"""Tests for the configure_path() function in install.sh."""

from __future__ import annotations

import re
import shlex
import subprocess
import sys
import textwrap
from pathlib import Path

import pytest

# install.sh is a POSIX shell script that exercises zsh/bash/fish rc-file
# behaviour, and these tests drive it via ``subprocess.run(["bash", "-c", ...])``.
# On the GitHub Actions ``windows-latest`` runner, ``bash`` is resolved to
# ``wsl.exe`` and the runner has no installed WSL distribution — every
# ``_run`` call exits 1 with a "Windows Subsystem for Linux has no installed
# distributions" message and none of the asserted rc files get written.
# Skip the whole module rather than chase a Windows analogue for a Unix-only
# installer script.
pytestmark = pytest.mark.skipif(
    sys.platform == "win32",
    reason=(
        "install.sh is POSIX-only; the Windows runner has no usable bash "
        "(resolves to unconfigured WSL), so this module's subprocess-driven "
        "tests cannot run there. See issue #1099."
    ),
)

INSTALL_SH = Path(__file__).parents[2] / "install.sh"
_INSTALL_SH_SHELL = shlex.quote(str(INSTALL_SH))
_LOCAL_BIN = ".local/bin"
_ANSI_RE = re.compile(r"\x1b\[[0-?]*[ -/]*[@-~]")


def _strip_ansi(value: str) -> str:
    return _ANSI_RE.sub("", value)


def _visible_terminal_text(value: str) -> str:
    return _strip_ansi(value).replace("\r", "").replace("\n", "")


def _run(
    tmp_path: Path, shell: str, platform: str = "linux", install_dir: str | None = None
) -> subprocess.CompletedProcess[str]:
    fake_home = tmp_path / "home"
    fake_home.mkdir(exist_ok=True)
    idir = install_dir if install_dir is not None else str(fake_home / _LOCAL_BIN)
    install_sh = _INSTALL_SH_SHELL
    idir_shell = shlex.quote(idir)
    home_shell = shlex.quote(str(fake_home))

    script = textwrap.dedent(f"""\
        __fn=$(awk 'p&&/^}}$/{{print;exit}} /^configure_path\\(\\)/{{p=1}} p{{print}}' {install_sh})
        if [ -z "$__fn" ]; then
            echo "configure_path not found in install.sh" >&2
            exit 1
        fi
        log()  {{ printf '%s\\n' "$*"; }}
        warn() {{ printf 'Warning: %s\\n' "$*" >&2; }}
        eval "$__fn"
        INSTALL_DIR={idir_shell} platform="{platform}" HOME={home_shell} SHELL="{shell}" configure_path
    """)
    return subprocess.run(["bash", "-c", script], capture_output=True, text=True)


def _run_logging_snippet(body: str) -> subprocess.CompletedProcess[str]:
    install_sh = _INSTALL_SH_SHELL
    script = textwrap.dedent(f"""\
        eval "$(awk '/^REPO=/{{exit}} {{print}}' {install_sh})"
        eval "$(awk '
            /^[a-z_][a-z_]*\\(\\)/ {{ in_fn=1 }}
            in_fn {{ print }}
            in_fn && /^\\}}$/ {{ in_fn=0 }}
        ' {install_sh})"
        {body}
    """)
    return subprocess.run(["bash", "-c", script], capture_output=True, text=True)


def _find_release_metadata_step_block() -> str:
    lines = INSTALL_SH.read_text().splitlines()
    for i, line in enumerate(lines):
        if line.strip() != 'release_tag=""':
            continue

        block = []
        for candidate in lines[i + 1 :]:
            block.append(candidate)
            if candidate.strip() == "fi":
                return "\n".join(block)

    raise RuntimeError(f"Could not locate release metadata step block in {INSTALL_SH}.")


