#include <string.h>
#include <stdlib.h>
#include <stdio.h>

#include "include/http.h"

// what we want to do here is start parsing the http message

// GET / HTTP/1.1
// Host: localhost:8080
// User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:134.0) Gecko/20100101 Firefox/134.0
// Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
// Accept-Language: en-US,en;q=0.5
// Accept-Encoding: gzip, deflate, br, zstd
// Connection: keep-alive
// Upgrade-Insecure-Requests: 1
// Sec-Fetch-Dest: document
// Sec-Fetch-Mode: navigate
// Sec-Fetch-Site: none
// Sec-Fetch-User: ?1
// Priority: u=0, i

http_method_t str_to_http_method(char* input)
{
	if (strncmp(input, "GET", 3) == 0) {
		return GET;	
	} else if (strncmp(input, "HEAD", 4) == 0) {
		return HEAD;
	}

	return UNKNOWN;
}

const char* http_method_to_str(http_method_t input)
{
	switch (input) {
		case GET:
			return "GET";
		case HEAD:
			return "HEAD";
		case UNKNOWN:
		default:
			return "UNKNOWN";
	}
}

void parse_request_line(char** line, http_request* request)
{
	char *tok, *ver, *num;


	tok = strtok(*line, " "); // this is the method
	if (tok == NULL) {
		perror("strtok");
		exit(EXIT_FAILURE);
	}
	request->method = str_to_http_method(tok);

	tok = strtok(NULL, " "); // this is the request URI
	if (tok == NULL) {
		perror("strtok");
		exit(EXIT_FAILURE);
	}
	request->request_uri = (char*) malloc(strlen(tok) + 1);
	strncpy(request->request_uri, tok, strlen(tok) + 1);

	tok = strtok(NULL, " "); // this is the version
	if (tok == NULL) {
		perror("strtok");
		exit(EXIT_FAILURE);
	}

	ver = strtok(tok, "/");
	if (tok == NULL) {
		perror("strtok");
		exit(EXIT_FAILURE);
	}
	ver = strtok(NULL, "/");
	if (tok == NULL) {
		perror("strtok");
		exit(EXIT_FAILURE);
	}


	num = strtok(ver, ".");
	if (tok == NULL) {
		perror("strtok");
		exit(EXIT_FAILURE);
	}
	request->version.major = atoi(num);

	num = strtok(NULL, ".");
	if (tok == NULL) {
		perror("strtok");
		exit(EXIT_FAILURE);
	}
	request->version.minor = atoi(num);
}

void parse_http_request(char** buffer, http_request* request)
{
	// going to be using strtok here to split up the request

	// first lets split each line
	char* line; 

	// parse the first line
	line = strtok(*buffer, "\n");
	if (line == NULL) {
		perror("strtok");
		exit(EXIT_FAILURE);
	}

	parse_request_line(&line, request);

	/**
	 * TODO: start accepting the headers
	 *
	 * for now im going to ignore them since they're not suuuper important for simple
	 * operation
	 *
	 * whats important is that we have the 2 things we need to get started, the method and the URI
	 */


	/**
	// parse the remaining lines
	while (line != NULL) {
		// get the rest of them
		line = strtok(NULL, "\n");
		
	}
	*/
}