/*          __                               _
*    ____  / /_  ____ ___  __  ___________ _(_)
*   / __ \/ __ \/ __ `__ \/ / / / ___/ __ `/ /
*  / /_/ / / / / / / / / / /_/ / /__/ /_/ / /
*  \____/_/ /_/_/ /_/ /_/\__, /\___/\__, /_/
*                       /____/     /____/
*
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2021, Max Christian Pohle <max@coderonline.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* {{{ DISCLAIMER
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
* }}}
*/

#include "main.h"
#include <cups/cups.h>

static const char * line1 = NULL, * line2 = NULL;

int print_on_correct_printer(void * user_data, unsigned flags, cups_dest_t * dest) {
	if(!strstr(dest->name, user_data)) {
		// DEBUG("> Wrong printer name: '%s'; try next printer...\n", dest->name);
		return 1;
	}

	DEBUG("> Correct printer found: %s\n", dest->name);

	if(!dest
	|| !line1
	|| !line2) {
		DEBUG("> Nothing to print or printer not found: %p %p %p\n", dest, line1, line2);
		return 1;
	}

	int job_id              = 0;
	int num_options         = 0;

	cups_option_t * options = NULL;
	num_options = cupsAddOption(CUPS_MEDIA_TYPE, CUPS_MEDIA_TYPE_LABELS, num_options, &options);
	num_options = cupsAddOption(CUPS_MEDIA, CUPS_MEDIA_SOURCE_MANUAL, num_options, &options);
	num_options = cupsAddOption(CUPS_PRINT_QUALITY, CUPS_PRINT_QUALITY_HIGH, num_options, &options);
	num_options = cupsAddOption(CUPS_MEDIA, "62x15mm", num_options, &options);

	cups_dinfo_t * info = cupsCopyDestInfo(CUPS_HTTP_DEFAULT, dest);

	if (cupsCreateDestJob(CUPS_HTTP_DEFAULT, dest, info, &job_id, "My Document", num_options, options) == IPP_STATUS_OK)
		DEBUG("> Created job: %d\n", job_id);
	else
		DEBUG("> Unable to create job: %s\n", cupsLastErrorString());

	if (cupsStartDestDocument(CUPS_HTTP_DEFAULT, dest, info, job_id, "filename.pdf", CUPS_FORMAT_TEXT, num_options, options, 1) == HTTP_STATUS_CONTINUE)
	{
		DEBUG("> printing label:\n>\t%s\n>\t%s\n", line1, line2);

		cupsWriteRequestData(CUPS_HTTP_DEFAULT, line1, strlen(line1));
		cupsWriteRequestData(CUPS_HTTP_DEFAULT, "\n", 1);
		cupsWriteRequestData(CUPS_HTTP_DEFAULT, line2, strlen(line2));

		if (cupsFinishDestDocument(CUPS_HTTP_DEFAULT, dest, info) == IPP_STATUS_OK)
			DEBUG("> Document send succeeded.");
		else
			DEBUG("> Document send failed: %s\n", cupsLastErrorString());
	}
	return 0;
}

void send_answer_file(Http_Header * http_header, FILE * f) {
	fputs("HTTP/1.0 200 OK\n", f);
	fputs("content-type: text/html\n\n", f);
	fflush(f);

	#define BUFFER_SIZE 1024
	char buffer[BUFFER_SIZE];
	FILE * file = fopen(&http_header->url[1], "r");
	if(file) {
		size_t read_size = 0;
		for(;;) {
			read_size = fread(buffer, 1, BUFFER_SIZE, file);
			fwrite(buffer, 1, read_size, f);
			if(feof(file))
				break;
		}
	} else {
			fprintf(f, "could not open file \"%s\"\n", &http_header->url[1]);
	}

	return;
}

void send_answer(Http_Header * http_header, FILE * f) {

	char * printer_name = "Brother_QL-720NW"; // TODO: make configurable

	cupsEnumDests(CUPS_DEST_FLAGS_NONE,
			0,
			NULL,
			CUPS_PRINTER_VARIABLE,
			CUPS_PRINTER_LOCAL,
			print_on_correct_printer,
			printer_name
			);

	line1 = NULL;
	line2 = NULL;

	send_answer_file(http_header, f);
}

void next_part(Http_Header * http_header, const char * content, size_t content_size) {
	if(!http_header->content_disposition) {
		DEBUG("> No Content-Disposition header found\n");
		return;
	}

	if(strstr(http_header->content_disposition, "name=\"line1\"")) {
		line1 = content;
	} else if(strstr(http_header->content_disposition, "name=\"line2\"")) {
		line2 = content;
	}

	printf("> content_disposition: %s\n", http_header->content_disposition);
	printf("> size: %ld\n", content_size);
	fwrite(content, content_size, 1, stdout);
	puts("");
	fflush(stdout);
	return;
}

// modeline for vim: shiftwidth=2 tabstop=2 number foldmethod=marker