perf: Optimization of gl entry processing logic in period closing voucher
diff --git a/erpnext/accounts/doctype/gl_entry/gl_entry.py b/erpnext/accounts/doctype/gl_entry/gl_entry.py
index 9f71656..1987c83 100644
--- a/erpnext/accounts/doctype/gl_entry/gl_entry.py
+++ b/erpnext/accounts/doctype/gl_entry/gl_entry.py
@@ -42,7 +42,7 @@
 		self.validate_and_set_fiscal_year()
 		self.pl_must_have_cost_center()
 
-		if not self.flags.from_repost:
+		if not self.flags.from_repost and self.voucher_type != "Period Closing Voucher":
 			self.check_mandatory()
 			self.validate_cost_center()
 			self.check_pl_account()
@@ -51,7 +51,7 @@
 
 	def on_update(self):
 		adv_adj = self.flags.adv_adj
-		if not self.flags.from_repost:
+		if not self.flags.from_repost and self.voucher_type != "Period Closing Voucher":
 			self.validate_account_details(adv_adj)
 			self.validate_dimensions_for_pl_and_bs()
 			self.validate_allowed_dimensions()
diff --git a/erpnext/accounts/doctype/period_closing_voucher/period_closing_voucher.json b/erpnext/accounts/doctype/period_closing_voucher/period_closing_voucher.json
index 84c941e..9574264 100644
--- a/erpnext/accounts/doctype/period_closing_voucher/period_closing_voucher.json
+++ b/erpnext/accounts/doctype/period_closing_voucher/period_closing_voucher.json
@@ -10,10 +10,11 @@
   "fiscal_year",
   "amended_from",
   "company",
-  "cost_center_wise_pnl",
   "column_break1",
   "closing_account_head",
-  "remarks"
+  "remarks",
+  "status",
+  "error_message"
  ],
  "fields": [
   {
@@ -86,17 +87,26 @@
    "reqd": 1
   },
   {
-   "default": "0",
-   "fieldname": "cost_center_wise_pnl",
-   "fieldtype": "Check",
-   "label": "Book Cost Center Wise Profit/Loss"
+   "depends_on": "eval:doc.docstatus!=0",
+   "fieldname": "status",
+   "fieldtype": "Select",
+   "label": "GL Entry Processing Status",
+   "options": "In Progress\nCompleted\nFailed",
+   "read_only": 1
+  },
+  {
+   "depends_on": "eval:doc.status=='Failed'",
+   "fieldname": "error_message",
+   "fieldtype": "Text",
+   "label": "Error Message",
+   "read_only": 1
   }
  ],
  "icon": "fa fa-file-text",
  "idx": 1,
  "is_submittable": 1,
  "links": [],
- "modified": "2021-05-20 15:27:37.210458",
+ "modified": "2022-07-15 14:51:04.714154",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Period Closing Voucher",
diff --git a/erpnext/accounts/doctype/period_closing_voucher/period_closing_voucher.py b/erpnext/accounts/doctype/period_closing_voucher/period_closing_voucher.py
index 5a86376..7022a9e 100644
--- a/erpnext/accounts/doctype/period_closing_voucher/period_closing_voucher.py
+++ b/erpnext/accounts/doctype/period_closing_voucher/period_closing_voucher.py
@@ -20,13 +20,26 @@
 		self.validate_posting_date()
 
 	def on_submit(self):
+		self.status = "In Progress"
 		self.make_gl_entries()
 
 	def on_cancel(self):
+		self.status = "In Progress"
 		self.ignore_linked_doctypes = ("GL Entry", "Stock Ledger Entry")
-		from erpnext.accounts.general_ledger import make_reverse_gl_entries
-
-		make_reverse_gl_entries(voucher_type="Period Closing Voucher", voucher_no=self.name)
+		gle_count = frappe.db.count(
+			"GL Entry", 
+			{
+				"voucher_type": "Period Closing Voucher",
+				"voucher_no": self.name,
+				"is_cancelled": 0
+			}
+		)
+		if gle_count > 5000:
+			frappe.enqueue(make_reverse_gl_entries, voucher_type="Period Closing Voucher",
+				voucher_no=self.name, queue="long")
+			frappe.msgprint(_("The GL Entries will be cancelled in the background, it can take a few minutes."), alert=True)
+		else:
+			make_reverse_gl_entries(voucher_type="Period Closing Voucher", voucher_no=self.name)
 
