#!/bin/bash

output_path=lib/binding_rust/bindings.rs
header_path='lib/include/tree_sitter/api.h'
no_derive_copy=(
  TSInput
  TSLanguage
  TSLogger
  TSParser
  TSTree
  TSQuery
  TSQueryCursor
  TSQueryCapture
  TSQueryMatch
  TSQueryPredicateStep
)
no_copy=$(IFS='|'; echo "${no_derive_copy[*]}")

file_version=$(head -n1 "$output_path" | cut -d' ' -f6)
tool_version=$(bindgen --version | cut -d' ' -f2)
higher_version=$(echo -e "${file_version}\n${tool_version}" | sort -V | tail -n1)

if [ "$higher_version" != "$tool_version" ]; then
  echo "Latest used bindgen version was $file_version" >&2
  echo "Currently installed bindgen CLI version is $tool_version" >&2
  echo >&2
  echo "It's needed to upgrade bindgen CLI first with \`cargo install bindgen-cli\`" >&2
  exit 1
fi

bindgen                                        \
  --no-layout-tests                            \
  --allowlist-type '^TS.*'                     \
  --allowlist-function '^ts_.*'                \
  --blocklist-type '^__.*'                     \
  --no-copy "$no_copy"                         \
  $header_path > $output_path

echo "" >> $output_path

defines=(
  TREE_SITTER_LANGUAGE_VERSION
  TREE_SITTER_MIN_COMPATIBLE_LANGUAGE_VERSION
)

for define in "${defines[@]}"; do
  define_value=$(grep -E "#define $define (.*)" $header_path | cut -d' ' -f3)
  echo "pub const $define: usize = $define_value;" >> $output_path
done