from odoo import api, fields, models
from dateutil.relativedelta import relativedelta


class FlDiscovery(models.Model):
    """
    Phase 3 — Full implementation.
    Phase 1: Stub with core fields.

    Covers all FL discovery methods:
      - Interrogatories (FL 1.340) — 30 days to respond
      - Request for Production (FL 1.350) — 30 days to respond
      - Request for Admissions (FL 1.370) — 30 days to respond
      - Subpoena — third party documents (FL 1.351)
      - Depositions — tracked in fl.deposition
    """
    _name = 'fl.discovery'
    _description = 'Discovery Item'
    _inherit = ['mail.thread']
    _order = 'served_date asc'

    case_id = fields.Many2one(
        'fl.case', required=True, ondelete='cascade', index=True
    )
    discovery_type = fields.Selection([
        ('interrogatories', 'Interrogatories (FL 1.340)'),
        ('production', 'Request for Production (FL 1.350)'),
        ('admissions', 'Request for Admissions (FL 1.370)'),
        ('subpoena', 'Subpoena — Third Party (FL 1.351)'),
        ('deposition', 'Deposition (FL 1.310)'),
    ], string='Discovery Type', required=True)
    directed_to = fields.Selection([
        ('petitioner', 'Petitioner'),
        ('respondent', 'Respondent'),
        ('third_party', 'Third Party'),
    ], string='Directed To', required=True)
    third_party_id = fields.Many2one(
        'res.partner', string='Third Party'
    )
    description = fields.Char(string='Description / Subject')
    served_date = fields.Date(string='Served Date')
    response_due_date = fields.Date(
        string='Response Due Date',
        compute='_compute_response_due', store=True,
        help='FL 1.340/1.350/1.370: 30 days to respond'
    )
    response_received_date = fields.Date(string='Response Received Date')
    response_complete = fields.Boolean(string='Response Complete')
    objections_raised = fields.Boolean(string='Objections Raised')
    objection_detail = fields.Text(string='Objection Details')
    deficiency_notice_sent = fields.Boolean(string='Deficiency Notice Sent')
    state = fields.Selection([
        ('draft', 'Drafting'),
        ('served', 'Served'),
        ('responded', 'Response Received'),
        ('deficient', 'Response Deficient'),
        ('compelled', 'Motion to Compel Filed'),
        ('complete', 'Complete'),
    ], string='Status', default='draft', tracking=True)
    notes = fields.Text(string='Notes')

    @api.depends('served_date', 'discovery_type')
    def _compute_response_due(self):
        for rec in self:
            if rec.served_date and rec.discovery_type != 'deposition':
                rec.response_due_date = (
                    rec.served_date + relativedelta(days=30)
                )
            else:
                rec.response_due_date = False