#!/bin/bash
# ============================================================================
# DarkForge Linux — Phase 3, Chapter 8: Verify Batch 4 Scripts
# ============================================================================
# Purpose:  Verify all 25 batch 4 scripts exist, are executable, and have
#           valid structure before running the full batch.
# Inputs:   Scripts in current directory
# Outputs:  Validation report
# ============================================================================

set -u

echo "=========================================================================="
echo "DarkForge Linux — Batch 4 Verification Script"
echo "=========================================================================="
echo ""

# Expected scripts
SCRIPTS=(
    "155-kmod.sh"
    "156-coreutils.sh"
    "157-diffutils.sh"
    "158-gawk.sh"
    "159-findutils.sh"
    "160-groff.sh"
    "161-gzip.sh"
    "162-iproute2.sh"
    "163-kbd.sh"
    "164-libpipeline.sh"
    "165-make.sh"
    "166-patch.sh"
    "167-tar.sh"
    "168-texinfo.sh"
    "169-vim.sh"
    "170-markupsafe.sh"
    "171-jinja2.sh"
    "172-eudev.sh"
    "173-man-db.sh"
    "174-procps-ng.sh"
    "175-util-linux.sh"
    "176-e2fsprogs.sh"
    "177-sysklogd.sh"
    "178-sysvinit.sh"
    "179-strip-and-cleanup.sh"
)

FOUND_COUNT=0
MISSING_COUNT=0
NOT_EXECUTABLE_COUNT=0
NO_HEADER_COUNT=0

echo "Checking ${#SCRIPTS[@]} scripts..."
echo ""

for script in "${SCRIPTS[@]}"; do
    if [ ! -f "$script" ]; then
        echo "[MISSING] $script"
        ((MISSING_COUNT++))
        continue
    fi

    if [ ! -x "$script" ]; then
        echo "[NOT EXEC] $script (fixing...)"
        chmod +x "$script"
        ((NOT_EXECUTABLE_COUNT++))
    fi

    # Check for proper bash header
    if ! head -1 "$script" | grep -q "^#!/bin/bash"; then
        echo "[NO SHEBANG] $script"
        ((NO_HEADER_COUNT++))
        continue
    fi

    # Check for set -euo pipefail
    if ! grep -q "set -euo pipefail" "$script"; then
        echo "[NO ERROR HANDLING] $script"
        continue
    fi

    # Check for source of 100-chroot-env.sh
    if ! grep -q "source /sources/toolchain-scripts/100-chroot-env.sh" "$script"; then
        echo "[NO ENV SOURCE] $script"
        continue
    fi

    ((FOUND_COUNT++))
done

echo ""
echo "=========================================================================="
echo "VERIFICATION REPORT"
echo "=========================================================================="
echo ""
echo "Total scripts expected: ${#SCRIPTS[@]}"
echo "Scripts found:         $FOUND_COUNT"
echo "Scripts missing:       $MISSING_COUNT"
echo "Scripts not exec:      $NOT_EXECUTABLE_COUNT (fixed)"
echo "Scripts no header:     $NO_HEADER_COUNT"
echo ""

if [ $MISSING_COUNT -eq 0 ] && [ $NO_HEADER_COUNT -eq 0 ]; then
    echo "✓ All batch 4 scripts are valid and ready to execute!"
    echo ""
    echo "To run all 25 scripts, execute:"
    echo "  ./150-run-batch4.sh"
    echo ""
    exit 0
else
    echo "✗ Some scripts are missing or invalid."
    echo "  Please fix the issues listed above before proceeding."
    echo ""
    exit 1
fi