def _run_release_metadata_step(
    install_channel: str = "release", version: str = ""
) -> subprocess.CompletedProcess[str]:
    block = _find_release_metadata_step_block()
    install_sh = _INSTALL_SH_SHELL
    script = textwrap.dedent(f"""\
        eval "$(awk '/^REPO=/{{exit}} {{print}}' {install_sh})"
        eval "$(awk '
            /^[a-z_][a-z_]*\\(\\)/ {{ in_fn=1 }}
            in_fn {{ print }}
            in_fn && /^\\}}$/ {{ in_fn=0 }}
        ' {install_sh})"
        INSTALL_CHANNEL="{install_channel}"
        version="{version}"
        {block}
        printf '%s\\n' "$metadata_step"
    """)
    return subprocess.run(["bash", "-c", script], capture_output=True, text=True)


def test_install_sh_logging_falls_back_to_plain_text_when_not_tty() -> None:
    result = _run_logging_snippet(
        """
        warn "check config"
        success "installed"
        step "[1/4] Fetching metadata"
        """
    )

    assert result.returncode == 0, result.stderr
    assert "\x1b[" not in result.stdout + result.stderr
    assert "Warning: check config" in result.stderr
    assert "Success: installed" in result.stdout
    assert "[1/4] Fetching metadata" in result.stdout


def test_install_sh_die_falls_back_to_plain_text_when_not_tty() -> None:
    result = _run_logging_snippet('die "missing curl"')

    assert result.returncode == 1
    assert "\x1b[" not in result.stderr
    assert "Error: missing curl" in result.stderr


def test_install_sh_defines_tty_aware_ansi_formatting() -> None:
    source = INSTALL_SH.read_text()

    assert "if [ -t 1 ]; then" in source
    assert "COLOR_GREEN=$'\\033[32m'" in source
    assert "COLOR_YELLOW=$'\\033[33m'" in source
    assert "COLOR_RED=$'\\033[31m'" in source
    assert "success()" in source


def test_install_sh_success_screen_has_visual_structure() -> None:
    result = _run_logging_snippet("print_success_screen 2026.4.1")
    output = result.stdout + result.stderr

    assert result.returncode == 0, result.stderr
    assert "--------------------------------------------" in output
    assert "Success: Welcome to OpenSRE" in output
    assert "opensre v2026.4.1 installed successfully" in output
    assert "Next steps:" in output


def test_install_sh_contains_auto_onboarding_launch_hook() -> None:
    source = INSTALL_SH.read_text()

    assert "OPENSRE_AUTO_LAUNCH" in source
    assert "launch_onboarding_after_install" in source
    assert '"$installed_binary" onboard' in source


def test_install_sh_auto_onboarding_piped_installs_reattach_dev_tty() -> None:
    """Piped ``curl … | bash`` installs auto-launch onboarding via /dev/tty.

    stdin is the curl pipe there, so the wizard's stdin is reattached to the
    controlling terminal — but only when ``stty -g`` confirms the terminal can
    actually be controlled. Where that tcgetattr fails, the full-screen wizard
    would die with a terminal I/O error mid-render (issue #3273), so the
    launch is skipped instead.
    """
    source = INSTALL_SH.read_text()

    assert "controlling_tty_usable" in source
    assert "stty -g </dev/tty" in source
    assert "run_onboarding </dev/tty" in source
    # Only stdin is reattached; redirecting stdout to /dev/tty as well was the
    # original #3273 failure mode.
    assert "</dev/tty >/dev/tty 2>&1" not in source


def test_install_sh_auto_onboarding_piped_install_launches_via_pty(tmp_path: Path) -> None:
    """Simulate a piped install inside a real pty: onboarding must launch
    with its stdin reattached to the terminal."""
    import os
    import pty

    bin_dir = tmp_path / "bin"
    bin_dir.mkdir()
    fake_binary = bin_dir / "opensre"
    fake_binary.write_text(
        "#!/usr/bin/env bash\n"
        'if [ -t 0 ]; then echo "ONBOARD_STDIN_IS_TTY"; else echo "ONBOARD_STDIN_NOT_TTY"; fi\n'
    )
    fake_binary.chmod(0o755)

    script = textwrap.dedent(f"""\
        eval "$(awk '/^REPO=/{{exit}} {{print}}' {_INSTALL_SH_SHELL})"
        eval "$(awk '
            /^[a-z_][a-z_]*\\(\\)/ {{ in_fn=1 }}
            in_fn {{ print }}
            in_fn && /^\\}}$/ {{ in_fn=0 }}
        ' {_INSTALL_SH_SHELL})"
        INSTALL_DIR={shlex.quote(str(bin_dir))}
        BIN_NAME="opensre"
        platform="linux"
        launch_onboarding_after_install </dev/null
    """)

