# Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and Contributors
# License: GNU General Public License v3. See license.txt


import json

import frappe
from frappe import _
from frappe.modules.utils import get_module_app
from frappe.utils import flt, has_common
from frappe.utils.user import is_website_user


def get_list_context(context=None):
	return {
		"global_number_format": frappe.db.get_default("number_format") or "#,###.##",
		"currency": frappe.db.get_default("currency"),
		"currency_symbols": json.dumps(
			dict(
				frappe.db.sql(
					"""select name, symbol
			from tabCurrency where enabled=1"""
				)
			)
		),
		"row_template": "templates/includes/transaction_row.html",
		"get_list": get_transaction_list,
	}


def get_webform_list_context(module):
	if get_module_app(module) != "erpnext":
		return
	return {"get_list": get_webform_transaction_list}


def get_webform_transaction_list(
	doctype, txt=None, filters=None, limit_start=0, limit_page_length=20, order_by="modified"
):
	"""Get List of transactions for custom doctypes"""
	from frappe.www.list import get_list

	if not filters:
		filters = []

	meta = frappe.get_meta(doctype)

	for d in meta.fields:
		if d.fieldtype == "Link" and d.fieldname != "amended_from":
			allowed_docs = [d.name for d in get_transaction_list(doctype=d.options, custom=True)]
			allowed_docs.append("")
			filters.append((d.fieldname, "in", allowed_docs))

	return get_list(
		doctype,
		txt,
		filters,
		limit_start,
		limit_page_length,
		ignore_permissions=False,
		fields=None,
		order_by="modified",
	)


def get_transaction_list(
	doctype,
	txt=None,
	filters=None,
	limit_start=0,
	limit_page_length=20,
	order_by="modified",
	custom=False,
):
	user = frappe.session.user
	ignore_permissions = False

	if not filters:
		filters = {}

	filters["docstatus"] = ["<", "2"] if doctype in ["Supplier Quotation", "Purchase Invoice"] else 1

	if (user != "Guest" and is_website_user()) or doctype == "Request for Quotation":
		parties_doctype = (
			"Request for Quotation Supplier" if doctype == "Request for Quotation" else doctype
		)
		# find party for this contact
		customers, suppliers = get_customers_suppliers(parties_doctype, user)

		if customers:
			if doctype == "Quotation":
				filters["quotation_to"] = "Customer"
				filters["party_name"] = ["in", customers]
			else:
				filters["customer"] = ["in", customers]
		elif suppliers:
			filters["supplier"] = ["in", suppliers]
		elif not custom:
			return []

		if doctype == "Request for Quotation":
			parties = customers or suppliers
			return rfq_transaction_list(parties_doctype, doctype, parties, limit_start, limit_page_length)

		# Since customers and supplier do not have direct access to internal doctypes
		ignore_permissions = True

		if not customers and not suppliers and custom:
			ignore_permissions = False
			filters = {}

	transactions = get_list_for_transactions(
		doctype,
		txt,
		filters,
		limit_start,
		limit_page_length,
		fields="name",
		ignore_permissions=ignore_permissions,
		order_by="modified desc",
	)

	if custom:
		return transactions

	return post_process(doctype, transactions)


def get_list_for_transactions(
	doctype,
	txt,
	filters,
	limit_start,
	limit_page_length=20,
	ignore_permissions=False,
	fields=None,
	order_by=None,
):
	"""Get List of transactions like Invoices, Orders"""
	from frappe.www.list import get_list

	meta = frappe.get_meta(doctype)
	data = []
	or_filters = []

	for d in get_list(
		doctype,
		txt,
		filters=filters,
		fields="name",
		limit_start=limit_start,
		limit_page_length=limit_page_length,
		ignore_permissions=ignore_permissions,
		order_by="modified desc",
	):
		data.append(d)

