package main

import (
	"encoding/json"

	"src.opensuse.org/autogits/common"
)

//go:generate mockgen -source=maintainership.go -destination=mock/maintainership.go -typed

const ProjectKey = ""

type MaintainershipMap map[string][]string

type GiteaMaintainershipInterface interface {
	FetchMaintainershipFile(org, prj, branch string) ([]byte, error)
}

func parseMaintainerhipData(gitea GiteaMaintainershipInterface, org, pkg, branch string) (MaintainershipMap, error) {
	data, err := gitea.FetchMaintainershipFile(org, pkg, branch)
	if err != nil || data == nil {
		return nil, err
	}

	maintainer := make(MaintainershipMap)
	if err := json.Unmarshal(data, &maintainer); err != nil {
		return nil, err
	}

	return maintainer, nil
}

func MaintainerListForProject(gitea GiteaMaintainershipInterface, org, branch string) ([]string, error) {
	maintainer, err := parseMaintainerhipData(gitea, org, common.DefaultGitPrj, branch)
	if err != nil {
		return nil, err
	}

	m, found := maintainer[ProjectKey]
	if !found {
		return nil, nil
	}

	return m, nil
}

func MaintainerListForPackage(gitea GiteaMaintainershipInterface, org, pkg, branch string) ([]string, error) {
	maintainer, err := parseMaintainerhipData(gitea, org, pkg, branch)
	if err != nil {
		return nil, err
	}

	pkgMaintainers := maintainer[pkg]
	prjMaintainers := maintainer[ProjectKey]

prjMaintainer:
	for _, prjm := range prjMaintainers {
		for i := range pkgMaintainers {
			if pkgMaintainers[i] == prjm {
				continue prjMaintainer
			}
		}
		pkgMaintainers = append(pkgMaintainers, prjm)
	}

	return pkgMaintainers, nil
}