import json
import os
from pathlib import Path

import pytest


@pytest.fixture
def tmp_pyra_home(tmp_path, monkeypatch):
    """Redirect pyra_home() to a temporary directory for isolation."""
    fake_home = tmp_path / ".pyra"

    # Patch Path.home() so pyra_home() returns our tmp dir
    monkeypatch.setattr(
        "pyra.utils.paths.Path",
        type("FakePath", (Path,), {"home": staticmethod(lambda: tmp_path)}),
    )

    # Also patch the module-level constants already computed
    import pyra.security.boundaries as b
    import pyra.memory.index as mi
    import pyra.memory.reader as mr
    import pyra.memory.writer as mw
    import pyra.vault.reader as vr
    import pyra.vault.writer as vw
    import pyra.security.injection as si
    import pyra.config.manager as cm

    import pyra.plugins.loader as pl
    import pyra.plugins.executor as pe
    import pyra.memory.database as mdb

    b.VAULT_PATH = fake_home / "vault"
    b.BLOCKED_PREFIXES = [b.VAULT_PATH]
    mi._MEMORY_ROOT = fake_home / "memory"
    mi._INDEX_FILE = fake_home / "memory" / "MEMORY_INDEX.md"
    mr._MEMORY_ROOT = fake_home / "memory"
    mw._MEMORY_ROOT = fake_home / "memory"
    mdb._DB_PATH = fake_home / "memory" / "memory.db"
    mdb._MEMORY_ROOT = fake_home / "memory"
    vr._KEYS_FILE = fake_home / "vault" / "secrets" / "api_keys.json"
    vw._KEYS_FILE = fake_home / "vault" / "secrets" / "api_keys.json"
    si._LOG_FILE = fake_home / "security.log"
    cm._CONFIG_PATH = fake_home / "config.yaml"
    pl._LOG_FILE = fake_home / "logs" / "plugin_errors.log"
    pe._LOG_FILE = fake_home / "logs" / "tool_executions.log"

    # Bootstrap the directory structure
    (fake_home / "vault").mkdir(parents=True)
    (fake_home / "vault" / "secrets").mkdir()
    (fake_home / "vault" / ".vault_lock").touch(mode=0o400)
    (fake_home / "memory" / "user").mkdir(parents=True)
    (fake_home / "memory" / "context").mkdir()
    (fake_home / "memory" / "knowledge").mkdir()
    (fake_home / "plugins").mkdir()
    (fake_home / "logs").mkdir()

    mdb.init_db()

    # Reset plugin registry singleton so tests don't share state
    from pyra.plugins.registry import PluginRegistry
    PluginRegistry.reset()

    return fake_home


@pytest.fixture
def lmstudio_available():
    """Skip test if LM Studio is not reachable."""
    import httpx
    try:
        r = httpx.get("http://localhost:1234/v1/models", timeout=2.0)
        r.raise_for_status()
        return True
    except Exception:
        pytest.skip("LM Studio not reachable at localhost:1234")