//
// Copyright (c) 2016-2022 The Aurora Authors. All rights reserved.
// This program is free software. It comes without any warranty,
// to the extent permitted by applicable law. You can redistribute
// it and/or modify it under the terms of the Unlicense. See LICENSE
// file for more details or see below.
//

//
// This is free and unencumbered software released into the public domain.
//
// Anyone is free to copy, modify, publish, use, compile, sell, or
// distribute this software, either in source code form or as a compiled
// binary, for any purpose, commercial or non-commercial, and by any
// means.
//
// In jurisdictions that recognize copyright laws, the author or authors
// of this software dedicate any and all copyright interest in the
// software to the public domain. We make this dedication for the benefit
// of the public at large and to the detriment of our heirs and
// successors. We intend this dedication to be an overt act of
// relinquishment in perpetuity of all present and future rights to this
// software under copyright law.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
// For more information, please refer to <http://unlicense.org/>
//

// Package aurora implements ANSI-colors
package aurora

type Aurora struct {
	conf Config
	cc   colorConfig
}

// New returns new colorizer by given Options.
func New(opts ...Option) (a *Aurora) {
	a = new(Aurora)
	a.conf = NewConfig()        // set defaults
	a.conf.Apply(opts...)       // apply options
	a.cc = a.conf.colorConfig() // keep the short hand
	return
}

// Config of the colorizer. It returns copy of the configurations.
func (a *Aurora) Config() Config {
	return a.conf
}

// Reset wraps given argument returning Value without formats, colors and links.
func (a *Aurora) Reset(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Reset()
	}
	return Value{
		cc:    a.cc,
		value: arg,
	}
}

// Clear wraps given argument returning Value without formats and colors. But
// preserving links.
func (a *Aurora) Clear(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Clear()
	}
	return Value{
		cc:    a.cc,
		value: arg,
	}
}

// Formats
//
// Bold or increased intensity (1).
func (a *Aurora) Bold(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Bold()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Bold()),
		value: arg,
	}
}

// Faint, decreased intensity (2).
func (a *Aurora) Faint(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Faint()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Faint()),
		value: arg,
	}
}

// DoublyUnderline or Bold off, double-underline per ECMA-48 (21).
func (a *Aurora) DoublyUnderline(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.DoublyUnderline()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).DoublyUnderline()),
		value: arg,
	}
}

// Fraktur, rarely supported (20).
func (a *Aurora) Fraktur(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Fraktur()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Fraktur()),
		value: arg,
	}
}

// Italic, not widely supported, sometimes treated as inverse (3).
func (a *Aurora) Italic(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Italic()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Italic()),
		value: arg,
	}
}

// Underline (4).
func (a *Aurora) Underline(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Underline()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Underline()),
		value: arg,
	}
}

// SlowBlink, blinking less than 150 per minute (5).
func (a *Aurora) SlowBlink(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.SlowBlink()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).SlowBlink()),
		value: arg,
	}
}

// RapidBlink, blinking 150+ per minute, not widely supported (6).
func (a *Aurora) RapidBlink(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.RapidBlink()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).RapidBlink()),
		value: arg,
	}
}

// Blink is alias for the SlowBlink.
func (a *Aurora) Blink(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Blink()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Blink()),
		value: arg,
	}
}

// Reverse video, swap foreground and background colors (7).
func (a *Aurora) Reverse(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Reverse()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Reverse()),
		value: arg,
	}
}

// Inverse is alias for the Reverse
func (a *Aurora) Inverse(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Inverse()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Inverse()),
		value: arg,
	}
}

// Conceal, hidden, not widely supported (8).
func (a *Aurora) Conceal(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Conceal()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Conceal()),
		value: arg,
	}
}

// Hidden is alias for the Conceal.
func (a *Aurora) Hidden(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Hidden()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Hidden()),
		value: arg,
	}
}

// CrossedOut, characters legible, but marked for deletion (9).
func (a *Aurora) CrossedOut(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.CrossedOut()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).CrossedOut()),
		value: arg,
	}
}

// StrikeThrough is alias for the CrossedOut.
func (a *Aurora) StrikeThrough(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.StrikeThrough()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).StrikeThrough()),
		value: arg,
	}
}

// Framed (51).
func (a *Aurora) Framed(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Framed()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Framed()),
		value: arg,
	}
}

// Encircled (52).
func (a *Aurora) Encircled(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Encircled()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Encircled()),
		value: arg,
	}
}

// Overlined (53).
func (a *Aurora) Overlined(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Overlined()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Overlined()),
		value: arg,
	}
}

// Foreground colors
//
// Black foreground color (30).
func (a *Aurora) Black(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Black()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Black()),
		value: arg,
	}
}

