# Copyright (c) 2015, InfluxFramework LLC
# License: MIT. See LICENSE
import io
import os

import influxframework
from influxframework.build import scrub_html_template
from influxframework.model.meta import Meta
from influxframework.model.utils import render_include
from influxframework.modules import get_module_path, load_doctype_module, scrub
from influxframework.translate import extract_messages_from_code, make_dict_from_messages
from influxframework.utils import get_html_format

ASSET_KEYS = (
	"__js",
	"__css",
	"__list_js",
	"__calendar_js",
	"__map_js",
	"__linked_with",
	"__messages",
	"__print_formats",
	"__workflow_docs",
	"__form_grid_templates",
	"__listview_template",
	"__tree_js",
	"__dashboard",
	"__kanban_column_fields",
	"__templates",
	"__custom_js",
	"__custom_list_js",
)


def get_meta(doctype, cached=True):
	# don't cache for developer mode as js files, templates may be edited
	if cached and not influxframework.conf.developer_mode:
		meta = influxframework.cache().hget("doctype_form_meta", doctype)
		if not meta:
			meta = FormMeta(doctype)
			influxframework.cache().hset("doctype_form_meta", doctype, meta)
	else:
		meta = FormMeta(doctype)

	if influxframework.local.lang != "en":
		meta.set_translations(influxframework.local.lang)

	return meta


class FormMeta(Meta):
	def __init__(self, doctype):
		super().__init__(doctype)
		self.load_assets()

	def load_assets(self):
		if self.get("__assets_loaded", False):
			return

		self.add_search_fields()
		self.add_linked_document_type()

		if not self.istable:
			self.add_code()
			self.add_custom_script()
			self.load_print_formats()
			self.load_workflows()
			self.load_templates()
			self.load_dashboard()
			self.load_kanban_meta()

		self.set("__assets_loaded", True)

	def as_dict(self, no_nulls=False):
		d = super().as_dict(no_nulls=no_nulls)

		for k in ASSET_KEYS:
			d[k] = self.get(k)

		# d['fields'] = d.get('fields', [])

		for i, df in enumerate(d.get("fields") or []):
			for k in ("search_fields", "is_custom_field", "linked_document_type"):
				df[k] = self.get("fields")[i].get(k)

		return d

	def add_code(self):
		if self.custom:
			return

		path = os.path.join(get_module_path(self.module), "doctype", scrub(self.name))

		def _get_path(fname):
			return os.path.join(path, scrub(fname))

		system_country = influxframework.get_system_settings("country")

		self._add_code(_get_path(self.name + ".js"), "__js")
		if system_country:
			self._add_code(_get_path(os.path.join("regional", system_country + ".js")), "__js")

		self._add_code(_get_path(self.name + ".css"), "__css")
		self._add_code(_get_path(self.name + "_list.js"), "__list_js")
		if system_country:
			self._add_code(_get_path(os.path.join("regional", system_country + "_list.js")), "__list_js")

		self._add_code(_get_path(self.name + "_calendar.js"), "__calendar_js")
		self._add_code(_get_path(self.name + "_tree.js"), "__tree_js")

		listview_template = _get_path(self.name + "_list.html")
		if os.path.exists(listview_template):
			self.set("__listview_template", get_html_format(listview_template))

		self.add_code_via_hook("doctype_js", "__js")
		self.add_code_via_hook("doctype_list_js", "__list_js")
		self.add_code_via_hook("doctype_tree_js", "__tree_js")
		self.add_code_via_hook("doctype_calendar_js", "__calendar_js")
		self.add_html_templates(path)

	def _add_code(self, path, fieldname):
		js = get_js(path)
		if js:
			comment = f"\n\n/* Adding {path} */\n\n"
			sourceURL = f"\n\n//# sourceURL={scrub(self.name) + fieldname}"
			self.set(fieldname, (self.get(fieldname) or "") + comment + js + sourceURL)

	def add_html_templates(self, path):
		if self.custom:
			return
		templates = dict()
		for fname in os.listdir(path):
			if fname.endswith(".html"):
				with open(os.path.join(path, fname), encoding="utf-8") as f:
					templates[fname.split(".")[0]] = scrub_html_template(f.read())

		self.set("__templates", templates or None)

	def add_code_via_hook(self, hook, fieldname):
		for path in get_code_files_via_hooks(hook, self.name):
			self._add_code(path, fieldname)

	def add_custom_script(self):
		"""embed all require files"""
		# custom script
		client_scripts = (
			influxframework.get_all(
				"Client Script",
				filters={"dt": self.name, "enabled": 1},
				fields=["name", "script", "view"],
				order_by="creation asc",
			)
			or ""
		)

		list_script = ""
		form_script = ""
		for script in client_scripts:
			if script.view == "List":
				list_script += f"""
// {script.name}
{script.script}

