package render

import (
	"encoding/json"

	"github.com/peterqiu0516/sub-store/internal/model"
)

// RenderJson renders proxies as a raw JSON object: {"proxies": [...]}.
func RenderJson(proxies []model.ProxyNode) string {
	// Convert each ProxyNode (map[string]any) to a clean map with nil values removed
	cleaned := make([]any, 0, len(proxies))
	for _, p := range proxies {
		cleaned = append(cleaned, stripNil(p))
	}
	doc := map[string]any{"proxies": cleaned}
	data, _ := json.MarshalIndent(doc, "", "  ")
	return string(data)
}

// stripNil removes nil values from a map recursively (shallow).
func stripNil(m map[string]any) map[string]any {
	result := make(map[string]any, len(m))
	for k, v := range m {
		if v == nil {
			continue
		}
		result[k] = v
	}
	return result
}