// This file is part of the happyDeliver (R) project.
// Copyright (c) 2025 happyDomain
// Authors: Pierre-Olivier Mercier, et al.
//
// This program is offered under a commercial and under the AGPL license.
// For commercial licensing, contact us at <contact@happydomain.org>.
//
// For AGPL licensing:
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

package analyzer

import (
	"regexp"
	"strings"

	"git.happydns.org/happyDeliver/internal/api"
)

// parseXAlignedFromResult parses X-Aligned-From result from Authentication-Results
// Example: x-aligned-from=pass (Address match)
func (a *AuthenticationAnalyzer) parseXAlignedFromResult(part string) *api.AuthResult {
	result := &api.AuthResult{}

	// Extract result (pass, fail, etc.)
	re := regexp.MustCompile(`x-aligned-from=([\w]+)`)
	if matches := re.FindStringSubmatch(part); len(matches) > 1 {
		resultStr := strings.ToLower(matches[1])
		result.Result = api.AuthResultResult(resultStr)
	}

	// Extract details (everything after the result)
	result.Details = api.PtrTo(strings.TrimPrefix(part, "x-aligned-from="))

	return result
}

func (a *AuthenticationAnalyzer) calculateXAlignedFromScore(results *api.AuthenticationResults) (score int) {
	if results.XAlignedFrom != nil {
		switch results.XAlignedFrom.Result {
		case api.AuthResultResultPass:
			// pass: positive contribution
			return 100
		case api.AuthResultResultFail:
			// fail: negative contribution
			return 0
		default:
			// neutral, none, etc.: no impact
			return 0
		}
	}

	return 0
}