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

from __future__ import unicode_literals
import frappe
from frappe import _

def execute(filters=None):
	columns = get_columns()
	data = []

	data = frappe.db.get_all("Project", filters=filters, fields=["name", 'status', "percent_complete", "expected_start_date", "expected_end_date", "project_type"], order_by="expected_end_date")

	for project in data:
		project["total_tasks"] = frappe.db.count("Task", filters={"project": project.name})
		project["completed_tasks"] = frappe.db.count("Task", filters={"project": project.name, "status": "Completed"})
		project["overdue_tasks"] = frappe.db.count("Task", filters={"project": project.name, "status": "Overdue"})

	chart = get_chart_data(data)
	report_summary = get_report_summary(data)

	return columns, data, None, chart, report_summary

def get_columns():
	return [
		{
			"fieldname": "name",
			"label": _("Project"),
			"fieldtype": "Link",
			"options": "Project",
			"width": 200
		},
		{
			"fieldname": "project_type",
			"label": _("Type"),
			"fieldtype": "Link",
			"options": "Project Type",
			"width": 120
		},
		{
			"fieldname": "status",
			"label": _("Status"),
			"fieldtype": "Data",
			"width": 120
		},
		{
			"fieldname": "total_tasks",
			"label": _("Total Tasks"),
			"fieldtype": "Data",
			"width": 120
		},
		{
			"fieldname": "completed_tasks",
			"label": _("Tasks Completed"),
			"fieldtype": "Data",
			"width": 120
		},
		{
			"fieldname": "overdue_tasks",
			"label": _("Tasks Overdue"),
			"fieldtype": "Data",
			"width": 120
		},
		{
			"fieldname": "percent_complete",
			"label": _("Completion"),
			"fieldtype": "Data",
			"width": 120
		},
		{
			"fieldname": "expected_start_date",
			"label": _("Start Date"),
			"fieldtype": "Date",
			"width": 120
		},
		{
			"fieldname": "expected_end_date",
			"label": _("End Date"),
			"fieldtype": "Date",
			"width": 120
		},
	]

def get_chart_data(data):
	labels = []
	total = []
	completed = []
	overdue = []

	for project in data:
		labels.append(project.name)
		total.append(project.total_tasks)
		completed.append(project.completed_tasks)
		overdue.append(project.overdue_tasks)

	return {
		"data": {
			'labels': labels[:30],
			'datasets': [
				{
					"name": "Overdue",
					"values": overdue[:30]
				},
				{
					"name": "Completed",
					"values": completed[:30]
				},
				{
					"name": "Total Tasks",
					"values": total[:30]
				},
			]
		},
		"type": "bar",
		"colors": ["#fc4f51", "#78d6ff", "#7575ff"],
		"barOptions": {
			"stacked": True
		}
	}

def get_report_summary(data):
	if not data:
		return None

	avg_completion = sum([project.percent_complete for project in data]) / len(data)
	total = sum([project.total_tasks for project in data])
	total_overdue = sum([project.overdue_tasks for project in data])
	completed = sum([project.completed_tasks for project in data])

	return [
		{
			"value": avg_completion,
			"indicator": "Green" if avg_completion > 50 else "Red",
			"label": "Average Completion",
			"datatype": "Percent",
		},
		{
			"value": total,
			"indicator": "Blue",
			"label": "Total Tasks",
			"datatype": "Int",
		},
		{
			"value": completed,
			"indicator": "Green",
			"label": "Completed Tasks",
			"datatype": "Int",
		},
		{
			"value": total_overdue,
			"indicator": "Green" if total_overdue == 0 else "Red",
			"label": "Overdue Tasks",
			"datatype": "Int",
		}
	]