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#!/usr/bin/env bats
# hooks/ai-wrap-teardown.sh — Stop hook that tears down the ai-term session
# (or powers off) after a wrap-up, gated on a sentinel wrap-it-up drops. On a
# normal stop (no sentinel) it is a silent no-op. The emacsclient call is
# stubbed here so the test records the elisp form without a live daemon.

setup() {
    REPO_ROOT="$(cd "$(dirname "$BATS_TEST_FILENAME")/../.." && pwd)"
    SCRIPT="$REPO_ROOT/hooks/ai-wrap-teardown.sh"
    GATE="$REPO_ROOT/claude-templates/bin/git-worktree-gate"
    TMPDIR_T="$(mktemp -d)"
    PROJ="proj-$$-$BATS_TEST_NUMBER"          # unique so /tmp sentinels don't collide
    CWD="$TMPDIR_T/$PROJ"
    mkdir -p "$CWD"
    git init -q "$CWD"
    git -C "$CWD" config user.email test@example.com
    git -C "$CWD" config user.name tester
    printf 'base\n' >"$CWD/tracked"
    git -C "$CWD" add tracked
    git -C "$CWD" commit -qm init
    bash "$GATE" certify "$CWD"
    TEARDOWN_SENTINEL="/tmp/ai-wrap-teardown-${PROJ}"
    SHUTDOWN_SENTINEL="/tmp/ai-wrap-shutdown-${PROJ}"

    # Stub emacsclient on PATH: record the elisp form it was called with.
    BIN="$TMPDIR_T/bin"
    mkdir -p "$BIN"
    EC_LOG="$TMPDIR_T/emacsclient.log"
    cat >"$BIN/emacsclient" <<EOF
#!/usr/bin/env bash
# args: -e <form>
shift   # drop -e
printf '%s\n' "\$1" >> "$EC_LOG"
EOF
    chmod +x "$BIN/emacsclient"
}

teardown() {
    rm -rf "$TMPDIR_T"
    rm -f "$TEARDOWN_SENTINEL" "$SHUTDOWN_SENTINEL"
}

run_hook() {
    # invoke with the stubbed emacsclient on PATH, feeding Stop-hook JSON
    printf '{"cwd":"%s","hook_event_name":"Stop"}' "$CWD" \
        | GIT_WORKTREE_GATE="$GATE" PATH="$BIN:$PATH" bash "$SCRIPT"
}

@test "no sentinel: silent no-op, emacsclient never called" {
    run run_hook
    [ "$status" -eq 0 ]
    [ -z "$output" ]
    [ ! -f "$EC_LOG" ]
}

@test "teardown sentinel: calls cj/ai-term-quit with the project basename" {
    : > "$TEARDOWN_SENTINEL"
    run run_hook
    [ "$status" -eq 0 ]
    grep -q "cj/ai-term-quit \"$PROJ\"" "$EC_LOG"
}

@test "teardown sentinel is removed after firing" {
    : > "$TEARDOWN_SENTINEL"
    run run_hook
    [ "$status" -eq 0 ]
    [ ! -f "$TEARDOWN_SENTINEL" ]
}

@test "shutdown sentinel: calls cj/ai-term-shutdown-countdown" {
    : > "$SHUTDOWN_SENTINEL"
    run run_hook
    [ "$status" -eq 0 ]
    grep -q "cj/ai-term-shutdown-countdown" "$EC_LOG"
}

@test "shutdown supersedes teardown when both sentinels exist" {
    : > "$TEARDOWN_SENTINEL"
    : > "$SHUTDOWN_SENTINEL"
    run run_hook
    [ "$status" -eq 0 ]
    grep -q "cj/ai-term-shutdown-countdown" "$EC_LOG"
    ! grep -q "cj/ai-term-quit" "$EC_LOG"
    [ ! -f "$TEARDOWN_SENTINEL" ]
    [ ! -f "$SHUTDOWN_SENTINEL" ]
}

@test "emacsclient absent: clears the sentinel and exits 0 (graceful)" {
    : > "$TEARDOWN_SENTINEL"
    status=0
    output="$(printf '{"cwd":"%s","hook_event_name":"Stop"}' "$CWD" \
        | GIT_WORKTREE_GATE="$GATE" PATH="/usr/bin:/bin" bash "$SCRIPT")" || status=$?
    [ "$status" -eq 0 ]
    [ ! -f "$TEARDOWN_SENTINEL" ]
}

@test "falls back to PWD basename when cwd is absent from JSON" {
    # No cwd key: hook uses $PWD. Run from CWD so basename resolves to PROJ.
    : > "$TEARDOWN_SENTINEL"
    run env "GIT_WORKTREE_GATE=$GATE" "PATH=$BIN:$PATH" \
        bash -c "cd '$CWD' && printf '{}' | bash '$SCRIPT'"
    [ "$status" -eq 0 ]
    grep -q "cj/ai-term-quit \"$PROJ\"" "$EC_LOG"
}

@test "emits no stderr noise on a normal stop" {
    err="$(printf '{"cwd":"%s","hook_event_name":"Stop"}' "$CWD" \
        | GIT_WORKTREE_GATE="$GATE" PATH="$BIN:$PATH" bash "$SCRIPT" 2>&1 >/dev/null)"
    [ -z "$err" ]
}

@test "dirty worktree blocks teardown, preserves sentinel, and names the path" {
    printf 'late\n' >>"$CWD/tracked"
    : >"$TEARDOWN_SENTINEL"
    run run_hook
    [ "$status" -eq 0 ]
    echo "$output" | jq -e '.decision == "block"'
    echo "$output" | jq -e '.reason | test("tracked")'
    [ -f "$TEARDOWN_SENTINEL" ]
    [ ! -f "$EC_LOG" ]
}

@test "changed HEAD after certification blocks teardown" {
    git -C "$CWD" commit -q --allow-empty -m later
    : >"$TEARDOWN_SENTINEL"
    run run_hook
    echo "$output" | jq -e '.reason | test("HEAD changed")'
    [ -f "$TEARDOWN_SENTINEL" ]
    [ ! -f "$EC_LOG" ]
}

@test "missing certificate blocks teardown" {
    rm -f "$(git -C "$CWD" rev-parse --absolute-git-dir)/ai-wrap-clean"
    : >"$TEARDOWN_SENTINEL"
    run run_hook
    echo "$output" | jq -e '.reason | test("no clean-tree certificate")'
    [ -f "$TEARDOWN_SENTINEL" ]
}

@test "Codex payload receives continue false and a stop reason" {
    printf 'late\n' >>"$CWD/tracked"
    : >"$TEARDOWN_SENTINEL"
    run bash -c \
        "printf '{\"cwd\":\"$CWD\",\"hook_event_name\":\"Stop\",\"model\":\"gpt-test\"}' \
         | GIT_WORKTREE_GATE='$GATE' PATH='$BIN:$PATH' bash '$SCRIPT'"
    [ "$status" -eq 0 ]
    echo "$output" | jq -e '.continue == false'
    echo "$output" | jq -e '.stopReason | test("tracked")'
    [ -f "$TEARDOWN_SENTINEL" ]
}

@test "successful teardown consumes the clean-tree certificate" {
    : >"$TEARDOWN_SENTINEL"
    cert="$(git -C "$CWD" rev-parse --absolute-git-dir)/ai-wrap-clean"
    [ -f "$cert" ]
    run run_hook
    [ "$status" -eq 0 ]
    [ ! -f "$cert" ]
}