package execution

import (
	"errors"
	"fmt"
	"os"
	"path"
	"strings"

	"github.com/j3ssie/osmedeus/libs"
	"github.com/j3ssie/osmedeus/utils"
)

/*

Base Git command:
GIT_SSH_COMMAND='ssh -o StrictHostKeyChecking=no -i /path/to/private/key' git xxx

*/

/*
GitDiff('path-to-diff-file', 'path-to-output')
GitDiff('path-to-diff-folder', 'path-to-output')
GitDiff('path-to-diff-file', 'path-to-output', 'number-of-commit-to-diff')
*/

// GitDiff run git diff command
func GitDiff(dest string, output string, history string, options libs.Options) {
	if options.NoGit || options.Storages["secret_key"] == "" {
		return
	}
	if !utils.FileExists(dest) {
		utils.WarnF("File not found: %v", dest)
		return
	}
	utils.DebugF("Git Diff: %v", dest)
	diffCmd := fmt.Sprintf("GIT_SSH_COMMAND='ssh -o StrictHostKeyChecking=no -i %v' git diff -U0 HEAD~%v --output=%v %v", options.Storages["secret_key"], history, output, dest)
	Execution(diffCmd, options)
}

// LoopGitDiff like GitDiff but take input as a file
func LoopGitDiff(src string, output string, options libs.Options) {
	lines := utils.ReadingFileUnique(src)
	if len(lines) == 0 {
		return
	}
	for _, line := range lines {
		GitDiff(line, output, "1", options)
	}
}

// DiffCompare run git diff command
func DiffCompare(src string, dest string, output string, options libs.Options) {
	if options.NoGit || options.Storages["secret_key"] == "" {
		return
	}
	// if !utils.FileExists(src) || !utils.FileExists(dest) {
	// 	return
	// }
	diffCmd := fmt.Sprintf("GIT_SSH_COMMAND='ssh -o StrictHostKeyChecking=no -i %v' git diff --no-index --output=%v %v %v", options.Storages["secret_key"], output, src, dest)
	Execution(diffCmd, options)
}

// PullResult pull latest data from result repo
func PullResult(storageFolder string, options libs.Options) {
	if options.NoGit || options.Storages["secret_key"] == "" {
		return
	}
	if !utils.FolderExists(storageFolder) {
		return
	}
	utils.DebugF("git pull on: %v", storageFolder)
	pullCmd := fmt.Sprintf("GIT_SSH_COMMAND='ssh -o StrictHostKeyChecking=no -i %v' git -C %v pull -f", options.Storages["secret_key"], storageFolder)
	Execution(pullCmd, options)
}

// PushResult push result to git repo
func PushResult(storageFolder string, commitMess string, options libs.Options) {
	if options.NoGit || options.Storages["secret_key"] == "" {
		return
	}

	if !utils.FolderExists(storageFolder) {
		return
	}
	utils.DebugF("git push on: %v", storageFolder)
	cmds := []string{
		fmt.Sprintf(`GIT_SSH_COMMAND='ssh -o StrictHostKeyChecking=no -i %v' git -C %v add -A`, options.Storages["secret_key"], storageFolder),
		fmt.Sprintf(`GIT_SSH_COMMAND='ssh -o StrictHostKeyChecking=no -i %v' git -C %v commit -m "%v"`, options.Storages["secret_key"], storageFolder, commitMess),
		fmt.Sprintf(`GIT_SSH_COMMAND='ssh -o StrictHostKeyChecking=no -i %v' git -C %v push -f`, options.Storages["secret_key"], storageFolder),
		fmt.Sprintf(`GIT_SSH_COMMAND='ssh -o StrictHostKeyChecking=no -i %v' git -C %v push -f`, options.Storages["secret_key"], storageFolder),
	}
	// really run git command
	for _, cmd := range cmds {
		Execution(cmd, options)
	}
}

// GitClone update latest UI and Plugins from default repo
func GitClone(url string, dest string, forced bool, options libs.Options) {
	if options.NoGit || options.Storages["secret_key"] == "" {
		utils.WarnF("Storage Disable")
		return
	}

	if url == "" || dest == "" {
		utils.WarnF("Invalid repo or no destination")
		return
	}

	// check if folder is exist or not
	dest = utils.NormalizePath(dest)
	if forced {
		utils.DebugF("Remove: %v", dest)
		os.RemoveAll(dest)
	}

	// if folder exist and have .git folder in it, do git pull instead
	if utils.FolderExists(dest) {
		if utils.FileExists(path.Join(dest, "/.git/HEAD")) {
			pullCmd := fmt.Sprintf("GIT_SSH_COMMAND='ssh -o StrictHostKeyChecking=no -i %v' git -C %v pull -f", options.Storages["secret_key"], dest)
			Execution(pullCmd, options)
			return
		}
	}

	// cloning new
	utils.DebugF("Cloning: %v", url)
	cloneCmd := fmt.Sprintf("GIT_SSH_COMMAND='ssh -o StrictHostKeyChecking=no -i %v' git clone --depth=1 %v %v", options.Storages["secret_key"], url, dest)
	Execution(cloneCmd, options)
}

// CloneRepo clone the repo
func CloneRepo(url string, dest string, options libs.Options) error {
	if !ValidGitURL(url) {
		return errors.New("invalid repo name")
	}
	if options.NoGit || options.Storages["secret_key"] == "" {
		return errors.New("storage Disable")
	}

	if url == "" || dest == "" {
		return errors.New("storage didn't setup correctly")
	}
	// check if folder is exist or not
	dest = utils.NormalizePath(dest)
	utils.DebugF("Cloning: %v", url)

	if utils.FolderExists(dest) {
		if utils.FileExists(path.Join(dest, "/.git/HEAD")) {
			return nil
		}
		utils.DebugF("Remove: %v", dest)
		os.RemoveAll(dest)
	}

	// cloning new
	cloneCmd := fmt.Sprintf("GIT_SSH_COMMAND='ssh -o StrictHostKeyChecking=no -i %v' git clone --depth=1 %v %v", options.Storages["secret_key"], url, dest)
	Execution(cloneCmd, options)
	if utils.FolderExists(dest) {
		if utils.FileExists(path.Join(dest, "/.git/HEAD")) {
			return nil
		}
		return nil
	}
	return errors.New("fail to clone Repo")
}

// ValidGitURL simple validate git repo
func ValidGitURL(raw string) bool {
	if strings.TrimSpace(raw) == "" {
		return false
	}
	if !strings.HasPrefix(raw, "git@") {
		return false
	}

	if !strings.Contains(raw, "github.com") && !strings.Contains(raw, "gitlab.com") {
		return false
	}

	return true
}