#!/usr/bin/env bash
# Regression: issue-close.sh must NOT close an issue when the closing comment could not
# be posted, and comment+close must be made by ONE principal.
#
# Guards two defects fixed together (see #1081):
#   1. `tea issue comment` is not a subcommand -- tea exposes comments as the TOP-LEVEL
#      `tea comment`. The old call always failed, was unchecked, and the issue closed
#      anyway, losing the record of WHY it was closed.
#   2. Routing the comment through the token-authenticated API helper while the close
#      used --login would attribute one operation to two principals.
#
# SAFETY (rev-974, #1085 review 130): this test previously ran under `set -uo pipefail`
# with unchecked mkdir/redirect/cd, then prepended a possibly-nonexistent $MOCK_BIN to
# PATH -- while `git remote add origin` names the REAL repository. Forcing setup failure
# with an unwritable AGENT_WORK_ROOT made it `git init` in its CALLER's directory and
# invoke the real, provider-mutating issue-close.sh. Setup now fails closed, and both
# `tea` and `curl` are asserted to resolve INSIDE $MOCK_BIN before any target run.
set -euo pipefail
# NOTE: with `set -e`, `grep -q X && fail "..."` is a trap -- the ABSENT case (grep rc=1,
# which is the PASSING case for a must-not-appear assertion) is the last command of an &&
# list and silently terminates the script with no message. Every must-not-appear check
# below is therefore an if-block. This is the same set -e + &&-list defect be-coder-08
# found in #1086, reintroduced here by adding `set -e` for the sandbox-safety fix.

WORK_ROOT="${AGENT_WORK_ROOT:-${TMPDIR:-/tmp}}"
SANDBOX="$WORK_ROOT/issue-close-fail-closed-test-$$"
MOCK_BIN="$SANDBOX/bin"; REPO_DIR="$SANDBOX/repo"; CALLS="$SANDBOX/calls.log"
cleanup() { rm -rf "$SANDBOX"; }
trap cleanup EXIT

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
TARGET="$SCRIPT_DIR/issue-close.sh"
[ -f "$TARGET" ] || { echo "FAIL: issue-close.sh not found beside this test"; exit 1; }
fail() { echo "FAIL: $*"; exit 1; }

# Every setup step is checked. Under `set -e` these abort; the explicit || fail keeps the
# reason legible instead of a bare non-zero exit.
mkdir -p "$MOCK_BIN" "$REPO_DIR" || fail "setup: cannot create sandbox under $WORK_ROOT"
: > "$CALLS"                     || fail "setup: cannot write calls log at $CALLS"
cd "$REPO_DIR"                   || fail "setup: cannot cd into $REPO_DIR"
git init -q                      || fail "setup: git init failed"
git remote add origin https://git.mosaicstack.dev/mosaicstack/stack.git || fail "setup: git remote add failed"
export PATH="$MOCK_BIN:$PATH" CALLS
export GITEA_URL="https://git.mosaicstack.dev"
export GITEA_TOKEN="redacted-test-token"

cat > "$MOCK_BIN/curl" <<'EOF'
#!/bin/bash
method=GET; url=""
while [ $# -gt 0 ]; do
    case "$1" in
        -X) method="$2"; shift 2 ;;
        http*|https*) url="$1"; shift ;;
        *) shift ;;
    esac
done
printf 'curl %s %s\n' "$method" "$url" >> "$CALLS"
[ "${MOCK_CURL_FAIL:-}" = "1" ] && [ "$method" = "POST" ] && exit 22
exit 0
EOF
chmod +x "$MOCK_BIN/curl"

mk_tea() {  # $1 = exit code for a comment attempt; $2 = login list (empty => no login)
    local rc="$1" login="${2-}"
    cat > "$MOCK_BIN/tea" <<EOF
#!/bin/bash
printf 'tea %s\n' "\$*" >> "$CALLS"
if [[ "\$*" == *"login list"* ]]; then
    printf '%s\n' '${login}'; exit 0
fi
# Fail ANY comment attempt -- both the correct top-level \`tea comment\` and the broken
# \`tea issue comment\` -- so an unfixed script exercises the DEFECT rather than tripping
# a setup assertion.
if [[ "\$1" == "comment" || ( "\$1" == "issue" && "\$2" == "comment" ) ]]; then exit $rc; fi
exit 0
EOF
    chmod +x "$MOCK_BIN/tea"
}
LOGIN_JSON='[{"name":"git.mosaicstack.dev","url":"https://git.mosaicstack.dev"}]'

