"""Automatically setup docs for a project

Call from command line:

	bench frappe --setup_docs app docs_app path

"""

import os, json, frappe

class setup_docs(object):
	def __init__(self, app, docs_app, path):
		"""Generate source templates for models reference and module API.

		Must set globals `self.models_base_path`, `self.api_base_path` and `self.app_path`.
		"""
		self.app = app
		self.app_path = frappe.get_app_path(app)
		if path[0]=="/": path = path[1:]
		path = frappe.get_app_path(docs_app, path)
		self.models_base_path = os.path.join(path, "models")
		self.api_base_path = os.path.join(path, "api")

		for basepath, folders, files in os.walk(self.app_path):
			if "doctype" not in basepath:
				if "doctype" in folders:
					module = os.path.basename(basepath)

					module_folder = os.path.join(self.models_base_path, module)

					self.make_folder(module_folder)
					self.update_index_txt(module_folder)

			if "doctype" in basepath:
				parts = basepath.split("/")
				#print parts
				module, doctype = parts[-3], parts[-1]

				if doctype not in ("doctype", "boilerplate"):
					self.write_model_file(basepath, module, doctype)

			elif self.is_py_module(basepath, folders, files):
				self.write_modules(basepath, folders, files)

	def is_py_module(self, basepath, folders, files):
		return "__init__.py" in files \
			and (not "/doctype" in basepath) \
			and (not "/patches" in basepath) \
			and (not "/change_log" in basepath) \
			and (not "/report" in basepath) \
			and (not "/page" in basepath) \
			and (not "/templates" in basepath) \
			and (not "/tests" in basepath) \
			and (not "doctype" in folders)

	def write_modules(self, basepath, folders, files):
		module_folder = os.path.join(self.api_base_path, os.path.relpath(basepath, self.app_path))
		self.make_folder(module_folder)

		for f in files:
			if f.endswith(".py"):
				module_name = os.path.relpath(os.path.join(basepath, f),
					self.app_path)[:-3].replace("/", ".").replace(".__init__", "")

				module_doc_path = os.path.join(module_folder,
					self.app + "." + module_name + ".html")

				self.make_folder(basepath)

				if not os.path.exists(module_doc_path):
					print "Writing " + module_doc_path
					with open(module_doc_path, "w") as f:
						f.write("""<h1>%(name)s</h1>

	<!-- title: %(name)s -->
	{%%- from "templates/autodoc/macros.html" import automodule -%%}

	{{ automodule("%(name)s") }}""" % {"name": self.app + "." + module_name})

		self.update_index_txt(module_folder)

	def make_folder(self, path):
		if not os.path.exists(path):
			os.makedirs(path)

		index_txt_path = os.path.join(path, "index.txt")
		if not os.path.exists(index_txt_path):
			print "Writing " + index_txt_path
			with open(index_txt_path, "w") as f:
				f.write("")

		index_md_path = os.path.join(path, "index.html")
		if not os.path.exists(index_md_path):
			name = os.path.basename(path)
			if name==".":
				name = self.app
			print "Writing " + index_md_path
			with open(index_md_path, "w") as f:
				f.write("""<h1>{0}</h1>
<!-- title: {0} -->
{{index}}""".format(name))

	def update_index_txt(self, path):
		index_txt_path = os.path.join(path, "index.txt")
		pages = filter(lambda d: (d.endswith(".html") and d!="index.html") \
			or os.path.isdir(os.path.join(path, d)), os.listdir(path))
		pages = [d.rsplit(".", 1)[0] for d in pages]

		with open(index_txt_path, "r") as f:
			index_parts = filter(None, f.read().splitlines())

		if not set(pages).issubset(set(index_parts)):
			print "Updating " + index_txt_path
			with open(index_txt_path, "w") as f:
				f.write("\n".join(pages))

	def write_model_file(self, basepath, module, doctype):
		model_path = os.path.join(self.models_base_path, module, doctype + ".html")

		if not os.path.exists(model_path):
			model_json_path = os.path.join(basepath, doctype + ".json")
			if os.path.exists(model_json_path):
				with open(model_json_path, "r") as j:
					doctype_real_name = json.loads(j.read()).get("name")

				print "Writing " + model_path

				with open(model_path, "w") as f:
					f.write("""<h1>%(doctype)s</h1>

	<!-- title: %(doctype)s -->
	{%% from "templates/autodoc/doctype.html" import render_doctype %%}

	{{ render_doctype("%(doctype)s") }}

	<!-- jinja --><!-- static -->
	""" % {"doctype": doctype_real_name})