# Fusion Accounting - CSV/XLS/XLSX Bank Statement Import
# Registers spreadsheet formats and routes uploads to the base_import wizard

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


class FusionJournalCSVImport(models.Model):
    """Extends the journal import pipeline with CSV, XLS, and XLSX
    support. Uploads matching these formats are routed through
    the ``base_import`` wizard for column mapping."""

    _inherit = 'account.journal'

    # ---- Format Registration ----
    def _get_bank_statements_available_import_formats(self):
        """Append spreadsheet formats to the list of importable types."""
        supported = super()._get_bank_statements_available_import_formats()
        supported.extend(['CSV', 'XLS', 'XLSX'])
        return supported

    # ---- Helpers ----
    def _is_spreadsheet_file(self, filename):
        """Return True when *filename* has a CSV/XLS/XLSX extension."""
        return bool(
            filename
            and filename.lower().strip().endswith(('.csv', '.xls', '.xlsx'))
        )

    # ---- Import Override ----
    def _import_bank_statement(self, attachments):
        """Intercept spreadsheet uploads and redirect them to the
        interactive column-mapping wizard. Non-spreadsheet files fall
        through to the standard import chain.

        Mixing CSV files with other formats or uploading more than one
        CSV file at a time is not permitted.
        """
        if len(attachments) > 1:
            is_spreadsheet = [
                bool(self._is_spreadsheet_file(att.name)) for att in attachments
            ]
            if True in is_spreadsheet and False in is_spreadsheet:
                raise UserError(
                    _('Mixing CSV/XLS files with other file types is not allowed.')
                )
            if is_spreadsheet.count(True) > 1:
                raise UserError(_('Only one CSV/XLS file can be selected at a time.'))
            return super()._import_bank_statement(attachments)

        if not self._is_spreadsheet_file(attachments.name):
            return super()._import_bank_statement(attachments)

        # Create the base_import wizard and launch the interactive mapper
        env_ctx = dict(self.env.context)
        wizard = self.env['base_import.import'].create({
            'res_model': 'account.bank.statement.line',
            'file': attachments.raw,
            'file_name': attachments.name,
            'file_type': attachments.mimetype,
        })
        env_ctx['wizard_id'] = wizard.id
        env_ctx['default_journal_id'] = self.id

        return {
            'type': 'ir.actions.client',
            'tag': 'import_bank_stmt',
            'params': {
                'model': 'account.bank.statement.line',
                'context': env_ctx,
                'filename': 'bank_statement_import.csv',
            },
        }