"""Wizard to create a vendor invoice from a Documents document.

The wizard creates an empty draft ``account.move`` of the chosen
move type, copies the document's binary attachment onto the new
move, posts a chatter note linking back to the source document,
and finally stores the move on ``documents.document.move_id`` so
the source no longer appears as an invoice candidate.
"""

from odoo import _, api, fields, models
from odoo.exceptions import UserError


MOVE_TYPE_LABELS = {
    'in_invoice': _('Vendor Bill'),
    'in_refund': _('Vendor Credit Note'),
}


class CreateInvoiceFromDocumentWizard(models.TransientModel):
    _name = 'fusion.create.invoice.from.document.wizard'
    _description = 'Create Vendor Invoice from Document'

    document_id = fields.Many2one(
        'documents.document',
        string='Source Document',
        required=True,
        readonly=True,
        ondelete='cascade',
    )
    document_name = fields.Char(related='document_id.name', readonly=True)
    document_mimetype = fields.Char(related='document_id.mimetype', readonly=True)

    partner_id = fields.Many2one(
        'res.partner',
        string='Vendor',
        domain="[('supplier_rank', '>', 0)]",
    )
    move_type = fields.Selection(
        [
            ('in_invoice', 'Vendor Bill'),
            ('in_refund', 'Vendor Credit Note'),
        ],
        string='Type',
        default='in_invoice',
        required=True,
    )
    company_id = fields.Many2one(
        'res.company',
        string='Company',
        default=lambda self: self.env.company,
        required=True,
    )
    journal_id = fields.Many2one(
        'account.journal',
        string='Journal',
        domain="[('type', '=', 'purchase'), ('company_id', '=', company_id)]",
        default=lambda self: self._default_journal(),
    )

    @api.model
    def _default_journal(self):
        return self.env['account.journal'].search(
            [('type', '=', 'purchase'),
             ('company_id', '=', self.env.company.id)],
            limit=1,
        )

    @api.onchange('company_id')
    def _onchange_company_id(self):
        if self.journal_id and self.journal_id.company_id != self.company_id:
            self.journal_id = self.env['account.journal'].search(
                [('type', '=', 'purchase'),
                 ('company_id', '=', self.company_id.id)],
                limit=1,
            )

    def action_create_invoice(self):
        self.ensure_one()
        if not self.document_id:
            raise UserError(_("No document selected."))
        if self.document_id.move_id:
            raise UserError(_(
                "Document %(doc)s is already linked to invoice %(inv)s.",
                doc=self.document_id.display_name,
                inv=self.document_id.move_id.display_name,
            ))
        if not self.journal_id:
            raise UserError(_(
                "No purchase journal configured for company %s.",
                self.company_id.display_name,
            ))

        move_vals = {
            'move_type': self.move_type,
            'journal_id': self.journal_id.id,
            'company_id': self.company_id.id,
        }
        if self.partner_id:
            move_vals['partner_id'] = self.partner_id.id

        move = self.env['account.move'].create(move_vals)

        attachment = self.document_id.attachment_id
        if attachment:
            attachment_copy = attachment.copy({
                'res_model': 'account.move',
                'res_id': move.id,
            })
            move.message_post(
                body=_(
                    "Created from Documents source: <strong>%s</strong>",
                    self.document_id.name,
                ),
                attachment_ids=[attachment_copy.id],
            )
        else:
            move.message_post(body=_(
                "Created from Documents source: <strong>%s</strong> "
                "(no attachment to copy).",
                self.document_id.name,
            ))

        self.document_id.move_id = move.id

        return {
            'type': 'ir.actions.act_window',
            'name': MOVE_TYPE_LABELS.get(self.move_type, _('Invoice')),
            'res_model': 'account.move',
            'view_mode': 'form',
            'res_id': move.id,
        }