package cp437tree

import (
	"fmt"
	"io"
)

const (
	VerticalRight = "├"
	DownLeft = "┐"
	UpRight = "└"
	DownRight = "┌"
	Horizontal ="─"
	Vertical = "│"
)

/*
┌┐ // HeaderTop
├┐ // HeaderMid
│├ // ItemMid
│└ // ItemBottom
└┐ // HeaderBottom
 └── //ItemEndBottom
*/

type Node struct {
	Text string
	Children *[]Node
}


func (o *Request) ToTreeGroup(w io.Writer, position rune) {
	middle := "├──┐" // default middle branch
	midRow := "│  ├── "
	botRow := "│  └── "
	topBranch := "┌──┐"
	endBranch := "└──┐"
	veryBottomRow := "   └── "

	rowChars := ""
	if position == 't' {
		branch = topBranch
	}
	if position == 'b' {
		branch = endBranch
	}

	// platform name header
	rowChars = midRow
	// preparing the children variable so this whole thing can be extracted later.
	children := o.Versions
	childCount := len(children) - 1
	for idx, v := range children {
		if idx == childCount {
			rowChars = botRow
			if position == 'b' {
				rowChars = veryBottomRow
			}
		}
		_, _ = fmt.Fprintf(w, "\n%s%s", rowChars, v)
	}

	// new line to end the row
	_, _ = fmt.Fprintf(w, "\n")
}

func idToPosition(id, count int) rune {
	// Returns 't' for top, 'b' for bottom, and 'm', for middle by comparing the idx to the count of rows.
	// Does not account for if count = 1
	if id == 0 {
		return 't'
	}
	if id == count-1 {
		return 'b'
	}
	return 'm'
}