#!/usr/bin/env bash
# ka-build test suite — dry-run paths only.
#
# Phase-1 deliverable per issue #34. The full makepkg path is exercised
# manually on boltzmann (parity test against the most recent hand-built
# linux-fresnel-fourier pkg); not in this suite because:
#   - Needs real ssh to boltzmann + ~30 min build wall time
#   - Hermetic sandbox would need a mock marfrit-publish-arch on hertz
# Future-work: add a `--mock-build-host` flag + fixture builder so this
# can run in CI.
#
# What this suite covers:
#   - Argument parsing + required-host check
#   - manifest.yaml read + package.name / build_host.primary extraction
#   - Refuses if manifest.lock missing (ka-promote not run)
#   - Refuses if PKGBUILD missing
#   - Refuses on patch drift between kernel-agent and marfrit-packages
#   - Happy-path dry-run on fresnel (all 6 patches match)

set -euo pipefail

repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
packages_repo="${PACKAGES_REPO_FOR_TESTS:-${HOME}/src/marfrit-packages}"

pass=0
fail=0
results=()
note() { printf '  %s\n' "$*"; }
ok()   { results+=("PASS  $1"); pass=$((pass+1)); note "PASS"; }
ko()   { results+=("FAIL  $1: $2"); fail=$((fail+1)); note "FAIL: $2"; }

# Reset build/ before running so we exercise the "no manifest.lock yet" path
rm -rf "$repo_root/build/fresnel"

echo
echo "Running ka-build test suite from $repo_root"
echo

# ----- 1. requires host arg -----
echo "::: requires host arg"
set +e
out=$("$repo_root/bin/ka-build" 2>&1)
rc=$?
set -e
if [ "$rc" -eq 2 ] && echo "$out" | grep -q "host is required"; then ok "requires host arg"; else ko "requires host arg" "exit=$rc out=$out"; fi

# ----- 2. unknown flag -----
echo "::: unknown flag rejected"
set +e
out=$("$repo_root/bin/ka-build" fresnel --nonsense 2>&1)
rc=$?
set -e
if [ "$rc" -ne 0 ] && echo "$out" | grep -q "unknown flag"; then ok "unknown flag rejected"; else ko "unknown flag rejected" "exit=$rc out=$out"; fi

# ----- 3. refuses if manifest.lock missing -----
echo "::: refuses if manifest.lock missing (ka-promote not run)"
set +e
out=$("$repo_root/bin/ka-build" fresnel --dry-run --packages-repo "$packages_repo" 2>&1)
rc=$?
set -e
if [ "$rc" -eq 2 ] && echo "$out" | grep -q "no manifest.lock"; then ok "refuses no-lock"; else ko "refuses no-lock" "exit=$rc out=$out"; fi

# Now run ka-promote so the rest can proceed
"$repo_root/bin/ka-promote" fresnel >/dev/null

# ----- 4. refuses if PKGBUILD missing -----
echo "::: refuses if PKGBUILD missing (--packages-repo wrong)"
set +e
out=$("$repo_root/bin/ka-build" fresnel --dry-run --packages-repo /tmp/non-existent-mp 2>&1)
rc=$?
set -e
if [ "$rc" -eq 2 ]; then ok "refuses bad packages-repo"; else ko "refuses bad packages-repo" "exit=$rc out=$out"; fi

# ----- 5. happy-path dry-run -----
echo "::: happy-path dry-run (fresnel, real packages-repo)"
if [ ! -f "$packages_repo/arch/linux-fresnel-fourier/PKGBUILD" ]; then
    note "SKIP: $packages_repo/arch/linux-fresnel-fourier/PKGBUILD not present"
    results+=("SKIP  happy-path dry-run (PKGBUILD missing locally)")
else
    set +e
    out=$("$repo_root/bin/ka-build" fresnel --dry-run --packages-repo "$packages_repo" 2>&1)
    rc=$?
    set -e
    if [ "$rc" -eq 0 ] && echo "$out" | grep -q "patches OK (6 files)"; then ok "happy-path dry-run"; else ko "happy-path dry-run" "exit=$rc out=$out"; fi
fi

# ----- 6. patch drift detection -----
echo "::: patch drift detection (mutate a copied patch, expect exit 3)"
if [ ! -d "$packages_repo/arch/linux-fresnel-fourier" ]; then
    note "SKIP: $packages_repo/arch/linux-fresnel-fourier not present"
    results+=("SKIP  patch drift detection")
else
    sandbox=$(mktemp -d -t ka-build-drift.XXXXXX)
    cp -r "$packages_repo/arch/linux-fresnel-fourier" "$sandbox/linux-fresnel-fourier"
    mkdir -p "$sandbox/arch"
    mv "$sandbox/linux-fresnel-fourier" "$sandbox/arch/linux-fresnel-fourier"
    # Mutate one patch so its sha256 differs from manifest.lock's recorded sha
    echo "drift" >> "$sandbox/arch/linux-fresnel-fourier/0001-arm64-dts-rk3399-pinebook-pro-add-OC-OPP-tables-1704-2184.patch"
    set +e
    out=$("$repo_root/bin/ka-build" fresnel --dry-run --packages-repo "$sandbox" 2>&1)
    rc=$?
    set -e
    rm -rf "$sandbox"
    if [ "$rc" -eq 3 ] && echo "$out" | grep -q "DRIFT:"; then ok "patch drift detection"; else ko "patch drift detection" "exit=$rc out=$out"; fi
fi

echo
echo "===================="
printf '%s\n' "${results[@]}"
echo "===================="
echo "passed: $pass"
echo "failed: $fail"
[ "$fail" -eq 0 ] || exit 1