/** 
 * @author Robert Strutts <Robert@TryingToScale.com>
 * @copyright Copyright (c) 2022, Robert Strutts.
 * @license https://mit-license.org/
 */

package main

import (
	"flag"
	"fmt"
	"io"
	"log"
	"os"
	"path/filepath"
	"text/template"
)

const version = "1.0.0"

var root string
var app_dir string
var method_name string
var main_file string
var root_in string
var verbose bool

type PhpTemplate struct {
	Root      string
	Subfolder string
	File      string
	Method    string
}

// Declare type pointer to a template
var temp_ctrl *template.Template
var temp_inputs *template.Template
var temp_logic *template.Template
var temp_models *template.Template
var temp_outputs *template.Template
var temp_views *template.Template
var php_tpl PhpTemplate

func init_template() {
	// template.Must takes the reponse of template.ParseFiles and does error checking
	temp_ctrl = template.Must(template.ParseFiles(root + "/go_text_templates/ctrl.txt"))
	temp_inputs = template.Must(template.ParseFiles(root + "/go_text_templates/inputs.txt"))
	temp_logic = template.Must(template.ParseFiles(root + "/go_text_templates/logic.txt"))
	temp_models = template.Must(template.ParseFiles(root + "/go_text_templates/models.txt"))
	temp_outputs = template.Must(template.ParseFiles(root + "/go_text_templates/outputs.txt"))
	temp_views = template.Must(template.ParseFiles(root + "/go_text_templates/views.txt"))
}

func make_a_dir(mydir string) {
	if _, err := os.Stat(root + "/" + mydir); os.IsNotExist(err) {
		os.Mkdir(root+"/"+mydir, 0775)
	}
}

func use_file(filename string) io.Writer {
	if verbose {
		fmt.Println("------------")
		return os.Stdout
	}

	_, err_fnf := os.Stat(root + filename)
	if !os.IsNotExist(err_fnf) {
		log.Fatalf("Sorry, %s already exists!", root+filename)
	}

	file, err := os.Create(root + filename)
	if err != nil {
		log.Fatal(err)
	}
	return file
}

func ctrl() {
	mydir := "/controllers/" + app_dir
	make_a_dir(mydir)
	file := use_file(mydir + "/" + main_file + "_ctrl.php")

	temp_err := temp_ctrl.Execute(file, php_tpl)
	if temp_err != nil {
		log.Fatalln(temp_err)
	}
}

func inputs() {
	mydir := "/inputs/" + app_dir
	make_a_dir(mydir)
	file := use_file(mydir + "/" + main_file + "_in.php")

	temp_err := temp_inputs.Execute(file, php_tpl)
	if temp_err != nil {
		log.Fatalln(temp_err)
	}
}

func logic() {
	mydir := "/logic/" + app_dir
	make_a_dir(mydir)
	file := use_file(mydir + "/" + main_file + "_logic.php")

	temp_err := temp_logic.Execute(file, php_tpl)
	if temp_err != nil {
		log.Fatalln(temp_err)
	}
}

func models() {
	mydir := "/models/" + app_dir
	make_a_dir(mydir)
	file := use_file(mydir + "/" + main_file + "_model.php")

	temp_err := temp_models.Execute(file, php_tpl)
	if temp_err != nil {
		log.Fatalln(temp_err)
	}
}

func outputs() {
	mydir := "/outputs/" + app_dir
	make_a_dir(mydir)
	file := use_file(mydir + "/" + main_file + "_out.php")

	temp_err := temp_outputs.Execute(file, php_tpl)
	if temp_err != nil {
		log.Fatalln(temp_err)
	}
}

func views() {
	mydir := "/views/default/" + app_dir
	make_a_dir(mydir)
	file := use_file(mydir + "/" + main_file + "_" + method_name + "_view.php")

	temp_err := temp_views.Execute(file, php_tpl)
	if temp_err != nil {
		log.Fatalln(temp_err)
	}
}

func grab_input() {
	var sub_in string
	var file_in string
	var method_in string

	fmt.Print("Enter SubFolder (app): ")
	fmt.Scanln(&sub_in)
	if sub_in == "" {
		sub_in = "app"
	}

	fmt.Print("Enter File (home): ")
	fmt.Scanln(&file_in)
	if file_in == "" {
		file_in = "home"
	}

	fmt.Print("Enter Method (index): ")
	fmt.Scanln(&method_in)
	if method_in == "" {
		method_in = "index"
	}

	app_dir = sub_in
	main_file = file_in
	method_name = method_in

	php_tpl = PhpTemplate{
		Root:      root_in,
		Subfolder: sub_in,
		File:      file_in,
		Method:    method_in,
	}

}

func usage() {
	progName := filepath.Base(os.Args[0])
	fmt.Printf(`%s version %s, (c) 2022 Robert Strutts
	
	Usage:
	%s [-www] [-app] [-root] [-v]
		-h 	Print this help message.
		-v	Verbose mode, Display output instead of making files.
		-www	Web Dir IE /var/www
		-app	App Dir IE tts_project/src
		-root	Root Dir IE mockup
`, progName, version, progName)
}

func main() {
	help := flag.Bool("h", false, "Help Page")
	web_path := flag.String("www", "/var/www", "Web Dir")
	app_path := flag.String("app", "tts_project/src", "App Dir")
	root_path := flag.String("root", "mockup", "Root Dir")
	v := flag.Bool("v", false, "Verbose output")
	flag.Parse()

	if *help {
		usage()
		return
	}

	verbose = *v

	root = *web_path + "/" + *app_path + "/" + *root_path
	root_in = *root_path

	_, err := os.Stat(root)
	if os.IsNotExist(err) {
		log.Fatal("Missing root folders: mkdir -p " + root)
	}
	fmt.Println("Please wait...")

	init_template()
	grab_input()
	ctrl()
	inputs()
	logic()
	models()
	outputs()
	views()
}