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

from odoo import models


class IrAttachment(models.Model):
    _inherit = "ir.attachment"

    def action_fusion_preview(self, title=None, model_name=None, record_ids=None):
        """Return the right action to "view" this attachment.

        - PDF attachments → fusion_pdf_preview's client dialog (preview
          + print + download all in one place, with audit log).
        - Anything else (ZPL, CSV, XML, images, etc.) → legacy
          new-tab/download URL since the PDF viewer can't render them.

        Drop-in replacement for the common pattern:
            return {
                'type': 'ir.actions.act_url',
                'url':  '/web/content/%s?download=true' % att.id,
                'target': 'new',
            }

        Use as:  return att.action_fusion_preview(title='My Doc')

        See CLAUDE.md "PDF Preview" for the full contract.
        """
        self.ensure_one()
        is_pdf = (
            (self.mimetype or '').lower() == 'application/pdf'
            or (self.name or '').lower().endswith('.pdf')
        )
        if is_pdf:
            return {
                'type': 'ir.actions.client',
                'tag':  'fusion_pdf_preview.open_attachment',
                'params': {
                    'attachment_id': self.id,
                    'title':         title or self.name or 'Document',
                    'model_name':    model_name or '',
                    'record_ids':    str(record_ids) if record_ids else '',
                },
            }
        return {
            'type': 'ir.actions.act_url',
            'url':  '/web/content/%s?download=true' % self.id,
            'target': 'new',
        }