"""Tests for the warranty proof-of-cover document.

A provider lookup answers whether a unit is covered; it does not produce the
invoice or the extended-warranty certificate. Those had nowhere to live, so
they stayed in somebody's mailbox. These pin the parts that are easy to get
wrong: the document is authenticated on the way out, one per warranty, and the
vendor's own filename survives so a download is recognisable.
"""

import io

from plugins.warranty.models import Warranty


def _warranty(db, vendor='Dell'):
    w = Warranty(vendor=vendor, servicetag='ABC123', provider='manual')
    db.session.add(w)
    db.session.commit()
    return w


def test_upload_sets_url_and_keeps_the_original_filename(client, db, auth_headers):
    w = _warranty(db)

    response = client.post(f'/api/warranty/{w.warrantyid}/proof',
                           data={'file': (io.BytesIO(b'%PDF-1.4 invoice'),
                                          'Dell invoice 4471.pdf')},
                           content_type='multipart/form-data',
                           headers=auth_headers)

    assert response.status_code == 200, response.get_json()
    body = response.get_json()['data']
    assert body['proofurl'] == f'/api/warranty/proof/warranty-{w.warrantyid}.pdf'
    assert body['prooffilename'] == 'Dell invoice 4471.pdf'


def test_download_needs_a_token_and_uses_the_vendor_filename(client, db, auth_headers):
    """An invoice carries pricing and a service tag - not open like an asset photo."""
    w = _warranty(db)
    client.post(f'/api/warranty/{w.warrantyid}/proof',
                data={'file': (io.BytesIO(b'%PDF-1.4 invoice'), 'Dell invoice 4471.pdf')},
                content_type='multipart/form-data', headers=auth_headers)
    path = f'/api/warranty/proof/warranty-{w.warrantyid}.pdf'

    assert client.get(path).status_code == 401

    authed = client.get(path, headers=auth_headers)
    assert authed.status_code == 200
    assert authed.data == b'%PDF-1.4 invoice'
    disposition = authed.headers.get('Content-Disposition', '')
    assert 'attachment' in disposition
    assert 'Dell invoice 4471.pdf' in disposition


def test_rejects_an_unsupported_type(client, db, auth_headers):
    w = _warranty(db)

    response = client.post(f'/api/warranty/{w.warrantyid}/proof',
                           data={'file': (io.BytesIO(b'MZ'), 'setup.exe')},
                           content_type='multipart/form-data',
                           headers=auth_headers)

    assert response.status_code == 400
    assert 'Unsupported document type' in response.get_data(as_text=True)


def test_rejects_an_oversize_document(client, db, auth_headers, monkeypatch):
    from plugins.warranty.api import routes
    monkeypatch.setattr(routes, 'MAX_PROOF_BYTES', 512)
    w = _warranty(db)

    response = client.post(f'/api/warranty/{w.warrantyid}/proof',
                           data={'file': (io.BytesIO(b'x' * 2048), 'scan.pdf')},
                           content_type='multipart/form-data',
                           headers=auth_headers)

    assert response.status_code == 400
    assert 'the limit is' in response.get_data(as_text=True)


def test_replacing_keeps_one_document_per_warranty(client, db, auth_headers):
    import glob
    import os
    from flask import current_app
    w = _warranty(db)

    client.post(f'/api/warranty/{w.warrantyid}/proof',
                data={'file': (io.BytesIO(b'first'), 'scan.png')},
                content_type='multipart/form-data', headers=auth_headers)
    client.post(f'/api/warranty/{w.warrantyid}/proof',
                data={'file': (io.BytesIO(b'%PDF second'), 'invoice.pdf')},
                content_type='multipart/form-data', headers=auth_headers)

    proofdir = os.path.join(current_app.instance_path, 'warrantyproofs')
    files = glob.glob(os.path.join(proofdir, f'warranty-{w.warrantyid}.*'))
    assert len(files) == 1 and files[0].endswith('.pdf')


def test_removing_clears_both_columns(client, db, auth_headers):
    w = _warranty(db)
    client.post(f'/api/warranty/{w.warrantyid}/proof',
                data={'file': (io.BytesIO(b'%PDF'), 'invoice.pdf')},
                content_type='multipart/form-data', headers=auth_headers)

    response = client.delete(f'/api/warranty/{w.warrantyid}/proof',
                             headers=auth_headers)

    body = response.get_json()['data']
    assert body['proofurl'] is None
    assert body['prooffilename'] is None