package game

import (
	"fmt"
	"strings"
	"unicode/utf8"

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

func (g *Game) executeSymbol(sess *net.Session, args []string, rawInput string) {
	p := sess.Player
	if len(args) == 0 {
		data, ok := p.MapSymbols[p.RoomID]
		if !ok {
			sess.WriteLine("No custom symbol set for this room.")
			return
		}
		msg := fmt.Sprintf("Custom symbol: %s", data.Char)
		if data.Color != "" {
			spec := color.Parse(data.Color)
			colored := color.Render(g.colorMode(sess), spec, data.Char)
			msg = fmt.Sprintf("Custom symbol: %s (%s)", colored, data.Color)
		}
		sess.WriteLine(msg)
		return
	}

	// extract symbol char from rawInput to preserve case, since
	// handleGameCommand lowercases args before dispatch (same pattern as say).
	char := args[0]
	if idx := strings.Index(strings.ToLower(rawInput), "symbol"); idx >= 0 {
		rest := strings.TrimSpace(rawInput[idx+6:])
		if space := strings.Index(rest, " "); space >= 0 {
			char = rest[:space]
		} else {
			char = rest
		}
	}

	cleared := false
	if strings.EqualFold(char, "reset") || strings.EqualFold(char, "remove") {
		delete(p.MapSymbols, p.RoomID)
		if err := g.AccountStore.SaveCharacter(p); err != nil {
			sess.WriteLine("Error saving: " + err.Error())
			return
		}
		sess.WriteLine("Custom symbol reset for this room.")
		cleared = true
	}

	if !cleared {
		r, size := utf8.DecodeRuneInString(char)
		if size == 0 || size != len(char) || r == utf8.RuneError {
			// color-only mode — args are a color spec, keep existing char
			colorSpec := strings.Join(args, " ")
			spec := color.Parse(colorSpec)
			if spec.Empty() {
				sess.WriteLine("Invalid color spec. Use a hex color code like FF and/or bold/dim/underline.")
				return
			}
			existing, ok := p.MapSymbols[p.RoomID]
			if !ok {
				existing = player.MapSymbolData{Char: "■"}
			}
			existing.Color = colorSpec
			p.MapSymbols[p.RoomID] = existing
			if err := g.AccountStore.SaveCharacter(p); err != nil {
				sess.WriteLine("Error saving: " + err.Error())
				return
			}
			colored := color.Render(g.colorMode(sess), spec, existing.Char)
			sess.WriteLine(fmt.Sprintf("Map symbol color set to: %s (%s)", colored, colorSpec))
			return
		}

		colorSpec := ""
		if len(args) > 1 {
			colorSpec = strings.Join(args[1:], " ")
			if colorSpec != "" {
				spec := color.Parse(colorSpec)
				if spec.Empty() {
					sess.WriteLine("Invalid color spec. Use a hex color code like FF and/or bold/dim/underline.")
					return
				}
			}
		}

		p.MapSymbols[p.RoomID] = player.MapSymbolData{
			Char:  char,
			Color: colorSpec,
		}

		if err := g.AccountStore.SaveCharacter(p); err != nil {
			sess.WriteLine("Error saving: " + err.Error())
			return
		}

		msg := fmt.Sprintf("Map symbol set to: %s", char)
		if colorSpec != "" {
			spec := color.Parse(colorSpec)
			colored := color.Render(g.colorMode(sess), spec, char)
			msg = fmt.Sprintf("Map symbol set to: %s", colored)
		}
		sess.WriteLine(msg)
	}
}