package config

/*
Load.go contains methods to load values from config, flags and env.
*/

import (
	"FRMS/internal/pkg/logging"
	"errors"
	"fmt"
	"strconv"
	"strings"

	"github.com/spf13/viper"
	//"os"
	//"log"
	//"os/exec"
	//"bytes"
)

func NewConfig(name string) (Config, error) {
	// returns a Config Structure of assocaited name
	return C, Load(name)
}

type ConfigStruct interface {
	// structure to do demarshall config into
	LoadFile(string) error
}

func LoadConfigFile(fname string, strct ConfigStruct) error {
	// Demarshalls a given filename into the struct
	// returns nil if successful
	logging.Debug(logging.DStart, "Loading config for %s", fname)
	viper.SetConfigName(fname)
	viper.SetConfigType("yaml")
	viper.AddConfigPath("/etc/frms/config")

	// unmarshalling
	if err := viper.ReadInConfig(); err != nil {
		return err
	}

	logging.Debug(logging.DStart, "CON Loaded configs from %v", viper.ConfigFileUsed())
	if err = viper.Unmarshal(strct); err != nil {
		logging.Debug(logging.DError, "Cannot unmarshall %v", err)
		return err
	}
	fmt.Printf("Outcome: %#v\n \n", C)
	// unmarshalled at this point
}

////

func LoadConfig() Config {
	return C
}

func (c *ServerConf) GetURL() (string, error) {
	c.RLock()
	defer c.RUnlock()
	return C.Server.URL, nil
}

func (c *ServerConf) GetOrg() (string, error) {
	c.RLock()
	defer c.RUnlock()
	return c.Server.Orginization, nil
}

func (c *ServerConf) GetPort(port string) (int, error) {
	c.RLock()
	defer c.RUnlock()
	portString, ok := c.Server.Ports[port]
	if !ok {
		portEnv := strings.ToUpper(port) + "_PORT"
		return 0, fmt.Errorf("%s port doesnt exist! Please set using env %s=####", port, portEnv)
	}
	// returns int, err
	//return strconv.Atoi(portString)
	return portString, nil
}

func (c *ServerConf) GetServerToken() (string, error) {
	c.RLock()
	defer c.RUnlock()
	return c.Server.Token, nil
}

func (c *ServerConf) GetReactorClient(id uint32) (string, string, error) {
	c.RLock()
	defer c.RUnlock()
	idString := strconv.FormatUint(uint64(id), 10)
	if r, ok := c.Reactors[idString]; ok {
		return r.Bucket, r.Token, nil
	}
	return "", "", fmt.Errorf("reactor %v config doesnt exist", id)
}

// setters
func (c *ServerConf) UpdateURL(url string) error {
	c.Lock()
	defer c.Unlock()
	if url == "" {
		return errors.New("string cannot be empty")
	}
	c.Server.URL = url
	viper.Set("server.db-url", url)
	return viper.WriteConfigAs(viper.ConfigFileUsed())
}

func (c *ServerConf) UpdateOrg(org string) error {
	c.Lock()
	defer c.Unlock()
	if org == "" {
		return errors.New("string cannot be empty")
	}
	c.Server.Orginization = org
	viper.Set("server.db-org", org)
	return viper.WriteConfigAs(viper.ConfigFileUsed())
}

func (c *ServerConf) UpdatePort(pName string, port int) error {
	c.Lock()
	defer c.Unlock()
	if port < 1024 || port > 65535 {
		// OOB
		return fmt.Errorf("Port %d out of bounds! [1024,65535]", port)
	}
	if c.Server.Ports == nil {
		c.Server.Ports = make(map[string]int)
	}
	c.Server.Ports[pName] = port
	pname := fmt.Sprintf("server.ports.%s", pName)
	viper.Set(pname, port)
	return viper.WriteConfigAs(viper.ConfigFileUsed())
}

func (c *ServerConf) UpdateServerToken(token string) error {
	c.Lock()
	defer c.Unlock()
	if token == "" {
		return errors.New("String cannot be empty!")
	}
	c.Server.Token = token
	viper.Set("server.token", token)
	return viper.WriteConfigAs(viper.ConfigFileUsed())
}

func (c *ServerConf) UpdateReactorClient(id uint32, bucket, token string) error {
	c.Lock()
	c.Unlock()
	sid := strconv.FormatUint(uint64(id), 10)
	if token == "" || bucket == "" {
		return errors.New("String cannot be empty!")
	}
	if reactor, ok := c.Reactors[sid]; !ok {
		c.Reactors[sid] = ReactorConfig{Token: token, Bucket: bucket, Id: id}
	} else {
		reactor.Bucket = bucket
		reactor.Token = token
		c.Reactors[sid] = reactor
	}
	reactorbucket := fmt.Sprintf("%s.db-bucket", id)
	reactortoken := fmt.Sprintf("%s.db-token", id)
	viper.Set(reactorbucket, bucket)
	viper.Set(reactortoken, token)
	return viper.WriteConfigAs(viper.ConfigFileUsed())
}

func (c *ServerConf) Store() error {
	return viper.WriteConfigAs(viper.ConfigFileUsed())
}