# Copyright (c) 2013, Frappe Technologies Pvt. Ltd. and contributors
# For license information, please see license.txt


import frappe
from frappe import _


def execute(filters=None):

	if not filters:
		filters = {}
	filters = frappe._dict(filters)

	columns = get_columns()

	data = get_data(filters)

	return columns, data


def get_columns():
	return [
		{
			"label": _("Staffing Plan"),
			"fieldtype": "Link",
			"fieldname": "staffing_plan",
			"options": "Staffing Plan",
			"width": 150,
		},
		{
			"label": _("Job Opening"),
			"fieldtype": "Link",
			"fieldname": "job_opening",
			"options": "Job Opening",
			"width": 105,
		},
		{
			"label": _("Job Applicant"),
			"fieldtype": "Link",
			"fieldname": "job_applicant",
			"options": "Job Applicant",
			"width": 150,
		},
		{"label": _("Applicant name"), "fieldtype": "data", "fieldname": "applicant_name", "width": 130},
		{
			"label": _("Application Status"),
			"fieldtype": "Data",
			"fieldname": "application_status",
			"width": 150,
		},
		{
			"label": _("Job Offer"),
			"fieldtype": "Link",
			"fieldname": "job_offer",
			"options": "job Offer",
			"width": 150,
		},
		{"label": _("Designation"), "fieldtype": "Data", "fieldname": "designation", "width": 100},
		{"label": _("Offer Date"), "fieldtype": "date", "fieldname": "offer_date", "width": 100},
		{
			"label": _("Job Offer status"),
			"fieldtype": "Data",
			"fieldname": "job_offer_status",
			"width": 150,
		},
	]


def get_data(filters):
	data = []
	staffing_plan_details = get_staffing_plan(filters)
	staffing_plan_list = list(set([details["name"] for details in staffing_plan_details]))
	sp_jo_map, jo_list = get_job_opening(staffing_plan_list)
	jo_ja_map, ja_list = get_job_applicant(jo_list)
	ja_joff_map = get_job_offer(ja_list)

	for sp in sp_jo_map.keys():
		parent_row = get_parent_row(sp_jo_map, sp, jo_ja_map, ja_joff_map)
		data += parent_row

	return data


def get_parent_row(sp_jo_map, sp, jo_ja_map, ja_joff_map):
	data = []
	if sp in sp_jo_map.keys():
		for jo in sp_jo_map[sp]:
			row = {
				"staffing_plan": sp,
				"job_opening": jo["name"],
			}
			data.append(row)
			child_row = get_child_row(jo["name"], jo_ja_map, ja_joff_map)
			data += child_row
	return data


def get_child_row(jo, jo_ja_map, ja_joff_map):
	data = []
	if jo in jo_ja_map.keys():
		for ja in jo_ja_map[jo]:
			row = {
				"indent": 1,
				"job_applicant": ja.name,
				"applicant_name": ja.applicant_name,
				"application_status": ja.status,
			}
			if ja.name in ja_joff_map.keys():
				jo_detail = ja_joff_map[ja.name][0]
				row["job_offer"] = jo_detail.name
				row["job_offer_status"] = jo_detail.status
				row["offer_date"] = jo_detail.offer_date.strftime("%d-%m-%Y")
				row["designation"] = jo_detail.designation

			data.append(row)
	return data


def get_staffing_plan(filters):

	staffing_plan = frappe.db.sql(
		"""
	select
		sp.name, sp.department, spd.designation, spd.vacancies, spd.current_count, spd.parent, sp.to_date
	from
		`tabStaffing Plan Detail` spd , `tabStaffing Plan` sp
	where
			spd.parent = sp.name
		And
			sp.to_date > '{0}'
		""".format(
			filters.on_date
		),
		as_dict=1,
	)

	return staffing_plan


def get_job_opening(sp_list):

	job_openings = frappe.get_all(
		"Job Opening", filters=[["staffing_plan", "IN", sp_list]], fields=["name", "staffing_plan"]
	)

	sp_jo_map = {}
	jo_list = []

	for openings in job_openings:
		if openings.staffing_plan not in sp_jo_map.keys():
			sp_jo_map[openings.staffing_plan] = [openings]
		else:
			sp_jo_map[openings.staffing_plan].append(openings)

		jo_list.append(openings.name)

	return sp_jo_map, jo_list


def get_job_applicant(jo_list):

	jo_ja_map = {}
	ja_list = []

	applicants = frappe.get_all(
		"Job Applicant",
		filters=[["job_title", "IN", jo_list]],
		fields=["name", "job_title", "applicant_name", "status"],
	)

	for applicant in applicants:
		if applicant.job_title not in jo_ja_map.keys():
			jo_ja_map[applicant.job_title] = [applicant]
		else:
			jo_ja_map[applicant.job_title].append(applicant)

		ja_list.append(applicant.name)

	return jo_ja_map, ja_list


def get_job_offer(ja_list):
	ja_joff_map = {}

	offers = frappe.get_all(
		"Job Offer",
		filters=[["job_applicant", "IN", ja_list]],
		fields=["name", "job_applicant", "status", "offer_date", "designation"],
	)

	for offer in offers:
		if offer.job_applicant not in ja_joff_map.keys():
			ja_joff_map[offer.job_applicant] = [offer]
		else:
			ja_joff_map[offer.job_applicant].append(offer)

	return ja_joff_map