#!/usr/bin/env bash
#
# standards-touched-selftest.sh — the plan builds what a change can affect, and fails
# toward building.
#
# Builds a scratch repository shaped like this one (a workflow with three workspaces,
# one depending on another by path, one reading a file outside its area) and asserts
# what standards-touched.py decides for each kind of change.
set -uo pipefail
here=$(cd "$(dirname "$0")" && pwd)
tmp=$(mktemp -d)
trap 'rm -rf "$tmp"' EXIT
cd "$tmp"
git init -q && git config user.email t@example.invalid && git config user.name t
mkdir -p .github/workflows scripts a/a-rs/src b/b-rs/src c/c-rs/src shared
cp "$here/standards-touched.py" scripts/
cat > .github/workflows/standards-build.yml <<'W'
jobs:
  plan:
    env:
      WORKSPACES: |
          - { name: a-rs, dir: a/a-rs, runner: linux }
          - { name: b-rs, dir: b/b-rs, runner: linux-arm64, z3: true }
          - { name: c-rs, dir: c/c-rs, runner: macos, feature_tests: "-p x --features y,z" }
W
printf '[package]\nname="a"\n[dependencies]\nb = { path = "../../b/b-rs" }\n' > a/a-rs/Cargo.toml
printf '[package]\nname="b"\n' > b/b-rs/Cargo.toml
printf '[package]\nname="c"\n' > c/c-rs/Cargo.toml
printf 'const D: &str = include_str!("../../../shared/data.txt");\n' > c/c-rs/src/lib.rs
: > a/a-rs/src/lib.rs; : > b/b-rs/src/lib.rs; echo one > shared/data.txt; echo x > README.md
git add -A && git commit -qm base && base=$(git rev-parse HEAD)

fails=0
expect() { # expect <what> <expected run list, comma-separated, sorted>
  local what=$1 want=$2 got
  head=$(git rev-parse HEAD)
  got=$(python3 -I scripts/standards-touched.py "$base" "$head" | python3 -c 'import json,sys; print(",".join(sorted(json.load(sys.stdin)["run"])))')
  if [ "$got" = "$want" ]; then echo "ok    $what: runs [$got]"; else echo "FAIL  $what: runs [$got], expected [$want]"; fails=$((fails+1)); fi
  git reset -q --hard "$base"
}
echo y >> README.md && git commit -qam readme;                 expect "a file in no area" ""
echo y >> b/b-rs/src/lib.rs && git commit -qam b;              expect "b's area, which a depends on by path" "a-rs,b-rs"
echo y >> a/a-rs/src/lib.rs && git commit -qam a;              expect "a's own area" "a-rs"
echo y >> shared/data.txt && git commit -qam shared;           expect "a file c's sources include" "c-rs"
echo y >> .github/workflows/standards-build.yml && git commit -qam wf; expect "the workflow itself" "a-rs,b-rs,c-rs"
echo y >> scripts/standards-touched.py && git commit -qam script;     expect "the planning script" "a-rs,b-rs,c-rs"
got=$(python3 -I scripts/standards-touched.py "" "" | python3 -c 'import json,sys; print(",".join(sorted(json.load(sys.stdin)["run"])))')
[ "$got" = "a-rs,b-rs,c-rs" ] && echo "ok    no pull request (a push): runs everything" || { echo "FAIL  a push ran [$got]"; fails=$((fails+1)); }
got=$(python3 -I scripts/standards-touched.py "$base" "0000000000000000000000000000000000000bad" 2>/dev/null | python3 -c 'import json,sys; print(",".join(sorted(json.load(sys.stdin)["run"])))')
[ "$got" = "a-rs,b-rs,c-rs" ] && echo "ok    a diff it cannot compute: runs everything" || { echo "FAIL  an unknown head ran [$got]"; fails=$((fails+1)); }
out=$(GITHUB_OUTPUT="$tmp/out" python3 -I scripts/standards-touched.py --github-output "" "" >/dev/null; cat "$tmp/out")
grep -q '"z3":true' <<<"$out" && grep -q '"feature_tests":"-p x --features y,z"' <<<"$out" && grep -q '^energy=false$' <<<"$out" \
  && echo "ok    the matrix entries keep their booleans and quoted values" || { echo "FAIL  the emitted matrix: $out"; fails=$((fails+1)); }
if [ $fails -ne 0 ]; then echo "standards-touched-selftest: $fails failure(s)"; exit 1; fi
echo "standards-touched-selftest: the plan builds what a change can affect, and everything when unsure."