#!/bin/zsh

echo "🔎 Running Next.js Dynamic Route Health Check..."
echo ""

DYNAMIC_PAGES=$(find src/app -type f -path "*/\[*\]/page.js")

RED=$(tput setaf 1)
YELLOW=$(tput setaf 3)
GREEN=$(tput setaf 2)
RESET=$(tput sgr0)

check_pass() {
  echo "${GREEN}✔ PASS${RESET} $1"
}

check_warn() {
  echo "${YELLOW}⚠ WARN${RESET} $1"
}

check_fail() {
  echo "${RED}✖ FAIL${RESET} $1"
}

for FILE in $DYNAMIC_PAGES; do
  echo "=========================================="
  echo "📄 Checking: $FILE"

  FOLDER=$(basename $(dirname "$FILE"))
  PARAM_NAME=${FOLDER//[\[\]]/}

  CONTENT=$(cat "$FILE")

  echo "➡ Route param is: ${PARAM_NAME}"

  # 1. Check for export default async
  if echo "$CONTENT" | grep -q "export default async function"; then
    check_pass "Has async default export"
  else
    check_fail "Missing 'export default async function'"
  fi

  # 2. Check for await params
  if echo "$CONTENT" | grep -q "await params"; then
    check_pass "'await params' found"
  else
    check_fail "Missing 'await params' — required in Next.js 15+"
  fi

  # 3. Check if extracted param name is correct
  if echo "$CONTENT" | grep -q "const { $PARAM_NAME } = await params"; then
    check_pass "Correct param extraction: { $PARAM_NAME }"
  else
    check_warn "Param '$PARAM_NAME' may not be extracted with 'await params'"
  fi

  # 4. Check for leftover bad usage: params.paramName
  if echo "$CONTENT" | grep -q "params\.$PARAM_NAME"; then
    check_fail "Found old syntax 'params.$PARAM_NAME' — must be removed!"
  else
    check_pass "No old 'params.$PARAM_NAME' references"
  fi

  # 5. Check that param is used somewhere
  if echo "$CONTENT" | grep -q "$PARAM_NAME"; then
    check_pass "Param is referenced in file"
  else
    check_warn "Param '$PARAM_NAME' isn't used — this may be incorrect"
  fi

  # 6. Validate imports
  IMPORT_ERRORS=0

  while IFS= read -r line; do
    if [[ "$line" == import* ]]; then
      PATH=$(echo "$line" | sed -n 's/.*from "\(.*\)".*/\1/p')
      if [[ "$PATH" == @/* ]]; then
        # Attempt resolution
        RESOLVED="src${PATH#@}"
        RESOLVED="${RESOLVED%.js}.js"

        if [ ! -f "$RESOLVED" ] && [ ! -f "${RESOLVED%.js}.jsx" ] && [ ! -f "${RESOLVED%.js}.ts" ] && [ ! -f "${RESOLVED%.js}.tsx" ]; then
          check_warn "Import may be broken: $line"
          IMPORT_ERRORS=1
        fi
      fi
    fi
  done <<< "$(grep "^import" "$FILE")"

  if [[ $IMPORT_ERRORS -eq 0 ]]; then
    check_pass "All imports appear valid"
  fi

  # 7. Check param folder structure
  DIR=$(dirname "$FILE")

  if [ ! -d "$DIR" ]; then
    check_fail "Missing directory: $DIR (route broken)"
  else
    check_pass "Route directory exists"
  fi

  echo ""
done

echo "=========================================="
echo "🏁 Dynamic Route Health Check Complete!"