<?php
// Making sure the file is included.
if(basename(__FILE__) == basename($_SERVER["SCRIPT_FILENAME"])) {
	header('HTTP/1.1 403 Forbidden');
	die();
}

// Importing required scripts
include_once 'langs.php';

$CONTENT_DEBUG = true;

// TODO: Add /content as raw input of some sort (No auto tags).

// This helper requires PHP 8 or newer !

// Defining constants and enums.
const CONTENT_NONE = 0;
abstract class ContentType {
	const NONE = CONTENT_NONE;
    const BLOG = 1;
    const PROGRAMMING = 2;
    const ELECTRONICS = 3;
}
abstract class ContentDisplayType {
	const NONE = CONTENT_NONE;
    const SEARCH = 1;
    const ARTICLE = 2;
    const APPLICATION = 3;
}

// Preparing default variables.
$requested_content_type = ContentType::NONE;
$requested_content_display_type = ContentDisplayType::NONE;
$content_has_error = false;
$_content_error_message_key = "error.content.none";
$content_error_message = "";
$was_item_requested = false;

$requested_tags = NULL;
$filtered_content_index_data = NULL;

// Detecting content type requested.
$content_requested_url_part = l10n_url_switch(NULL);

if(str_starts_with($content_requested_url_part, "/blog/")) {
	$requested_content_type = ContentType::BLOG;
} elseif(str_starts_with($content_requested_url_part, "/programming/")) {
	$requested_content_type = ContentType::PROGRAMMING;
} elseif(str_starts_with($content_requested_url_part, "/electronics/")) {
	$requested_content_type = ContentType::ELECTRONICS;
} else {
	// Failed to detect which category of content was requested.
	$content_has_error = true;
	$_content_error_message_key = "error.content.detect.category";
	goto content_end;
}

// Detecting what kind of item was requested, parsing additional parameters and loading required data.
$content_requested_url_part = preg_replace("^\/(blog|programming|electronics)^", "", $content_requested_url_part);
$requested_tags = array();
if($requested_content_type == ContentType::BLOG) {
	if(str_starts_with($content_requested_url_part, "/article/")) {
		$requested_content_display_type = ContentDisplayType::ARTICLE;
	} else {
		$requested_content_display_type = ContentDisplayType::SEARCH;
	}
	$requested_tags[] = "blog";
} elseif($requested_content_type == ContentType::PROGRAMMING) {
	// May be changed later if a specific resource is requested and found.
	$requested_content_display_type = ContentDisplayType::SEARCH;
	$requested_tags[] = "programming";
	
	if(str_starts_with($content_requested_url_part, "/applications/")) {
		$requested_tags[] = "application";
	} elseif(str_starts_with($content_requested_url_part, "/tutorials/")) {
		$requested_tags[] = "tutorial";
	} elseif(str_starts_with($content_requested_url_part, "/tools/")) {
		$requested_tags[] = "tool";
	} elseif(str_starts_with($content_requested_url_part, "/purebasic/")) {
		$requested_tags[] = "purebasic";
	} elseif(str_starts_with($content_requested_url_part, "/python/")) {
		$requested_tags[] = "python";
	} elseif(str_starts_with($content_requested_url_part, "/java/")) {
		$requested_tags[] = "java";
	} elseif(str_starts_with($content_requested_url_part, "/others/")) {
		$requested_tags[] = "miscellaneous";
	} elseif(str_starts_with($content_requested_url_part, "/docker/")) {
		$requested_tags[] = "docker";
	} else {
		//$content_has_error = true;
		//$_content_error_message_key = "error.content.detect.subtype";
		//goto content_end;
	}
} elseif($requested_content_type == ContentType::ELECTRONICS) {
	// May be changed later if a specific resource is requested and found.
	$requested_content_display_type = ContentDisplayType::SEARCH;
	$requested_tags[] = "electronic";
	
	if(str_starts_with($content_requested_url_part, "/iot/")) {
		$requested_tags[] = "iot";
	} elseif(str_starts_with($content_requested_url_part, "/experiments/")) {
		$requested_tags[] = "experiment";
	} elseif(str_starts_with($content_requested_url_part, "/ham/")) {
		$requested_tags[] = "ham";
	} else {
		//$content_has_error = true;
		//$_content_error_message_key = "error.content.detect.subtype";
		//goto content_end;
	}
}

// Checking for errors preliminarily
if($requested_content_display_type == ContentDisplayType::NONE) {
	// Failed to detect what kind of content was requested.
	$content_has_error = true;
	$_content_error_message_key = "error.content.detect.display";
	goto content_end;
}

// TODO: Check with a raw root type if not set
if(count($requested_tags) == 0) {
	// Failed to detect the subtype of content requested when not a blog post.
	$content_has_error = true;
	$_content_error_message_key = "error.content.detect.tags";
	goto content_end;
}
$content_requested_url_part = preg_replace("^\/(java|python|purebasic|others|ham|iot|experiments|applications|tutorials|tools)^", "", $content_requested_url_part);

// TODO: Detect specific resource or additional tags and parameters

if($requested_content_display_type == ContentDisplayType::SEARCH) {
	// Loading the content index.
	$content_json = file_get_contents(realpath($dir_content . "/index.json"));
	$content_index_data = json_decode($content_json, true);
	unset($content_json);
	
	// Filtering out unwanted entries.
	$filtered_content_index_data = array();
	for($i = 0; $i < count($content_index_data); $i++) {
		if(count(array_intersect($content_index_data[$i]["tags"], $requested_tags)) == count($requested_tags)) {
			$filtered_content_index_data[] = $content_index_data[$i];
		}
	}
	
	// Cleaning some variables.
	unset($content_index_data);
	unset($content_json);
	
	// Checking if we found content for the user.
	if(count($filtered_content_index_data) == 0) {
		// No relevant article/page were found for the given tags.
		$content_has_error = true;
		$_content_error_message_key = "error.content.detect.empty";
		goto content_end;
	}
}
// TODO: Get relevant data


content_end:
$content_error_message = localize($_content_error_message_key);

// These function are placed here to prevent the main file from becoming impossible to read.
function startMainCard($iconClasses, $title, $subTitle) {
	echo('<div class="card p-0 mx-0"><div class="px-card py-10 border-bottom px-20"><div class="container-fluid">'.
		'<div class="row"><div class="col-4"><h2 class="card-title font-size-18 m-0"><i class="'.$iconClasses.
		'"></i>&nbsp;&nbsp;'.localize($title).'</h2></div><div class="col-8 text-right font-italic">'.
		'<h2 class="card-title font-size-18 m-0 text-super-muted">'.$subTitle.'</h2></div></div></div></div>');
}

function endMainCard() {
	echo('</div>');
}

?>