// 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
package cmd

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

	"github.com/pterm/pterm"
	"github.com/spf13/cobra"
	"golang.org/x/sys/unix"

	"gitea.libretechconsulting.com/rmcguire/git-project-manager/internal/cache"
	"gitea.libretechconsulting.com/rmcguire/git-project-manager/internal/config"
	"gitea.libretechconsulting.com/rmcguire/git-project-manager/internal/remotes"
	gitearemote "gitea.libretechconsulting.com/rmcguire/git-project-manager/internal/remotes/gitea"
	githubremote "gitea.libretechconsulting.com/rmcguire/git-project-manager/internal/remotes/github"
	gitlabremote "gitea.libretechconsulting.com/rmcguire/git-project-manager/internal/remotes/gitlab"
	"gitea.libretechconsulting.com/rmcguire/git-project-manager/internal/remotes/remote"
)

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

	gitRemotes := remotes.NewRemotes()
	gitRemotes.AddRemotes(*getRemotes(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))
}

// Generically loads remotes from info.RemoteInfo in config.Remotes
func getRemotes(cmd *cobra.Command) *remotes.Remotes {
	gitRemotes := new(remotes.Remotes)
	*gitRemotes = make([]remote.Remote, 0)
	for _, r := range conf.Remotes {
		// Create a copy, set context
		gitRemoteInfo := r
		gitRemoteInfo.SetContext(cmd.Context())
		var gitRemote remote.Remote
		var err error
		switch r.Type {
		case "gitlab":
			gitRemote, err = gitlabremote.NewGitlabRemote(&gitRemoteInfo)
		case "gitea":
			gitRemote, err = gitearemote.NewGiteaRemote(&gitRemoteInfo)
		case "github":
			gitRemote, err = githubremote.NewGithubRemote(&gitRemoteInfo)
		}
		if err != nil {
			plog.Error("Failed to prepare remote", plog.Args(
				"error", err,
				"type", r.Type))
		} else {
			*gitRemotes = append(*gitRemotes, gitRemote)
		}
	}
	return gitRemotes
}

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

func initProjectPath(_ *cobra.Command, _ []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, 0o750); 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)
}

func getConfigName(configPath string) string {
	// Check existing config
	for _, ext := range []string{"yml", "yaml"} {
		configFile := fmt.Sprintf("%s/%s.%s", configPath, configName, ext)
		legacyConfigFile := fmt.Sprintf("%s/%s.%s", configPath, legacyConfigName, ext)

		if _, err := os.Stat(configFile); err == nil {
			return configName
		} else if _, err := os.Stat(legacyConfigFile); err == nil {
			pterm.DefaultLogger.WithWriter(os.Stderr).
				Warn(fmt.Sprintf("using legacy config path, suggest using %s/%s.yaml", configPath, configName))
			return legacyConfigName
		}
	}

	// Nothing found, do what we want
	return configName
}