package main

import (
	_ "embed"
	"encoding/json"
	"io/ioutil"
	"time"

	"github.com/tidwall/pretty"
)

//go:embed config.sample.json
var cfgSample []byte

type ServerConfig struct {
	Addr   string `json:"addr"`
	Passwd string `json:"passwd"`
}

type TelegramConfig struct {
	AdminID int64  `json:"admin_id"`
	ChatID  int64  `json:"chat_id"`
	URL     string `json:"url"`
	Token   string `json:"token"`
}

type GameConfig struct {
	TimeZone          string        `json:"timezone"`
	DailyAllotment    time.Duration `json:"daily_allotment"`
	StartingAllotment time.Duration `json:"starting_allotment"`
	Threshold         time.Duration `json:"threshold"`
	StartDate         time.Time     `json:"start_date"`
}

type ClientConfig struct {
	UserID    int           `json:"user_id"`
	Username  string        `json:"username"`
	Online    bool          `json:"online"`
	TimeLeft  time.Duration `json:"time_left"`
	CompanyID uint8         `json:"company_id`
}

type Config struct {
	Server   *ServerConfig         `json:"server"`
	Telegram *TelegramConfig       `json:"telegram"`
	Game     *GameConfig           `json:"game"`
	Clients  map[int]*ClientConfig `json:"clients"`
}

// Init values for a config based on package defaults
func (c *Config) Init() error {
	err := json.Unmarshal(cfgSample, &c)
	c.Clients = make(map[int]*ClientConfig)
	if err != nil {
		return err
	}
	return nil
}

// Load config values from a given file
func (c *Config) Load(path string) error {
	err := c.Init()
	if err != nil {
		return err
	}

	b, err := ioutil.ReadFile(path)
	if err != nil {
		return c.Save(path)
	}

	err = json.Unmarshal(b, &c)
	if err != nil {
		return err
	}

	return c.Save(path)
}

// Save config values to a given file
func (c *Config) Save(path string) error {
	b, err := c.Export()
	if err != nil {
		return nil
	}

	err = ioutil.WriteFile(path, b, 0644)

	return err
}

// Export config values as a bytestream
func (c *Config) Export() ([]byte, error) {
	b, err := json.Marshal(c)
	if err != nil {
		return b, err
	}
	return pretty.Pretty(b), nil

}

func (c *Config) CompanyIsRegistered(id uint8) bool {
	for _, cc := range c.Clients {
		if cc.CompanyID == id {
			return true
		}
	}
	return false
}

func (c *Config) GetCompanyClient(id uint8) *ClientConfig {
	for _, cc := range c.Clients {
		if cc.CompanyID == id {
			return cc
		}
	}
	return nil
}