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

from base64 import b64decode, b64encode
from datetime import datetime
from re import sub as regex_sub

from lxml import etree
from odoo import _, api, fields, models
from odoo.addons.l10n_es_edi_tbai.models.l10n_es_edi_tbai_agencies import get_key
from odoo.exceptions import UserError

L10N_ES_TBAI_CRC8_TABLE = [
    0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15, 0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
    0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65, 0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
    0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5, 0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
    0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85, 0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
    0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2, 0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
    0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2, 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
    0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32, 0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
    0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42, 0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
    0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C, 0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
    0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC, 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
    0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C, 0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
    0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C, 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
    0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B, 0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
    0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B, 0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
    0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB, 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
    0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB, 0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
]

class AccountMove(models.Model):
    _inherit = 'account.move'

    # Stored fields
    l10n_es_tbai_chain_index = fields.Integer(
        string="TicketBAI chain index",
        help="Invoice index in chain, set if and only if an in-chain XML was submitted and did not error",
        copy=False, readonly=True,
    )

    # Stored XML Binaries
    l10n_es_tbai_post_xml = fields.Binary(
        attachment=True, readonly=True, copy=False,
        string="Submission XML",
        help="Submission XML sent to TicketBAI. Kept if accepted or no response (timeout), cleared otherwise.",
    )
    l10n_es_tbai_cancel_xml = fields.Binary(
        attachment=True, readonly=True, copy=False,
        string="Cancellation XML",
        help="Cancellation XML sent to TicketBAI. Kept if accepted or no response (timeout), cleared otherwise.",
    )

    # Non-stored fields
    l10n_es_tbai_is_required = fields.Boolean(
        string="TicketBAI required",
        help="Is the Basque EDI (TicketBAI) needed ?",
        compute="_compute_l10n_es_tbai_is_required",
    )

    # Optional fields
    l10n_es_tbai_refund_reason = fields.Selection(
        selection=[
            ('R1', "R1: Art. 80.1, 80.2, 80.6 and rights founded error"),
            ('R2', "R2: Art. 80.3"),
            ('R3', "R3: Art. 80.4"),
            ('R4', "R4: Art. 80 - other"),
            ('R5', "R5: Factura rectificativa en facturas simplificadas"),
        ],
        string="Invoice Refund Reason Code (TicketBai)",
        help="BOE-A-1992-28740. Ley 37/1992, de 28 de diciembre, del Impuesto sobre el "
        "Valor Añadido. Artículo 80. Modificación de la base imponible.",
        copy=False,
    )

    # -------------------------------------------------------------------------
    # API-DECORATED & EXTENDED METHODS
    # -------------------------------------------------------------------------

    @api.depends('move_type', 'company_id')
    def _compute_l10n_es_tbai_is_required(self):
        for move in self:
            move.l10n_es_tbai_is_required = move.is_sale_document() \
                and move.country_code == 'ES' \
                and move.company_id.l10n_es_tbai_tax_agency

    @api.depends('state', 'edi_document_ids.state')
    def _compute_show_reset_to_draft_button(self):
        # EXTENDS account_edi account.move
        super()._compute_show_reset_to_draft_button()

        for move in self:
            if move.l10n_es_tbai_chain_index:
                move.show_reset_to_draft_button = False

    def button_draft(self):
        # EXTENDS account account.move
        for move in self:
            if move.l10n_es_tbai_chain_index and not move.edi_state == 'cancelled':
                # NOTE this last condition (state is cancelled) is there because
                # _postprocess_cancel_edi_results calls button_draft before
                # calling button_cancel. Draft button does not appear for user.
                raise UserError(_("You cannot reset to draft an entry that has been posted to TicketBAI's chain"))
        super().button_draft()

    @api.ondelete(at_uninstall=False)
    def _l10n_es_tbai_unlink_except_in_chain(self):
        # Prevent deleting moves that are part of the TicketBAI chain
        if not self._context.get('force_delete') and any(m.l10n_es_tbai_chain_index for m in self):
            raise UserError(_('You cannot delete a move that has a TicketBAI chain id.'))

    # -------------------------------------------------------------------------
    # HELPER METHODS
    # -------------------------------------------------------------------------

    def _l10n_es_tbai_is_in_chain(self):
        """
        True iff invoice has been posted to the chain and confirmed by govt.
        Note that cancelled invoices remain part of the chain.
        """
        tbai_doc_ids = self.edi_document_ids.filtered(lambda d: d.edi_format_id.code == 'es_tbai')
        return self.l10n_es_tbai_is_required \
            and len(tbai_doc_ids) > 0 \
            and not any(tbai_doc_ids.filtered(lambda d: d.state == 'to_send'))

