package router

import (
	"strings"
)

type header interface {
	mustEmbedHeader()
}

type Header map[string][]string

func (Header) mustEmbedHeader() {}

func (h Header) Marshal(data any) error {
	return genericValues(h).Marshal(data, "header")
}

func (h Header) Unmarshal(data any) error {
	return genericValues(h).Unmarshal(data, "header")
}

func (h Header) Get(key string) (value string) {
	v, ok := h[key]
	if !ok {
		return
	}
	return strings.Join(v, ", ")
}

func (h Header) Set(key string, value string) {
	h[key] = []string{value}
}

func (h Header) Add(key string, value string) {
	h[key] = append(h[key], value)
}

func (h Header) Merge(header Header) {
	for key, value := range header {
		if _, exists := h[key]; exists {
			continue
		}
		h[key] = value
	}
}

func (h Header) MergeOverwrite(header Header) {
	for key, value := range header {
		h[key] = value
	}
}