package prompts

import (
	"bytes"
	"fmt"
	"strings"
)

func RenderUserSystem(promptID string, data any) (system string, user string, metadata Metadata, err error) {
	cp, ok := promptRegistry[strings.TrimSpace(promptID)]
	if !ok {
		return "", "", Metadata{}, fmt.Errorf("unknown prompt id %q", promptID)
	}

	var systemBuf bytes.Buffer
	if err := cp.systemTmpl.Execute(&systemBuf, data); err != nil {
		return "", "", Metadata{}, fmt.Errorf("render system prompt %q: %w", promptID, err)
	}
	var userBuf bytes.Buffer
	if err := cp.userTmpl.Execute(&userBuf, data); err != nil {
		return "", "", Metadata{}, fmt.Errorf("render user prompt %q: %w", promptID, err)
	}
	return strings.TrimSpace(systemBuf.String()), strings.TrimSpace(userBuf.String()), cp.metadata, nil
}