"""WebSocket API tests (CI): layout ops, config rev conflict, not_ready gate."""
import pytest


@pytest.fixture(autouse=True)
def _enable_custom_integrations(enable_custom_integrations):
    """Allow loading custom_components in the test hass."""
    yield

from homeassistant.core import HomeAssistant
from pytest_homeassistant_custom_component.common import MockConfigEntry
from pytest_homeassistant_custom_component.typing import WebSocketGenerator

from custom_components.houseplan.const import DOMAIN


async def _setup(hass: HomeAssistant) -> MockConfigEntry:
    entry = MockConfigEntry(domain=DOMAIN, title="House Plan", data={}, options={})
    entry.add_to_hass(hass)
    assert await hass.config_entries.async_setup(entry.entry_id)
    await hass.async_block_till_done()
    return entry


async def test_layout_roundtrip(hass: HomeAssistant, hass_ws_client: WebSocketGenerator) -> None:
    await _setup(hass)
    client = await hass_ws_client(hass)

    await client.send_json_auto_id({"type": "houseplan/layout/get"})
    resp = await client.receive_json()
    assert resp["success"] and resp["result"]["layout"] == {}

    await client.send_json_auto_id(
        {"type": "houseplan/layout/set", "layout": {"dev1": {"s": "f1", "x": 0.5, "y": 0.5}}}
    )
    assert (await client.receive_json())["success"]

    await client.send_json_auto_id(
        {"type": "houseplan/layout/update", "device_id": "dev2", "pos": {"s": "f1", "x": 0.1, "y": 0.2}}
    )
    assert (await client.receive_json())["success"]

    await client.send_json_auto_id({"type": "houseplan/layout/delete", "device_id": "dev1"})
    assert (await client.receive_json())["success"]

    await client.send_json_auto_id({"type": "houseplan/layout/get"})
    resp = await client.receive_json()
    assert set(resp["result"]["layout"]) == {"dev2"}


async def test_config_rev_conflict(hass: HomeAssistant, hass_ws_client: WebSocketGenerator) -> None:
    await _setup(hass)
    client = await hass_ws_client(hass)
    cfg = {"spaces": [], "markers": [], "settings": {}}

    await client.send_json_auto_id({"type": "houseplan/config/set", "config": cfg, "expected_rev": 0})
    resp = await client.receive_json()
    assert resp["success"] and resp["result"]["rev"] == 1

    # stale expected_rev must be rejected with `conflict`
    await client.send_json_auto_id({"type": "houseplan/config/set", "config": cfg, "expected_rev": 0})
    resp = await client.receive_json()
    assert not resp["success"] and resp["error"]["code"] == "conflict"

    await client.send_json_auto_id({"type": "houseplan/config/get"})
    resp = await client.receive_json()
    assert resp["result"]["rev"] == 1


async def test_not_ready_without_entry(hass: HomeAssistant, hass_ws_client: WebSocketGenerator) -> None:
    """WS commands answer not_ready when the integration has no loaded entry."""
    # register only the WS commands, without an entry
    from custom_components.houseplan import websocket_api as hp_ws

    hp_ws.async_register(hass)
    client = await hass_ws_client(hass)
    await client.send_json_auto_id({"type": "houseplan/layout/get"})
    resp = await client.receive_json()
    assert not resp["success"] and resp["error"]["code"] == "not_ready"


async def test_plan_set_validates(hass: HomeAssistant, hass_ws_client: WebSocketGenerator) -> None:
    await _setup(hass)
    client = await hass_ws_client(hass)

    await client.send_json_auto_id(
        {"type": "houseplan/plan/set", "space_id": "../evil", "ext": "png", "data": "aGk="}
    )
    resp = await client.receive_json()
    assert not resp["success"] and resp["error"]["code"] == "invalid_space_id"

    await client.send_json_auto_id(
        {"type": "houseplan/plan/set", "space_id": "s1", "ext": "png", "data": "%%%not-base64%%%"}
    )
    resp = await client.receive_json()
    assert not resp["success"] and resp["error"]["code"] == "invalid_data"

    await client.send_json_auto_id(
        {"type": "houseplan/plan/set", "space_id": "s1", "ext": "png", "data": "aGVsbG8="}
    )
    resp = await client.receive_json()
    url = resp["result"]["url"]
    assert resp["success"]
    # versioned name: "<space>.<token>.<ext>" (review R2-1)
    name = url.rsplit("/", 1)[-1]
    assert name.startswith("s1.") and name.endswith(".png") and len(name.split(".")) == 3


async def test_plan_upload_does_not_touch_the_previous_file(
    hass: HomeAssistant, hass_ws_client: WebSocketGenerator
) -> None:
    """review R2-1: a rejected config write must leave the stored plan intact.

