@tool
class_name LanguageToolApiWrapper
extends Node

const BASE_URL := "https://api.languagetoolplus.com/v2"

func _make_request(endpoint: String, method: HTTPClient.Method = HTTPClient.METHOD_GET, data: Dictionary = {}, headers: Dictionary = {}):
	var url = BASE_URL + endpoint
	var scheme_split = url.split("://")
	var scheme = scheme_split[0]
	var rest = scheme_split[1]
	var host_and_path = rest.split("/", false, 1)
	var host = host_and_path[0]
	var path = "/" + host_and_path[1] if host_and_path.size() > 1 else "/"
	var port = 443 if scheme == "https" else 80

	var client = HTTPClient.new()
	var tlsOptions: TLSOptions = (TLSOptions.client() if scheme == "https" else null)
	var err = client.connect_to_host(host, port, tlsOptions)
	if err != OK:
		push_error("Failed to connect to host: " + str(err))
		return null

	while client.get_status() in [HTTPClient.STATUS_CONNECTING, HTTPClient.STATUS_RESOLVING]:
		client.poll()
		OS.delay_msec(10)

	var header_array = []
	for k in headers.keys():
		header_array.append(str(k) + ": " + str(headers[k]))

	var body = ""
	if method == HTTPClient.METHOD_POST:
		body = ""
		if data.size() > 0:
			body = client.query_string_from_dict(data)
		header_array.append("Content-Type: application/x-www-form-urlencoded")
		header_array.append("Content-Length: " + str(body.length()))
		client.request(HTTPClient.METHOD_POST, path, header_array, body)
	else:
		if data.size() > 0:
			path += "?" + client.query_string_from_dict(data)
		client.request(HTTPClient.METHOD_GET, path, header_array)

	while client.get_status() == HTTPClient.STATUS_REQUESTING:
		client.poll()
		OS.delay_msec(10)

	var response = ""
	while client.get_status() == HTTPClient.STATUS_BODY or client.has_response():
		client.poll()
		var chunk = client.read_response_body_chunk()
		if chunk.size() == 0:
			break
		response += chunk.get_string_from_utf8()
		OS.delay_msec(10)

	var resp_code = client.get_response_code()
	if resp_code != 200:
		push_error("HTTP error: " + str(resp_code) + "\\n" + response)
		return null

	var json = JSON.new()
	var json_err = json.parse(response)
	if json_err != OK:
		push_error("JSON parse error: " + str(json_err) + "\\n" + response)
		return null
	return json.get_data()

func check(text: String, language: String = "auto", opts: Dictionary = {}) -> LanguageToolCheckResponse:
	var data = {
		"text": text,
		"language": language
	}
	for k in opts.keys():
		data[k] = opts[k]
	print("Checking text: "+text)
	return  LanguageToolCheckResponse.new(_make_request("/check", HTTPClient.METHOD_POST, data))

func get_languages():
	return _make_request("/languages", HTTPClient.METHOD_GET)

func list_words(username: String, apiKey: String, offset: int = 0, limit: int = 10, dicts: String = ""):
	var data = {
		"username": username,
		"apiKey": apiKey,
		"offset": offset,
		"limit": limit
	}
	if dicts != "":
		data["dicts"] = dicts
	return _make_request("/words", HTTPClient.METHOD_GET, data)

func add_word(word: String, username: String, apiKey: String, dict: String = ""):
	var data = {
		"word": word,
		"username": username,
		"apiKey": apiKey
	}
	if dict != "":
		data["dict"] = dict
	return _make_request("/words/add", HTTPClient.METHOD_POST, data)

func delete_word(word: String, username: String, apiKey: String, dict: String = ""):
	var data = {
		"word": word,
		"username": username,
		"apiKey": apiKey
	}
	if dict != "":
		data["dict"] = dict
	return _make_request("/words/delete", HTTPClient.METHOD_POST, data)

static func percent_encode(text: String) -> String:
	return text.uri_encode()
	
class LanguageToolCheckResponse:
	
	# Software info
	var software_name: String
	var software_version: String
	var software_build_date: String
	var software_api_version: int
	var software_status: String = ""
	var software_premium: bool = false
	
	# Language info
	var language_name: String
	var language_code: String
	var detected_language_name: String
	var detected_language_code: String
	
	# Match structure
	class Match:
		var message: String
		var short_message: String = ""
		var offset: int
		var length: int
		var replacements: Array[String] = []
		var context_text: String
		var context_offset: int
		var context_length: int
		var sentence: String
		class Rule:
			var id: String
			var sub_id: String = ""
			var description: String
			var urls: Array[String] = []
			var issue_type: String = ""
			class Category:
				var id: String
				var name: String
			var category: Category
		var rule: Rule
	
	var matches: Array[Match] = []
	
	func _init(response: Variant) -> void:
		# Parse software
		var sw = response.software if response.has("software") else {}
		software_name = sw.name if sw.has("name") else ""
		software_version = sw.version if sw.has("version") else ""
		software_build_date = sw.buildDate if sw.has("buildDate") else ""
		software_api_version = sw.apiVersion if sw.has("apiVersion") else 0
		software_status = sw.status if sw.has("status") else ""
		software_premium = sw.premium if sw.has("premium") else false

		# Parse language
		var lang = response.language if response.has("language") else {}
		language_name = lang.name if lang.has("name") else ""
		language_code = lang.code if lang.has("code") else ""
		var det_lang = lang.detectedLanguage if lang.has("detectedLanguage") else {}
		detected_language_name = det_lang.name if det_lang.has("name") else ""
		detected_language_code = det_lang.code if det_lang.has("code") else ""

		# Parse matches
		matches = []
		var matches_arr = response.matches if response.has("matches") else []
		for m in matches_arr:
			var _match = Match.new()
			_match.message = m.message if m.has("message") else ""
			_match.short_message = m.shortMessage if m.has("shortMessage") else ""
			_match.offset = m.offset if m.has("offset") else 0
			_match.length = m.length if m.has("length") else 0
			#_match.replacements = []
			var replacements_arr = m.replacements if m.has("replacements") else []
			for r in replacements_arr:
				_match.replacements.append(r.value if r.has("value") else "")
			var ctx = m.context if m.has("context") else {}
			_match.context_text = ctx.text if ctx.has("text") else ""
			_match.context_offset = ctx.offset if ctx.has("offset") else 0
			_match.context_length = ctx.length if ctx.has("length") else 0
			_match.sentence = m.sentence if m.has("sentence") else ""
			var rule_dict = m.rule if m.has("rule") else {}
			var rule = Match.Rule.new()
			rule.id = rule_dict.id if rule_dict.has("id") else ""
			rule.sub_id = rule_dict.subId if rule_dict.has("subId") else ""
			rule.description = rule_dict.description if rule_dict.has("description") else ""
			#rule.urls = []
			var urls_arr = rule_dict.urls if rule_dict.has("urls") else []
			for u in urls_arr:
				rule.urls.append(u.value if u.has("value") else "")
			rule.issue_type = rule_dict.issueType if rule_dict.has("issueType") else ""
			var cat = rule_dict.category if rule_dict.has("category") else {}
			var category = Match.Rule.Category.new()
			category.id = cat.id if cat.has("id") else ""
			category.name = cat.name if cat.has("name") else ""
			rule.category = category
			_match.rule = rule
			matches.append(_match)