#!/bin/bash
/**
 * @file misra_checker.sh
 * @brief MISRA C compliance checker
 */

set -e

# Script directory
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"

# Color codes
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m'

# MISRA configuration
MISRA_VERSION="MISRA C:2012"
MISRA_RULES="required"  # required, advisory, all

# Source directories
SOURCE_DIRS=(
    "${PROJECT_ROOT}/kernel/src"
    "${PROJECT_ROOT}/drivers/src"
    "${PROJECT_ROOT}/middleware"
    "${PROJECT_ROOT}/applications"
)

# Report directory
REPORT_DIR="${PROJECT_ROOT}/build/misra"
mkdir -p "${REPORT_DIR}"

# Print banner
echo -e "${BLUE}========================================${NC}"
echo -e "${BLUE}  MISRA C Compliance Checker${NC}"
echo -e "${BLUE}========================================${NC}"
echo -e "  Version: ${YELLOW}${MISRA_VERSION}${NC}"
echo -e "  Rules:   ${YELLOW}${MISRA_RULES}${NC}"
echo ""

# Check if cppcheck is available
if ! command -v cppcheck >/dev/null 2>&1; then
    echo -e "${RED}Error: cppcheck not found${NC}"
    echo "Install with: sudo apt-get install cppcheck"
    exit 1
fi

# Check if misra addon is available
MISRA_ADDON="/usr/share/cppcheck/addons/misra.py"
if [ ! -f "${MISRA_ADDON}" ]; then
    echo -e "${YELLOW}Warning: MISRA addon not found at ${MISRA_ADDON}${NC}"
    echo "Will use cppcheck with basic checks"
    USE_MISRA_ADDON=false
else
    USE_MISRA_ADDON=true
fi

# Function to check directory
check_directory() {
    local dir=$1
    local report_file="${REPORT_DIR}/$(basename ${dir})_misra.txt"

    echo -e "${YELLOW}Checking ${dir}...${NC}"

    if [ "${USE_MISRA_ADDON}" = true ]; then
        cppcheck \
            --enable=all \
            --inconclusive \
            --std=c11 \
            --platform=arm32 \
            --addon=misra \
            --suppress=missingIncludeSystem \
            --suppress=unusedFunction \
            -I"${PROJECT_ROOT}/kernel/include" \
            -I"${PROJECT_ROOT}/drivers/include" \
            -I"${PROJECT_ROOT}/middleware" \
            -I"${PROJECT_ROOT}/config" \
            "${dir}" \
            2>&1 | tee "${report_file}"
    else
        cppcheck \
            --enable=all \
            --inconclusive \
            --std=c11 \
            --platform=arm32 \
            --suppress=missingIncludeSystem \
            --suppress=unusedFunction \
            -I"${PROJECT_ROOT}/kernel/include" \
            -I"${PROJECT_ROOT}/drivers/include" \
            -I"${PROJECT_ROOT}/middleware" \
            -I"${PROJECT_ROOT}/config" \
            "${dir}" \
            2>&1 | tee "${report_file}"
    fi

    # Count violations
    local violations=$(grep -c "\[" "${report_file}" || true)
    echo -e "  Found ${violations} potential violations"
    echo ""
}

# Check each source directory
TOTAL_VIOLATIONS=0
for dir in "${SOURCE_DIRS[@]}"; do
    if [ -d "${dir}" ]; then
        check_directory "${dir}"
    fi
done

# Generate summary report
SUMMARY_FILE="${REPORT_DIR}/summary.txt"
echo "MISRA C Compliance Summary" > "${SUMMARY_FILE}"
echo "=========================" >> "${SUMMARY_FILE}"
echo "" >> "${SUMMARY_FILE}"
echo "Date: $(date)" >> "${SUMMARY_FILE}"
echo "Version: ${MISRA_VERSION}" >> "${SUMMARY_FILE}"
echo "Rules: ${MISRA_RULES}" >> "${SUMMARY_FILE}"
echo "" >> "${SUMMARY_FILE}"

for report in "${REPORT_DIR}"/*_misra.txt; do
    if [ -f "${report}" ]; then
        dir_name=$(basename "${report}" _misra.txt)
        violations=$(grep -c "\[" "${report}" || true)
        echo "${dir_name}: ${violations} violations" >> "${SUMMARY_FILE}"
    fi
done

echo -e "${GREEN}========================================${NC}"
echo -e "${GREEN}  MISRA Check Complete${NC}"
echo -e "${GREEN}========================================${NC}"
echo -e "Summary: ${BLUE}${SUMMARY_FILE}${NC}"