package pkgmanager

import (
	"fmt"
	"os"
	"os/exec"
	"path/filepath"
	"runtime"
	"strings"
)

type PackageInfo struct {
	Name    string `json:"name"`
	Version string `json:"version"`
	Manager string `json:"manager"`
}

type ServiceInfo struct {
	Name    string `json:"name"`
	Status  string `json:"status"`
	Enabled bool   `json:"enabled"`
}

func DetectManager() string {
	if runtime.GOOS == "windows" {
		if _, err := exec.LookPath(resolveManagerPath("winget", interactiveProfile())); err == nil {
			return "winget"
		}
		if _, err := exec.LookPath(resolveManagerPath("choco", interactiveProfile())); err == nil {
			return "choco"
		}
		if _, err := exec.LookPath("msiexec"); err == nil {
			return "msiexec"
		}
		return "unknown"
	}
	if _, err := exec.LookPath("apt"); err == nil {
		return "apt"
	}
	if _, err := exec.LookPath("dnf"); err == nil {
		return "dnf"
	}
	if _, err := exec.LookPath("yum"); err == nil {
		return "yum"
	}
	return "unknown"
}

func ListPackages() ([]PackageInfo, error) {
	if runtime.GOOS == "windows" {
		return listWindowsPackages()
	}
	manager := DetectManager()
	switch manager {
	case "apt":
		return listAptPackages()
	case "yum", "dnf":
		return listYumPackages()
	case "winget":
		return listWingetPackages()
	}
	return nil, fmt.Errorf("unsupported package manager: %s", manager)
}

func listAptPackages() ([]PackageInfo, error) {
	cmd := exec.Command("dpkg-query", "-W", "-f", "${Package}\t${Version}\n")
	out, err := cmd.Output()
	if err != nil {
		return nil, fmt.Errorf("dpkg-query failed: %w", err)
	}

	var packages []PackageInfo
	for _, line := range strings.Split(strings.TrimSpace(string(out)), "\n") {
		if line == "" {
			continue
		}
		parts := strings.SplitN(line, "\t", 2)
		if len(parts) == 2 {
			packages = append(packages, PackageInfo{
				Name:    parts[0],
				Version: parts[1],
				Manager: "apt",
			})
		}
	}
	return packages, nil
}

func listYumPackages() ([]PackageInfo, error) {
	cmd := exec.Command("rpm", "-qa", "--queryformat", "%{NAME}\t%{VERSION}-%{RELEASE}\n")
	out, err := cmd.Output()
	if err != nil {
		return nil, fmt.Errorf("rpm query failed: %w", err)
	}

	var packages []PackageInfo
	for _, line := range strings.Split(strings.TrimSpace(string(out)), "\n") {
		if line == "" {
			continue
		}
		parts := strings.SplitN(line, "\t", 2)
		if len(parts) == 2 {
			packages = append(packages, PackageInfo{
				Name:    parts[0],
				Version: parts[1],
				Manager: "yum",
			})
		}
	}
	return packages, nil
}

func listWingetPackages() ([]PackageInfo, error) {
	cmd := exec.Command(resolveManagerPath("winget", interactiveProfile()), "list", "--accept-source-agreements", "--disable-interactivity")
	out, err := cmd.Output()
	if err != nil {
		return nil, fmt.Errorf("winget list failed: %w", err)
	}

	var packages []PackageInfo
	lines := strings.Split(string(out), "\n")
	inTable := false
	for _, line := range lines {
		trimmed := strings.TrimSpace(line)
		if strings.HasPrefix(trimmed, "Name") && strings.Contains(trimmed, "Id") {
			inTable = true
			continue
		}
		if inTable && strings.Contains(trimmed, "---") {
			continue
		}
		if inTable && trimmed != "" {
			fields := strings.Fields(trimmed)
			if len(fields) >= 3 {
				pkg := PackageInfo{
					Name:    fields[0],
					Version: fields[len(fields)-1],
					Manager: "winget",
				}
				packages = append(packages, pkg)
			}
		}
	}
	return packages, nil
}

func InstallPackage(name string) (string, error) {
	return installPackageWithManager(name, DetectManager(), "")
}

func InstallPackageWithManager(name, manager, version string) (string, error) {
	return installPackageWithManager(name, manager, version)
}

func installPackageWithManager(name, manager, version string) (string, error) {
	var executable string
	var args []string

	switch manager {
	case "apt":
		executable = "sudo"
		args = []string{"apt-get", "install", "-y", name}
	case "yum":
		executable = "sudo"
		args = []string{"yum", "install", "-y", name}
	case "dnf":
		executable = "sudo"
		args = []string{"dnf", "install", "-y", name}
	case "winget":
		executable = "winget"
		args = []string{"install", "--id", name, "--accept-source-agreements", "--accept-package-agreements", "--disable-interactivity"}
		if version != "" {
			args = append(args, "--version", version)
		}
	case "choco":
		executable = "choco"
		args = []string{"install", "-y", name}
		if version != "" {
			args = append(args, "--version", version)
		}
	case "msiexec":
		executable = "msiexec"
		args = []string{"/i", name, "/quiet", "/norestart"}
	default:
		return "", fmt.Errorf("unsupported package manager: %s", manager)
	}

	out, err := runManagerCommand(executable, args)
	if err != nil {
		return out, err
	}
	return out, nil
}