# The mocks must be the ones that run. Without this, a failed setup silently falls through
# to the real tea/curl and the "test" mutates the real provider.
assert_mocked() {
    local w
    for w in tea curl; do
        p=$(command -v "$w" || true)
        [ -n "$p" ] || fail "SAFETY: $w does not resolve at all"
        case "$p" in
            "$MOCK_BIN"/*) : ;;
            *) fail "SAFETY: $w resolves to $p, OUTSIDE the sandbox -- refusing to invoke the target" ;;
        esac
    done
}

run_target() {  # never let a target failure abort the test; we assert on rc
    # Call sites MUST use `rc=0; run_target ... || rc=$?` -- a bare `run_target ...; rc=$?`
    # lets the non-zero RETURN trip set -e in the CALLER before rc is ever read.
    set +e; bash "$TARGET" "$@" >/dev/null 2>&1; local rc=$?; set -e; return $rc
}

# ── tea path ────────────────────────────────────────────────────────────────────────
# 1. NEGATIVE (the regression): comment fails => must NOT close, must exit non-zero
mk_tea 1 "$LOGIN_JSON"; : > "$CALLS"; assert_mocked
rc=0; run_target -i 42 -c "closing note" || rc=$?
grep -qE 'tea (issue )?comment' "$CALLS" || fail "no comment attempt -- setup did not reach the tea branch"
if grep -q 'tea issue close' "$CALLS"; then fail "ISSUE CLOSED AFTER THE COMMENT FAILED -- the regression"; fi
[ "$rc" -ne 0 ] || fail "comment failed but issue-close exited 0 -- FAIL-OPEN"

# 2. POSITIVE: comment succeeds => close proceeds, exit 0
mk_tea 0 "$LOGIN_JSON"; : > "$CALLS"; assert_mocked
rc=0; run_target -i 42 -c "closing note" || rc=$?
[ "$rc" -eq 0 ] || fail "comment succeeded but issue-close exited $rc"
grep -q 'tea issue close' "$CALLS" || fail "issue not closed even though the comment succeeded"

# 3. must use top-level `tea comment`, never `tea issue comment`
if grep -q 'tea issue comment' "$CALLS"; then fail "used 'tea issue comment' -- not a valid subcommand"; fi

# 4. ONE PRINCIPAL: comment and close must carry the SAME --login
c=$(grep -m1 '^tea comment'     "$CALLS" | grep -o -- '--login [^ ]*' | awk '{print $2}')
k=$(grep -m1 '^tea issue close' "$CALLS" | grep -o -- '--login [^ ]*' | awk '{print $2}')
[ -n "$c" ] || fail "comment carried no --login"
[ "$c" = "$k" ] || fail "MIXED PRINCIPALS: comment=$c close=$k"

# ── no-login / API fallback path ────────────────────────────────────────────────────
# rev-974: the delta also adds fail-closed behaviour to this branch, and the suite never
# reached it -- replacing the whole fallback contract with an unconditional close still
# passed. These assert the POSTCONDITION (which HTTP calls happened, in what order),
# not merely that a command ran.
# 5. no login + comment FAILS => POST attempted, NO PATCH, non-zero
mk_tea 0 ""; : > "$CALLS"; assert_mocked
rc=0; MOCK_CURL_FAIL=1 run_target -i 42 -c "closing note" || rc=$?
grep -q 'curl POST' "$CALLS" || fail "API path: no comment POST attempted"
if grep -q 'curl PATCH' "$CALLS"; then fail "API path: ISSUE CLOSED (PATCH) AFTER THE COMMENT POST FAILED"; fi
[ "$rc" -ne 0 ] || fail "API path: comment failed but exited 0 -- FAIL-OPEN"

# 6. no login + comment SUCCEEDS => POST strictly BEFORE PATCH, exit 0
mk_tea 0 ""; : > "$CALLS"; assert_mocked
rc=0; run_target -i 42 -c "closing note" || rc=$?
[ "$rc" -eq 0 ] || fail "API path: comment succeeded but exited $rc"
order=$(grep -oE 'curl (POST|PATCH)' "$CALLS" | awk '{print $2}' | paste -sd, -)
[ "$order" = "POST,PATCH" ] || fail "API path: expected POST,PATCH -- got '${order:-<none>}'"

# 7. no login + NO comment => PATCH only, never a POST
mk_tea 0 ""; : > "$CALLS"; assert_mocked
rc=0; run_target -i 42 || rc=$?
[ "$rc" -eq 0 ] || fail "API path: no-comment close exited $rc"
if grep -q 'curl POST' "$CALLS"; then fail "API path: posted a comment when none was requested"; fi
grep -q 'curl PATCH' "$CALLS" || fail "API path: issue not closed when no comment was requested"

echo "issue-close.sh fail-closed + single-principal regression passed"