    The upload used to overwrite "<space>.<ext>" (and unlink the other
    extension) BEFORE the revision-checked config write, so a conflict left the
    live plan replaced — or, with a new extension, pointing at a deleted file.
    """
    from pathlib import Path

    from custom_components.houseplan.const import PLANS_DIR

    await _setup(hass)
    client = await hass_ws_client(hass)
    plans = Path(hass.config.path(PLANS_DIR))
    plans.mkdir(parents=True, exist_ok=True)
    # the HA test config dir is shared across a module: start from a known state
    for stale in plans.glob("s9.*"):
        stale.unlink()
    legacy = plans / "s9.svg"  # what an older version stored, still referenced
    legacy.write_bytes(b"<svg>old</svg>")

    await client.send_json_auto_id(
        {"type": "houseplan/plan/set", "space_id": "s9", "ext": "png", "data": "aGVsbG8="}
    )
    first = (await client.receive_json())["result"]["url"].rsplit("/", 1)[-1]

    # pretend the config write was rejected: no cleanup call follows
    assert legacy.read_bytes() == b"<svg>old</svg>"
    assert (plans / first).is_file()

    # a second attempt neither overwrites the first nor the legacy file
    await client.send_json_auto_id(
        {"type": "houseplan/plan/set", "space_id": "s9", "ext": "png", "data": "d29ybGQ="}
    )
    second = (await client.receive_json())["result"]["url"].rsplit("/", 1)[-1]
    assert second != first
    assert (plans / first).read_bytes() == b"hello"
    assert (plans / second).read_bytes() == b"world"
    assert legacy.is_file()

    # config accepted → cleanup keeps exactly the referenced file
    await client.send_json_auto_id(
        {"type": "houseplan/plan/cleanup", "space_id": "s9", "keep": second}
    )
    resp = await client.receive_json()
    assert resp["success"] and resp["result"]["removed"] == 2
    assert (plans / second).is_file()
    assert not legacy.exists() and not (plans / first).exists()


async def test_plan_cleanup_never_reaches_another_space(
    hass: HomeAssistant, hass_ws_client: WebSocketGenerator
) -> None:
    """A space id cannot contain '.', so "<space>.<token>.<ext>" is unambiguous.

    With '-' as the separator, cleaning "f1" would have eaten the files of a
    space called "f1-attic".
    """
    from pathlib import Path

    from custom_components.houseplan.const import PLANS_DIR

    await _setup(hass)
    client = await hass_ws_client(hass)
    plans = Path(hass.config.path(PLANS_DIR))
    plans.mkdir(parents=True, exist_ok=True)
    for name in ("f1.aaaa1111.png", "f1.bbbb2222.png", "f1-attic.cccc3333.png", "f1-attic.png", "notes.txt"):
        (plans / name).write_bytes(b"x")

    await client.send_json_auto_id(
        {"type": "houseplan/plan/cleanup", "space_id": "f1", "keep": "f1.bbbb2222.png"}
    )
    resp = await client.receive_json()
    assert resp["success"] and resp["result"]["removed"] == 1
    assert not (plans / "f1.aaaa1111.png").exists()
    assert (plans / "f1.bbbb2222.png").is_file()
    assert (plans / "f1-attic.cccc3333.png").is_file()
    assert (plans / "f1-attic.png").is_file()
    assert (plans / "notes.txt").is_file()


async def test_plan_cleanup_rejects_a_bad_space_id(
    hass: HomeAssistant, hass_ws_client: WebSocketGenerator
) -> None:
    await _setup(hass)
    client = await hass_ws_client(hass)
    await client.send_json_auto_id(
        {"type": "houseplan/plan/cleanup", "space_id": "../evil", "keep": "x.png"}
    )
    resp = await client.receive_json()
    assert not resp["success"] and resp["error"]["code"] == "invalid_space_id"


async def test_admin_check_fails_closed(hass, hass_ws_client):
    """audit B2/T4: with no config entry the policy is unknown — deny writes.