    pid, controller_fd = pty.fork()
    if pid == 0:  # pragma: no cover - child process replaced by bash
        os.execvp("bash", ["bash", "-c", script])

    chunks = []
    try:
        while True:
            try:
                chunk = os.read(controller_fd, 4096)
            except OSError:  # Linux raises EIO once the child side closes
                break
            if not chunk:
                break
            chunks.append(chunk)
    finally:
        os.close(controller_fd)
        _, wait_status = os.waitpid(pid, 0)

    output = b"".join(chunks).decode(errors="replace")
    assert os.waitstatus_to_exitcode(wait_status) == 0, output
    assert "Launching opensre onboard" in output
    assert "ONBOARD_STDIN_IS_TTY" in output


def test_install_sh_auto_onboarding_skips_piped_install_on_windows(tmp_path: Path) -> None:
    """Git Bash /dev/tty emulation is not trusted: piped installs on the
    windows platform never auto-launch."""
    import os
    import pty

    bin_dir = tmp_path / "bin"
    bin_dir.mkdir()
    fake_binary = bin_dir / "opensre"
    fake_binary.write_text('#!/usr/bin/env bash\necho "ONBOARD_RAN"\n')
    fake_binary.chmod(0o755)

    script = textwrap.dedent(f"""\
        eval "$(awk '/^REPO=/{{exit}} {{print}}' {_INSTALL_SH_SHELL})"
        eval "$(awk '
            /^[a-z_][a-z_]*\\(\\)/ {{ in_fn=1 }}
            in_fn {{ print }}
            in_fn && /^\\}}$/ {{ in_fn=0 }}
        ' {_INSTALL_SH_SHELL})"
        INSTALL_DIR={shlex.quote(str(bin_dir))}
        BIN_NAME="opensre"
        platform="windows"
        launch_onboarding_after_install </dev/null
    """)

    pid, controller_fd = pty.fork()
    if pid == 0:  # pragma: no cover - child process replaced by bash
        os.execvp("bash", ["bash", "-c", script])

    chunks = []
    try:
        while True:
            try:
                chunk = os.read(controller_fd, 4096)
            except OSError:
                break
            if not chunk:
                break
            chunks.append(chunk)
    finally:
        os.close(controller_fd)
        _, wait_status = os.waitpid(pid, 0)

    output = b"".join(chunks).decode(errors="replace")
    assert os.waitstatus_to_exitcode(wait_status) == 0, output
    assert "ONBOARD_RAN" not in output
    assert "Launching opensre onboard" not in output


def test_install_sh_auto_onboarding_noops_without_tty() -> None:
    # stdin is redirected from /dev/null so the gate is exercised deterministically
    # regardless of how the test runner's own stdin is wired.
    result = _run_logging_snippet(
        """
        INSTALL_DIR="/tmp"
        BIN_NAME="opensre"
        launch_onboarding_after_install </dev/null
        """
    )

    assert result.returncode == 0, result.stderr
    assert "Launching opensre onboard" not in result.stdout + result.stderr


def test_install_sh_has_step_for_explicit_version_fetch() -> None:
    result = _run_release_metadata_step(version="2026.4.29")

    assert result.returncode == 0, result.stderr
    assert "[1/6] Fetching release metadata for v2026.4.29" in result.stdout


def test_install_sh_defaults_to_main_build_channel() -> None:
    source = INSTALL_SH.read_text()

    assert 'INSTALL_CHANNEL="${OPENSRE_INSTALL_CHANNEL:-main}"' in source
    assert 'MAIN_RELEASE_TAG="${OPENSRE_MAIN_RELEASE_TAG:-main-build}"' in source
    assert "releases/tags/${MAIN_RELEASE_TAG}" in source
    assert "releases/tags/nightly" not in source


def test_install_sh_defines_progress_helpers() -> None:
    source = INSTALL_SH.read_text()

