# -*- coding: utf-8 -*-

import logging
import secrets

from odoo import api, fields, models

_logger = logging.getLogger(__name__)


class CalendarEvent(models.Model):
    _inherit = 'calendar.event'

    x_fc_source_account_id = fields.Many2one(
        'fusion.calendar.account', string='Source Calendar Account',
        help='The external calendar account that originally synced this event.',
    )
    x_fc_is_external = fields.Boolean(
        string='External Event', compute='_compute_is_external', store=True,
    )
    x_fc_link_ids = fields.One2many(
        'fusion.calendar.event.link', 'x_fc_event_id', string='External Links',
    )
    x_fc_manage_token = fields.Char(
        string='Manage Token', index=True, copy=False,
        help='Random token allowing public visitors to manage their booking.',
    )
    x_fc_client_email = fields.Char(string='Client Email')
    x_fc_client_phone = fields.Char(string='Client Phone')
    x_fc_address_lat = fields.Float(string='Location Latitude', digits=(10, 7))
    x_fc_address_lng = fields.Float(string='Location Longitude', digits=(10, 7))
    x_fc_travel_minutes_before = fields.Integer(
        string='Travel Time Before (min)',
        help='Estimated travel time to reach this appointment from the previous one.',
    )
    x_fc_is_travel_block = fields.Boolean(
        string='Travel Block',
        help='Auto-generated travel time placeholder event.',
    )

    @api.depends('x_fc_source_account_id')
    def _compute_is_external(self):
        for event in self:
            event.x_fc_is_external = bool(event.x_fc_source_account_id)

    def _skip_fc_sync(self):
        """Check if Fusion Schedule should skip syncing (native Odoo sync active)."""
        ctx = self.env.context
        return ctx.get('no_calendar_sync') or ctx.get('dont_notify')

    def unlink(self):
        """On delete, also remove from all linked external calendars."""
        if not self._skip_fc_sync():
            for event in self:
                if not event.x_fc_link_ids:
                    continue
                for link in event.x_fc_link_ids:
                    account = link.x_fc_account_id
                    if not account.x_fc_active or not account.sudo().x_fc_rtoken:
                        continue
                    try:
                        token = account._get_valid_token()
                        if not token:
                            continue
                        if account.x_fc_provider == 'google':
                            account._google_delete_event(link.x_fc_external_id, token)
                        elif account.x_fc_provider == 'microsoft':
                            account._microsoft_delete_event(link.x_fc_external_id, token)
                    except Exception as e:
                        _logger.warning(
                            "Failed to delete external event %s from account %s: %s",
                            link.x_fc_external_id, account.id, e,
                        )
        return super().unlink()

    def write(self, vals):
        """On update, push changes to all linked external calendars."""
        res = super().write(vals)
        if self._skip_fc_sync():
            return res

        sync_fields = {'name', 'description', 'location', 'start', 'stop', 'allday',
                       'start_date', 'stop_date', 'privacy', 'show_as', 'active'}
        if not sync_fields.intersection(vals.keys()):
            return res

        for event in self:
            if not event.x_fc_link_ids:
                continue
            for link in event.x_fc_link_ids:
                account = link.x_fc_account_id
                if not account.x_fc_active or account.x_fc_sync_status != 'active':
                    continue
                try:
                    account._sync_push_event(event)
                except Exception as e:
                    _logger.warning(
                        "Failed to push event update %s to account %s: %s",
                        event.id, account.id, e,
                    )
        return res