"""build_update_command: the matrix-bridge update one-liner.

Pure string assembly, no cluster. Locks in the contract from
docs/spark-control-integration.md (matrix-bridge repo): fetch, hard-reset to the
release branch, then rebuild/recreate via docker compose — chained with `&&` so
any failure (e.g. Gitea unreachable) aborts before the build and surfaces a
non-zero exit. The clone dir must stay unquoted so a `~` expands server-side.
"""
from app.matrix_bridge import build_update_command, _phase_for


def test_command_is_the_contract_chain():
    cmd = build_update_command("~/matrix-bridge", "master")
    assert cmd == (
        "cd ~/matrix-bridge && "
        "git fetch origin && "
        "git reset --hard origin/master && "
        "docker compose up -d --build"
    )


def test_fail_loud_chaining():
    # Every step is &&-chained: a failed fetch never reaches the build.
    cmd = build_update_command("~/matrix-bridge", "master")
    assert "; " not in cmd
    assert cmd.count(" && ") == 3
    assert cmd.index("git fetch") < cmd.index("git reset") < cmd.index("docker compose")


def test_tilde_dir_left_unquoted_for_server_side_expansion():
    cmd = build_update_command("~/matrix-bridge", "master")
    assert "cd ~/matrix-bridge &&" in cmd
    assert "'~" not in cmd  # quoting would defeat the home-dir expansion


def test_absolute_dir_and_custom_branch():
    cmd = build_update_command("/home/modelo/matrix-bridge", "phase-1")
    assert cmd.startswith("cd /home/modelo/matrix-bridge && ")
    assert "git reset --hard origin/phase-1 &&" in cmd


def test_phase_detection_maps_known_lines():
    assert _phase_for("HEAD is now at 1a2b3c4 some commit") == "Resetting to the latest release…"
    assert _phase_for("#5 building image") == "Building the bot image…"
    assert _phase_for("Container matrix-bridge  Recreate") == "Recreating the container…"
    assert _phase_for("Already up to date.") == "No new code; rebuilding…"
    assert _phase_for("some unremarkable line") is None