    for helper in (
        "is_interactive_terminal()",
        "terminal_supports_unicode()",
        "terminal_columns()",
        "truncate_text()",
        "friendly_progress_label()",
        "print_installer_header()",
        "progress_frame()",
        "draw_progress()",
        "finish_progress()",
        "run_with_progress()",
        "capture_with_progress()",
        "binary_app_root()",
        "install_binary_app()",
        "print_binary_diagnostics()",
    ):
        assert helper in source

    assert "OPENSRE_INSTALL_VERBOSE" in source
    assert "\\033[?25h" in source
    assert 'trap \'kill "$command_pid"' in source
    assert "\\033[2J" not in source
    assert "preparing installer" not in source


def test_install_sh_draw_progress_fits_terminal_width_with_long_labels() -> None:
    long_checksum = (
        "[4/6] Downloading and verifying checksum (opensre_main_darwin-arm64.tar.gz.sha256)"
    )
    result = _run_logging_snippet(
        f"""
        terminal_columns() {{ printf '60\\n'; }}
        terminal_supports_unicode() {{ return 1; }}
        draw_progress {shlex.quote(long_checksum)} 9
        """
    )
    output = result.stdout + result.stderr
    visible_segments = [
        _visible_terminal_text(segment) for segment in re.split(r"[\r\n]", output) if segment
    ]

    assert result.returncode == 0, result.stderr
    assert visible_segments
    assert all(len(segment) <= 60 for segment in visible_segments)
    assert "verifying checksum" in visible_segments[-1]
    assert "opensre_main_darwin-arm64" not in visible_segments[-1]


def test_install_sh_animated_repaints_do_not_wrap_or_leave_long_label_residue() -> None:
    long_checksum = (
        "[4/6] Downloading and verifying checksum (opensre_main_darwin-arm64.tar.gz.sha256)"
    )
    result = _run_logging_snippet(
        f"""
        is_interactive_terminal() {{ return 0; }}
        terminal_columns() {{ printf '56\\n'; }}
        terminal_supports_unicode() {{ return 1; }}
        run_with_progress {shlex.quote(long_checksum)} bash -c 'sleep 0.25'
        """
    )
    output = result.stdout + result.stderr
    animated_segments = [
        _visible_terminal_text(segment)
        for segment in re.split(r"[\r\n]", output)
        if "Installing OpenSRE" in _visible_terminal_text(segment)
    ]

    assert result.returncode == 0, result.stderr
    assert animated_segments
    assert all(len(segment) <= 56 for segment in animated_segments)
    assert all("opensre_main_darwin-arm64" not in segment for segment in animated_segments)


def test_install_sh_header_is_stable_without_intro_animation() -> None:
    result = _run_logging_snippet(
        """
        is_interactive_terminal() { return 0; }
        print_installer_header
        """
    )
    output = result.stdout + result.stderr

    assert result.returncode == 0, result.stderr
    assert "OpenSRE Installer" in output
    assert "Installing the OpenSRE CLI" in output
    assert "preparing installer" not in output
    assert "\x1b[2J" not in output


def test_install_sh_progress_plain_when_not_tty() -> None:
    result = _run_logging_snippet(
        """
        run_with_progress "Plain progress step" bash -c 'printf "work complete\\\\n"'
        """
    )
    output = result.stdout + result.stderr

    assert result.returncode == 0, result.stderr
    assert "Plain progress step" in output
    assert "work complete" in output
    assert "\x1b[" not in output
    assert "\r" not in output


def test_install_sh_capture_with_progress_keeps_stdout_value_clean() -> None:
    result = _run_logging_snippet(
        """
        is_interactive_terminal() { return 0; }
        terminal_supports_unicode() { return 1; }
        capture_with_progress captured_value "Capture value" bash -c 'printf "release-json"'
        printf '\\nRESULT:%s\\n' "$captured_value"
        """
    )

    assert result.returncode == 0, result.stderr
    assert "RESULT:release-json" in result.stdout
    assert "RESULT:Capture value" not in result.stdout


