from odoo import api, fields, models


class FlIncomeWithholding(models.Model):
    """
    FL 61.1301 — Income Deduction (Withholding) Order.

    MANDATORY after every child support or alimony order unless:
      - Good cause shown, OR
      - Written agreement between parties for alternative payment method.

    All payments route through Florida State Disbursement Unit (SDU).
    Employer receives copy and deducts from obligor's paycheck.
    """
    _name = 'fl.income.withholding'
    _description = 'Income Withholding Order (FL 61.1301)'
    _inherit = ['mail.thread']
    _order = 'issued_date desc'

    case_id = fields.Many2one(
        'fl.case', string='Case',
        ondelete='cascade', index=True
    )
    name = fields.Char(
        string='Reference',
        compute='_compute_name', store=True
    )

    # ── Parties ────────────────────────────────────────────────────────────

    obligor_id = fields.Many2one(
        'res.partner',
        string='Obligor (Person Paying)',
        required=True
    )
    obligee_id = fields.Many2one(
        'res.partner',
        string='Obligee (Person Receiving)',
        required=True
    )
    employer_id = fields.Many2one(
        'res.partner',
        string="Obligor's Employer",
        help='Employer who will receive and execute the withholding order'
    )
    employer_contact = fields.Char(
        string='Employer HR / Payroll Contact'
    )

    # ── Amounts ────────────────────────────────────────────────────────────

    monthly_support_amount = fields.Float(
        string='Monthly Support Amount ($)',
        required=True,
        tracking=True
    )
    arrears_amount = fields.Float(
        string='Arrears Amount ($)',
        help='Total unpaid support owed prior to this order'
    )
    arrears_monthly_payment = fields.Float(
        string='Monthly Arrears Payment ($)',
        help='Additional monthly amount toward arrears payoff'
    )
    total_monthly_withholding = fields.Float(
        string='Total Monthly Withholding ($)',
        compute='_compute_total', store=True,
        help='Support + arrears payment per month'
    )

    # ── Florida State Disbursement Unit ────────────────────────────────────
    # ALL payments must go through FL SDU — never directly to the other party

    fl_sdu_case_number = fields.Char(
        string='FL SDU Case Number',
        help='Florida State Disbursement Unit case number. '
             'Obtain from DOR: https://www.floridarevenue.com/childsupport'
    )
    fl_sdu_address = fields.Char(
        string='FL SDU Payment Address',
        default='Florida State Disbursement Unit, PO Box 8500, Tallahassee, FL 32314-8500',
        readonly=True
    )
    fl_sdu_website = fields.Char(
        default='https://www.floridarevenue.com/childsupport',
        readonly=True
    )

    # ── Dates & Status ────────────────────────────────────────────────────

    issued_date = fields.Date(
        string='Order Issued Date',
        tracking=True
    )
    served_on_employer_date = fields.Date(
        string='Served on Employer Date'
    )
    first_withholding_date = fields.Date(
        string='First Withholding Payroll Date',
        help='Date of first paycheck with withholding applied'
    )

    state = fields.Selection([
        ('draft', 'Draft'),
        ('issued', 'Issued by Court'),
        ('served', 'Served on Employer'),
        ('active', 'Active — Withholding'),
        ('modified', 'Modified'),
        ('terminated', 'Terminated'),
    ], string='Status', default='draft', tracking=True)

    # ── Exceptions (rare) ─────────────────────────────────────────────────

    good_cause_exception = fields.Boolean(
        string='Good Cause Exception',
        help='FL 61.1301(1)(a): Court may waive withholding for good cause shown. '
             'Must be documented in court order. RARE.'
    )
    written_agreement = fields.Boolean(
        string='Written Agreement Between Parties',
        help='Parties may agree in writing to an alternative payment method. '
             'Agreement must be filed with the court.'
    )
    exception_reason = fields.Text(
        string='Exception Reason / Agreement Details'
    )

    # ── Notes ─────────────────────────────────────────────────────────────

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

    # ── Computed ──────────────────────────────────────────────────────────

    @api.depends('case_id', 'issued_date')
    def _compute_name(self):
        for rec in self:
            case_ref = rec.case_id.name if rec.case_id else 'NEW'
            date_str = str(rec.issued_date) if rec.issued_date else 'Draft'
            rec.name = f'IWO — {case_ref} — {date_str}'

    @api.depends('monthly_support_amount', 'arrears_monthly_payment')
    def _compute_total(self):
        for rec in self:
            rec.total_monthly_withholding = (
                (rec.monthly_support_amount or 0.0)
                + (rec.arrears_monthly_payment or 0.0)
            )

    # ── State Actions ─────────────────────────────────────────────────────

    def action_issue(self):
        self.state = 'issued'
        self.issued_date = self.issued_date or fields.Date.today()

    def action_serve(self):
        self.state = 'served'
        self.served_on_employer_date = (
            self.served_on_employer_date or fields.Date.today()
        )

    def action_activate(self):
        self.state = 'active'

    def action_terminate(self):
        self.state = 'terminated'