/*
Copyright © 2020 NAME HERE <EMAIL ADDRESS>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package cmd

import (
	"encoding/json"
	"io/ioutil"

	//"encoding/json"
	"fmt"
	input "github.com/charmbracelet/bubbles/textinput"
	tea "github.com/charmbracelet/bubbletea"
	te "github.com/muesli/termenv"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	"log"
	"pgm/data"
	"pgm/logger"

	//"io/ioutil"
	//"log"
	"os"
	//"pgm/logger"
)

const focusedTextColor = "212"

var (
	focusedPrompt       = te.String("> ").Foreground(color("205")).String()
	blurredPrompt       = "> "
	color               = te.ColorProfile().Color
	focusedSubmitButton = "[ " + te.String("Submit").Foreground(color("205")).String() + " ]"
	blurredSubmitButton = "[ " + te.String("Submit").Foreground(color("240")).String() + " ]"
)


type dupeFileMsg string

type dbCfg struct {
	index        int
	dbFileName   input.Model
	hostName     input.Model
	dbName       input.Model
	userName     input.Model
	secret       input.Model
	submitButton string
}

// addCmd represents the add command
var addCmd = &cobra.Command{
	Use:   "add",
	Short: "A brief description of your command",
	Long: `A longer description that spans multiple lines and likely contains examples
and usage of using your command. For example:

Cobra is a CLI library for Go that empowers applications.
This application is a tool to generate the needed files
to quickly create a Cobra application.`,
	Run: func(cmd *cobra.Command, args []string) {
		result := make(chan string, 1)

		if err := tea.NewProgram(initialModel()).Start(); err != nil {
			fmt.Printf("could not start program: %s\n", err)
			os.Exit(1)
		}

		// Print out the final choice.
		if r := <-result; r != "" {
			fmt.Printf("\n---\nYou chose %s!\n", r)
		}
	},
}

func init() {
	rootCmd.AddCommand(addCmd)

	// Here you will define your flags and configuration settings.

	// Cobra supports Persistent Flags which will work for this command
	// and all subcommands, e.g.:
	// addCmd.PersistentFlags().String("foo", "", "A help for foo")

	// Cobra supports local flags which will only run when this command
	// is called directly, e.g.:
	// addCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
}


func (m dbCfg) Init() tea.Cmd {
	return tea.Batch(
		input.Blink(m.dbFileName),
		input.Blink(m.hostName),
		input.Blink(m.dbName),
		input.Blink(m.userName),
		input.Blink(m.secret),
	)
}



func (m dbCfg) View() string {
	s := "\n"

	inputs := []string{
		input.View(m.dbFileName),
		input.View(m.hostName),
		input.View(m.dbName),
		input.View(m.userName),
		input.View(m.secret),
	}

	for i := 0; i < len(inputs); i++ {
		s += inputs[i]
		if i < len(inputs)-1 {
			s += "\n"
		}
	}

	s += "\n\n" + m.submitButton + "\n"
	return s
}


func (m dbCfg) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	var cmd tea.Cmd

	switch msg := msg.(type) {
	case tea.KeyMsg:
		switch msg.String() {

		case "ctrl+c":
			return m, tea.Quit

		// Cycle between inputs
		case "tab", "shift+tab", "enter", "up", "down":

			inputs := []input.Model{
				m.dbFileName,
				m.hostName,
				m.dbName,
				m.userName,
				m.secret,
			}

			s := msg.String()

			// Did the user press enter while the submit button was focused?
			// If so, exit.
			if s == "enter" && m.index == len(inputs) {
				return m, tea.Quit
			}

			// Cycle indexes
			if s == "up" || s == "shift+tab" {
				m.index--
			} else {
				m.index++
			}

			if m.index > len(inputs) {
				m.index = 0
			} else if m.index < 0 {
				m.index = len(inputs)
			}

			for i := 0; i <= len(inputs)-1; i++ {
				if i == m.index {
					// Set focused state
					inputs[i].Focus()
					inputs[i].Prompt = focusedPrompt
					inputs[i].TextColor = focusedTextColor
					continue
				}
				// Remove focused state
				inputs[i].Blur()
				inputs[i].Prompt = blurredPrompt
				inputs[i].TextColor = ""
			}

			m.dbFileName = inputs[0]
			m.hostName = inputs[1]
			m.dbName = inputs[2]
			m.userName = inputs[3]
			m.secret = inputs[4]

			if m.index == len(inputs) {
				m.submitButton = focusedSubmitButton
			} else {
				m.submitButton = blurredSubmitButton
			}

			return m, nil
		}
	}

	// Handle character input and blinks
	m, cmd = updateInputs(msg, m)
	return m, cmd
}


func updateInputs(msg tea.Msg, m dbCfg) (dbCfg, tea.Cmd) {
	var (
		cmd  tea.Cmd
		cmds []tea.Cmd
	)

	m.dbFileName, cmd = input.Update(msg, m.dbFileName)
	cmds = append(cmds, cmd)

	m.hostName, cmd = input.Update(msg, m.hostName)
	cmds = append(cmds, cmd)

	m.dbName, cmd = input.Update(msg, m.dbName)
	cmds = append(cmds, cmd)

	m.userName, cmd = input.Update(msg, m.userName)
	cmds = append(cmds, cmd)

	m.secret, cmd = input.Update(msg, m.secret)

	return m, tea.Batch(cmds...)
}

func initialModel() dbCfg {
	dbFileName := input.NewModel()
	dbFileName.Placeholder = "database file name (no spaces)"
	dbFileName.Focus()


	hostName := input.NewModel()
	hostName.Placeholder = "hostname"

	dbName := input.NewModel()
	dbName.Placeholder = "database name on host"

	userName := input.NewModel()
	userName.Placeholder = "username"

	secret := input.NewModel()
	secret.Placeholder = "secret"

	return dbCfg{0, dbFileName, hostName, dbName, userName, secret, blurredSubmitButton}

}




// Writes configs to .pgm/hosts directory
func configWriter(t []input.Model){
	h := viper.GetString("hostsDir")
	var c data.HostDetails
	var fp string
	var cfg []byte
	c = data.HostDetails{t[4].Value(), t[1].Value(), t[2].Value(), t[3].Value()}
	cfgFileName := t[0].Value()
	if _, err := os.Stat(h + "/" + cfgFileName); os.IsNotExist(err) {
		fp = h + "/" + cfgFileName
	} else {
		e := "dupe"
		return dupeFileMsg(e)
	}
	_ = cfg
	f, err := os.Create(fp)
	if err != nil {
		log.Fatal("unable to create file: " + fp)
	}
	defer f.Close()
	if err != nil {
		log.Fatal("error writing to file: " + err.Error())
	}
	cfg, err = json.MarshalIndent(c, "", " ")
	if err != nil {
		log.Fatal(err)
	}
	logger.Logger("[LOG] writing file to: " + fp)
	_ = ioutil.WriteFile(fp, cfg, 0644)
	lgd := logger.Logger("[LOG] configuration file written: dbname::" + c.DatabaseName + "::hostname::" + c.Hostname)
	if lgd != true {
		fmt.Println("failed to log")
	}
}