from odoo import models, fields, api
from odoo.exceptions import UserError


class LaundryCommission(models.Model):
    """Staff commission tracking (PART 3).

    States:
        pending   — auto-created when order progresses; awaiting manager review
        confirmed — manager has verified and approved the commission
        paid      — commission has been settled/paid to the staff member

    The commission_account_id (from settings) is informational for now.
    Managers can bulk-confirm and bulk-mark-paid from the list view.
    """
    _name = 'laundry.commission'
    _description = 'Laundry Staff Commission'
    _inherit = ['mail.thread']
    _order = 'date desc, id desc'

    name = fields.Char(
        string='Reference',
        compute='_compute_name', store=True, readonly=True,
    )
    order_id = fields.Many2one(
        'sale.order', string='Order',
        required=True, ondelete='cascade', index=True,
    )
    company_id = fields.Many2one(
        'res.company',
        related='order_id.company_id', store=True, index=True,
    )
    employee_id = fields.Many2one(
        'res.users', string='Staff Member',
        required=True, domain=[('share', '=', False)],
        tracking=True,
    )
    role = fields.Selection([
        ('reception',  'Reception / Intake'),
        ('processing', 'Processing / Cleaning'),
        ('delivery',   'Delivery / Handover'),
    ], string='Role', required=True, tracking=True)

    commission_type = fields.Selection([
        ('percentage', 'Percentage (%)'),
        ('fixed',      'Fixed Amount'),
    ], string='Type', required=True, default='percentage')

    rate = fields.Float(string='Rate / Amount', digits=(10, 2))
    base_amount = fields.Float(string='Order Total', digits=(10, 2))
    commission_amount = fields.Float(
        string='Commission',
        compute='_compute_commission_amount', store=True, digits=(10, 2),
    )

    date = fields.Date(string='Date', required=True, default=fields.Date.today)

    state = fields.Selection([
        ('pending',   'Pending'),
        ('confirmed', 'Confirmed'),
        ('paid',      'Paid'),
    ], default='pending', required=True, tracking=True, copy=False, index=True)

    notes = fields.Text(string='Notes')

    _ROLE_LABELS = {
        'reception':  'Reception',
        'processing': 'Processing',
        'delivery':   'Delivery',
    }

    @api.depends('order_id', 'order_id.name', 'role')
    def _compute_name(self):
        for rec in self:
            order = rec.order_id.name or 'NEW'
            role  = self._ROLE_LABELS.get(rec.role, rec.role or '')
            rec.name = f'COM/{order}/{role}'

    @api.depends('commission_type', 'rate', 'base_amount')
    def _compute_commission_amount(self):
        for rec in self:
            if rec.commission_type == 'percentage':
                rec.commission_amount = rec.base_amount * rec.rate / 100.0
            else:
                rec.commission_amount = rec.rate

    # ── State transitions ─────────────────────────────────────────────
    def action_confirm(self):
        """Manager confirms commission is valid and approved."""
        for rec in self:
            if rec.state != 'pending':
                raise UserError(
                    f'"{rec.name}" cannot be confirmed — current state: {rec.state}.'
                )
            rec.write({'state': 'confirmed'})
            rec.message_post(
                body=f'Commission confirmed by {self.env.user.name}. '
                     f'Amount: {rec.commission_amount:.2f}'
            )

    def action_mark_paid(self):
        """Mark commission as settled/paid to staff."""
        for rec in self:
            if rec.state == 'paid':
                raise UserError(f'"{rec.name}" is already paid.')
            if rec.state == 'pending':
                # Allow paying directly from pending (manager shortcut)
                rec.write({'state': 'paid'})
            else:
                rec.write({'state': 'paid'})
            rec.message_post(
                body=f'Marked as paid by {self.env.user.name}.'
            )

    def action_reset_pending(self):
        """Reset commission back to pending (manager only)."""
        for rec in self:
            if rec.state == 'paid':
                raise UserError(
                    f'Cannot reset "{rec.name}" — it has already been paid.'
                )
            rec.write({'state': 'pending'})
            rec.message_post(
                body=f'Reset to pending by {self.env.user.name}.'
            )