package cmdEnv

import (
	"fmt"
	"kode-creator/config"
	"kode-creator/configFile"
	"os/exec"

	"kode-creator/utils"
	"os"
	"strconv"
	"strings"

	"github.com/gookit/color"
	"github.com/spf13/cobra"
)

// initailize global config
var CfgGlobal *config.Config // Declare a global variable for config

// init configuration for this package
func InitConfig(config *config.Config) {
	CfgGlobal = config // Assign the passed config to the global variable
}

var EnvCmd = &cobra.Command{
	Use:   "env",
	Short: "Manage ENVIRONMENT variables",
	Long:  `A simple CLI option to manage environment variables`,
	Run: func(cmd *cobra.Command, args []string) {

		// Start Env command
		startEnvVar(cmd, args)

	},
}

func startEnvVar(cmd *cobra.Command, args []string) {

	CfgGlobal.DebugPrintConfig("Function StartEnvVar")

	// declare map listPaths
	var ListPaths map[string]string

	// initialize command environment
	CfgGlobal.InitCmdEnv(cmd, args)

	CfgGlobal.DebugPrintConfig("Function StartEnvVar")

	// check if env flag EnvVariablesListFlag is set
	if CfgGlobal.GetEnvListFlag() {

		if !CfgGlobal.GetJsonFlag() {
			if CfgGlobal.GetEnvFilterFlag() {
				fmt.Println("with filter")
				printEnvVariablesFilter(CfgGlobal.GetEnvFilter(), CfgGlobal.GetEnvShowAllFlag())
			} else {
				printEnvVariables()
			}
		} else {

			json, err := createJsonAllEnvVar(CfgGlobal.GetEnvFilter(), CfgGlobal.GetEnvShowAllFlag())
			if err != nil {
				fmt.Println("Error:", err)
				return
			}
			fmt.Println(json)
		}

		// check if env flag EnvVariablesSetFlag is set
	} else if CfgGlobal.GetEnvSetFlag() {

		// if key and value are not empty
		if CfgGlobal.GetEnvKey() != "" && CfgGlobal.GetEnvValue() != "" {

			// set environment variable with key and value permanently
			if utils.IsWindows() {
				createEnvVariableWindows(CfgGlobal.GetEnvKey(), CfgGlobal.GetEnvValue())
			} else {
				createEnvVariableLinux(CfgGlobal.GetEnvKey(), CfgGlobal.GetEnvValue())
			}

			utils.PrintHeader()
			color.Green.Println("\n   S E T   E N V I R O N M E N T   V A R I A B L E   ")
			color.Yellow.Println(utils.CreateLine(15))
			color.Green.Println("Key: " + CfgGlobal.GetEnvKey())
			color.Green.Println("Value: " + CfgGlobal.GetEnvValue())
			// get all environment variables
			printEnvVariables()

			color.Yellow.Println(utils.CreateLine(15))

		} else {
			utils.PrintHeader()
			color.Green.Println("\n   S E T   E N V I R O N M E N T   V A R I A B L E   ")
			color.Yellow.Println(utils.CreateLine(15))
			color.Red.Println("Error: key and value are required")
			fmt.Println("\nExample: kode-creator env -s -k KEY -v VALUE")
			color.Yellow.Println(utils.CreateLine(15))
			return
		}

		// check if env flag EnvVariablesYmlFlag is set
	} else if CfgGlobal.GetEnvYmlFileFlag() {
		cfgYmlFile := configFile.LoadConfigFile(CfgGlobal)

		ListCategories, err := cfgYmlFile.GetListCategory()
		if err != nil {
			fmt.Println("Error:", err)
			return
		}
		if !CfgGlobal.GetJsonFlag() {
			utils.PrintHeader()
			fmt.Println("\n   L I S T   E N V   V A R S   F R O M   Y M L   F I L E   ")
			fmt.Println(utils.CreateLine(11))

			for _, category := range ListCategories {
				// fmt.Println("Category: " + category)

				ListPaths, err = cfgYmlFile.GetAllEnvironmentVariables(category)
				if err != nil {
					fmt.Println("Error:", err)
					return
				}

				// if category flag is set
				if CfgGlobal.GetEnvCategoryFlag() {

					if CfgGlobal.GetEnvCategoryInfo() == category {
						// if ListPaths is no empty
						if len(ListPaths) > 0 {
							fmt.Println(color.FgLightGreen.Render("\nCategory: " + category))
							fmt.Println(utils.CreateLine(3))

