#!/usr/bin/env sh
set -eu

evidence_dir="target/release-evidence/backend"
runtime_output="$evidence_dir/runtime-backend-report.txt"
prototype_output="$evidence_dir/simd-prototype-equivalence.txt"
manifest="$evidence_dir/MANIFEST.txt"

mkdir -p "$evidence_dir"

echo "backend evidence: runtime report"
runtime_status=0
cargo test --test rfc4648 --all-features runtime_backend_report_matches_admission_state -- --nocapture >"$runtime_output" 2>&1 || runtime_status="$?"
cat "$runtime_output"

echo "backend evidence: SIMD prototype scalar-equivalence tests"
prototype_status=0
cargo test --all-features simd:: -- --nocapture >"$prototype_output" 2>&1 || prototype_status="$?"
cat "$prototype_output"

{
    echo "base64-ng backend evidence"
    echo
    echo "rustc:"
    rustc -Vv
    echo
    echo "cargo:"
    cargo -V
    echo
    echo "system:"
    if command -v uname >/dev/null 2>&1; then
        uname -a
    else
        echo "uname unavailable"
    fi
    echo
    echo "commands:"
    echo "cargo test --test rfc4648 --all-features runtime_backend_report_matches_admission_state -- --nocapture"
    echo "cargo test --all-features simd:: -- --nocapture"
    echo
    echo "status:"
    echo "runtime_backend_report=$runtime_status"
    echo "simd_prototype_equivalence=$prototype_status"
    echo "runtime_dispatch=avx512-vbmi-encode-then-avx2-encode-then-ssse3-sse4.1-encode-on-x86-or-neon-encode-on-little-endian-aarch64-or-wasm-simd128-when-supported-else-scalar"
    echo "active_backend_admitted=avx512-vbmi-or-avx2-or-ssse3-sse4.1-or-neon-or-wasm-simd128-encode"
    echo "prototype_state=real-non-dispatchable"
    echo "prototype_avx512_vbmi=admitted-encode-backend"
    echo "strict_decode_avx512_vbmi=admitted-standard-url-safe-std-x86"
    echo "prototype_avx2=admitted-encode-backend"
    echo "strict_decode_avx2=admitted-standard-url-safe-std-x86"
    echo "prototype_ssse3_sse41=admitted-encode-backend"
    echo "strict_decode_ssse3_sse41=admitted-standard-url-safe-std-x86"
    echo "prototype_neon=admitted-encode-backend-little-endian-aarch64-standard-family"
    echo "strict_decode_neon=admitted-standard-url-safe-little-endian-std-aarch64"
    echo "prototype_wasm_simd128=admitted-encode-and-strict-decode-backend-for-narrow-wasm32-simd128-profile"
    echo "wasm_simd128_evidence=compile-test-binary-plus-node-v8-and-wasmtime-runtime-smoke"
    echo
    echo "artifacts:"
    if command -v sha256sum >/dev/null 2>&1; then
        sha256sum "$runtime_output" "$prototype_output"
    elif command -v shasum >/dev/null 2>&1; then
        shasum -a 256 "$runtime_output" "$prototype_output"
    else
        cksum "$runtime_output" "$prototype_output"
    fi
    echo
    echo "interpretation:"
    echo "This evidence records runtime backend reporting, admitted AVX-512 VBMI, AVX2, SSSE3/SSE4.1, NEON, or wasm simd128 encode and strict decode dispatch when supported, and remaining inactive SIMD prototype scalar-equivalence results for this machine."
    echo "The AVX-512 VBMI, AVX2, SSSE3/SSE4.1, and NEON strict decode backends are admitted only for Standard and URL-safe std targets; NEON admission is little-endian AArch64 only, and unsupported decode surfaces still report scalar execution."
    echo "Wasm simd128 has a narrow active backend admission for wasm32 binaries built with target-feature=+simd128, simd, and allow-wasm32-best-effort-wipe; runtime smoke evidence is produced separately by scripts/check_wasm_runtime_dispatch.sh."
    echo "The admitted x86 AVX-512 VBMI, AVX2, and SSSE3/SSE4.1 paths exercise real fixed-block vector encode logic for Standard and URL-safe alphabets when the required CPU feature bundle is available."
    echo "On little-endian AArch64 hosts, the admitted NEON path exercises real fixed-block vector encode and strict decode logic for Standard and URL-safe alphabets; big-endian AArch64 and 32-bit ARM remain scalar or scaffold evidence."
    echo "Wasm simd128 compile evidence is produced by scripts/check_simd_feature_bundles.sh and runtime smoke evidence is produced by scripts/check_wasm_runtime_dispatch.sh."
    echo "This does not replace fuzzing, Miri, unsafe inventory review, generated assembly evidence, benchmark evidence, or release notes."
} >"$manifest"

echo "backend evidence: wrote $evidence_dir"

if [ "$runtime_status" -ne 0 ]; then
    exit "$runtime_status"
fi

if [ "$prototype_status" -ne 0 ]; then
    exit "$prototype_status"
fi
