"""Tests for esphome.arduino8266.framework (downloads and environment)."""

from __future__ import annotations

import os
from pathlib import Path
from unittest.mock import patch

import pytest

from esphome.arduino8266 import framework
from esphome.components.esp8266 import RECOMMENDED_ARDUINO_FRAMEWORK_VERSION
import esphome.config_validation as cv
from esphome.core import CORE, EsphomeError


@pytest.fixture(autouse=True)
def _build_path(tmp_path: Path) -> None:
    CORE.build_path = tmp_path


def test_tools_path_default_and_prefix(tmp_path: Path) -> None:
    with patch.dict(os.environ, {"ESPHOME_ARDUINO8266_PREFIX": str(tmp_path)}):
        assert framework.get_arduino8266_tools_path() == tmp_path.resolve()
    # A blank prefix must be treated as unset, not as the CWD
    with patch.dict(os.environ, {"ESPHOME_ARDUINO8266_PREFIX": "  "}):
        path = framework.get_arduino8266_tools_path()
    assert path.name == "arduino8266"
    assert path != Path.cwd()


def _recommended() -> framework.FrameworkRelease:
    return framework.FRAMEWORK_RELEASES[RECOMMENDED_ARDUINO_FRAMEWORK_VERSION]


def test_framework_releases_are_pinned() -> None:
    """A release must not be pinned without its checksum, and the recommended
    core must have one."""
    assert RECOMMENDED_ARDUINO_FRAMEWORK_VERSION in framework.FRAMEWORK_RELEASES
    for version, release in framework.FRAMEWORK_RELEASES.items():
        assert release.tag.startswith(f"{version}-esphome.")
        assert len(release.sha256) == 64
        assert release.size > 0


def test_framework_download() -> None:
    download = framework.FrameworkRelease("1.2.3-esphome.4", "a" * 64, 5).download()
    releases = "https://github.com/esphome-libs/arduino-esp8266/releases/"
    archive = "arduino-esp8266-1.2.3-esphome.4.tar.gz"
    assert download == (f"{releases}download/1.2.3-esphome.4/{archive}", "a" * 64, 5)


def test_toolchain_builds_are_pinned() -> None:
    """A release must not be pinned without its checksums."""
    for sha256, size in framework.TOOLCHAIN_BUILDS.values():
        assert len(sha256) == 64
        assert size > 0


def test_toolchain_download() -> None:
    sha256, size = framework.TOOLCHAIN_BUILDS["darwin_arm64"]
    with (
        patch.object(framework, "TOOLCHAIN_VERSION", "1.2.3"),
        patch.object(framework, "get_systype", return_value="darwin_arm64"),
    ):
        download = framework.toolchain_download()
    releases = "https://github.com/esphome-libs/xtensa-lx106-elf-toolchain/releases/"
    archive = "toolchain-xtensa-lx106-elf-1.2.3-darwin_arm64.tar.gz"
    assert download == (f"{releases}download/1.2.3/{archive}", sha256, size)


def test_toolchain_download_unsupported_system() -> None:
    with (
        patch.object(framework, "get_systype", return_value="linux_armv7l"),
        pytest.raises(
            EsphomeError, match=r"linux_armv7l.*darwin_arm64.*toolchain: platformio"
        ),
    ):
        framework.toolchain_download()


def _fake_framework(tmp_path: Path) -> None:
    """The layout install_package expects of an installed framework."""
    for sub in ("cores/esp8266", "tools/sdk", "libraries"):
        (tmp_path / "frameworks" / _recommended().tag / sub).mkdir(parents=True)
    (tmp_path / "frameworks" / _recommended().tag / ".esphome_extracted").touch()


def test_check_and_install_mirror_skips_pinned_toolchain(tmp_path: Path) -> None:
    """With a mirror override an unsupported host can bring its own toolchain."""
    with (
        patch.dict(os.environ, {"ESPHOME_ARDUINO8266_PREFIX": str(tmp_path)}),
        patch.object(framework, "ESPHOME_ARDUINO8266_FRAMEWORK_MIRRORS", ["http://f"]),
        patch.object(framework, "ESPHOME_ARDUINO8266_TOOLCHAIN_MIRRORS", ["http://m"]),
        patch.object(framework, "install_packages") as mock_install,
        patch.object(framework, "prefetch_packages") as mock_prefetch,
        patch.object(framework, "find_ninja", return_value=tmp_path / "ninja"),
    ):
        framework.check_and_install(cv.Version(3, 1, 2))
    assert mock_prefetch.call_args.args[2] == {}
    assert mock_install.call_args.args[2] == {}


def test_check_and_install_installed_toolchain_on_unsupported_host(
    tmp_path: Path,
) -> None:
    """The host is only checked when the toolchain must be downloaded."""
    _fake_framework(tmp_path)
    toolchain = tmp_path / "toolchains" / framework.TOOLCHAIN_VERSION
    for sub in ("bin", "xtensa-lx106-elf"):
        (toolchain / sub).mkdir(parents=True)
    (toolchain / ".esphome_extracted").touch()
    with (
        patch.dict(os.environ, {"ESPHOME_ARDUINO8266_PREFIX": str(tmp_path)}),
        patch.object(framework, "get_systype", return_value="linux_armv7l"),
        patch.object(framework, "prefetch_packages"),
        patch.object(framework, "find_ninja", return_value=tmp_path / "ninja"),
    ):
        paths = framework.check_and_install(cv.Version(3, 1, 2))
    assert paths.toolchain == toolchain


