# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.

import calendar

from datetime import datetime, timedelta
from dateutil.relativedelta import relativedelta
from odoo import api, fields, models, _
from odoo.exceptions import UserError


class HrHolidaySummaryReport(models.AbstractModel):
    _name = 'report.hr_holidays_community.report_holidayssummary'
    _description = "Holiday Summary Report"

    def _get_header_info(self, start_date, holiday_type):
        if isinstance(start_date, str):
            st_date = datetime.fromisoformat(start_date).date()
        else:
            st_date = start_date
        return {
            'start_date': st_date.isoformat(),
            'end_date': (st_date + relativedelta(days=59)).isoformat(),
            'holiday_type': 'Confirmed and Approved' if holiday_type == 'both' else holiday_type
        }

    def _date_is_day_off(self, date):
        return date.weekday() in (calendar.SATURDAY, calendar.SUNDAY,)

    def _get_day(self, start_date):
        res = []
        if isinstance(start_date, str):
            start_date = datetime.fromisoformat(start_date).date()
        for x in range(0, 60):
            color = '#ababab' if self._date_is_day_off(start_date) else ''
            res.append({'day_str': start_date.strftime('%a'), 'day': start_date.day, 'color': color})
            start_date = start_date + relativedelta(days=1)
        return res

    def _get_months(self, start_date):
        # it works for geting month name between two dates.
        res = []
        if isinstance(start_date, str):
            start_date = datetime.fromisoformat(start_date).date()
        end_date = start_date + relativedelta(days=59)
        while start_date <= end_date:
            last_date = start_date + relativedelta(day=1, months=+1, days=-1)
            if last_date > end_date:
                last_date = end_date
            month_days = (last_date - start_date).days + 1
            res.append({'month_name': start_date.strftime('%B'), 'days': month_days})
            start_date += relativedelta(day=1, months=+1)
        return res

    def _get_leaves_summary(self, start_date, empid, holiday_type):
        res = []
        count = 0
        if isinstance(start_date, str):
            start_date = datetime.fromisoformat(start_date).date()
        end_date = start_date + relativedelta(days=59)
        for index in range(0, 60):
            current = start_date + timedelta(index)
            res.append({'day': current.day, 'color': ''})
            if self._date_is_day_off(current):
                res[index]['color'] = '#ababab'
        # count and get leave summary details.
        holiday_type = ['confirm', 'validate'] if holiday_type == 'both' else [
            'confirm'] if holiday_type == 'Confirmed' else ['validate']
        holidays = self.env['hr.holidays'].search([
            ('employee_id', '=', empid), ('state', 'in', holiday_type),
            ('type', '=', 'remove'), ('date_from', '<=', str(end_date)),
            ('date_to', '>=', str(start_date))
        ])
        for holiday in holidays:
            # Convert date to user timezone, otherwise the report will not be consistent with the
            # value displayed in the interface.
            date_from = holiday.date_from
            if isinstance(date_from, str):
                date_from = datetime.fromisoformat(date_from.replace('Z', '+00:00'))
            # Convert to user timezone
            date_from = fields.Datetime.context_timestamp(holiday, date_from).date()

            date_to = holiday.date_to
            if isinstance(date_to, str):
                date_to = datetime.fromisoformat(date_to.replace('Z', '+00:00'))
            date_to = fields.Datetime.context_timestamp(holiday, date_to).date()

            for index in range(0, ((date_to - date_from).days + 1)):
                if date_from >= start_date and date_from <= end_date:
                    res[(date_from - start_date).days]['color'] = holiday.holiday_status_id.color_name
                date_from += timedelta(1)
            count += abs(holiday.number_of_days)
        self.sum = count
        return res

    def _get_data_from_report(self, data):
        res = []
        Employee = self.env['hr.employee']
        if 'depts' in data:
            for department in self.env['hr.department'].browse(data['depts']):
                res.append({'dept': department.name, 'data': [], 'color': self._get_day(data['date_from'])})
                for emp in Employee.search([('department_id', '=', department.id)]):
                    res[len(res) - 1]['data'].append({
                        'emp': emp.name,
                        'display': self._get_leaves_summary(data['date_from'], emp.id, data['holiday_type']),
                        'sum': self.sum
                    })
        elif 'emp' in data:
            res.append({'data': []})
            for emp in Employee.browse(data['emp']):
                res[0]['data'].append({
                    'emp': emp.name,
                    'display': self._get_leaves_summary(data['date_from'], emp.id, data['holiday_type']),
                    'sum': self.sum
                })
        return res

    def _get_holidays_status(self):
        res = []
        for holiday in self.env['hr.holidays.status'].search([]):
            res.append({'color': holiday.color_name, 'name': holiday.name})
        return res

    @api.model
    def _get_report_values(self, docids, data=None):
        if not data.get('form'):
            raise UserError(_("Form content is missing, this report cannot be printed."))

        holidays_report = self.env['ir.actions.report']._get_report_from_name(
            'hr_holidays_community.report_holidayssummary')
        holidays = self.env['hr.holidays'].browse(self.ids)
        return {
            'doc_ids': self.ids,
            'doc_model': holidays_report.model,
            'docs': holidays,
            'get_header_info': self._get_header_info(data['form']['date_from'], data['form']['holiday_type']),
            'get_day': self._get_day(data['form']['date_from']),
            'get_months': self._get_months(data['form']['date_from']),
            'get_data_from_report': self._get_data_from_report(data['form']),
            'get_holidays_status': self._get_holidays_status(),
        }
