// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.

package transport

import (
_	"errors"
	"io"
_	"os"
	"net/url"
	"net/http"
	"context"
	"path/filepath"
	"fmt"
)

type HTTPReader struct {
	*HTTP
	get *HTTPConnection
}

func NewHTTPReader(u *url.URL, ctx context.Context) (h *HTTPReader, err error) {
	h = &HTTPReader {
		HTTP: &HTTP {
			ctx: ctx,
			uri: u,
			path: filepath.Join(u.Hostname(), u.RequestURI()),
			Client: http.DefaultClient,
		},
		get: NewHTTPConnection(http.DefaultClient),
	}

	h.extension()
	h.DetectGzip()
	err = h.get.NewGetRequest(h.ctx, h.uri.String())
	return
}

func (h *HTTPReader) Signature() (documentSignature string) {
	if h.get.Response() != nil {
		documentSignature = h.get.Response().Header.Get("Signature")
		if documentSignature == "" {
			signatureResp, signatureErr := h.Client.Get(fmt.Sprintf("%s.sig", h.uri.String()))
			if signatureErr == nil {
				defer signatureResp.Body.Close()
				readSignatureBody, readSignatureErr := io.ReadAll(signatureResp.Body)
				if readSignatureErr == nil {
					documentSignature = string(readSignatureBody)
				}
			}
		}
	}
	return documentSignature
}

func (h *HTTPReader) ContentType() (contenttype string) {
	contenttype = h.get.Response().Header.Get("Content-Type")
	switch contenttype {
	case "application/octet-stream":
		return h.exttype
	default:
	}
	return
}

func (h *HTTPReader) Reader() io.ReadCloser {
	return h.get
}

func (h *HTTPReader) GetRequest() *http.Request {
	return h.get.Request()
}

func (h *HTTPReader) GetResponse() *http.Response {
	return h.get.Response()
}