package repositories

import (
	"fmt"
	"os"
	"os/exec"
	"slices"
	"strings"

	"code.oliverdavies.uk/opdavies/git-repo-updater/internal/config"
	"code.oliverdavies.uk/opdavies/git-repo-updater/internal/utils"
)

func Update(repositoryPath string) error {
	cfg, err := config.Load()

	if err != nil {
		// TODO
	}

	repositoryPath = strings.TrimSuffix(repositoryPath, "/.git")

	expandedIgnored := make([]string, 0, len(cfg.IgnoredRepos))
	for _, ignored := range cfg.IgnoredRepos {
		if expanded, err := utils.ExpandPath(ignored); err == nil {
			expandedIgnored = append(expandedIgnored, expanded)
		}
	}

	if slices.Contains(expandedIgnored, repositoryPath) {
		fmt.Printf("Skipping %s as it's ignored\n", repositoryPath)

		return nil
	}

	err = os.Chdir(repositoryPath)

	if err != nil {
		return fmt.Errorf("failed to change directory to %s: %w", repositoryPath, err)
	}

	fmt.Printf("Updating %s\n", repositoryPath)

	commands := [][]string{
		{"git", "fetch", "--all", "--jobs=4", "--progress", "--prune"},
		{"git", "pull", "--rebase"},
	}

	for _, args := range commands {
		cmd := exec.Command(args[0], args[1:]...)
		cmd.Stdout = os.Stdout
		cmd.Stderr = os.Stderr

		if err := cmd.Run(); err != nil {
			return fmt.Errorf("%s failed: %w", strings.Join(args, " "), err)
		}
	}

	return nil
}