def test_install_sh_capture_with_progress_preserves_failure_status_and_logs() -> None:
    result = _run_logging_snippet(
        """
        if capture_with_progress captured_value "Failing capture step" bash -c 'echo hidden-out; echo hidden-err >&2; exit 7'; then
            exit 99
        else
            progress_status=$?
        fi
        exit "$progress_status"
        """
    )
    output = result.stdout + result.stderr

    assert result.returncode == 7
    assert "Failing capture step" in output
    assert "hidden-out" in output
    assert "hidden-err" in output


def test_install_sh_run_with_progress_prints_captured_logs_on_failure() -> None:
    result = _run_logging_snippet(
        """
        is_interactive_terminal() { return 0; }
        terminal_supports_unicode() { return 1; }
        if run_with_progress "Failing progress step" bash -c 'echo hidden-out; echo hidden-err >&2; exit 7'; then
            exit 99
        else
            progress_status=$?
        fi
        exit "$progress_status"
        """
    )
    output = result.stdout + result.stderr

    assert result.returncode == 7
    assert "Failing progress step failed" in output
    assert "hidden-out" in output
    assert "hidden-err" in output


def test_install_sh_verify_binary_failure_includes_diagnostics(tmp_path: Path) -> None:
    fake_binary = tmp_path / "opensre"
    fake_binary.write_text("#!/usr/bin/env sh\nexit 42\n", encoding="utf-8")
    fake_binary.chmod(0o755)

    result = _run_logging_snippet(
        f"""
        platform="linux"
        verify_binary_version {shlex.quote(str(fake_binary))}
        """
    )
    output = result.stdout + result.stderr

    assert result.returncode == 1
    assert "Failed to execute opensre --version (exit 42)." in output
    assert "Command output: <empty>" in output
    assert "Binary diagnostics:" in output
    assert str(fake_binary) in output


def test_install_sh_installs_pyinstaller_onedir_app(tmp_path: Path) -> None:
    app_root = tmp_path / "opensre-app"
    app_root.mkdir()
    app_binary = app_root / "opensre"
    app_binary.write_text("#!/usr/bin/env sh\nprintf 'opensre test\\n'\n", encoding="utf-8")
    app_binary.chmod(0o755)
    internal = app_root / "_internal"
    internal.mkdir()
    (internal / "payload.txt").write_text("bundled", encoding="utf-8")
    install_dir = tmp_path / "bin"
    destination = install_dir / "opensre"

    result = _run_logging_snippet(
        f"""
        platform="linux"
        BIN_NAME="opensre"
        INSTALL_DIR={shlex.quote(str(install_dir))}
        install_verified_binary {shlex.quote(str(app_binary))} {shlex.quote(str(destination))}
        test -L {shlex.quote(str(destination))}
        test -x {shlex.quote(str(destination))}
        test -f {shlex.quote(str(install_dir / ".opensre-app" / "_internal" / "payload.txt"))}
        {shlex.quote(str(destination))}
        """
    )

    assert result.returncode == 0, result.stderr
    assert "opensre test" in result.stdout


def test_install_sh_uses_six_step_extract_verify_install_labels() -> None:
    source = INSTALL_SH.read_text()

    assert "[4/6] Downloading and verifying checksum" in source
    assert "[5/6] Extracting and verifying binary" in source
    assert "[6/6] Installing ${BIN_NAME} to ${INSTALL_DIR}" in source
    assert "[6/6] Extracting release archive" not in source
    assert 'capture_with_progress installed_version "Verifying installed binary"' not in source


def test_zsh_writes_export_to_zshrc(tmp_path: Path) -> None:
    result = _run(tmp_path, shell="/bin/zsh")
    assert result.returncode == 0, result.stderr
    zshrc = tmp_path / "home" / ".zshrc"
    assert zshrc.exists()
    assert f'export PATH="{tmp_path / "home" / _LOCAL_BIN}:$PATH"' in zshrc.read_text()


def test_bash_linux_writes_to_bashrc(tmp_path: Path) -> None:
    result = _run(tmp_path, shell="/bin/bash", platform="linux")
    assert result.returncode == 0, result.stderr
    bashrc = tmp_path / "home" / ".bashrc"
    assert bashrc.exists()
    assert _LOCAL_BIN in bashrc.read_text()


