// ALR - Any Linux Repository
// Copyright (C) 2025 Евгений Храмов
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package manager

import (
	"bufio"
	"fmt"
	"os/exec"
	"strings"
)

type CommonRPM struct{}

func (c *CommonRPM) ListInstalled(opts *Opts) (map[string]string, error) {
	out := map[string]string{}
	cmd := exec.Command("rpm", "-qa", "--queryformat", "%{NAME}\u200b%|EPOCH?{%{EPOCH}:}:{}|%{VERSION}-%{RELEASE}\\n")

	stdout, err := cmd.StdoutPipe()
	if err != nil {
		return nil, err
	}

	err = cmd.Start()
	if err != nil {
		return nil, err
	}

	scanner := bufio.NewScanner(stdout)
	for scanner.Scan() {
		name, version, ok := strings.Cut(scanner.Text(), "\u200b")
		if !ok {
			continue
		}
		version = strings.TrimPrefix(version, "0:")
		out[name] = version
	}

	err = scanner.Err()
	if err != nil {
		return nil, err
	}

	return out, nil
}

func (a *CommonRPM) IsInstalled(pkg string) (bool, error) {
	cmd := exec.Command("rpm", "-q", "--whatprovides", pkg)
	output, err := cmd.CombinedOutput()
	if err != nil {
		if exitErr, ok := err.(*exec.ExitError); ok {
			if exitErr.ExitCode() == 1 {
				return false, nil
			}
		}
		return false, fmt.Errorf("rpm: isinstalled: %w, output: %s", err, output)
	}
	return true, nil
}