package server

import (
	"encoding/json"
	"errors"
	"os"
	"strings"
)

// Config is the struct created by the server's config.json
type Config struct {
	View struct {
		Title string `json:"title"`
	} `json:"view"`

	DB struct {
		Username string `json:"username"`
		Password string `json:"password"`
		Database string `json:"database"`
	} `json:"db"`

	Server struct {
		Host string `json:"host"`
		Port int    `json:"port"`
		UI   string `json:"ui"`
	} `json:"server"`

	Wiki struct {
		URL      string `json:"url"`
		Username string `json:"username"`
		Password string `json:"password"`
	} `json:"Wiki"`

	Test struct {
		Enabled  bool   `json:"enabled"`
		Username string `json:"username"`
		Password string `json:"password"`
	} `json:"Test"`
}

// Load loads the config file from the paths, starting with the first path.
// If it fails to load any of them, it will return false.
func (config *Config) Load(paths ...string) error {
	for _, path := range paths {
		// Open a file, or continue if it doesn't exist
		file, err := os.Open(path)
		if err != nil {
			continue
		}

		// JSON parsing errors should not cause it to skip to the next file.
		// That's given me enough grief in the past because JSON is a fickle
		// format for human-editable config files
		err = json.NewDecoder(file).Decode(&config)
		if err != nil {
			return err
		}

		return nil
	}

	return errors.New("No configuration files found in either: " + strings.Join(paths, ","))
}