"""Unit Tests - FileHandler - ServiceManagerWeb

Tests para app.core.file_handler.FileHandler.
"""

import io
import uuid
import tempfile

import pytest
from fastapi import UploadFile
from fastapi import HTTPException


@pytest.mark.asyncio
async def test_save_upload_pdf_valid_streaming():
    from app.core.file_handler import FileHandler, settings

    with tempfile.TemporaryDirectory() as tmp:
        settings.UPLOAD_PATH = tmp
        handler = FileHandler()

        tenant_id = uuid.uuid4()
        ticket_id = uuid.uuid4()

        content = b"%PDF-1.7\n%\xe2\xe3\xcf\xd3\n1 0 obj\n<<>>\nendobj\n"
        up = UploadFile(filename="test.pdf", file=io.BytesIO(content))

        meta = await handler.save_upload(up, tenant_id=tenant_id, ticket_id=ticket_id)
        assert meta["file_size"] == len(content)
        assert meta["original_filename"] == "test.pdf"
        assert meta["filename"].endswith(".pdf")
        assert meta["md5_hash"]
        assert meta["sha256_hash"]


@pytest.mark.asyncio
async def test_save_upload_pdf_invalid_magic_bytes_rejected():
    from app.core.file_handler import FileHandler, settings

    with tempfile.TemporaryDirectory() as tmp:
        settings.UPLOAD_PATH = tmp
        handler = FileHandler()

        up = UploadFile(filename="bad.pdf", file=io.BytesIO(b"NOTPDF"))

        with pytest.raises(HTTPException) as exc:
            await handler.save_upload(up, tenant_id=uuid.uuid4(), ticket_id=uuid.uuid4())

        assert exc.value.status_code == 400


@pytest.mark.asyncio
async def test_save_upload_oversize_rejected_and_file_removed():
    from app.core.file_handler import FileHandler, settings

    with tempfile.TemporaryDirectory() as tmp:
        settings.UPLOAD_PATH = tmp
        settings.MAX_UPLOAD_SIZE_MB = 0  # 0MB => max 0 bytes
        handler = FileHandler()

        up = UploadFile(filename="a.txt", file=io.BytesIO(b"x"))

        with pytest.raises(HTTPException) as exc:
            await handler.save_upload(up, tenant_id=uuid.uuid4(), ticket_id=uuid.uuid4())

        assert exc.value.status_code == 413


def test_get_file_path_prevents_path_traversal():
    from app.core.file_handler import FileHandler, settings

    with tempfile.TemporaryDirectory() as tmp:
        settings.UPLOAD_PATH = tmp
        handler = FileHandler()

        with pytest.raises(HTTPException) as exc:
            handler.get_file_path("../../etc/passwd")

        assert exc.value.status_code == 403