package env

import (
	"errors"
	"fmt"
	"strings"
)

func formatENV() (string, error) {
	if envPB == nil {
		return "", errors.New("envPB not initialized")
	}

	var out string
	uniques := make(map[string]*Key) // check to make sure there are no duplicate entries

	// todo: remove this duplicate entry check once duplicates aren't a problem anymore
	for c := range envPB.IterAll() {
		key := strings.ToLower(c.Var)
		if len(strings.Fields(key)) != 1 {
			// fmt.Println("dropping invalid key = ", c.Var, "value =", c.Value)
			continue
		}
		found := findByLower(key)
		if found == nil {
			// fmt.Println("findByKey() got nil for key:", key)
		}
		// todo: warn about duplicates?
		uniques[key] = found
	}

	for key, c := range uniques {
		_ = key
		if c == nil {
			// fmt.Println("key has nil c", key)
			continue
		}
		if c.Global != "" {
			// don't write out anything defined globally
			continue
		}
		line := fmt.Sprintf("%s=%s", c.Var, c.Value)
		out += line + "\n"
	}
	return out, nil
}

func findByLower(lookingFor string) *Key {
	for c := range envPB.IterAll() {
		if strings.ToLower(c.Var) == strings.ToLower(lookingFor) {
			return c
		}
	}
	return nil
}