							// print path and value
							nb := 1

							for path, value := range ListPaths {
								utils.PrintTreeElement(nb, path, value)
								nb++
							}
						}
					}
				} else {

					// if ListPaths is no empty
					if len(ListPaths) > 0 {
						fmt.Println(color.FgLightGreen.Render("\nCategory: " + category))
						fmt.Println(utils.CreateLine(3))

						// print path and value
						nb := 1

						for path, value := range ListPaths {
							utils.PrintTreeElement(nb, path, value)
							nb++
						}
					}

				}

			}
			fmt.Println(utils.CreateLine(3))

		} else {
			// Execute function createJsonAllEnvVarYml : create json output for all environment variables with category
			jsonOutput, err := createJsonAllEnvVarYml(cfgYmlFile, CfgGlobal.GetEnvCategoryInfo())
			if err != nil {
				fmt.Println("Error:", err)
				return
			}
			fmt.Println(jsonOutput)
		}

	} else {
		utils.PrintHeader()
		cmd.Help()
		color.Yellow.Println(utils.CreateLine(15))
	}

}

func createJsonAllEnvVar(filter string, showAll bool) (string, error) {

	//var jsonOutput string
	jsonOutput := ""

	// var map listPaths
	ListPaths := make(map[string]string)

	// var pair []string

	for _, e := range os.Environ() {
		// split key and value
		pair := strings.Split(e, "=")

		// fmt.Println(pair[1])
		if showAll {
			ListPaths[string(pair[0])] = string(pair[1])
		} else {
			if (strings.Contains(pair[0], filter)) || (strings.Contains(pair[1], filter)) {
				ListPaths[string(pair[0])] = string(pair[1])
			}
		}

	}

	// loop over all environment variables to create json output
	jsonOutput += "{\n"
	for path, value := range ListPaths {
		jsonOutput += "  \"" + path + "\": \"" + value + "\",\n"
	}
	jsonOutput = strings.TrimSuffix(jsonOutput, ",\n")
	jsonOutput += "\n}\n"

	return utils.DoubleBackSlash(jsonOutput), nil

}

// The function `createJsonAllEnvVar` creates a JSON string containing all environment variables from a
// given configuration YAML file.
func createJsonAllEnvVarYml(cfgYmlFile *configFile.ConfigYml, categoryInfo string) (string, error) {

	//var jsonOutput string
	jsonOutput := ""

	ListCategories, err := cfgYmlFile.GetListCategory()
	if err != nil {
		fmt.Println("Error:", err)
		return "", err
	}

	var isCategoryInfoPresent bool = false

	// check if categoryInfo includes in ListCategories
	for _, category := range ListCategories {
		if category == categoryInfo {
			isCategoryInfoPresent = true
			break
		}
	}

	if categoryInfo == "" {

		// loop over all categories
		jsonOutput += "{\n"
		for _, category := range ListCategories {

			ListPaths, err := cfgYmlFile.GetAllEnvironmentVariables(category)
			if err != nil {
				fmt.Println("Error:", err)
				return "", err
			}

			// if ListPaths is no empty
			if len(ListPaths) > 0 {

				// add category as array and list of environment variables to jsonOutput

				jsonOutput += "  \"" + category + "\": [\n"

				// loop over all environment variables
				for path, value := range ListPaths {
					jsonOutput += "    {\n"
					jsonOutput += "      \"" + path + "\": \"" + value + "\"\n"
					jsonOutput += "    },\n"
				}

				// remove last comma
				jsonOutput = strings.TrimSuffix(jsonOutput, ",\n")

				jsonOutput += "\n  ],\n"

			}

		}
		jsonOutput = strings.TrimSuffix(jsonOutput, ",\n")
		jsonOutput += "\n}\n"

	} else {

		// loop over all categories
		if isCategoryInfoPresent {
			jsonOutput += "{\n"
			for _, category := range ListCategories {

				ListPaths, err := cfgYmlFile.GetAllEnvironmentVariables(category)
				if err != nil {
					fmt.Println("Error:", err)
					return "", err
				}

				if category == categoryInfo {
					// if ListPaths is no empty
					if len(ListPaths) > 0 {

						// add category as array and list of environment variables to jsonOutput

						jsonOutput += "  \"" + category + "\": [\n"

