package theme

import "sort"

// The gruvbox palettes, in the author's original names. Dark uses the bright
// variants and light the faded ones, which is what keeps each readable against
// its own background.
const (
	darkBg0  = "#282828"
	darkFg1  = "#ebdbb2"
	darkGray = "#928374"
	darkRed  = "#fb4934"
	darkGrn  = "#b8bb26"
	darkYel  = "#fabd2f"
	darkBlu  = "#83a598"
	darkAqua = "#8ec07c"
	darkOrng = "#fe8019"

	lightBg0  = "#fbf1c7"
	lightFg1  = "#3c3836"
	lightFg4  = "#7c6f64"
	lightRed  = "#9d0006"
	lightGrn  = "#79740e"
	lightYel  = "#b57614"
	lightBlu  = "#076678"
	lightAqua = "#427b58"
	lightOrng = "#af3a03"
)

// GruvboxDark is the default scheme. It assumes a dark terminal background:
// themes colour foregrounds only, so the terminal supplies the canvas.
var GruvboxDark = Theme{
	Name: "gruvbox-dark",

	Primary:   darkBlu,
	OnPrimary: darkBg0,
	Text:      darkFg1,
	Muted:     darkGray,
	Accent:    darkOrng,

	Firing:   darkRed,
	Resolved: darkGrn,
	Error:    darkRed,

	SevCritical: darkRed,
	SevError:    darkOrng,
	SevWarning:  darkYel,
	SevInfo:     darkAqua,
}

// GruvboxLight is the same scheme against a light terminal background.
var GruvboxLight = Theme{
	Name: "gruvbox-light",

	Primary:   lightBlu,
	OnPrimary: lightBg0,
	Text:      lightFg1,
	Muted:     lightFg4,
	Accent:    lightOrng,

	Firing:   lightRed,
	Resolved: lightGrn,
	Error:    lightRed,

	SevCritical: lightRed,
	SevError:    lightOrng,
	SevWarning:  lightYel,
	SevInfo:     lightAqua,
}

// Default is the theme used when the config names none.
var Default = GruvboxDark

var builtins = map[string]Theme{
	GruvboxDark.Name:  GruvboxDark,
	GruvboxLight.Name: GruvboxLight,
}

// BuiltinNames lists the compiled-in themes, sorted, for error messages and
// documentation.
func BuiltinNames() []string {
	names := make([]string, 0, len(builtins))
	for name := range builtins {
		names = append(names, name)
	}
	sort.Strings(names)
	return names
}