func InstallPackageFromFile(filePath string) (string, error) {
	ext := strings.ToLower(filepath.Ext(filePath))
	switch runtime.GOOS {
	case "windows":
		switch ext {
		case ".msi":
			cmd := exec.Command("msiexec", "/i", filePath, "/quiet", "/norestart")
			out, err := cmd.CombinedOutput()
			if err != nil {
				return string(out), fmt.Errorf("msi install failed: %w\nOutput: %s", err, string(out))
			}
			return string(out), nil
		case ".exe":
			cmd := exec.Command(filePath, "/S")
			out, err := cmd.CombinedOutput()
			if err != nil {
				return string(out), fmt.Errorf("exe install failed: %w\nOutput: %s", err, string(out))
			}
			return string(out), nil
		case ".msix", ".appx":
			cmd := exec.Command("powershell", "-Command", fmt.Sprintf("Add-AppxPackage -Path '%s'", filePath))
			out, err := cmd.CombinedOutput()
			if err != nil {
				return string(out), fmt.Errorf("msix install failed: %w\nOutput: %s", err, string(out))
			}
			return string(out), nil
		}
	case "linux":
		switch ext {
		case ".deb":
			cmd := exec.Command("sudo", "dpkg", "-i", filePath)
			out, err := cmd.CombinedOutput()
			if err != nil {
				cmd2 := exec.Command("sudo", "apt-get", "install", "-f", "-y")
				out2, _ := cmd2.CombinedOutput()
				return string(out) + "\n" + string(out2), fmt.Errorf("dpkg install failed: %w", err)
			}
			return string(out), nil
		case ".rpm":
			cmd := exec.Command("sudo", "rpm", "-i", filePath)
			out, err := cmd.CombinedOutput()
			if err != nil {
				return string(out), fmt.Errorf("rpm install failed: %w\nOutput: %s", err, string(out))
			}
			return string(out), nil
		}
	case "darwin":
		switch ext {
		case ".dmg":
			cmd := exec.Command("hdiutil", "attach", filePath, "-nobrowse", "-quiet")
			out, err := cmd.CombinedOutput()
			if err != nil {
				return string(out), fmt.Errorf("dmg mount failed: %w", err)
			}
			return string(out), nil
		case ".pkg":
			cmd := exec.Command("sudo", "installer", "-pkg", filePath, "-target", "/")
			out, err := cmd.CombinedOutput()
			if err != nil {
				return string(out), fmt.Errorf("pkg install failed: %w\nOutput: %s", err, string(out))
			}
			return string(out), nil
		}
	}

	return "", fmt.Errorf("unsupported file type %s for %s", ext, runtime.GOOS)
}

func UpdatePackage(name string) (string, error) {
	manager := DetectManager()
	var executable string
	var args []string

	switch manager {
	case "apt":
		executable = "sudo"
		args = []string{"apt-get", "install", "-y", "--only-upgrade", name}
	case "yum":
		executable = "sudo"
		args = []string{"yum", "update", "-y", name}
	case "dnf":
		executable = "sudo"
		args = []string{"dnf", "update", "-y", name}
	case "winget":
		executable = "winget"
		args = []string{"upgrade", "--id", name, "--accept-source-agreements", "--accept-package-agreements", "--disable-interactivity"}
	case "choco":
		executable = "choco"
		args = []string{"upgrade", "-y", name}
	default:
		return "", fmt.Errorf("unsupported package manager: %s", manager)
	}

	out, err := runManagerCommand(executable, args)
	if err != nil {
		return out, err
	}
	return out, nil
}

func RemovePackage(name string) (string, error) {
	return removePackageWithManager(name, DetectManager())
}

func removePackageWithManager(name, manager string) (string, error) {
	var executable string
	var args []string

	switch manager {
	case "apt":
		executable = "sudo"
		args = []string{"apt-get", "remove", "-y", name}
	case "yum":
		executable = "sudo"
		args = []string{"yum", "remove", "-y", name}
	case "dnf":
		executable = "sudo"
		args = []string{"dnf", "remove", "-y", name}
	case "winget":
		executable = "winget"
		args = []string{"uninstall", "--id", name, "--accept-source-agreements", "--disable-interactivity"}
	case "choco":
		executable = "choco"
		args = []string{"uninstall", "-y", name}
	default:
		return "", fmt.Errorf("unsupported package manager: %s", manager)
	}

	out, err := runManagerCommand(executable, args)
	if err != nil {
		return out, err
	}
	return out, nil
}

func RemovePackageWithManager(name, manager string) (string, error) {
	return removePackageWithManager(name, manager)
}

func DownloadFile(url string, destPath string) error {
	dir := filepath.Dir(destPath)
	if err := os.MkdirAll(dir, 0755); err != nil {
		return fmt.Errorf("failed to create directory: %w", err)
	}

	var cmd *exec.Cmd
	if _, err := exec.LookPath("curl"); err == nil {
		cmd = exec.Command("curl", "-L", "-o", destPath, url)
	} else if _, err := exec.LookPath("wget"); err == nil {
		cmd = exec.Command("wget", "-O", destPath, url)
	} else {
		return fmt.Errorf("neither curl nor wget found")
	}

	out, err := cmd.CombinedOutput()
	if err != nil {
		return fmt.Errorf("download failed: %w\nOutput: %s", err, string(out))
	}
	return nil
}