// Red foreground color (31).
func (a *Aurora) Red(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Red()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Red()),
		value: arg,
	}
}

// Green foreground color (32).
func (a *Aurora) Green(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Green()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Green()),
		value: arg,
	}
}

// Yellow foreground color (33).
func (a *Aurora) Yellow(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Yellow()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Yellow()),
		value: arg,
	}
}

// Blue foreground color (34).
func (a *Aurora) Blue(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Blue()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Blue()),
		value: arg,
	}
}

// Magenta foreground color (35).
func (a *Aurora) Magenta(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Magenta()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Magenta()),
		value: arg,
	}
}

// Cyan foreground color (36).
func (a *Aurora) Cyan(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Cyan()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Cyan()),
		value: arg,
	}
}

// White foreground color (37).
func (a *Aurora) White(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.White()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).White()),
		value: arg,
	}
}

// Bright foreground colors.
//
// BrightBlack foreground color (90).
func (a *Aurora) BrightBlack(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BrightBlack()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BrightBlack()),
		value: arg,
	}
}

// BrightRed foreground color (91).
func (a *Aurora) BrightRed(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BrightRed()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BrightRed()),
		value: arg,
	}
}

// BrightGreen foreground color (92).
func (a *Aurora) BrightGreen(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BrightGreen()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BrightGreen()),
		value: arg,
	}
}

// BrightYellow foreground color (93).
func (a *Aurora) BrightYellow(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BrightYellow()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BrightYellow()),
		value: arg,
	}
}

// BrightBlue foreground color (94).
func (a *Aurora) BrightBlue(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BrightBlue()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BrightBlue()),
		value: arg,
	}
}

// BrightMagenta foreground color (95).
func (a *Aurora) BrightMagenta(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BrightMagenta()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BrightMagenta()),
		value: arg,
	}
}

// BrightCyan foreground color (96).
func (a *Aurora) BrightCyan(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BrightCyan()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BrightCyan()),
		value: arg,
	}
}

// BrightWhite foreground color (97).
func (a *Aurora) BrightWhite(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BrightWhite()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BrightWhite()),
		value: arg,
	}
}

// Other colors.
//
// Index of pre-defined 8-bit foreground color from 0 to 255 (38;5;n).
//
//	  0-  7:  standard colors (as in ESC [ 30–37 m)
//	  8- 15:  high intensity colors (as in ESC [ 90–97 m)
//	 16-231:  6 × 6 × 6 cube (216 colors): 16 + 36 × r + 6 × g + b (0 ≤ r, g, b ≤ 5)
//	232-255:  grayscale from black to white in 24 steps
func (a *Aurora) Index(n ColorIndex, arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Index(n)
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Index(n)),
		value: arg,
	}
}

// Gray from 0 to 23.
func (a *Aurora) Gray(n GrayIndex, arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.Gray(n)
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).Gray(n)),
		value: arg,
	}
}

// Background colors.
//
// BgBlack background color (40).
func (a *Aurora) BgBlack(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgBlack()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgBlack()),
		value: arg,
	}
}

// BgRed background color (41).
func (a *Aurora) BgRed(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgRed()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgRed()),
		value: arg,
	}
}

// BgGreen background color (42).
func (a *Aurora) BgGreen(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgGreen()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgGreen()),
		value: arg,
	}
}

// BgYellow background color (43).
func (a *Aurora) BgYellow(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgYellow()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgYellow()),
		value: arg,
	}
}

// BgBlue background color (44).
func (a *Aurora) BgBlue(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgBlue()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgBlue()),
		value: arg,
	}
}

// BgMagenta background color (45).
func (a *Aurora) BgMagenta(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgMagenta()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgMagenta()),
		value: arg,
	}
}

// BgCyan background color (46).
func (a *Aurora) BgCyan(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgCyan()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgCyan()),
		value: arg,
	}
}

// BgWhite background color (47).
func (a *Aurora) BgWhite(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgWhite()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgWhite()),
		value: arg,
	}
}

// Bright background colors.
//
// BgBrightBlack background color (100).
func (a *Aurora) BgBrightBlack(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgBrightBlack()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgBrightBlack()),
		value: arg,
	}
}

// BgBrightRed background color (101).
func (a *Aurora) BgBrightRed(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgBrightRed()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgBrightRed()),
		value: arg,
	}
}

// BgBrightGreen background color (102).
func (a *Aurora) BgBrightGreen(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgBrightGreen()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgBrightGreen()),
		value: arg,
	}
}

// BgBrightYellow background color (103).
func (a *Aurora) BgBrightYellow(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgBrightYellow()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgBrightYellow()),
		value: arg,
	}
}

