# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.

from odoo import _, fields, models

import logging
import requests

_logger = logging.getLogger(__name__)


class AddIotBox(models.TransientModel):
    _name = 'add.iot.box'
    _description = 'Add IoT Box wizard'

    # Depending on the stage different window actions are available
    stage = fields.Selection([
        ('start', 'Start'),
        ('connect', 'Connect'),
        ('manual', 'Manual'),
        ('pair_offline', 'Offline Pairing'),
    ], string='Stage', default='start')

    discovered_box_ids = fields.One2many("iot.discovered.box", "add_iot_box_wizard_id")
    iot_box_to_connect = fields.Many2one("iot.discovered.box")
    serial_number = fields.Char(string='Serial Number')
    pairing_code = fields.Char(string='Pairing Code')

    offline_pairing_token = fields.Char(
        "Token", default=lambda self: self._compute_pairing_token(), readonly=True, store=False
    )

    # ------------------------- IOT-PROXY CALLING METHODS -------------------------
    def _connect_iot_box_with_pairing_code(self):
        """Community repackage — the upstream version called out to
        Odoo S.A.'s iot-proxy service at odoo.com to resolve pairing
        codes. That's phone-home for licensed IoT Boxes. In community
        mode we pair directly: the Pi-side iot_drivers proxy registers
        itself with this Odoo server using the shared token, so no
        third-party resolution is needed.

        If a user gets to this wizard path anyway, log + show the
        "no box found" screen. The normal flow is for operators to
        use the direct pairing (or the /fp/iot/ingest endpoint for
        HTTP-only sensors).
        """
        if self.iot_box_to_connect:
            self.pairing_code = self.iot_box_to_connect.pairing_code
            self.serial_number = self.iot_box_to_connect.serial_number
        _logger.info(
            'IoT pairing-code wizard invoked with code=%s, serial=%s — '
            'upstream odoo.com proxy call disabled in community repackage. '
            'Use direct IoT Box registration instead.',
            self.pairing_code, self.serial_number,
        )
        return self._open_no_iot_box_found_action()

    # ------------------------- WIZARD OPEN ACTIONS -------------------------
    def _open_select_box_to_connect_action(self):
        self.stage = 'connect'
        return {
            'type': 'ir.actions.act_window',
            'res_model': 'add.iot.box',
            'res_id': self.id,
            'name': _("Several IoT's detected"),
            'views': [[self.env.ref('iot.view_select_box_to_connect').id, 'form']],
            'target': 'new',
        }

    def _open_enter_pairing_code_action(self):
        self.stage = 'connect'
        return {
            'type': 'ir.actions.act_window',
            'res_model': 'add.iot.box',
            'res_id': self.id,
            'name': _("Searching for an IoT Box..."),
            'views': [[self.env.ref('iot.view_enter_pairing_code').id, 'form']],
            'target': 'new',
        }

    def _open_no_iot_box_found_action(self):
        self.stage = 'manual'
        return {
            'type': 'ir.actions.act_window',
            'res_model': 'add.iot.box',
            'res_id': self.id,
            'name': _("Searching for an IoT Box..."),
            'views': [[self.env.ref('iot.view_no_iot_box_found').id, 'form']],
            'target': 'new',
            'no_iot_found_found': True,
        }

    def _open_connecting_action(self):
        if self.serial_number:
            name = _('IoT Box %s found. Connecting...', self.serial_number)
        else:
            name = _('IoT Box found. Connecting...')

        return {
            'type': 'ir.actions.act_window',
            'res_model': 'add.iot.box',
            'res_id': self.id,
            'name': name,
            'views': [[self.env.ref('iot.view_add_iot_box').id, 'form']],
            'target': 'new',
        }

    def open_documentation_url(self):
        return {
            'type': 'ir.actions.act_url',
            'url': '#',
            'target': 'new',
        }

    # ------------------------- WIZARD STAGE ACTIONS -------------------------

    def _start_stage(self):
        """
        Make a request to discover local IoT Boxes
        If none are found, open the pairing code wizard
        If only 1 is found, attempt to connect it directly
        If > 1 is found, open the select box wizard
        """
        n_detected_iot_boxes = len(self.discovered_box_ids)

        # If multiple IoT Boxes are found, ask the user to select one
        if n_detected_iot_boxes > 1:
            return self._open_select_box_to_connect_action()
        # If only one IoT Box is found, connect it directly without showing the wizard to the user
        elif n_detected_iot_boxes == 1:
            self.pairing_code = self.discovered_box_ids[0].pairing_code
            self.serial_number = self.discovered_box_ids[0].serial_number
            return self._connect_iot_box_with_pairing_code()
        # If no IoT Boxes are found, ask the user to enter the pairing code manually
        else:
            return self._open_no_iot_box_found_action()

    def add_iot_box_wizard_action(self):
        """
        Base action for the wizard used to connect IoT Boxes
        Depending on the stage of the wizard, different actions are available
        """
        match self.stage:
            case 'start':
                return self._start_stage()
            case 'manual':
                return self._open_enter_pairing_code_action()
            case 'connect':
                return self._connect_iot_box_with_pairing_code()
        return None

    def pair_offline(self):
        """Use the token to pair an IoT Box.
        Allows to pair an IoT Box that is not connected to the internet
        """
        if self.stage == 'pair_offline':
            self.stage = 'start'
            return self._start_stage()

        self.stage = 'pair_offline'
        return {
            'type': 'ir.actions.act_window',
            'res_model': 'add.iot.box',
            'res_id': self.id,
            'name': _("Pair an IoT Box offline"),
            'views': [[self.env.ref('iot.view_pair_offline').id, 'form']],
            'target': 'new',
        }

    def _compute_pairing_token(self):
        icp_sudo = self.env['ir.config_parameter'].sudo()
        token = self.env['iot.box']._default_token()
        url = self.get_base_url()
        db_uuid = icp_sudo.get_param('database.uuid', default='')
        db_name = self.env.cr.dbname
        enterprise_code = icp_sudo.get_param('database.enterprise_code', default='')

        return f"{url}?token={token}&db_uuid={db_uuid}&enterprise_code={enterprise_code}&db_name={db_name}"