"""Tests for artifacts module — per-session CRUD storage."""

import sys
import os

# Add backend to sys.path so we can import artifacts
sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "backend"))

import pytest

import artifacts
from artifacts import list_artifacts, get_artifact, save_artifact


@pytest.fixture(autouse=True)
def temp_artifacts(tmp_path, monkeypatch):
    """Redirect ARTIFACTS_DIR to a temp path for test isolation."""
    monkeypatch.setattr(artifacts, "ARTIFACTS_DIR", tmp_path)


def test_list_empty_session():
    """Returns empty list for an unknown session (no directory)."""
    result = list_artifacts("session-unknown")
    assert result == []


def test_save_and_list():
    """Save an artifact then list returns 1 artifact with correct fields."""
    save_artifact("session-1", "guide.md", "# Guide content")
    result = list_artifacts("session-1")
    assert len(result) == 1
    assert result[0]["name"] == "guide.md"
    assert result[0]["session_id"] == "session-1"


def test_save_and_get():
    """Save an artifact then get returns the content."""
    save_artifact("session-1", "notes.txt", "hello world")
    content = get_artifact("session-1", "notes.txt")
    assert content == "hello world"


def test_get_nonexistent():
    """get_artifact returns None if file doesn't exist."""
    result = get_artifact("session-1", "nonexistent.md")
    assert result is None


def test_multiple_artifacts():
    """2 artifacts for s1, 1 for s2 — list lengths match."""
    save_artifact("s1", "a.md", "content a")
    save_artifact("s1", "b.md", "content b")
    save_artifact("s2", "c.md", "content c")

    s1_list = list_artifacts("s1")
    s2_list = list_artifacts("s2")

    assert len(s1_list) == 2
    assert len(s2_list) == 1


def test_overwrite_artifact():
    """Save twice with same name → only 1 artifact, content is the second."""
    save_artifact("session-1", "doc.md", "first content")
    save_artifact("session-1", "doc.md", "second content")

    result = list_artifacts("session-1")
    assert len(result) == 1

    content = get_artifact("session-1", "doc.md")
    assert content == "second content"