def test_bash_macos_writes_to_bash_profile(tmp_path: Path) -> None:
    result = _run(tmp_path, shell="/bin/bash", platform="darwin")
    assert result.returncode == 0, result.stderr
    bash_profile = tmp_path / "home" / ".bash_profile"
    assert bash_profile.exists()
    assert _LOCAL_BIN in bash_profile.read_text()


def test_fish_uses_fish_add_path(tmp_path: Path) -> None:
    result = _run(tmp_path, shell="/usr/bin/fish")
    assert result.returncode == 0, result.stderr
    fish_config = tmp_path / "home" / ".config" / "fish" / "config.fish"
    assert fish_config.exists()
    assert "fish_add_path" in fish_config.read_text()


def test_unknown_shell_prints_manual_instructions(tmp_path: Path) -> None:
    result = _run(tmp_path, shell="/bin/dash")
    assert result.returncode == 0, result.stderr
    home = tmp_path / "home"
    assert not (home / ".zshrc").exists()
    assert not (home / ".bashrc").exists()
    assert not (home / ".bash_profile").exists()
    assert "export PATH" in result.stdout or "export PATH" in result.stderr


def test_idempotent_no_duplicate_on_rerun(tmp_path: Path) -> None:
    _run(tmp_path, shell="/bin/zsh")
    _run(tmp_path, shell="/bin/zsh")
    content = (tmp_path / "home" / ".zshrc").read_text()
    export_lines = [ln for ln in content.splitlines() if _LOCAL_BIN in ln and "export PATH" in ln]
    assert len(export_lines) == 1


def test_skips_when_install_dir_already_in_rc(tmp_path: Path) -> None:
    home = tmp_path / "home"
    home.mkdir(exist_ok=True)
    idir = str(home / _LOCAL_BIN)
    zshrc = home / ".zshrc"
    zshrc.write_text(f'export PATH="$PATH:{idir}"\n')
    original = zshrc.read_text()

    result = _run(tmp_path, shell="/bin/zsh", install_dir=idir)
    assert result.returncode == 0, result.stderr
    assert zshrc.read_text() == original


def test_creates_rc_file_when_missing(tmp_path: Path) -> None:
    result = _run(tmp_path, shell="/bin/zsh")
    assert result.returncode == 0, result.stderr
    assert (tmp_path / "home" / ".zshrc").exists()


def test_marker_comment_present(tmp_path: Path) -> None:
    _run(tmp_path, shell="/bin/zsh")
    content = (tmp_path / "home" / ".zshrc").read_text()
    assert "# Added by opensre installer" in content


def test_post_install_message_mentions_source(tmp_path: Path) -> None:
    result = _run(tmp_path, shell="/bin/zsh")
    assert result.returncode == 0, result.stderr
    combined = result.stdout + result.stderr
    assert "source" in combined


def test_fish_creates_parent_dirs(tmp_path: Path) -> None:
    result = _run(tmp_path, shell="/usr/bin/fish")
    assert result.returncode == 0, result.stderr
    assert (tmp_path / "home" / ".config" / "fish" / "config.fish").exists()


def test_readds_export_when_marker_present_but_line_removed(tmp_path: Path) -> None:
    home = tmp_path / "home"
    home.mkdir(exist_ok=True)
    zshrc = home / ".zshrc"
    zshrc.write_text("# Added by opensre installer\n")

    result = _run(tmp_path, shell="/bin/zsh")
    assert result.returncode == 0, result.stderr
    content = zshrc.read_text()
    assert _LOCAL_BIN in content


# ---------------------------------------------------------------------------
# Helpers and tests for the post-install onboarding hint (issue #1153)
# ---------------------------------------------------------------------------


def _run_post_install(
    tmp_path: Path,
    shell: str,
    platform: str = "linux",
    install_channel: str = "release",
    installed_version: str = "2026.4.1",
    dir_already_on_path: bool = False,
) -> subprocess.CompletedProcess[str]:
    """Run the real post-install function from install.sh with side-effects stubbed.