    def _get_l10n_es_tbai_sequence_and_number(self):
        """Get the TicketBAI sequence a number values for this invoice."""
        self.ensure_one()
        sequence, number = self.name.rsplit('/', 1)  # NOTE non-decimal characters should not appear in the number
        sequence = regex_sub(r"[^0-9A-Za-z.\_\-\/]", "", sequence)  # remove forbidden characters
        sequence = regex_sub(r"\s+", " ", sequence)  # no more than one consecutive whitespace allowed
        # NOTE (optional) not recommended to use chars out of ([0123456789ABCDEFGHJKLMNPQRSTUVXYZ.\_\-\/ ])
        sequence += "TEST" if self.company_id.l10n_es_edi_test_env else ""
        return sequence, number

    def _get_l10n_es_tbai_signature_and_date(self):
        """
        Get the TicketBAI signature and registration date for this invoice.
        Values are read directly from the 'post' XMLs submitted to the government \
            (the 'cancel' XML is ignored).
        The registration date is the date the invoice was registered into the govt's TicketBAI servers.
        """
        self.ensure_one()
        vals = self._get_l10n_es_tbai_values_from_xml({
            'signature': r'.//{http://www.w3.org/2000/09/xmldsig#}SignatureValue',
            'registration_date': r'.//CabeceraFactura//FechaExpedicionFactura'
        })
        # RFC2045 - Base64 Content-Transfer-Encoding (page 25)
        # Any characters outside of the base64 alphabet are to be ignored in base64-encoded data.
        signature = vals['signature'].replace("\n", "")
        registration_date = datetime.strptime(vals['registration_date'], '%d-%m-%Y')
        return signature, registration_date

    def _get_l10n_es_tbai_id(self):
        """Get the TicketBAI ID (TBAID) as defined in the TicketBAI doc."""
        self.ensure_one()
        signature, registration_date = self._get_l10n_es_tbai_signature_and_date()
        company = self.company_id
        tbai_id_no_crc = '-'.join([
            'TBAI',
            str(company.vat[2:] if company.vat.startswith('ES') else company.vat),
            datetime.strftime(registration_date, '%d%m%y'),
            signature[:13],
            ''  # CRC
        ])
        return tbai_id_no_crc + self._l10n_es_edi_tbai_crc8(tbai_id_no_crc)

    def _get_l10n_es_tbai_qr(self):
        """Returns the URL for the invoice's QR code.  We can not use url_encode because it escapes / e.g."""
        self.ensure_one()
        if not self._l10n_es_tbai_is_in_chain():
            return ''

        company = self.company_id
        sequence, number = self._get_l10n_es_tbai_sequence_and_number()
        tbai_qr_no_crc = get_key(company.l10n_es_tbai_tax_agency, 'qr_url_', company.l10n_es_edi_test_env) + '?' + '&'.join([
            'id=' + self._get_l10n_es_tbai_id(),
            's=' + sequence,
            'nf=' + number,
            'i=' + self._get_l10n_es_tbai_values_from_xml({'importe': r'.//ImporteTotalFactura'})['importe']
        ])
        qr_url = tbai_qr_no_crc + '&cr=' + self._l10n_es_edi_tbai_crc8(tbai_qr_no_crc)
        return qr_url

    def _l10n_es_edi_tbai_crc8(self, data):
        crc = 0x0
        for c in data:
            crc = L10N_ES_TBAI_CRC8_TABLE[(crc ^ ord(c)) & 0xFF]
        return '{:03d}'.format(crc & 0xFF)

    def _get_l10n_es_tbai_values_from_xml(self, xpaths):
        """
        This function reads values directly from the 'post' XML submitted to the government \
            (the 'cancel' XML is ignored).
        """
        res = dict.fromkeys(xpaths, '')
        doc_xml = self._get_l10n_es_tbai_submitted_xml()
        if doc_xml is None:
            return res
        for key, value in xpaths.items():
            res[key] = doc_xml.find(value).text
        return res

    def _get_l10n_es_tbai_submitted_xml(self, cancel=False):
        """Returns the XML object representing the post or cancel document."""
        self.ensure_one()
        self = self.with_context(bin_size=False)
        doc = self.l10n_es_tbai_cancel_xml if cancel else self.l10n_es_tbai_post_xml
        if not doc:
            return None
        return etree.fromstring(b64decode(doc))

    def _update_l10n_es_tbai_submitted_xml(self, xml_doc, cancel):
        """Updates the binary data of the post or cancel document, from its XML object."""
        self.ensure_one()
        b64_doc = b'' if xml_doc is None else b64encode(etree.tostring(xml_doc, encoding='UTF-8'))
        if cancel:
            self.l10n_es_tbai_cancel_xml = b64_doc
        else:
            self.l10n_es_tbai_post_xml = b64_doc

    def _is_l10n_es_tbai_simplified(self):
        return self.commercial_partner_id == self.env.ref("l10n_es_edi_sii.partner_simplified")
