package runtimeconfig

import (
	"fmt"
	"strings"

	"inbox/internal/domain/role"
)

// RenderInstructions flattens the resolved system prompt and bound skills into
// the markdown instructions that should be given to the runtime.
func RenderInstructions(resolved ResolvedRole, fallbackSystemPrompt string) string {
	var builder strings.Builder

	systemPrompt := strings.TrimSpace(fallbackSystemPrompt)
	if prompt, ok := resolved.Prompts[role.PromptSystem]; ok && strings.TrimSpace(prompt.ContentMarkdown) != "" {
		systemPrompt = strings.TrimSpace(prompt.ContentMarkdown)
	}
	if systemPrompt != "" {
		builder.WriteString(systemPrompt)
	}

	if len(resolved.Skills) > 0 {
		if builder.Len() > 0 {
			builder.WriteString("\n\n")
		}
		builder.WriteString("## Skills\n")
		for _, item := range resolved.Skills {
			name := strings.TrimSpace(item.Skill.Name)
			if name == "" {
				name = strings.TrimSpace(item.Skill.SkillKey)
			}
			if name == "" {
				name = strings.TrimSpace(item.Skill.ID)
			}
			builder.WriteString(fmt.Sprintf("### %s\n%s\n", name, strings.TrimSpace(item.Skill.ContentMarkdown)))
		}
	}

	return strings.TrimSpace(builder.String())
}