 	def validate_account_head(self):
 		closing_account_type = frappe.db.get_value("Account", self.closing_account_head, "root_type")
@@ -63,116 +76,138 @@
 					pce[0][0], self.posting_date
 				)
 			)
-
+	
 	def make_gl_entries(self):
 		gl_entries = self.get_gl_entries()
 		if gl_entries:
-			from erpnext.accounts.general_ledger import make_gl_entries
-
-			make_gl_entries(gl_entries)
+			if len(gl_entries) > 5000:
+				frappe.enqueue(process_gl_entries, gl_entries=gl_entries, queue="long")
+				frappe.msgprint(_("The GL Entries will be processed in the background, it can take a few minutes."), alert=True)
+			else:
+				process_gl_entries(gl_entries)
 
 	def get_gl_entries(self):
 		gl_entries = []
-		pl_accounts = self.get_pl_balances()
 
-		for acc in pl_accounts:
+		# pl account
+		for acc in self.get_pl_balances_based_on_dimensions(group_by_account=True):
+			if flt(acc.bal_in_company_currency):	
+				gl_entries.append(self.get_gle_for_pl_account(acc))
+
+		# closing liability account
+		for acc in self.get_pl_balances_based_on_dimensions(group_by_account=False):
 			if flt(acc.bal_in_company_currency):
-				gl_entries.append(
-					self.get_gl_dict(
-						{
-							"account": acc.account,
-							"cost_center": acc.cost_center,
-							"finance_book": acc.finance_book,
-							"account_currency": acc.account_currency,
-							"debit_in_account_currency": abs(flt(acc.bal_in_account_currency))
-							if flt(acc.bal_in_account_currency) < 0
-							else 0,
-							"debit": abs(flt(acc.bal_in_company_currency))
-							if flt(acc.bal_in_company_currency) < 0
-							else 0,
-							"credit_in_account_currency": abs(flt(acc.bal_in_account_currency))
-							if flt(acc.bal_in_account_currency) > 0
-							else 0,
-							"credit": abs(flt(acc.bal_in_company_currency))
-							if flt(acc.bal_in_company_currency) > 0
-							else 0,
-						},
-						item=acc,
-					)
-				)
-
-		if gl_entries:
-			gle_for_net_pl_bal = self.get_pnl_gl_entry(pl_accounts)
-			gl_entries += gle_for_net_pl_bal
+				gl_entries.append(self.get_gle_for_closing_account(acc))
 
 		return gl_entries
+	
+	def get_gle_for_pl_account(self, acc):
+		gl_entry = self.get_gl_dict(
+			{
+				"account": acc.account,
+				"cost_center": acc.cost_center,
+				"finance_book": acc.finance_book,
+				"account_currency": acc.account_currency,
+				"debit_in_account_currency": abs(flt(acc.bal_in_account_currency))
+					if flt(acc.bal_in_account_currency) < 0
+					else 0,
+				"debit": abs(flt(acc.bal_in_company_currency))
+					if flt(acc.bal_in_company_currency) < 0
+					else 0,
+				"credit_in_account_currency": abs(flt(acc.bal_in_account_currency))
+					if flt(acc.bal_in_account_currency) > 0
+					else 0,
+				"credit": abs(flt(acc.bal_in_company_currency))
+					if flt(acc.bal_in_company_currency) > 0
+					else 0,
+			},
+			item=acc,
+		)
+		self.update_default_dimensions(gl_entry, acc)
+		return gl_entry
+	
+	def get_gle_for_closing_account(self, acc):
+		gl_entry = self.get_gl_dict(
+			{
+				"account": self.closing_account_head,
+				"cost_center": acc.cost_center,
+				"finance_book": acc.finance_book,
+				"account_currency": acc.account_currency,
+				"debit_in_account_currency": abs(flt(acc.bal_in_account_currency))
+				if flt(acc.bal_in_account_currency) > 0
+				else 0,
+				"debit": abs(flt(acc.bal_in_company_currency))
+				if flt(acc.bal_in_company_currency) > 0
+				else 0,
+				"credit_in_account_currency": abs(flt(acc.bal_in_account_currency))
+				if flt(acc.bal_in_account_currency) < 0
+				else 0,
+				"credit": abs(flt(acc.bal_in_company_currency))
+				if flt(acc.bal_in_company_currency) < 0
+				else 0,
+			},
+			item=acc,
+		)
+		self.update_default_dimensions(gl_entry, acc)
+		return gl_entry
 
