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

from odoo import api, fields, models
from odoo.tools.sql import drop_view_if_exists, SQL


class HrEfficiencyReport(models.Model):
    _name = "hr.efficiency.report"
    _description = "HR Efficiency Analysis Report"
    _auto = False

    month_year = fields.Char('Month Year', readonly=True)
    employee_id = fields.Many2one('hr.employee', 'Employee', readonly=True)
    company_id = fields.Many2one('res.company', 'Company', readonly=True)
    department_id = fields.Many2one('hr.department', 'Department', readonly=True)
    job_title = fields.Char('Job Title', readonly=True)
    
    # Hours
    available_hours = fields.Float('Available Hours', readonly=True)
    planned_hours = fields.Float('Planned Hours', readonly=True)
    planned_billable_hours = fields.Float('Planned Billable Hours', readonly=True)
    planned_non_billable_hours = fields.Float('Planned Non-Billable Hours', readonly=True)
    actual_billable_hours = fields.Float('Actual Billable Hours', readonly=True)
    actual_non_billable_hours = fields.Float('Actual Non-Billable Hours', readonly=True)
    total_actual_hours = fields.Float('Total Actual Hours', readonly=True)
    
    # Efficiency rates
    efficiency_rate = fields.Float('Efficiency Rate (%)', readonly=True)
    billable_efficiency_rate = fields.Float('Billable Efficiency Rate (%)', readonly=True)
    
    # Computed fields for analysis
    utilization_rate = fields.Float('Utilization Rate (%)', readonly=True, help="Percentage of available hours that were planned")
    billable_utilization_rate = fields.Float('Billable Utilization Rate (%)', readonly=True, help="Percentage of available hours that were planned on billable projects")

    @property
    def _table_query(self):
        return """
            SELECT 
                e.id,
                e.month_year,
                e.employee_id,
                e.company_id,
                emp.department_id,
                emp.job_title,
                e.available_hours,
                e.planned_hours,
                e.planned_billable_hours,
                e.planned_non_billable_hours,
                e.actual_billable_hours,
                e.actual_non_billable_hours,
                e.total_actual_hours,
                e.efficiency_rate,
                e.billable_efficiency_rate,
                CASE 
                    WHEN e.available_hours > 0 THEN (e.planned_hours / e.available_hours) * 100
                    ELSE 0 
                END AS utilization_rate,
                CASE 
                    WHEN e.available_hours > 0 THEN (e.planned_billable_hours / e.available_hours) * 100
                    ELSE 0 
                END AS billable_utilization_rate
            FROM hr_efficiency e
            LEFT JOIN hr_employee emp ON e.employee_id = emp.id
        """

    @api.model
    def read_group(self, domain, fields, groupby, offset=0, limit=None, orderby=False, lazy=True):
        """
        Override read_group to handle computed fields
        """
        res = super().read_group(domain, fields, groupby, offset=offset, limit=limit, orderby=orderby, lazy=lazy)
        
        # Recalculate computed fields for grouped data
        for group in res:
            if '__domain' in group:
                records = self.search(group['__domain'])
                if records:
                    # Calculate averages for efficiency rates
                    if 'efficiency_rate' in fields:
                        group['efficiency_rate'] = sum(r.efficiency_rate for r in records) / len(records)
                    if 'billable_efficiency_rate' in fields:
                        group['billable_efficiency_rate'] = sum(r.billable_efficiency_rate for r in records) / len(records)
                    if 'utilization_rate' in fields:
                        group['utilization_rate'] = sum(r.utilization_rate for r in records) / len(records)
                    if 'billable_utilization_rate' in fields:
                        group['billable_utilization_rate'] = sum(r.billable_utilization_rate for r in records) / len(records)
        
        return res