package template

import (
	"fmt"
	"os"
	"path/filepath"
	"strings"
)

func findProjectRoot() string {
	wd, _ := os.Getwd()
	dir := wd
	for i := 0; i < 10; i++ {
		if _, err := os.Stat(filepath.Join(dir, "templates", "docs")); err == nil {
			return dir
		}
		parent := filepath.Dir(dir)
		if parent == dir {
			break
		}
		dir = parent
	}
	return wd
}

func GetDocTemplate(name string) (string, error) {
	name = strings.TrimSuffix(name, ".md")
	root := findProjectRoot()
	path := filepath.Join(root, "templates", "docs", name+".md")
	b, err := os.ReadFile(path)
	if err != nil {
		return "", fmt.Errorf("read doc template %s: %w", name, err)
	}
	return string(b), nil
}

func GetAgentInstruction(role string) (string, error) {
	role = strings.TrimSuffix(role, ".md")
	root := findProjectRoot()
	path := filepath.Join(root, "configs", "agents", role+".md")
	b, err := os.ReadFile(path)
	if err != nil {
		return "", fmt.Errorf("read agent instruction %s: %w", role, err)
	}

	inst := string(b)
	writingPath := filepath.Join(root, "configs", "shared", "writing.md")
	if wb, err := os.ReadFile(writingPath); err == nil {
		inst += "\n\n" + string(wb)
	}
	return inst, nil
}