    This used to allow them: plan uploads slipped through during a reload.
    """
    from custom_components.houseplan import websocket_api as wsapi

    class _User:
        is_admin = False

    class _Conn:
        user = _User()

    # no entry at all → non-admin must be refused
    assert wsapi._check_write(hass, _Conn()) is False

    class _Admin:
        is_admin = True

    class _AdminConn:
        user = _Admin()

    assert wsapi._check_write(hass, _AdminConn()) is True


async def test_files_migrate_copies_and_reports_mapping(
    hass: HomeAssistant, hass_ws_client: WebSocketGenerator
) -> None:
    """review CR-2/CR-3: migrate COPIES, never overwrites, and reports the mapping."""
    import os

    from custom_components.houseplan.const import FILES_DIR

    await _setup(hass)
    client = await hass_ws_client(hass)

    base = hass.config.path(FILES_DIR)
    src = os.path.join(base, "old1")
    dst = os.path.join(base, "new1")

    def _prepare() -> None:
        os.makedirs(src, exist_ok=True)
        os.makedirs(dst, exist_ok=True)
        with open(os.path.join(src, "m.pdf"), "wb") as fh:
            fh.write(b"SOURCE")
        # a DIFFERENT file already owns the name in the destination
        with open(os.path.join(dst, "m.pdf"), "wb") as fh:
            fh.write(b"OTHER")

    await hass.async_add_executor_job(_prepare)

    await client.send_json_auto_id(
        {"type": "houseplan/files/migrate", "from_id": "old1", "to_id": "new1"}
    )
    resp = await client.receive_json()
    assert resp["success"], resp
    mapping = resp["result"]["mapping"]
    assert mapping["m.pdf"] != "m.pdf"  # renamed instead of overwriting

    def _read_all() -> tuple[bool, bytes, bytes]:
        with open(os.path.join(dst, "m.pdf"), "rb") as fh:
            other = fh.read()
        with open(os.path.join(dst, mapping["m.pdf"]), "rb") as fh:
            copied = fh.read()
        return os.path.isfile(os.path.join(src, "m.pdf")), other, copied

    src_kept, other, copied = await hass.async_add_executor_job(_read_all)
    assert src_kept, "migrate must COPY, not move (review CR-2)"
    assert other == b"OTHER" and copied == b"SOURCE"

    # cleanup runs only after the config is safely committed
    await client.send_json_auto_id({"type": "houseplan/files/cleanup", "marker_id": "old1"})
    resp2 = await client.receive_json()
    assert resp2["success"] and resp2["result"]["removed"] is True
    assert not await hass.async_add_executor_job(lambda: os.path.isdir(src))


async def test_content_signed_path_opens_without_a_bearer_header(
    hass: HomeAssistant, hass_ws_client: WebSocketGenerator, hass_client_no_auth
) -> None:
    """B1 follow-up: a browser <image>/<a> sends no Authorization header.

    The unsigned url must be refused and the signed one must work — otherwise
    plan backgrounds and PDF links 401 on a real dashboard (reproduced live,
    2026-07-27).
    """
    import os

    from custom_components.houseplan.const import CONTENT_URL, PLANS_DIR

    await _setup(hass)
    plans = hass.config.path(PLANS_DIR)

    def _write() -> None:
        os.makedirs(plans, exist_ok=True)
        with open(os.path.join(plans, "s1.png"), "wb") as fh:
            fh.write(b"PNGDATA")

    await hass.async_add_executor_job(_write)
    path = f"{CONTENT_URL}/plans/_/s1.png"

    client = await hass_ws_client(hass)
    await client.send_json_auto_id({"type": "houseplan/content/sign", "paths": [path]})
    resp = await client.receive_json()
    assert resp["success"], resp
    signed = resp["result"]["urls"][path]
    assert "authSig=" in signed

    http = await hass_client_no_auth()
    assert (await http.get(path)).status == 401          # unsigned: refused
    ok = await http.get(signed)
    assert ok.status == 200 and await ok.read() == b"PNGDATA"

    # only our own endpoint may be signed
    await client.send_json_auto_id(
        {"type": "houseplan/content/sign", "paths": ["/api/other/secret"]}
    )
    resp2 = await client.receive_json()
    assert resp2["success"] and resp2["result"]["urls"] == {}