// This file is part of the happyDomain (R) project.
// Copyright (c) 2026 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 checker

import (
	"fmt"

	sdk "git.happydns.org/checker-sdk-go/checker"
)

// Evaluate folds findings into a single CheckState. The status is the
// highest severity observed: any Crit makes the whole result Crit, any Warn
// makes it Warn, otherwise OK.
func Evaluate(data *DelegationData) sdk.CheckState {
	status := sdk.StatusOK
	var crit, warn, info int
	for _, f := range data.Findings {
		switch f.Severity {
		case SeverityCrit:
			crit++
			status = sdk.StatusCrit
		case SeverityWarn:
			warn++
			if status != sdk.StatusCrit {
				status = sdk.StatusWarn
			}
		case SeverityInfo:
			info++
			if status == sdk.StatusOK {
				status = sdk.StatusInfo
			}
		}
	}

	var msg string
	if len(data.Findings) == 0 {
		msg = fmt.Sprintf("Delegation of %s is healthy", data.DelegatedFQDN)
	} else {
		msg = fmt.Sprintf("Delegation of %s: %d critical, %d warning, %d info", data.DelegatedFQDN, crit, warn, info)
	}

	return sdk.CheckState{
		Status:  status,
		Message: msg,
		Code:    "delegation_result",
		Meta: map[string]any{
			"findings":       data.Findings,
			"delegated_fqdn": data.DelegatedFQDN,
			"parent_zone":    data.ParentZone,
			"advertised_ns":  data.AdvertisedNS,
			"parent_ds":      data.ParentDS,
			"child_serials":  data.ChildSerials,
		},
	}
}