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package theme
import (
"fmt"
"slices"
"strings"
"sync"
"github.com/alecthomas/chroma/v2/styles"
"github.com/opencode-ai/opencode/internal/config"
"github.com/opencode-ai/opencode/internal/logging"
)
// Manager handles theme registration, selection, and retrieval.
// It maintains a registry of available themes and tracks the currently active theme.
type Manager struct {
themes map[string]Theme
currentName string
mu sync.RWMutex
}
// Global instance of the theme manager
var globalManager = &Manager{
themes: make(map[string]Theme),
currentName: "",
}
// RegisterTheme adds a new theme to the registry.
// If this is the first theme registered, it becomes the default.
func RegisterTheme(name string, theme Theme) {
globalManager.mu.Lock()
defer globalManager.mu.Unlock()
globalManager.themes[name] = theme
// If this is the first theme, make it the default
if globalManager.currentName == "" {
globalManager.currentName = name
}
}
// SetTheme changes the active theme to the one with the specified name.
// Returns an error if the theme doesn't exist.
func SetTheme(name string) error {
globalManager.mu.Lock()
defer globalManager.mu.Unlock()
delete(styles.Registry, "charm")
if _, exists := globalManager.themes[name]; !exists {
return fmt.Errorf("theme '%s' not found", name)
}
globalManager.currentName = name
// Update the config file using viper
if err := updateConfigTheme(name); err != nil {
// Log the error but don't fail the theme change
logging.Warn("Warning: Failed to update config file with new theme", "err", err)
}
return nil
}
// CurrentTheme returns the currently active theme.
// If no theme is set, it returns nil.
func CurrentTheme() Theme {
globalManager.mu.RLock()
defer globalManager.mu.RUnlock()
if globalManager.currentName == "" {
return nil
}
return globalManager.themes[globalManager.currentName]
}
// CurrentThemeName returns the name of the currently active theme.
func CurrentThemeName() string {
globalManager.mu.RLock()
defer globalManager.mu.RUnlock()
return globalManager.currentName
}
// AvailableThemes returns a list of all registered theme names.
func AvailableThemes() []string {
globalManager.mu.RLock()
defer globalManager.mu.RUnlock()
names := make([]string, 0, len(globalManager.themes))
for name := range globalManager.themes {
names = append(names, name)
}
slices.SortFunc(names, func(a, b string) int {
if a == "opencode" {
return -1
} else if b == "opencode" {
return 1
}
return strings.Compare(a, b)
})
return names
}
// GetTheme returns a specific theme by name.
// Returns nil if the theme doesn't exist.
func GetTheme(name string) Theme {
globalManager.mu.RLock()
defer globalManager.mu.RUnlock()
return globalManager.themes[name]
}
// updateConfigTheme updates the theme setting in the configuration file
func updateConfigTheme(themeName string) error {
// Use the config package to update the theme
return config.UpdateTheme(themeName)
}
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