						// loop over all environment variables
						for path, value := range ListPaths {
							jsonOutput += "    {\n"
							jsonOutput += "      \"" + path + "\": \"" + value + "\"\n"
							jsonOutput += "    },\n"
						}

						// remove last comma
						jsonOutput = strings.TrimSuffix(jsonOutput, ",\n")

						jsonOutput += "\n  ],\n"

					}
				}
			}

			jsonOutput = strings.TrimSuffix(jsonOutput, ",\n")
			jsonOutput += "\n}\n"
		}

	}
	return utils.DoubleBackSlash(jsonOutput), nil

}

func listEnvVariables() error {

	if CfgGlobal.GetEnvCmd().EnvVariablesFilterFlag {
		fmt.Println("GetEnvVariablesListFlag: " + strconv.FormatBool(CfgGlobal.GetEnvCmd().EnvVariablesListFlag))
		printEnvVariables()
	}

	return nil

}

func printEnvVariables() {

	// print header if json flag is not set
	if !CfgGlobal.GetJsonFlag() {
		utils.PrintHeader()
	}

	color.Green.Println("E n v i r o n m e n t   v a r i a b l e s")
	color.Yellow.Println(utils.CreateLine(15))

	nb := 1

	// loop over all environment variables
	for _, e := range os.Environ() {
		// split key and value
		pair := strings.Split(e, "=")
		utils.PrintTreeElement(nb, pair[0], pair[1])
		nb++
	}

	color.Yellow.Println(utils.CreateLine(15))
}

func printEnvVariablesFilter(filter string, showAll bool) {

	utils.PrintHeader()
	color.Green.Println("F i l t e r   E n v i r o n m e n t   v a r i a b l e s")
	color.Yellow.Println(utils.CreateLine(15))

	nb := 1
	var str2, str3 string
	var addToPrint bool = false

	// loop over all environment variables
	for _, e := range os.Environ() {
		// split key and value
		pair := strings.Split(e, "=")
		if strings.Contains(pair[0], filter) {
			str2 = utils.ColorizeSubStrRed(pair[0], filter)
			str3 = color.Green.Sprint(pair[1])
			addToPrint = true
		} else if strings.Contains(pair[1], filter) {
			str2 = color.Green.Sprint(pair[0])
			str3 = utils.ColorizeSubStrRed(pair[1], filter)
			addToPrint = true
		} else {
			if showAll {
				str2 = utils.ColorizeString(pair[0], color.Green)
				str3 = utils.ColorizeString(pair[1], color.LightWhite)
				addToPrint = true
			}
		}
		if addToPrint {
			utils.PrintTreeElement(nb, str2, str3)
		}

		addToPrint = false
		nb++

	}
	color.Yellow.Println(utils.CreateLine(15))
}

// create a permanent environment variable on Windows with key and value
func createEnvVariableWindows(key string, value string) error {

	// detect if OS is Windows
	if utils.IsWindows() {

		// set environment variable with key and value permanently
		// setx Key "Value"
		cmd := exec.Command("cmd", "/C", "setx", key, value)
		err := cmd.Run()
		if err != nil {
			color.Red.Println("Error:", err)
		}

	}
	return nil

}

// create a permanent environment variable on Linux with key and value
func createEnvVariableLinux(key string, value string) error {

	// detect if OS is Linux
	if !utils.IsWindows() {

		// set environment variable with key and value permanently
		// setx Key "Value"
		cmd := exec.Command("export", key+"="+value)
		err := cmd.Run()
		if err != nil {
			color.Red.Println("Error:", err)
		}

	}
	return nil

}

// delete a permanent environment variable on Windows with key
func deleteEnvVariableWindows(key string) error {

	// detect if OS is Windows
	if utils.IsWindows() {

		// set environment variable with key and value permanently
		// setx Key "Value"
		cmd := exec.Command("cmd", "/C", "setx", key, "")
		err := cmd.Run()
		if err != nil {
			color.Red.Println("Error:", err)
		}

	}
	return nil

}

// delete a permanent environment variable on Linux with key
func deleteEnvVariableLinux(key string) error {

	// detect if OS is Linux
	if !utils.IsWindows() {

		// set environment variable with key and value permanently
		// setx Key "Value"
		cmd := exec.Command("unset", key)
		err := cmd.Run()
		if err != nil {
			color.Red.Println("Error:", err)
		}

	}
	return nil

}