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

cpp_card=${CPP_CARD:-../lab-rv32i-freertos-task-stack-vector}
contract=config/paired-experiment.json

test -f "$cpp_card/include/FreeRTOSConfig.h" || {
  echo "paired K02 not found at $cpp_card" >&2
  exit 1
}

cmp include/FreeRTOSConfig.h "$cpp_card/include/FreeRTOSConfig.h"
cmp vendor/FreeRTOS-Kernel/UPSTREAM.md "$cpp_card/vendor/FreeRTOS-Kernel/UPSTREAM.md"

check_hash() {
  path=$1
  key=$2
  expected=$(jq -r ".kernel.files_sha256[\"$key\"]" "$contract")
  actual=$(sha256sum "$path" | awk '{print $1}')
  test "$actual" = "$expected" || {
    echo "pair contract hash mismatch: $path" >&2
    exit 1
  }
}

check_hash vendor/FreeRTOS-Kernel/tasks.c tasks.c
check_hash vendor/FreeRTOS-Kernel/list.c list.c
check_hash vendor/FreeRTOS-Kernel/portable/MemMang/heap_4.c heap_4.c
check_hash vendor/FreeRTOS-Kernel/portable/GCC/RISC-V/port.c port.c
check_hash vendor/FreeRTOS-Kernel/portable/GCC/RISC-V/portASM.S portASM.S

config_hash=$(sha256sum include/FreeRTOSConfig.h | awk '{print $1}')
test "$config_hash" = "$(jq -r .config.sha256 "$contract")"

grep -Fq 'work_limit = 20000U' "$cpp_card/src/tasks/task01_task_wrapper.cpp"
grep -Fq 'expected_sum = 200010000U' "$cpp_card/src/tasks/task01_task_wrapper.cpp"
grep -Fq 'worker_stack_words = 256U' "$cpp_card/src/tasks/task01_task_wrapper.cpp"
grep -Fq 'supervisor_stack_words = 160U' "$cpp_card/src/tasks/task01_task_wrapper.cpp"

echo "PASS pair: kernel/config/workload/stack contract matches K02 C++"