#!/usr/bin/env bash
set -euo pipefail

cd "$(dirname "$0")"

# LinuxCNC source basis: Node smoke only verifies the wasm/API bridge around
# source-backed LinuxCNC RS274 and switchkins/remap fixtures; it must not grow
# independent G-code or kinematics behavior.
missing=()
minimum_steps=${WASM_NODE_SMOKE_MIN_STEPS:-50}
if ! [[ "$minimum_steps" =~ ^[1-9][0-9]*$ ]]; then
    echo "WASM_NODE_SMOKE_MIN_STEPS must be a positive integer: $minimum_steps" >&2
    exit 1
fi

require_command() {
    local command_name=$1
    if ! command -v "$command_name" >/dev/null 2>&1; then
        missing+=("$command_name")
    fi
}

require_file() {
    local file_path=$1
    if [[ ! -f "$file_path" ]]; then
        missing+=("$file_path")
    elif [[ ! -r "$file_path" || ! -s "$file_path" ]]; then
        missing+=("readable non-empty $file_path")
    fi
}

report_missing_prerequisites() {
    echo "WASM Node smoke prerequisites are missing: ${missing[*]}." >&2
    echo "Run ./build-wasm.sh after activating emsdk to generate web/public/cnc_sim.js and web/public/cnc_sim.wasm." >&2
}

required_files=(
    test-web-wasm-node-smoke.cjs
    web/public/cnc_sim.js
    web/public/cnc_sim.wasm
    web/public/linuxcnc_switchkins_remap_config_cases.json
    web/src/app.js
    web/src/wasm-core.js
)

for required in \
    node \
    "${required_files[@]}"
do
    if [[ "$required" == node ]]; then
        require_command node
    else
        require_file "$required"
    fi
done

if ((${#missing[@]} > 0)); then
    report_missing_prerequisites
    exit 1
fi

if ! node - <<'JS'
const fs = require("fs");
const cases = JSON.parse(fs.readFileSync("web/public/linuxcnc_switchkins_remap_config_cases.json", "utf8"));
if (!Array.isArray(cases) || cases.length === 0) {
  throw new Error("expected non-empty LinuxCNC switchkins config case JSON");
}
for (const [index, configCase] of cases.entries()) {
  if (
    !configCase ||
    typeof configCase.field !== "string" ||
    typeof configCase.value !== "string" ||
    !Number.isInteger(configCase.m428) ||
    !Number.isInteger(configCase.m429) ||
    !Number.isInteger(configCase.m430)
  ) {
    throw new Error(`invalid LinuxCNC switchkins config case at index ${index}`);
  }
}
JS
then
    echo "WASM Node smoke switchkins config case JSON check failed" >&2
    exit 1
fi

node_log=$(mktemp "${TMPDIR:-/tmp}/cnc_sim_node_smoke.XXXXXX.log")
cleanup() {
    rm -f "$node_log"
}
trap cleanup EXIT

echo "running WASM Node smoke"
echo "WASM Node smoke node version: $(node --version)"
if ! node --check test-web-wasm-node-smoke.cjs >"$node_log" 2>&1; then
    echo "WASM Node smoke syntax check failed" >&2
    sed -n '1,80p' "$node_log" >&2
    exit 1
fi
for web_module in web/public/cnc_sim.js web/src/wasm-core.js web/src/app.js; do
    if ! node --check "$web_module" >"$node_log" 2>&1; then
        echo "WASM Node smoke web module syntax check failed for $web_module" >&2
        sed -n '1,80p' "$node_log" >&2
        exit 1
    fi
done
if ! node test-web-wasm-node-smoke.cjs >"$node_log" 2>&1; then
    echo "WASM Node smoke failed" >&2
    sed -n '1,120p' "$node_log" >&2
    exit 1
fi
passed_steps=$(grep -o 'web wasm node smoke passed ([0-9][0-9]* steps)' "$node_log" | tail -n 1 | grep -o '[0-9][0-9]*' || true)
if [[ -z "$passed_steps" ]]; then
    echo "WASM Node smoke did not report a completed step count" >&2
    sed -n '1,120p' "$node_log" >&2
    exit 1
fi
if ((passed_steps < minimum_steps)); then
    echo "WASM Node smoke covered $passed_steps steps, expected at least $minimum_steps" >&2
    sed -n '1,120p' "$node_log" >&2
    exit 1
fi
cat "$node_log"