    Unlike ``_run()``, which only calls ``configure_path()`` in isolation, this
    helper calls ``finish_install()`` from install.sh (version print +
    configure_path + onboarding hint) rather than copying those lines into the
    test.  That means if the hint is removed from install.sh the assertions will
    correctly fail — there is no tautology.

    The approach:
      1. Load all function definitions from install.sh via awk.
      2. Set every shell variable the post-install function needs.
      3. Call the real post-install function.
    """
    fake_home = tmp_path / "home"
    fake_home.mkdir(exist_ok=True)
    idir = str(fake_home / _LOCAL_BIN)

    # When dir_already_on_path=True, configure_path() hits the early return
    # and prints nothing.  The onboarding hint must still appear.
    path_value = f"{idir}:/usr/bin:/bin" if dir_already_on_path else "/usr/bin:/bin"

    install_sh = _INSTALL_SH_SHELL
    idir_shell = shlex.quote(idir)
    home_shell = shlex.quote(str(fake_home))

    script = textwrap.dedent(f"""\
        # 1. Load every function definition from install.sh
        eval "$(awk '
            /^[a-z_][a-z_]*\\(\\)/ {{ in_fn=1 }}
            in_fn {{ print }}
            in_fn && /^\\}}$/ {{ in_fn=0 }}
        ' {install_sh})"

        # 2. Set every variable the post-install function reads
        BIN_NAME="opensre"
        INSTALL_DIR={idir_shell}
        INSTALL_CHANNEL="{install_channel}"
        installed_version="{installed_version}"
        platform="{platform}"
        HOME={home_shell}
        SHELL="{shell}"
        PATH="{path_value}"
        export HOME SHELL PATH

        # 3. Execute the real post-install function from install.sh.
        finish_install
    """)
    return subprocess.run(["bash", "-c", script], capture_output=True, text=True)


def test_install_sh_contains_onboarding_hint() -> None:
    """Contract test: the hint string must be present in install.sh source.

    This is a direct grep of the script file — independent of any subprocess
    execution — so it will fail immediately if the hint is removed from
    install.sh even if the subprocess-based tests are somehow still passing.
    """
    source = INSTALL_SH.read_text()
    assert "${BIN_NAME:-opensre} onboard" in source, (
        "install.sh does not contain the onboarding hint "
        "(expected ``${BIN_NAME:-opensre} onboard`` in Next steps output)."
    )


def test_install_ps1_contains_onboarding_hint() -> None:
    """Contract test: the hint string must be present in install.ps1 source."""
    install_ps1 = Path(__file__).parents[2] / "install.ps1"
    source = install_ps1.read_text()
    assert "$exe onboard" in source, (
        "install.ps1 does not contain the onboarding step "
        '(expected a line with ``$exe onboard``, e.g. ``Write-Host "  1. Run  $exe onboard"``).'
    )


def test_onboarding_hint_shown_when_path_not_set(tmp_path: Path) -> None:
    """Hint appears on a first install where configure_path writes the rc file."""
    result = _run_post_install(tmp_path, shell="/bin/zsh", dir_already_on_path=False)
    assert result.returncode == 0, result.stderr
    assert "opensre onboard" in result.stdout + result.stderr


def test_onboarding_hint_shown_when_path_already_set(tmp_path: Path) -> None:
    """Hint appears even when configure_path returns early (install dir already on PATH).

    This is the silent-upgrade scenario that the old configure_path-only
    helper could never cover: configure_path() hits the early return at
    line 490 and outputs nothing, yet the user must still see the hint.
    """
    result = _run_post_install(tmp_path, shell="/bin/zsh", dir_already_on_path=True)
    assert result.returncode == 0, result.stderr
    assert "opensre onboard" in result.stdout + result.stderr


def test_onboarding_hint_shown_for_bash_linux(tmp_path: Path) -> None:
    """Hint appears on bash/linux installs."""
    result = _run_post_install(tmp_path, shell="/bin/bash", platform="linux")
    assert result.returncode == 0, result.stderr
    assert "opensre onboard" in result.stdout + result.stderr


def test_onboarding_hint_shown_for_main_channel(tmp_path: Path) -> None:
    """Hint appears when installing the rolling main build (not a versioned release)."""
    result = _run_post_install(
        tmp_path,
        shell="/bin/zsh",
        install_channel="main",
        installed_version="main",
    )
    assert result.returncode == 0, result.stderr
    assert "opensre onboard" in result.stdout + result.stderr


def _run_ensure_on_path(
    tmp_path: Path, path_dirs: list[str], platform: str = "linux"
) -> tuple[subprocess.CompletedProcess[str], Path]:
    """Call the real ensure_on_path() with INSTALL_DIR off PATH.

