tool 
extends Control


export (String) var documentation_path:String = "res://addons/dialogic/Documentation"







var use_folder_files = true


var file_ignore_list = ["Welcome.md"]














func get_documentation_content():
	return get_dir_contents(documentation_path + "/Content")











func build_documentation_tree(tree:Tree, root_item:TreeItem = null, def_folder_info:Dictionary = {}, def_page_info:Dictionary = {}, filter_term:String = ""):
	return _build_documentation_tree(tree, root_item, def_folder_info, def_page_info, filter_term)










func get_dir_contents(rootPath:String)->Dictionary:
	var directory_structure = {}
	var dir: = Directory.new()

	if dir.open(rootPath) == OK:
		dir.list_dir_begin(true, false)
		directory_structure = _add_dir_contents(dir)
	else :
		push_error("Docs: An error occurred when trying to access the path.")
	return directory_structure

func _add_dir_contents(dir:Directory)->Dictionary:
	var file_name = dir.get_next()

	var structure = {}
	while (file_name != ""):
		var path = dir.get_current_dir() + "/" + file_name
		if dir.current_is_dir():
			
			var subDir = Directory.new()
			subDir.open(path)
			subDir.list_dir_begin(true, false)
			var dir_content = _add_dir_contents(subDir)
			if dir_content.has("_files_"):
				structure[path] = dir_content
		else :
			
			if not file_name.ends_with(".md"):
				file_name = dir.get_next()
				continue
			if file_name in file_ignore_list:
				file_name = dir.get_next()
				continue
			if not structure.has("_files_"):
				structure["_files_"] = []
			
			structure["_files_"].append(path)

		file_name = dir.get_next()
	dir.list_dir_end()
	return structure




func _build_documentation_tree(tree:Tree, root_item:TreeItem = null, def_folder_info:Dictionary = {}, def_page_info:Dictionary = {}, filter_term:String = ""):

	var documentation_tree
	if root_item == null:
		documentation_tree = tree.create_item()
		documentation_tree.set_text(0, "Documentation")
		
	else :
		documentation_tree = root_item
	
	
	if not filter_term:
		documentation_tree.collapsed = true
	else :
		documentation_tree.collapsed = false
	
	
	var doc_structure = get_documentation_content()
	
	create_doc_tree(tree, documentation_tree, def_folder_info, def_page_info, doc_structure, filter_term)
	return documentation_tree


func create_doc_tree(tree, parent_item, def_folder_info, def_page_info, doc_structure, filter_term):
	for key in doc_structure.keys():
		
		if typeof(doc_structure[key]) == TYPE_DICTIONARY:
			var folder_item = _add_documentation_folder(tree, parent_item, {"name":key.get_file(), "path":key}, def_folder_info)
			create_doc_tree(tree, folder_item, def_folder_info, def_page_info, doc_structure[key], filter_term)
			if not filter_term:
				folder_item.collapsed = true
		
		elif typeof(doc_structure[key]) == TYPE_ARRAY:
			for file in doc_structure[key]:
				if use_folder_files and file.trim_suffix(".md") in doc_structure.keys():
					pass
				else :
					if not filter_term or (filter_term and filter_term.to_lower() in get_title(file, "").to_lower()):
						_add_documentation_page(tree, parent_item, {"name":file.get_file().trim_suffix(".md"), "path":file}, def_page_info)

func merge_dir(target:Dictionary, patch:Dictionary):
	var copy = target.duplicate()
	for key in patch:
		copy[key] = patch[key]
	return copy


func _add_documentation_folder(tree, parent_item, folder_info, default_info):
	var item = tree.create_item(parent_item)
	item.set_text(0, folder_info["name"])
	item.set_icon(0, tree.get_icon("HelpSearch", "EditorIcons"))
	item.set_editable(0, false)
	if use_folder_files:
		var x = File.new()
		if x.file_exists(folder_info["path"] + ".md"):
			folder_info["path"] += ".md"
		else :
			folder_info["path"] = ""
	else :
		folder_info["path"] = ""
	item.set_metadata(0, merge_dir(default_info, folder_info))
	if not tree.get_constant("dark_theme", "Editor"):
		item.set_icon_modulate(0, get_color("property_color", "Editor"))
	return item


func _add_documentation_page(tree, parent, page_info, default_info):
	var item = tree.create_item(parent)
	item.set_text(0, get_title(page_info["path"], page_info["name"]))
	item.set_tooltip(0, page_info["path"])
	item.set_editable(0, false)
	item.set_icon(0, tree.get_icon("Help", "EditorIcons"))
	var new_dir = merge_dir(default_info, page_info)
	
	item.set_metadata(0, new_dir)
	if not tree.get_constant("dark_theme", "Editor"):
		item.set_icon_modulate(0, get_color("property_color", "Editor"))
	return item


func get_title(path, default_name):
	
	var f = File.new()
	f.open(path, File.READ)
	var arr = f.get_as_text().split("\n", false, 1)
	if not arr.empty():
		return arr[0].trim_prefix("#").strip_edges()
	else :
		return default_name






func search_and_select_docs(docs_tree_item:TreeItem, info:String, key:String = "path"):
	if info == "":return 
	if info == "/":
		docs_tree_item.select(0)
		return true
	
	
	var item = docs_tree_item.get_children()
	while item:
		
		if not item.has_method("get_metadata"):
			item = item.get_next()
		
		var meta = item.get_metadata(0)
		
		if meta.has(key):
			if meta[key] == info:
				item.select(0)
				return true
		if search_and_select_docs(item, info, key):
			return true
		item = item.get_next()
	return false