package theme

import (
	"sort"

	"github.com/charmbracelet/lipgloss"
)

// 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"
	darkPurple = "#d3869b"

	lightBg0    = "#fbf1c7"
	lightFg1    = "#3c3836"
	lightFg4    = "#7c6f64"
	lightRed    = "#9d0006"
	lightGrn    = "#79740e"
	lightYel    = "#b57614"
	lightBlu    = "#076678"
	lightAqua   = "#427b58"
	lightOrng   = "#af3a03"
	lightPurple = "#8f3f71"
)

// 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,

	// Red already means an alarm, so it is the one gruvbox hue left out here.
	Identity: [6]lipgloss.Color{darkBlu, darkAqua, darkYel, darkGrn, darkOrng, darkPurple},
}

// 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,

	Identity: [6]lipgloss.Color{lightBlu, lightAqua, lightYel, lightGrn, lightOrng, lightPurple},
}

// 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
}