from odoo import api, fields, models, _
from odoo.exceptions import ValidationError


class EmployeePIP(models.Model):
    _name = 'employee.pip'
    _description = 'Performance Improvement Plan'
    _inherit = ['mail.thread', 'mail.activity.mixin']
    _rec_name = 'employee_id'

    name = fields.Char(string="PIP Reference",default=lambda self: _('New'),readonly=True )
    employee_id = fields.Many2one( 'hr.employee',required=True)
    manager_id = fields.Many2one('hr.employee',string="Manager")
    appraisal_id = fields.Many2one('employee.appraisal.template.config',string="Appraisal")
    objective = fields.Text(string="Improvement Objective",required=True)
    timeline = fields.Selection([
        ('30', '30 Days'),
        ('60', '60 Days'),
        ('90', '90 Days')
    ], default='30', required=True)
    start_date = fields.Date(default=fields.Date.today)
    end_date = fields.Date()
    review_date = fields.Date()
    employee_acknowledged = fields.Boolean(string="Employee Acknowledged")
    state = fields.Selection([
        ('draft', 'Draft'),
        ('running', 'In Progress'),
        ('review', 'Under Review'),
        ('completed', 'Completed'),
        ('failed', 'Failed')
    ], default='draft', tracking=True)
    task_ids = fields.One2many('employee.pip.task','pip_id',string='Improvement Tasks')
    progress_percentage = fields.Float(compute='_compute_progress',store=True)
    remarks = fields.Text()

    @api.depends('task_ids.state')
    def _compute_progress(self):
        for rec in self:

            total = len(rec.task_ids)

            completed = len(
                rec.task_ids.filtered(
                    lambda l: l.state == 'done'
                )
            )

            rec.progress_percentage = (
                (completed / total) * 100
            ) if total else 0

    @api.onchange('timeline', 'start_date')
    def _onchange_timeline(self):
        for rec in self:
            if rec.start_date and rec.timeline:
                rec.end_date = fields.Date.add(
                    rec.start_date,
                    days=int(rec.timeline)
                )

    def action_start(self):
        self.state = 'running'

    def action_review(self):
        self.state = 'review'

    def action_complete(self):
        self.state = 'completed'

    def action_fail(self):
        self.state = 'failed'




class EmployeePIPTask(models.Model):
    _name = 'employee.pip.task'
    _description = 'PIP Task'

    pip_id = fields.Many2one('employee.pip',ondelete='cascade')
    name = fields.Char(required=True)
    description = fields.Text()
    target_date = fields.Date()
    training_course = fields.Char(string="Suggested Training")
    state = fields.Selection([
        ('pending', 'Pending'),
        ('progress', 'In Progress'),
        ('done', 'Completed')
    ], default='pending')