// ------------------------------------------------------------------------
//   Project active2
//   Active Thing (activething.com) git.activething.com/go
//
//   File n  code.go
//   Created by DEV
//   Modified   06/04/2024
//
//   Copyright 2024 activething.com 
// ------------------------------------------------------------------------
// 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 ansi

import (
	"bytes"
	"fmt"
	"io"
	"strings"
)





type (

	Code uint16
)


func (c Code) Atts () string {
	if c == 0 {
		return ""
	}
	var r []string
	m := c & txMask
	if m != 0 {
		dc := styleAttsStart
		for i:=0; i<6; i++ {
			if m & dc != 0 {
				r = append(r,string(g.itx[i].n))
			}
			dc <<= 1
		}
	}
	r = append(r,strings.Join([]string{c.FgColor().Name(),c.BgColor().Name()},":"))
	return strings.Join(r,";")
}



func (c Code) Clear () Code {
	return 0 }

func (c Code) ClearColor () Code {
	return c & txMask }

func (c Code) ClearText  () Code {
	return c & clMask }


func (c Code) FgColor() Color {
	return Color((c & clMask) & bgMask) }

func (c Code) SetFgColor(color Color) Code {
	if !color.IsValid() {
		return c
	}
	return (c & fgMask) | Code(color)& bgMask
}

func (c Code) ResetFgColor() Code {
	return (c & fgMask) | Code(colorDefault)& bgMask }


func (c Code) BgColor() Color {
	return Color(((c & clMask) & fgMask) >> bgShift) }

func (c Code) SetBgColor(color Color) Code {
	if !color.IsValid() {
		return c
	}
	return (c & bgMask) | (Code(color)<< bgShift) & fgMask
}

func (c Code) ResetBgColor() Code {
	return (c & bgMask) | (Code(colorDefault)<< bgShift) & fgMask }



func (c Code) Style () Style {
	return Style(c >> 10) }


func (c Code) SetStyle (sty Style) Code {
	if !sty.IsValid() {
		return c
	}
	v := Code(sty) << stShift
	return ((((c & txMask) >>styleNumOps) &^ v) <<styleNumOps | v) | c & clMask
}

func (c Code) DelStyle (sty Style) Code {
	if !sty.IsValid() {
		return c
	}
	v := Code(sty) << (styleNumOps + stShift)
	return ((((c & txMask) <<styleNumOps) &^ v) >>styleNumOps | v) | c & clMask
}



func (c Code) scapeStyle () []byte {
	m := c & txMask
	if m == 0 {
		return nil
	}
	var r []byte
	dc := styleAttsStart
	for i:=0; i<6; i++ {
		if m & dc != 0 {
			if r != nil {
				r = append(r,';')
			} else {
				r = append(r,'0',';')
			}
			r = append(r, g.itx[i].s...)
		}
		dc <<= 1
	}
	return r
}


func (c Code) scapeColor () []byte {
	m := c & clMask
	if m == 0 {
		return nil
	}
	var r []byte
	f := m & bgMask
	b := (m & fgMask) >> bgShift
	if f != 0 {
		r = append(r, g.ics[f].f...)
	}
	if b != 0 {
		if f > 0 {
			r=append(r,';')
		}
		r = append(r, g.ics[b].b...)
	}
	return r
}


func (c Code) escape () []byte {
	if c == 0 {
		return []byte{'0'}
	}
	st := c.scapeStyle()
	sc := c.scapeColor()
	if len(sc) == 0 {
		return st
	}
	if len(st) == 0 {
		return sc
	}
	return append(st,append([]byte{';'},sc...)...)
}


func (c Code) stringValues() string {
	return string(c.escape())
}


func (c Code) String() string {
	if c == 0 {
		return ""
	}
	r := c.escape()
	return string(append(g.beginEscIni, append(r, g.beginEscEnd...)...))
}

func (_ Code) End () string {
	return g.endEscStr }





func (c Code) Errorf (format string, params ...any) error {
	return fmt.Errorf(c.Sprintf(format,params...)) }

func (c Code) Fprint (writer io.Writer, format string, params ...any) (n int, e error) {
	return fmt.Fprint(writer,c.Sprintf(format,params...)) }

func (c Code) Fprintln (writer io.Writer, format string, params ...any) (n int, e error) {
	return fmt.Fprintln(writer,c.Sprintf(format,params...)) }

func (c Code) Print (input ...any) (n int, e error) {
	return fmt.Print(c.wrap(input ...)) }

func (c Code) Printf (format string, params ...any) {
	fmt.Printf(c.Sprintf(format,params...)) }


func (c Code) Sprint (format string, params ...any) string {
	return fmt.Sprint(c.Sprintf(format,params...))
}

func (c Code) Sprintf (format string, params ...any) string {
	if len(format) == 0 && len(params) == 0 {
		return ""
	}
	s := fmt.Sprintf(format,params...)
	if c == 0 {
		return s
	}
	return c.wrap(s)
}

func (c Code) Sprintln(format string, params ...any) string {
	return fmt.Sprintln(c.Sprintf(format,params...)) }



func (c Code) wrap(str ...any) string {
	b := bytes.Buffer{}
	b.WriteString(c.String())
	for _,s := range str {
		b.WriteString(fmt.Sprint(s))
	}
	b.WriteString(g.endEscStr)
	return b.String()
}