-	def get_pnl_gl_entry(self, pl_accounts):
-		company_cost_center = frappe.db.get_value("Company", self.company, "cost_center")
-		gl_entries = []
-
-		for acc in pl_accounts:
-			if flt(acc.bal_in_company_currency):
-				cost_center = acc.cost_center if self.cost_center_wise_pnl else company_cost_center
-				gl_entry = self.get_gl_dict(
-					{
-						"account": self.closing_account_head,
-						"cost_center": cost_center,
-						"finance_book": acc.finance_book,
-						"account_currency": acc.account_currency,
-						"debit_in_account_currency": abs(flt(acc.bal_in_account_currency))
-						if flt(acc.bal_in_account_currency) > 0
-						else 0,
-						"debit": abs(flt(acc.bal_in_company_currency))
-						if flt(acc.bal_in_company_currency) > 0
-						else 0,
-						"credit_in_account_currency": abs(flt(acc.bal_in_account_currency))
-						if flt(acc.bal_in_account_currency) < 0
-						else 0,
-						"credit": abs(flt(acc.bal_in_company_currency))
-						if flt(acc.bal_in_company_currency) < 0
-						else 0,
-					},
-					item=acc,
-				)
-
-				self.update_default_dimensions(gl_entry)
-
-				gl_entries.append(gl_entry)
-
-		return gl_entries
-
-	def update_default_dimensions(self, gl_entry):
+	def update_default_dimensions(self, gl_entry, acc):
 		if not self.accounting_dimensions:
 			self.accounting_dimensions = get_accounting_dimensions()
 
-		_, default_dimensions = get_dimensions()
 		for dimension in self.accounting_dimensions:
-			gl_entry.update({dimension: default_dimensions.get(self.company, {}).get(dimension)})
+			gl_entry.update({dimension: acc.get(dimension)})
 
-	def get_pl_balances(self):
+	def get_pl_balances_based_on_dimensions(self, group_by_account=False):
 		"""Get balance for dimension-wise pl accounts"""
 
 		dimension_fields = ["t1.cost_center", "t1.finance_book"]
-
+		
 		self.accounting_dimensions = get_accounting_dimensions()
 		for dimension in self.accounting_dimensions:
 			dimension_fields.append("t1.{0}".format(dimension))
 