	if txt:
		if meta.get_field("items"):
			if meta.get_field("items").options:
				child_doctype = meta.get_field("items").options
				for item in frappe.get_all(child_doctype, {"item_name": ["like", "%" + txt + "%"]}):
					child = frappe.get_doc(child_doctype, item.name)
					or_filters.append([doctype, "name", "=", child.parent])

	if or_filters:
		for r in frappe.get_list(
			doctype,
			fields=fields,
			filters=filters,
			or_filters=or_filters,
			limit_start=limit_start,
			limit_page_length=limit_page_length,
			ignore_permissions=ignore_permissions,
			order_by=order_by,
		):
			data.append(r)

	return data


def rfq_transaction_list(parties_doctype, doctype, parties, limit_start, limit_page_length):
	data = frappe.db.sql(
		"""select distinct parent as name, supplier from `tab{doctype}`
			where supplier = '{supplier}' and docstatus=1  order by modified desc limit {start}, {len}""".format(
			doctype=parties_doctype, supplier=parties[0], start=limit_start, len=limit_page_length
		),
		as_dict=1,
	)

	return post_process(doctype, data)


def post_process(doctype, data):
	result = []
	for d in data:
		doc = frappe.get_doc(doctype, d.name)

		doc.status_percent = 0
		doc.status_display = []

		if doc.get("per_billed"):
			doc.status_percent += flt(doc.per_billed)
			doc.status_display.append(
				_("Billed") if doc.per_billed == 100 else _("{0}% Billed").format(doc.per_billed)
			)

		if doc.get("per_delivered"):
			doc.status_percent += flt(doc.per_delivered)
			doc.status_display.append(
				_("Delivered") if doc.per_delivered == 100 else _("{0}% Delivered").format(doc.per_delivered)
			)

		if hasattr(doc, "set_indicator"):
			doc.set_indicator()

		doc.status_display = ", ".join(doc.status_display)
		doc.items_preview = ", ".join(d.item_name for d in doc.items if d.item_name)
		result.append(doc)

	return result


def get_customers_suppliers(doctype, user):
	customers = []
	suppliers = []
	meta = frappe.get_meta(doctype)

	customer_field_name = get_customer_field_name(doctype)

	has_customer_field = meta.has_field(customer_field_name)
	has_supplier_field = meta.has_field("supplier")

	if has_common(["Supplier", "Customer"], frappe.get_roles(user)):
		contacts = frappe.db.sql(
			"""
			select
				`tabContact`.email_id,
				`tabDynamic Link`.link_doctype,
				`tabDynamic Link`.link_name
			from
				`tabContact`, `tabDynamic Link`
			where
				`tabContact`.name=`tabDynamic Link`.parent and `tabContact`.email_id =%s
			""",
			user,
			as_dict=1,
		)
		customers = [c.link_name for c in contacts if c.link_doctype == "Customer"]
		suppliers = [c.link_name for c in contacts if c.link_doctype == "Supplier"]
	elif frappe.has_permission(doctype, "read", user=user):
		customer_list = frappe.get_list("Customer")
		customers = suppliers = [customer.name for customer in customer_list]

	return customers if has_customer_field else None, suppliers if has_supplier_field else None


def has_website_permission(doc, ptype, user, verbose=False):
	doctype = doc.doctype
	customers, suppliers = get_customers_suppliers(doctype, user)
	if customers:
		return frappe.db.exists(doctype, get_customer_filter(doc, customers))
	elif suppliers:
		fieldname = "suppliers" if doctype == "Request for Quotation" else "supplier"
		return frappe.db.exists(doctype, {"name": doc.name, fieldname: ["in", suppliers]})
	else:
		return False


def get_customer_filter(doc, customers):
	doctype = doc.doctype
	filters = frappe._dict()
	filters.name = doc.name
	filters[get_customer_field_name(doctype)] = ["in", customers]
	if doctype == "Quotation":
		filters.quotation_to = "Customer"
	return filters


def get_customer_field_name(doctype):
	if doctype == "Quotation":
		return "party_name"
	else:
		return "customer"