128 lines
2.7 KiB
Go
128 lines
2.7 KiB
Go
package config
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import (
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"errors"
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"fmt"
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"os"
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"strings"
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"gopkg.in/yaml.v3"
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)
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const (
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envAPIKey = "GOAICHAT_API_KEY"
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envAPIURL = "GOAICHAT_API_URL"
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)
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// Config captures runtime configuration for the Goaichat application.
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type Config struct {
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API APIConfig `yaml:"api"`
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Model ModelConfig `yaml:"model"`
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Logging LoggingConfig `yaml:"logging"`
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UI UIConfig `yaml:"ui"`
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}
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// APIConfig holds settings for connecting to the OpenAI-compatible API.
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type APIConfig struct {
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URL string `yaml:"url"`
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Key string `yaml:"key"`
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}
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// ModelConfig controls default model behaviour.
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type ModelConfig struct {
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Name string `yaml:"name"`
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Temperature float64 `yaml:"temperature"`
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Stream bool `yaml:"stream"`
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}
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// LoggingConfig encapsulates logging preferences.
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type LoggingConfig struct {
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Level string `yaml:"level"`
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}
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// UIConfig defines terminal rendering preferences.
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type UIConfig struct {
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ShowTimestamps bool `yaml:"show_timestamps"`
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}
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// Load reads configuration from the provided path, falling back to defaults and
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// environment overrides.
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func Load(path string) (*Config, error) {
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cfg := defaultConfig()
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if path != "" {
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if err := loadFile(path, &cfg); err != nil {
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return nil, err
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}
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} else {
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if err := loadFile("config.yaml", &cfg); err != nil && !errors.Is(err, os.ErrNotExist) {
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return nil, err
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}
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}
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applyEnvOverrides(&cfg)
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if err := cfg.validate(); err != nil {
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return nil, err
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}
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return &cfg, nil
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}
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func loadFile(path string, cfg *Config) error {
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data, err := os.ReadFile(path)
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if err != nil {
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if errors.Is(err, os.ErrNotExist) {
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return err
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}
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return fmt.Errorf("read config: %w", err)
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}
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if err := yaml.Unmarshal(data, cfg); err != nil {
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return fmt.Errorf("parse config: %w", err)
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}
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return nil
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}
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func applyEnvOverrides(cfg *Config) {
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if url := strings.TrimSpace(os.Getenv(envAPIURL)); url != "" {
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cfg.API.URL = url
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}
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if key := strings.TrimSpace(os.Getenv(envAPIKey)); key != "" {
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cfg.API.Key = key
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}
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}
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func (c *Config) validate() error {
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if strings.TrimSpace(c.API.URL) == "" {
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return errors.New("api.url must be set")
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}
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if strings.TrimSpace(c.API.Key) == "" {
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return errors.New("api.key must be set or GOAICHAT_API_KEY provided")
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}
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if c.Model.Temperature < 0 || c.Model.Temperature > 2 {
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return fmt.Errorf("model.temperature must be between 0 and 2, got %f", c.Model.Temperature)
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}
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return nil
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}
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func defaultConfig() Config {
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return Config{
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API: APIConfig{
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URL: "https://api.openai.com/v1",
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},
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Model: ModelConfig{
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Name: "gpt-4o-mini",
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Temperature: 0.7,
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Stream: true,
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},
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Logging: LoggingConfig{
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Level: "info",
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},
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UI: UIConfig{
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ShowTimestamps: true,
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},
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}
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}
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