// Package config defines the format of the configuration file
package config

import (
	"fmt"
	"os"
	"regexp"

	"gopkg.in/yaml.v3"
)

type (
	// Config defines each entry for the File matching a remote and
	// containing a configuration to apply for the repo
	Config struct {
		Match      string `yaml:"match"`
		EMail      string `yaml:"email"`
		Keyname    string `json:"keyname"`
		SigningKey string `json:"signingkey"`
		CommitOpts string `json:"commit-opts"`
	}

	// File holds a list of Config entries
	File []Config
)

// Load reads the configuration file and parses it
func Load(fn string) (f File, err error) {
	fh, err := os.Open(fn) //#nosec:G304 // Intended
	if err != nil {
		return f, fmt.Errorf("opening config: %w", err)
	}
	defer fh.Close() //nolint:errcheck // Will be closed by tool exec

	if err = yaml.NewDecoder(fh).Decode(&f); err != nil {
		return f, fmt.Errorf("decoding config: %w", err)
	}

	return f, nil
}

// ConfigForRemote returns the first Config matching the given remote
// or nil if none matched
func (f File) ConfigForRemote(remote string) *Config {
	for i := range f {
		conf := f[i]

		if !regexp.MustCompile(conf.Match).MatchString(remote) {
			continue
		}

		return &conf
	}

	return nil
}