    ``path_dirs`` becomes the PATH visible to the function; the returned Path
    is the populated install dir (never on that PATH).
    """
    install_dir = tmp_path / "install-dir"
    install_dir.mkdir()
    binary = install_dir / "opensre"
    binary.write_text("#!/usr/bin/env bash\necho opensre-ok\n")
    binary.chmod(0o755)

    path_value = ":".join([*path_dirs, "/usr/bin", "/bin"])
    script = textwrap.dedent(f"""\
        eval "$(awk '
            /^[a-z_][a-z_]*\\(\\)/ {{ in_fn=1 }}
            in_fn {{ print }}
            in_fn && /^\\}}$/ {{ in_fn=0 }}
        ' {_INSTALL_SH_SHELL})"
        log()  {{ printf '%s\\n' "$*"; }}
        warn() {{ printf 'Warning: %s\\n' "$*" >&2; }}
        success() {{ printf 'Success: %s\\n' "$*"; }}
        INSTALL_DIR={shlex.quote(str(install_dir))}
        BIN_NAME="opensre"
        platform="{platform}"
        HOME={shlex.quote(str(tmp_path / "home"))}
        SHELL="/bin/zsh"
        PATH={shlex.quote(path_value)}
        export HOME SHELL PATH
        mkdir -p "$HOME"
        ensure_on_path
    """)
    completed = subprocess.run(["bash", "-c", script], capture_output=True, text=True, cwd=tmp_path)
    return completed, install_dir


def test_ensure_on_path_links_into_writable_path_dir(tmp_path: Path) -> None:
    """A writable dir already on PATH gets a symlink, so `opensre` works in
    the current terminal immediately — no sudo, no rc-file edit needed."""
    writable_dir = tmp_path / "on-path-bin"
    writable_dir.mkdir()

    result, install_dir = _run_ensure_on_path(tmp_path, [str(writable_dir)])

    assert result.returncode == 0, result.stderr
    link = writable_dir / "opensre"
    assert link.is_symlink()
    assert link.resolve() == (install_dir / "opensre").resolve()
    assert "Linked opensre into" in result.stdout
    assert not (tmp_path / "home" / ".zshrc").exists()


def test_ensure_on_path_falls_back_to_rc_update_without_writable_dir(tmp_path: Path) -> None:
    """With no writable dir on PATH, the shell rc fallback still runs."""
    result, _ = _run_ensure_on_path(tmp_path, [])

    assert result.returncode == 0, result.stderr
    zshrc = tmp_path / "home" / ".zshrc"
    assert zshrc.exists()
    assert "install-dir" in zshrc.read_text()


def test_ensure_on_path_ignores_relative_path_entries(tmp_path: Path) -> None:
    """Relative PATH entries (e.g. ``.``) must never receive the symlink."""
    result, _ = _run_ensure_on_path(tmp_path, ["."])

    assert result.returncode == 0, result.stderr
    assert not (tmp_path / "opensre").exists()
    assert (tmp_path / "home" / ".zshrc").exists()


def test_onboarding_hint_appears_after_version_line(tmp_path: Path) -> None:
    """The onboarding hint must appear AFTER the 'Installed opensre v...' line."""
    result = _run_post_install(tmp_path, shell="/bin/zsh", installed_version="2026.4.1")
    assert result.returncode == 0, result.stderr
    output = result.stdout + result.stderr
    installed_pos = output.find("Installed opensre")
    onboard_pos = output.find("opensre onboard")
    assert installed_pos != -1, "'Installed opensre' line missing from output"
    assert onboard_pos != -1, "'opensre onboard' hint missing from output"
    assert onboard_pos > installed_pos, (
        "Onboarding hint must come after the install confirmation line"
    )