-		return frappe.db.sql(
-			"""
+		if group_by_account:
+			dimension_fields.append("t1.account")
+
+		return frappe.db.sql("""
 			select
-				t1.account, t2.account_currency, {dimension_fields},
+				t2.account_currency,
+				{dimension_fields},
 				sum(t1.debit_in_account_currency) - sum(t1.credit_in_account_currency) as bal_in_account_currency,
 				sum(t1.debit) - sum(t1.credit) as bal_in_company_currency
 			from `tabGL Entry` t1, `tabAccount` t2
-			where t1.is_cancelled = 0 and t1.account = t2.name and t2.report_type = 'Profit and Loss'
-			and t2.docstatus < 2 and t2.company = %s
-			and t1.posting_date between %s and %s
-			group by t1.account, {dimension_fields}
+			where
+				t1.is_cancelled = 0
+				and t1.account = t2.name
+				and t2.report_type = 'Profit and Loss'
+				and t2.docstatus < 2
+				and t2.company = %s
+				and t1.posting_date between %s and %s
+			group by {dimension_fields}
 		""".format(
 				dimension_fields=", ".join(dimension_fields)
 			),
 			(self.company, self.get("year_start_date"), self.posting_date),
 			as_dict=1,
 		)
+
+def process_gl_entries(gl_entries):
+	from erpnext.accounts.general_ledger import make_gl_entries
+	try:
+		make_gl_entries(gl_entries, merge_entries=False)
+		frappe.db.set_value("Period Closing Voucher", gl_entries[0].get("voucher_no"), "status", "Completed")
+	except Exception as e:
+		frappe.db.rollback()
+		frappe.log_error(e)
+		frappe.db.set_value("Period Closing Voucher", gl_entries[0].get("voucher_no"), "status", "Failed")
+
+def make_reverse_gl_entries(voucher_type, voucher_no):
+	from erpnext.accounts.general_ledger import make_reverse_gl_entries
+	try:
+		make_reverse_gl_entries(voucher_type=voucher_type, voucher_no=voucher_no)
+		frappe.db.set_value("Period Closing Voucher", voucher_no, "status", "Completed")
+	except Exception as e:
+		frappe.db.rollback()
+		frappe.log_error(e)
+		frappe.db.set_value("Period Closing Voucher", gl_entries[0].get("voucher_no"), "status", "Failed")
\ No newline at end of file
diff --git a/erpnext/accounts/doctype/period_closing_voucher/test_period_closing_voucher.py b/erpnext/accounts/doctype/period_closing_voucher/test_period_closing_voucher.py
index 3b938ea..1fb003f 100644
--- a/erpnext/accounts/doctype/period_closing_voucher/test_period_closing_voucher.py
+++ b/erpnext/accounts/doctype/period_closing_voucher/test_period_closing_voucher.py
@@ -49,7 +49,7 @@
 
 		expected_gle = (
 			("Cost of Goods Sold - TPC", 0.0, 600.0),
-			(surplus_account, 600.0, 400.0),
+			(surplus_account, 200.0, 0.0),
 			("Sales - TPC", 400.0, 0.0),
 		)
 
@@ -59,7 +59,6 @@
 		""",
 			(pcv.name),
 		)
-
 		self.assertEqual(pcv_gle, expected_gle)
 
 	def test_cost_center_wise_posting(self):
diff --git a/erpnext/accounts/general_ledger.py b/erpnext/accounts/general_ledger.py
index 76ef3ab..eed8717 100644
--- a/erpnext/accounts/general_ledger.py
+++ b/erpnext/accounts/general_ledger.py
@@ -168,6 +168,7 @@
 def merge_similar_entries(gl_map, precision=None):
 	merged_gl_map = []
 	accounting_dimensions = get_accounting_dimensions()
+	
 	for entry in gl_map:
 		# if there is already an entry in this account then just add it
 		# to that entry
@@ -290,7 +291,6 @@
 	for entry in gl_map:
 		make_entry(entry, adv_adj, update_outstanding, from_repost)
 
-
 def make_entry(args, adv_adj, update_outstanding, from_repost=False):
 	gle = frappe.new_doc("GL Entry")
 	gle.update(args)
@@ -298,9 +298,10 @@
 	gle.flags.from_repost = from_repost
 	gle.flags.adv_adj = adv_adj
 	gle.flags.update_outstanding = update_outstanding or "Yes"
+	gle.flags.notify_update = False
 	gle.submit()
 
-	if not from_repost:
+	if not from_repost and gle.voucher_type != "Period Closing Voucher":
 		validate_expense_against_budget(args)