package game

import (
	"fmt"
	"strings"

	"thehouseoficarus/internal/color"
	"thehouseoficarus/internal/net"
)

func (g *Game) doColortable(sess *net.Session) {
	mode := g.colorMode(sess)
	if mode == "none" || mode == "" {
		sess.WriteLine("Enable colors first: option color ansi (or xterm256)")
		return
	}

	writeColorBlock(sess, mode, true)
	sess.WriteLine("")
	writeColorBlock(sess, mode, false)
}

func (g *Game) executeColortable(sess *net.Session, args []string, rawInput string) {
	g.doColortable(sess)
}

func writeColorBlock(sess *net.Session, mode string, fg bool) {
	sess.WriteLine("ANSI 16 Colors:")
	writeColorRow(sess, mode, 0, 8, fg)
	writeColorRow(sess, mode, 8, 16, fg)

	sess.WriteLine("Color cube:")
	for blockRow := 0; blockRow < 2; blockRow++ {
		for row := 0; row < 6; row++ {
			var sb strings.Builder
			for block := 0; block < 3; block++ {
				base := 16 + (blockRow*3+block)*36 + row*6
				for col := 0; col < 6; col++ {
					idx := base + col
					if idx > 231 {
						break
					}
					if fg {
						sb.WriteString(color.FgCode(mode, idx))
					} else {
						sb.WriteString(color.ContrastFg(mode, idx))
						sb.WriteString(color.BgCode(mode, idx))
					}
					sb.WriteString(fmt.Sprintf(" %02X", idx))
					sb.WriteString(color.Reset)
				}
				if block < 2 {
					sb.WriteString("  ")
				}
			}
			sess.WriteLine(sb.String())
		}
		if blockRow == 0 {
			sess.WriteLine("")
		}
	}

	sess.WriteLine("Grayscale:")
	writeColorRow(sess, mode, 232, 244, fg)
	writeColorRow(sess, mode, 244, 256, fg)
}

func writeColorRow(sess *net.Session, mode string, start, end int, fg bool) {
	var sb strings.Builder
	for i := start; i < end && i < 256; i++ {
		if fg {
			sb.WriteString(color.FgCode(mode, i))
		} else {
			sb.WriteString(color.ContrastFg(mode, i))
			sb.WriteString(color.BgCode(mode, i))
		}
		sb.WriteString(fmt.Sprintf(" %02X", i))
		sb.WriteString(color.Reset)
	}
	sess.WriteLine(sb.String())
}