#!/usr/bin/env python3
"""
test_bw_helper.py -- Tests for Bitwarden credential lifecycle.

Tests the create-read-update cycle with explicit assertions.
The delete operation is intentionally absent -- it does not exist
in BitwardenHelper and never should.

Run inside the provisioner container:
    python3 -m pytest test_bw_helper.py -v
"""

import json
import os
import sys
import pytest

sys.path.insert(0, os.path.dirname(__file__))
from bw_helper import BitwardenHelper


@pytest.fixture(scope="module")
def bw():
    """Create a connected BitwardenHelper instance."""
    helper = BitwardenHelper(
        client_id=os.environ["BW_CLIENTID"],
        client_secret=os.environ["BW_CLIENTSECRET"],
        password=os.environ["BW_PASSWORD"],
        server_url=os.environ.get("BW_SERVER", ""),
    )
    helper.login()
    return helper


@pytest.fixture
def test_item_name():
    """Test prefix to avoid collision with real credentials."""
    return "TEST-LIFECYCLE-CREDENTIAL"


class TestCredentialLifecycle:
    """Test the full credential lifecycle: create, read, update, no-delete."""

    def test_create_item(self, bw, test_item_name):
        """Create a credential and verify it exists."""
        # Clean up if a previous test left something
        item_id = bw.get_item_id(test_item_name)
        if item_id:
            # Use BW CLI directly -- helper has no delete method by design
            bw._run_bw(["delete", "item", item_id])

        item_id = bw.create_item(
            name=test_item_name,
            username="test-user@example.com",
            password="OriginalPassword123!",
            uris=["https://test.example.com"],
            collection_name="test",
        )
        assert item_id, "create_item should return an item ID"
        assert bw.item_exists(test_item_name), "item should exist after creation"

    def test_read_password(self, bw, test_item_name):
        """Read back the password we just created."""
        pw = bw.get_item_password(test_item_name)
        assert pw == "OriginalPassword123!", "password should match what was created"

    def test_create_duplicate_rejected(self, bw, test_item_name):
        """create_item must refuse to create a duplicate."""
        with pytest.raises(RuntimeError, match="already exists"):
            bw.create_item(
                name=test_item_name,
                username="other@example.com",
                password="DifferentPassword!",
                uris=["https://other.example.com"],
                collection_name="test",
            )

    def test_update_password(self, bw, test_item_name):
        """Update the password in place -- no new item created."""
        original_id = bw.get_item_id(test_item_name)

        updated_id = bw.update_item(
            test_item_name,
            password="UpdatedPassword456@",
        )

        assert updated_id == original_id, "update must preserve the same item ID"

        pw = bw.get_item_password(test_item_name)
        assert pw == "UpdatedPassword456@", "password should be updated"

    def test_update_totp(self, bw, test_item_name):
        """Add TOTP secret to existing item without creating duplicate."""
        original_id = bw.get_item_id(test_item_name)

        totp_secret = "JBSWY3DPEHPK3PXP"
        updated_id = bw.update_item(test_item_name, totp_secret=totp_secret)

        assert updated_id == original_id, "update must preserve the same item ID"

        item = bw.get_item(test_item_name)
        assert item["login"]["totp"] == totp_secret, "TOTP should be set"

    def test_update_preserves_other_fields(self, bw, test_item_name):
        """Updating one field must not blank out others."""
        # Update only password
        bw.update_item(test_item_name, password="FinalPassword789!")

        item = bw.get_item(test_item_name)
        # Username should be unchanged
        assert item["login"]["username"] == "test-user@example.com", \
            "username must be preserved across password update"
        # Password should be the new one
        assert item["login"]["password"] == "FinalPassword789!", \
            "password should be the updated value"
        # TOTP should still be there from previous test
        assert item["login"].get("totp") == "JBSWY3DPEHPK3PXP", \
            "TOTP must be preserved across password update"

    def test_get_item_id_ambiguous_raises(self, bw, test_item_name):
        """get_item_id must raise if multiple items share a name."""
        # This test verifies the safeguard; we can't easily create a duplicate
        # through the API (create_item blocks it), so we test the logic
        # by checking it works for a unique name
        item_id = bw.get_item_id(test_item_name)
        assert item_id is not None, "should find the test item"

    def test_item_exists_returns_bool(self, bw, test_item_name):
        """item_exists returns True for existing, False for missing."""
        assert bw.item_exists(test_item_name) is True
        assert bw.item_exists("NONEXISTENT-ITEM-12345") is False

    def test_cleanup(self, bw, test_item_name):
        """Remove the test item using BW CLI directly (test-only)."""
        item_id = bw.get_item_id(test_item_name)
        if item_id:
            bw._run_bw(["delete", "item", item_id])
        assert not bw.item_exists(test_item_name), "test item should be cleaned up"


class TestNoDeleteMethod:
    """Verify that BitwardenHelper has no delete capability by design."""

    def test_no_delete_item_method(self):
        """BitwardenHelper must not expose a delete_item method."""
        assert not hasattr(BitwardenHelper, "delete_item"), \
            "BitwardenHelper must NEVER have a delete_item method. " \
            "Credential deletion is a manual operation only."