package common

import (
	"errors"
	"strings"
)

var UnknownParser error = errors.New("Cannot parse path")

type PRConflictResolver interface {
	/*
		stage_content -> { merge_base (stage1), head (stage2), merge_head (stage3) }
	*/
	Resolve(path string, stage_contents [3]string) error
}

var resolvers []PRConflictResolver = []PRConflictResolver{
	&submodule_conflict_resolver{},
}

func ResolveMergeConflict(path string, file_contents [3]string) error {
	for _, r := range resolvers {
		if err := r.Resolve(path, file_contents); err != UnknownParser {
			return err
		}
	}

	return UnknownParser
}

type submodule_conflict_resolver struct{}

func (*submodule_conflict_resolver) Resolve(path string, stage [3]string) error {
	if path != ".gitmodules" {
		return UnknownParser
	}
	return UnknownParser
}

type changes_file_resolver struct{}

func (*changes_file_resolver) Resolve(path string, stage [3]string) error {
	if !strings.HasSuffix(path, ".changes") {
		return UnknownParser
	}

	return UnknownParser
}