// BgBrightBlue background color (104).
func (a *Aurora) BgBrightBlue(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgBrightBlue()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgBrightBlue()),
		value: arg,
	}
}

// BgBrightMagenta background color (105).
func (a *Aurora) BgBrightMagenta(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgBrightMagenta()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgBrightMagenta()),
		value: arg,
	}
}

// BgBrightCyan background color (106).
func (a *Aurora) BgBrightCyan(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgBrightCyan()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgBrightCyan()),
		value: arg,
	}
}

// BgBrightWhite background color (107).
func (a *Aurora) BgBrightWhite(arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgBrightWhite()
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgBrightWhite()),
		value: arg,
	}
}

// Other background colors.
//
// BgIndex of 8-bit pre-defined background color from 0 to 255 (48;5;n).
//
//	  0-  7:  standard colors (as in ESC [ 40–47 m)
//	  8- 15:  high intensity colors (as in ESC [100–107 m)
//	 16-231:  6 × 6 × 6 cube (216 colors): 16 + 36 × r + 6 × g + b (0 ≤ r, g, b ≤ 5)
//	232-255:  grayscale from black to white in 24 steps
func (a *Aurora) BgIndex(n ColorIndex, arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgIndex(n)
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgIndex(n)),
		value: arg,
	}
}

// BgGray from 0 to 23.
func (a *Aurora) BgGray(n GrayIndex, arg interface{}) Value {
	if val, ok := arg.(Value); ok {
		return val.BgGray(n)
	}
	return Value{
		cc:    a.cc | colorConfig(Color(0).BgGray(n)),
		value: arg,
	}
}

// Special color functions.
//
// Colorize removes existing colors and
// formats of the argument and applies given.
func (a *Aurora) Colorize(arg interface{}, color Color) Value {
	if val, ok := arg.(Value); ok {
		return val.Colorize(color)
	}
	return Value{
		cc:    a.cc | colorConfig(color),
		value: arg,
	}
}

// Hyperlinks feature
//
// Hyperlink with given target and parameters. If hyperlinks feature is
// disabled, then the 'arg' argument dropped and the 'target' used instead
// inheriting all colors and format from the 'arg' (if it's a Colored).
//
// See https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
// for details about the hyperlinks feature.
//
// The Hyperlink doesn't escape the target and the params. They should be
// checked and escaped before.
//
// See also HyperlinkID function.
//
// For a simple example
//
//	au.Hyperlink("Example", "http://example.com")
//
// and an example with ID
//
//	au.Hyperlink("Example", "http://example.com", aurora.HyperlinkID("10"))
func (a *Aurora) Hyperlink(arg interface{}, target string,
	params ...HyperlinkParam) Value {

	if val, ok := arg.(Value); ok {
		return val.Hyperlink(target, params...)
	}
	return Value{
		cc:    a.cc,
		value: arg,
	}.Hyperlink(target, params...)
}

// HyperlinkTarget of the argument if it's a Value.
func (a *Aurora) HyperlinkTarget(arg interface{}) (target string) {
	if val, ok := arg.(Value); ok {
		return val.HyperlinkTarget()
	}
	return // no target
}

// HyperlinkParams of the argument if it's a Value.
func (a *Aurora) HyperlinkParams(arg interface{}) (params []HyperlinkParam) {
	if val, ok := arg.(Value); ok {
		return val.HyperlinkParams()
	}
	return // no target
}

func (a *Aurora) transform(arg interface{}) (val Value, ok bool) {
	var ai Value
	ai, ok = arg.(Value)
	if !ok {
		return // Value{}, false
	}
	// if ai.cc.resetColor() == a.cc.resetColor() {
	// 	return // don't replace, same configurations
	// }
	val = Value{cc: a.cc | colorConfig(ai.cc.color()), value: ai.value}
	if a.cc.hyperlinksEnbaled() {
		val.hyperlink = ai.hyperlink
	}
	return val, true // transformed value, true
}

// Sprintf allows to use Value as format. For example
//
//	var v = Sprintf(Red("total: +3.5f points"), Blue(3.14))
//
// In this case "total:" and "points" will be red, but
// 3.14 will be blue. But, in another example
//
//	var v = Sprintf(Red("total: +3.5f points"), 3.14)
//
// full string will be red. And no way to clear 3.14 to default format and
// color.
//
// It applies own configurations to all given Values.
func (a *Aurora) Sprintf(format interface{}, args ...interface{}) string {
	// // clear colors & links as configured by the a
	if f, ok := a.transform(format); ok {
		format = f
	}
	for i := range args {
		if ax, ok := a.transform(args[i]); ok {
			args[i] = ax
		}
	}
	return sprintf(format, args...)
}