"""

			if script.view == "Form":
				form_script += f"""
// {script.name}
{script.script}

"""

		file = scrub(self.name)
		form_script += f"\n\n//# sourceURL={file}__custom_js"
		list_script += f"\n\n//# sourceURL={file}__custom_list_js"

		self.set("__custom_js", form_script)
		self.set("__custom_list_js", list_script)

	def add_search_fields(self):
		"""add search fields found in the doctypes indicated by link fields' options"""
		for df in self.get("fields", {"fieldtype": "Link", "options": ["!=", "[Select]"]}):
			if df.options:
				search_fields = influxframework.get_meta(df.options).search_fields
				if search_fields:
					search_fields = search_fields.split(",")
					df.search_fields = [sf.strip() for sf in search_fields]

	def add_linked_document_type(self):
		for df in self.get("fields", {"fieldtype": "Link"}):
			if df.options:
				try:
					df.linked_document_type = influxframework.get_meta(df.options).document_type
				except influxframework.DoesNotExistError:
					# edge case where options="[Select]"
					pass

	def load_print_formats(self):
		print_formats = influxframework.db.sql(
			"""select * FROM `tabPrint Format`
			WHERE doc_type=%s AND docstatus<2 and disabled=0""",
			(self.name,),
			as_dict=1,
			update={"doctype": "Print Format"},
		)

		self.set("__print_formats", print_formats)

	def load_workflows(self):
		# get active workflow
		workflow_name = self.get_workflow()
		workflow_docs = []

		if workflow_name and influxframework.db.exists("Workflow", workflow_name):
			workflow = influxframework.get_doc("Workflow", workflow_name)
			workflow_docs.append(workflow)

			for d in workflow.get("states"):
				workflow_docs.append(influxframework.get_doc("Workflow State", d.state))

		self.set("__workflow_docs", workflow_docs)

	def load_templates(self):
		if not self.custom:
			module = load_doctype_module(self.name)
			app = module.__name__.split(".")[0]
			templates = {}
			if hasattr(module, "form_grid_templates"):
				for key, path in module.form_grid_templates.items():
					templates[key] = get_html_format(influxframework.get_app_path(app, path))

				self.set("__form_grid_templates", templates)

	def set_translations(self, lang):
		self.set("__messages", influxframework.get_lang_dict("doctype", self.name))

		# set translations for grid templates
		if self.get("__form_grid_templates"):
			for content in self.get("__form_grid_templates").values():
				messages = extract_messages_from_code(content)
				messages = make_dict_from_messages(messages)
				self.get("__messages").update(messages)

	def load_dashboard(self):
		self.set("__dashboard", self.get_dashboard_data())

	def load_kanban_meta(self):
		self.load_kanban_column_fields()

	def load_kanban_column_fields(self):
		try:
			values = influxframework.get_list(
				"Kanban Board", fields=["field_name"], filters={"reference_doctype": self.name}
			)

			fields = [x["field_name"] for x in values]
			fields = list(set(fields))
			self.set("__kanban_column_fields", fields)
		except influxframework.PermissionError:
			# no access to kanban board
			pass


def get_code_files_via_hooks(hook, name):
	code_files = []
	for app_name in influxframework.get_installed_apps():
		code_hook = influxframework.get_hooks(hook, default={}, app_name=app_name)
		if not code_hook:
			continue

		files = code_hook.get(name, [])
		if not isinstance(files, list):
			files = [files]

		for file in files:
			path = influxframework.get_app_path(app_name, *file.strip("/").split("/"))
			code_files.append(path)

	return code_files


def get_js(path):
	js = influxframework.read_file(path)
	if js:
		return render_include(js)
