package ezconf

import (
	"errors"
	"fmt"
	"gopkg.in/ini.v1"
	"os"
	"strings"
)

type Configuration struct {
	fileLocation string
	file         *ini.File
}

func NewConfiguration(fileLocation string) *Configuration {
	conf := new(Configuration)
	conf.fileLocation = fileLocation
	conf.load()
	return conf
}

func (config *Configuration) getSection(sectionName string) *ini.Section {
	section, err := config.file.GetSection(sectionName)
	if err != nil {
		fmt.Printf("Error getting section %v in config: %v", sectionName, err)
		os.Exit(1)
	}
	return section
}

func getChildSection(section *ini.Section, childSectionName string) (childSection *ini.Section, err error) {
	childSections := section.ChildSections()
	for _, childSection := range childSections {
		if childSection.Name() == childSectionName {
			return childSection, nil
		}
	}
	return nil, errors.New("subsection " + childSectionName + " not found")
}

func (config *Configuration) GetKey(path string) *ini.Key {
	splitPaths := strings.Split(path, ".")
	if len(splitPaths) == 1 {
		splitPaths = append([]string{"."}, splitPaths...)
	}
	section := config.getSection(splitPaths[0])
	var key *ini.Key
	var err error
	if len(splitPaths) > 2 {
		tempSection := section
		for i := 0; i < len(splitPaths)-1; i++ {
			tempSection, err = getChildSection(tempSection, splitPaths[i])
			if err != nil {
				fmt.Printf("Error getting child section %v: %v", splitPaths[i], err)
				os.Exit(1)
			}
			if len(splitPaths) == i+1 {
				key, err = tempSection.GetKey(splitPaths[i+1])
				if err != nil {
					fmt.Printf("Error getting key %v: %v", splitPaths[i+1], err)
				}
			}
		}
	} else {
		key, err = section.GetKey(splitPaths[1])
		if err != nil {
			fmt.Printf("Error getting key %v: %v", splitPaths[1], err)
		}
	}
	return key
}

func (config *Configuration) GetString(path string) string {
	return config.GetKey(path).String()
}

func (config *Configuration) GetStrings(path string) []string {
	return config.GetKey(path).Strings(",")
}

func (config *Configuration) GetInt(path string) int {
	var i int
	var err error
	i, err = config.GetKey(path).Int()
	if err != nil {
		fmt.Printf("Error parsing integer: %v", err)
		os.Exit(1)
	}
	return i
}

func (config *Configuration) GetInts(path string) []int {
	return config.GetKey(path).Ints(",")
}

func (config *Configuration) GetUInt(path string) uint {
	var i uint
	var err error
	i, err = config.GetKey(path).Uint()
	if err != nil {
		fmt.Printf("Error parsing integer: %v", err)
		os.Exit(1)
	}
	return i
}

func (config *Configuration) GetUInts(path string) []uint {
	return config.GetKey(path).Uints(",")
}

func (config *Configuration) GetFloat(path string) float64 {
	var f float64
	var err error
	f, err = config.GetKey(path).Float64()
	if err != nil {
		fmt.Printf("Error parsing float: %v", err)
		os.Exit(1)
	}
	return f
}

func (config *Configuration) GetFloats(path string) []float64 {
	return config.GetKey(path).Float64s(",")
}

func (config *Configuration) GetBoolean(path string) bool {
	var b bool
	var err error
	b, err = config.GetKey(path).Bool()
	if err != nil {
		fmt.Printf("Error parsingn bool: %v", err)
		os.Exit(1)
	}
	return b
}

func (config *Configuration) GetBooleans(path string) []bool {
	return config.GetKey(path).Bools(",")
}

func (config *Configuration) load() {
	var err error = nil
	config.file, err = ini.Load(config.fileLocation)
	if err != nil {
		fmt.Printf("Failed to open configuration file: %v", err)
		os.Exit(1)
	}
}

func (config *Configuration) Reload() {
	config.load()
}

func (config *Configuration) Save() {
	err := config.file.SaveTo(config.fileLocation)
	if err != nil {
		fmt.Printf("Failed to save configuration file: %v", err)
		os.Exit(1)
	}
}