package aptsolver

import (
	"strings"

	"github.com/osbuild/images/pkg/arch"
	"github.com/osbuild/images/pkg/bib/osinfo"
)

// AptSolver implements package dependency resolution for Debian using apt
type AptSolver struct {
	arch     arch.Arch
	osInfo   *osinfo.Info
	cacheDir string
}

// DepsolveResult represents the result of apt dependency resolution
type DepsolveResult struct {
	Packages []string
	Repos    []interface{}
}

// NewAptSolver creates a new apt-based solver for Debian
func NewAptSolver(cacheDir string, arch arch.Arch, osInfo *osinfo.Info) *AptSolver {
	return &AptSolver{
		arch:     arch,
		osInfo:   osInfo,
		cacheDir: cacheDir,
	}
}

// Depsolve resolves package dependencies using apt
func (s *AptSolver) Depsolve(packages []string, maxAttempts int) (*DepsolveResult, error) {
	// For now, we'll return the packages as-is since apt dependency resolution
	// is more complex and would require running apt in a chroot
	// This is a simplified implementation that will be enhanced later
	
	result := &DepsolveResult{
		Packages: packages,
		Repos: []interface{}{
			map[string]interface{}{
				"name":     "debian",
				"baseurls": []string{"http://deb.debian.org/debian"},
			},
			map[string]interface{}{
				"name":     "debian-security",
				"baseurls": []string{"http://deb.debian.org/debian-security"},
			},
		},
	}
	
	return result, nil
}

// GetArch returns the architecture for this solver
func (s *AptSolver) GetArch() arch.Arch {
	return s.arch
}

// GetOSInfo returns the OS information for this solver
func (s *AptSolver) GetOSInfo() *osinfo.Info {
	return s.osInfo
}

// ValidatePackages checks if the specified packages are available in Debian repositories
func (s *AptSolver) ValidatePackages(packages []string) error {
	// This is a simplified validation - in a real implementation,
	// we would query the Debian package database
	for _, pkg := range packages {
		if !strings.HasPrefix(pkg, "linux-") && 
		   !strings.HasPrefix(pkg, "grub-") && 
		   !strings.HasPrefix(pkg, "initramfs-") &&
		   pkg != "util-linux" &&
		   pkg != "parted" &&
		   pkg != "e2fsprogs" &&
		   pkg != "dosfstools" &&
		   pkg != "efibootmgr" &&
		   pkg != "systemd" &&
		   pkg != "dbus" &&
		   pkg != "sudo" {
			// For now, we'll assume these are valid Debian packages
			// In a real implementation, we would validate against the package database
		}
	}
	return nil
}

// GetPackageInfo retrieves information about a specific package
func (s *AptSolver) GetPackageInfo(packageName string) (map[string]interface{}, error) {
	// This is a placeholder - in a real implementation, we would query apt
	// for detailed package information
	return map[string]interface{}{
		"name":    packageName,
		"version": "latest",
		"arch":    s.arch.String(),
	}, nil
}