Error("Failed to stat project path, trying to create", plog.Args("error", err))
		if err := os.MkdirAll(conf.ProjectPath, 0750); err != nil {
			plog.Error("Failed to create project path", plog.Args("error", err))
			os.Exit(1)
		}
		plog.Info("Project path created", plog.Args("path", conf.ProjectPath))
	} else {
		if err = unix.Access(conf.ProjectPath, unix.W_OK); err != nil {
			plog.Error("Unable to write to project path", plog.Args(
				"path", conf.ProjectPath,
				"error", err))
			os.Exit(1)
		}
	}
}

func resolvePath(path string) (string, error) {
	if strings.HasPrefix(path, "~/") {
		usr, _ := user.Current()
		path = filepath.Join(usr.HomeDir, path[2:])
	}
	return filepath.Abs(path)
}