def test_check_and_install_unsupported_host_without_toolchain_raises(
    tmp_path: Path,
) -> None:
    """Without an installed toolchain the download is needed, and the host
    error names the ways out."""
    _fake_framework(tmp_path)
    with (
        patch.dict(os.environ, {"ESPHOME_ARDUINO8266_PREFIX": str(tmp_path)}),
        patch.object(framework, "get_systype", return_value="linux_armv7l"),
        patch.object(framework, "prefetch_packages"),
        patch.object(framework, "find_ninja", return_value=tmp_path / "ninja"),
        pytest.raises(EsphomeError, match=r"linux_armv7l.*toolchain: platformio"),
    ):
        framework.check_and_install(cv.Version(3, 1, 2))


def test_check_and_install_returns_paths(tmp_path: Path) -> None:
    with (
        patch.dict(os.environ, {"ESPHOME_ARDUINO8266_PREFIX": str(tmp_path)}),
        patch.object(framework, "install_packages") as mock_install,
        patch.object(framework, "prefetch_packages") as mock_prefetch,
        patch.object(framework, "find_ninja", return_value=tmp_path / "ninja"),
    ):
        paths = framework.check_and_install(cv.Version(3, 1, 2))
    assert paths.framework == tmp_path / "frameworks" / _recommended().tag
    assert paths.toolchain == tmp_path / "toolchains" / framework.TOOLCHAIN_VERSION
    assert paths.ninja == tmp_path / "ninja"
    # Full argument pinning: a copy-paste swap between the two near-identical
    # specs (mirrors, destination) must not stay green
    assert mock_install.call_args.args == (
        (
            (
                framework.FRAMEWORK_PACKAGE,
                _recommended().tag,
                tmp_path / "frameworks" / _recommended().tag,
                framework.ESPHOME_ARDUINO8266_FRAMEWORK_MIRRORS,
                ("cores/esp8266", "tools/sdk", "libraries"),
            ),
            (
                framework.TOOLCHAIN_PACKAGE,
                framework.TOOLCHAIN_VERSION,
                tmp_path / "toolchains" / framework.TOOLCHAIN_VERSION,
                framework.ESPHOME_ARDUINO8266_TOOLCHAIN_MIRRORS,
                ("bin", "xtensa-lx106-elf"),
            ),
        ),
        tmp_path / "downloads",
        {
            framework.FRAMEWORK_PACKAGE: _recommended().download,
            framework.TOOLCHAIN_PACKAGE: framework.toolchain_download,
        },
    )
    # One spec list feeds both phases, so they cannot drift
    assert mock_prefetch.call_args.args == mock_install.call_args.args
    # PackageSpec instances, not bare tuples: the batch header reads .name
    assert all(
        isinstance(spec, framework.PackageSpec)
        for spec in mock_install.call_args.args[0]
    )


def test_get_build_env_prepends_toolchain_bin(tmp_path: Path) -> None:
    with patch.object(framework, "ccache_env", return_value={"CCACHE_DIR": "x"}):
        env = framework.get_build_env(tmp_path, None)
    assert env["PATH"].startswith(str(tmp_path / "bin") + os.pathsep)
    assert env["CCACHE_DIR"] == "x"


def test_check_and_install_rejects_unbuilt_core(tmp_path: Path) -> None:
    """A core version without a build fails before any download."""
    with pytest.raises(EsphomeError, match=r"3\.1\.1.*available: 3\.1\.2"):
        framework.check_and_install(cv.Version(3, 1, 1))


def test_get_build_env_without_path_has_no_empty_entry(tmp_path: Path) -> None:
    """An absent PATH must not leave a trailing separator (an empty entry
    means the current directory to the shell)."""
    with (
        patch.dict(os.environ, {}, clear=True),
        patch.object(framework, "ccache_env", return_value={}),
    ):
        env = framework.get_build_env(tmp_path, None)
    assert env["PATH"] == str(tmp_path / "bin")
    with (
        patch.dict(
            os.environ, {"PATH": f"/usr/bin{os.pathsep}{os.pathsep}/bin"}, clear=True
        ),
        patch.object(framework, "ccache_env", return_value={}),
    ):
        env = framework.get_build_env(tmp_path, None)
    assert env["PATH"].split(os.pathsep) == [str(tmp_path / "bin"), "/usr/bin", "/bin"]


def test_toolchain_tool_layout(tmp_path: Path) -> None:
    """One owner for the bin/xtensa-lx106-elf-<name> layout."""
    tool = framework.toolchain_tool(tmp_path, "addr2line")
    assert tool.parent == tmp_path / "bin"
    assert tool.name.startswith("xtensa-lx106-elf-addr2line")
    assert (tool.suffix == ".exe") is (os.name == "nt")


def test_get_build_env_uses_the_arduino8266_ccache_dir(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    monkeypatch.setenv("ESPHOME_ARDUINO8266_PREFIX", str(tmp_path / "cache"))
    monkeypatch.delenv("CCACHE_DIR", raising=False)
    env = framework.get_build_env(tmp_path / "toolchain", "/usr/bin/ccache")
    assert env["CCACHE_DIR"] == str((tmp_path / "cache").resolve() / "ccache")
    # None means resolved and disabled
    assert "CCACHE_DIR" not in framework.get_build_env(tmp_path / "toolchain", None)