package handler

import (
	"context"

	"AI-Expert-Sidebar/internal/service"
)

// SettingsHandler exposes AI settings CRUD via Wails bindings.
type SettingsHandler struct{ ctx context.Context }

func NewSettingsHandler() *SettingsHandler                { return &SettingsHandler{} }
func (s *SettingsHandler) SetContext(ctx context.Context) { s.ctx = ctx }

// GetSettings returns the current local AI settings.
func (s *SettingsHandler) GetSettings() *service.SettingsDTO {
	return service.GetSettings()
}

// SaveSettings persists AI config to local settings.db.
// Returns empty string on success, error message on failure.
func (s *SettingsHandler) SaveSettings(dto service.SettingsDTO) string {
	if err := service.SaveSettings(dto); err != nil {
		return err.Error()
	}
	return ""
}

// GetProviders returns built-in AI provider presets for the frontend dropdown.
func (s *SettingsHandler) GetProviders() []ProviderPreset {
	return []ProviderPreset{
		{ID: "deepseek", Label: "DeepSeek", BaseURL: "https://api.deepseek.com/chat/completions", DefaultModel: "deepseek-chat"},
		{ID: "openai", Label: "OpenAI", BaseURL: "https://api.openai.com/v1/chat/completions", DefaultModel: "gpt-4o"},
		{ID: "grok", Label: "Grok (xAI)", BaseURL: "https://api.x.ai/v1/chat/completions", DefaultModel: "grok-3"},
		{ID: "custom", Label: "自定义", BaseURL: "", DefaultModel: ""},
	}
}

// ProviderPreset describes a known AI provider with preset URL and model.
type ProviderPreset struct {
	ID           string `json:"id"`
	Label        string `json:"label"`
	BaseURL      string `json:"base_url"`
	DefaultModel string `json:"default_model"`
}