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


import frappe
import frappe.share
from frappe import _
from frappe.utils import cint, flt, get_time, now_datetime

from erpnext.controllers.status_updater import StatusUpdater


class UOMMustBeIntegerError(frappe.ValidationError):
	pass


class TransactionBase(StatusUpdater):
	def validate_posting_time(self):
		# set Edit Posting Date and Time to 1 while data import
		if frappe.flags.in_import and self.posting_date:
			self.set_posting_time = 1

		if not getattr(self, "set_posting_time", None):
			now = now_datetime()
			self.posting_date = now.strftime("%Y-%m-%d")
			self.posting_time = now.strftime("%H:%M:%S.%f")
		elif self.posting_time:
			try:
				get_time(self.posting_time)
			except ValueError:
				frappe.throw(_("Invalid Posting Time"))

	def validate_uom_is_integer(self, uom_field, qty_fields):
		validate_uom_is_integer(self, uom_field, qty_fields)

	def validate_with_previous_doc(self, ref):
		self.exclude_fields = ["conversion_factor", "uom"] if self.get("is_return") else []

		for key, val in ref.items():
			is_child = val.get("is_child_table")
			ref_doc = {}
			item_ref_dn = []
			for d in self.get_all_children(self.doctype + " Item"):
				ref_dn = d.get(val["ref_dn_field"])
				if ref_dn:
					if is_child:
						self.compare_values({key: [ref_dn]}, val["compare_fields"], d)
						if ref_dn not in item_ref_dn:
							item_ref_dn.append(ref_dn)
						elif not val.get("allow_duplicate_prev_row_id"):
							frappe.throw(_("Duplicate row {0} with same {1}").format(d.idx, key))
					elif ref_dn:
						ref_doc.setdefault(key, [])
						if ref_dn not in ref_doc[key]:
							ref_doc[key].append(ref_dn)
			if ref_doc:
				self.compare_values(ref_doc, val["compare_fields"])

	def compare_values(self, ref_doc, fields, doc=None):
		for reference_doctype, ref_dn_list in ref_doc.items():
			for reference_name in ref_dn_list:
				prevdoc_values = frappe.db.get_value(
					reference_doctype, reference_name, [d[0] for d in fields], as_dict=1
				)

				if not prevdoc_values:
					frappe.throw(_("Invalid reference {0} {1}").format(reference_doctype, reference_name))

				for field, condition in fields:
					if prevdoc_values[field] is not None and field not in self.exclude_fields:
						self.validate_value(field, condition, prevdoc_values[field], doc)

	def validate_rate_with_reference_doc(self, ref_details):
		buying_doctypes = ["Purchase Order", "Purchase Invoice", "Purchase Receipt"]

		if self.doctype in buying_doctypes:
			action = frappe.db.get_single_value("Buying Settings", "maintain_same_rate_action")
			settings_doc = "Buying Settings"
		else:
			action = frappe.db.get_single_value("Selling Settings", "maintain_same_rate_action")
			settings_doc = "Selling Settings"

		for ref_dt, ref_dn_field, ref_link_field in ref_details:
			for d in self.get("items"):
				if d.get(ref_link_field):
					ref_rate = frappe.db.get_value(ref_dt + " Item", d.get(ref_link_field), "rate")

					if abs(flt(d.rate - ref_rate, d.precision("rate"))) >= 0.01:
						if action == "Stop":
							role_allowed_to_override = frappe.db.get_single_value(
								settings_doc, "role_to_override_stop_action"
							)

							if role_allowed_to_override not in frappe.get_roles():
								frappe.throw(
									_("Row #{0}: Rate must be same as {1}: {2} ({3} / {4})").format(
										d.idx, ref_dt, d.get(ref_dn_field), d.rate, ref_rate
									)
								)
						else:
							frappe.msgprint(
								_("Row #{0}: Rate must be same as {1}: {2} ({3} / {4})").format(
									d.idx, ref_dt, d.get(ref_dn_field), d.rate, ref_rate
								),
								title=_("Warning"),
								indicator="orange",
							)

	def get_link_filters(self, for_doctype):
		if hasattr(self, "prev_link_mapper") and self.prev_link_mapper.get(for_doctype):
			fieldname = self.prev_link_mapper[for_doctype]["fieldname"]

			values = filter(None, tuple(item.as_dict()[fieldname] for item in self.items))

			if values:
				ret = {for_doctype: {"filters": [[for_doctype, "name", "in", values]]}}
			else:
				ret = None
		else:
			ret = None

		return ret

	def reset_default_field_value(self, default_field: str, child_table: str, child_table_field: str):
		"""Reset "Set default X" fields on forms to avoid confusion.

		example:
		        doc = {
		                "set_from_warehouse": "Warehouse A",
		                "items": [{"from_warehouse": "warehouse B"}, {"from_warehouse": "warehouse A"}],
		        }
		        Since this has dissimilar values in child table, the default field will be erased.

		        doc.reset_default_field_value("set_from_warehouse", "items", "from_warehouse")
		"""
		child_table_values = set()

		for row in self.get(child_table):
			child_table_values.add(row.get(child_table_field))

		if len(child_table_values) > 1:
			self.set(default_field, None)


def delete_events(ref_type, ref_name):
	events = (
		frappe.db.sql_list(
			""" SELECT
			distinct `tabEvent`.name
		from
			`tabEvent`, `tabEvent Participants`
		where
			`tabEvent`.name = `tabEvent Participants`.parent
			and `tabEvent Participants`.reference_doctype = %s
			and `tabEvent Participants`.reference_docname = %s
		""",
			(ref_type, ref_name),
		)
		or []
	)

	if events:
		frappe.delete_doc("Event", events, for_reload=True)


def validate_uom_is_integer(doc, uom_field, qty_fields, child_dt=None):
	if isinstance(qty_fields, str):
		qty_fields = [qty_fields]

	distinct_uoms = list(set(d.get(uom_field) for d in doc.get_all_children()))
	integer_uoms = list(
		filter(
			lambda uom: frappe.db.get_value("UOM", uom, "must_be_whole_number", cache=True) or None,
			distinct_uoms,
		)
	)

	if not integer_uoms:
		return

	for d in doc.get_all_children(parenttype=child_dt):
		if d.get(uom_field) in integer_uoms:
			for f in qty_fields:
				qty = d.get(f)
				if qty:
					if abs(cint(qty) - flt(qty)) > 0.0000001:
						frappe.throw(
							_(
								"Row {1}: Quantity ({0}) cannot be a fraction. To allow this, disable '{2}' in UOM {3}."
							).format(
								qty, d.idx, frappe.bold(_("Must be Whole Number")), frappe.bold(d.get(uom_field))
							),
							UOMMustBeIntegerError,
						)