package main

import (
	"errors"
	"ersteller-lib/starter/env"
	"fmt"
	"os"
	"path/filepath"
	"strings"
)

// findRepoRoot walks up from the current working directory until it finds a go.mod file.
// It returns the directory containing go.mod, or an error if not found.
func findRepoRoot() (string, error) {
	wd, err := os.Getwd()
	if err != nil {
		return "", err
	}
	curr := wd
	for {
		if _, err := os.Stat(filepath.Join(curr, "go.mod")); err == nil {
			return curr, nil
		}
		parent := filepath.Dir(curr)
		if parent == curr {
			break
		}
		curr = parent
	}
	return "", errors.New("could not locate repository root (go.mod not found in any parent directory)")
}

func main() {
	root, err := findRepoRoot()
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(1)
	}

	envPath := filepath.Join(root, ".env")
	if _, err := os.Stat(envPath); err == nil {
		fmt.Println(".env already exists at:", envPath)
		fmt.Println("No changes made. Delete or move the existing .env to regenerate.")
		return
	}

	// Build .env content dynamically from keys exposed by env package
	// so we don't duplicate the list here.
	keys := env.EnvKeys()

	builder := &strings.Builder{}
	fmt.Fprintln(builder, "# Environment configuration for Salezenify")
	fmt.Fprintln(builder, "# Generated by cli/generate_env.go")
	fmt.Fprintln(builder, "# Fill in the appropriate values for your environment.")
	fmt.Fprintln(builder)

	// Optional defaults can be set here; leave blank for most keys to avoid assumptions.
	defaults := map[string]string{
		"REPOSITORY_TYPE": "postgres",
	}

	for _, k := range keys {
		v := defaults[k]
		if v == "" {
			fmt.Fprintf(builder, "%s=\n", k)
		} else {
			fmt.Fprintf(builder, "%s=%s\n", k, v)
		}
	}

	content := builder.String()

	if err := os.WriteFile(envPath, []byte(content), 0600); err != nil {
		fmt.Println("Failed to write .env:", err)
		os.Exit(1)
	}

	fmt.Println(".env file created at:", envPath)
	fmt.Println("Review and update the values as needed.")
}