#!/bin/bash
# Regression: detect_platform / get_repo_info must FAIL LOUDLY outside a git repo,
# not kill the caller silently.
#
# Both functions already contained the right error path:
#     if [[ -z "$remote_url" ]]; then echo "error: not a git repository..." >&2; return 1; fi
# but under `set -e` -- which every wrapper in this directory uses -- the preceding
# assignment `remote_url=$(git remote get-url origin 2>/dev/null)` returns git's 128
# outside a repo and terminates the CALLER first. The message was unreachable.
#
# Observed cost: pr-review.sh invoked from a non-repo cwd exits 128 with NO stdout and
# NO stderr, even when -r/--repo and -H/--host are supplied -- the flags documented as
# "skips git-remote inference". Two reviewer seats hit this and correctly reported
# `blocked` with no diagnostic to report.
#
# The control that matters is the LOUD one: asserting "rc != 0" passes on the broken
# build too, because 128 is also non-zero. The test must assert the MESSAGE.
set -uo pipefail
fail=0
HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
TMP="$(mktemp -d)"; trap 'rm -rf "$TMP"' EXIT

run_outside() { # $1=function name -> "rc:sawmessage"
    local fn="$1" out rc
    out=$( cd "$TMP" && bash -c "set -e; source '$HERE/detect-platform.sh'; $fn" 2>&1 ); rc=$?
    printf '%s:%s' "$rc" "$(grep -qi 'not a git repository' <<<"$out" && echo yes || echo no)"
}
check() { if [ "$2" = "$3" ]; then echo "  PASS  $1 ($2)"; else echo "  FAIL  $1: got $2, want $3"; fail=1; fi; }

# $TMP must not be inside a git repo. Do not SKIP on failure: be-coder-07 showed the
# original SKIP exited 0, so pointing TMPDIR beneath a git worktree made this test PASS
# against unchanged main. A skip that exits 0 is indistinguishable from a pass.
# GIT_CEILING_DIRECTORIES stops git walking above $TMP, making the condition hold
# regardless of where TMPDIR lives, rather than merely detecting when it does not.
# GIT_CEILING_DIRECTORIES is matched against the PHYSICAL path -- a symlinked TMPDIR
# (/tmp is commonly one) makes the logical path never match, and the ceiling silently
# does nothing. Resolve it before exporting.
TMP="$(cd "$TMP" && pwd -P)"
export GIT_CEILING_DIRECTORIES="$TMP"
if ( cd "$TMP" && git rev-parse --git-dir >/dev/null 2>&1 ); then
    echo "  FAIL  scratch dir is inside a git repo even with GIT_CEILING_DIRECTORIES set;"
    echo "        the outside-a-repo precondition cannot be established -- refusing to report a result"
    exit 1
fi

echo "== outside a git repo: rc=1 AND the diagnostic is emitted =="
check "detect_platform" "$(run_outside detect_platform)" "1:yes"
check "get_repo_info"   "$(run_outside get_repo_info)"   "1:yes"

echo "== inside a git repo the functions still work =="
git init -q "$TMP/repo" 2>/dev/null
git -C "$TMP/repo" remote add origin https://git.mosaicstack.dev/mosaicstack/stack.git 2>/dev/null
out=$( cd "$TMP/repo" && bash -c "set -e; source '$HERE/detect-platform.sh'; detect_platform" 2>&1 ); rc=$?
if [ "$rc" -eq 0 ] && grep -qi 'gitea' <<<"$out"; then echo "  PASS  detect_platform in-repo (rc=0, $out)"
else echo "  FAIL  detect_platform in-repo: rc=$rc out=$out"; fail=1; fi

[ "$fail" -eq 0 ] && echo "OK  detect-platform fails loudly outside a repo" || echo "FAILED"
exit "$fail"
