package config

import (
	"errors"
	"fmt"
	"os"
	"strings"

	"gopkg.in/yaml.v3"
)

func GetRepositoryConfig(data []byte, fileExtension string) (Configuration, error) {

	var config Configuration
	var err error

	data = []byte(os.ExpandEnv(string(data)))

	switch fileExtension {
	case "yaml":
		err = yaml.Unmarshal(data, &config)
	default:
		return Configuration{}, errors.New(errNotSupportedType)
	}

	if err != nil {
		return Configuration{}, err
	}

	if config.Workspace == "" {

		return Configuration{}, errors.New(errMissingWorkspaceField)
	}
	// Get counters to check if name or dest values are not duplicated
	nameFieldCounter := make(map[string][]int)
	destFieldCounter := make(map[string][]int)

	for index, repo := range config.Repositories {
		if repo.Src == "" {
			errorMessage := fmt.Sprintf(errMissingSrcField, index)
			return Configuration{}, errors.New(errorMessage)
		}
		if repo.Name == "" {
			splitGit := strings.Split(repo.Src, "/")
			nameWithExtension := splitGit[len(splitGit)-1]
			name := strings.Split(nameWithExtension, ".")[0]
			config.Repositories[index].Name = name
		}
		if repo.Dest == "" {
			config.Repositories[index].Dest = config.Repositories[index].Name
		}
		nameFieldCounter[config.Repositories[index].Name] = append(nameFieldCounter[config.Repositories[index].Name], index)
		destFieldCounter[config.Repositories[index].Dest] = append(destFieldCounter[config.Repositories[index].Dest], index)
	}

	for rowId, items := range nameFieldCounter {
		if len(items) != 1 {
			return Configuration{}, getDuplicateFieldError("name", rowId, items)
		}
	}

	for rowId, items := range destFieldCounter {
		if len(items) != 1 {
			return Configuration{}, getDuplicateFieldError("dest", rowId, items)
		}
	}

	return config, err
}