#!/usr/bin/env bash

set -euo pipefail

_get_path_separator() {
  local platform="${1:-$(uname -s)}"
  case "$platform" in
  MINGW* | MSYS* | CYGWIN* | Windows)
    echo ";"
    ;;
  *)
    echo ":"
    ;;
  esac
}

setup_onnx_paths() {
  local ort_lib="${ORT_LIB_LOCATION:-}"
  [ -z "$ort_lib" ] && return 0

  local platform="${RUNNER_OS:-$(uname -s)}"
  case "$platform" in
  Linux)
    export LD_LIBRARY_PATH="${ort_lib}:${LD_LIBRARY_PATH:-}"
    echo "✓ Set LD_LIBRARY_PATH for ONNX Runtime"
    ;;
  macOS | Darwin)
    export DYLD_LIBRARY_PATH="${ort_lib}:${DYLD_LIBRARY_PATH:-}"
    export DYLD_FALLBACK_LIBRARY_PATH="${ort_lib}:${DYLD_FALLBACK_LIBRARY_PATH:-}"
    echo "✓ Set DYLD_LIBRARY_PATH for ONNX Runtime on macOS"
    ;;
  Windows | MINGW* | MSYS* | CYGWIN*)
    export PATH="${ort_lib};${PATH:-}"
    echo "✓ Set PATH for ONNX Runtime on Windows"
    ;;
  esac
}

setup_rust_ffi_paths() {
  local repo_root="${1:-${REPO_ROOT:-}}"
  [ -z "$repo_root" ] && return 0

  local ffi_lib="$repo_root/target/release"
  local ffi_lib_gnu="$repo_root/target/x86_64-pc-windows-gnu/release"

  local platform="${RUNNER_OS:-$(uname -s)}"
  case "$platform" in
  Linux)
    [ ! -d "$ffi_lib" ] && return 0
    export LD_LIBRARY_PATH="${ffi_lib}:${LD_LIBRARY_PATH:-}"
    echo "✓ Set LD_LIBRARY_PATH for Rust FFI"
    ;;
  macOS | Darwin)
    [ ! -d "$ffi_lib" ] && return 0
    export DYLD_LIBRARY_PATH="${ffi_lib}:${DYLD_LIBRARY_PATH:-}"
    export DYLD_FALLBACK_LIBRARY_PATH="${ffi_lib}:${DYLD_FALLBACK_LIBRARY_PATH:-}"
    echo "✓ Set DYLD_LIBRARY_PATH for Rust FFI on macOS"
    ;;
  Windows | MINGW* | MSYS* | CYGWIN*)
    # Check for short path CI directories first
    local cargo_target="${CARGO_TARGET_DIR:-}"
    if [ -n "$cargo_target" ] && [ -d "$cargo_target/release" ]; then
      export PATH="${cargo_target}/release;${PATH:-}"
      echo "✓ Set PATH for Rust FFI (using CARGO_TARGET_DIR=$cargo_target)"
    fi
    # Add GNU target path if it exists
    if [ -d "$ffi_lib_gnu" ]; then
      export PATH="${ffi_lib_gnu};${PATH:-}"
      echo "✓ Set PATH for Rust FFI GNU target"
    fi
    # Add standard target path if it exists
    if [ -d "$ffi_lib" ]; then
      export PATH="${ffi_lib};${PATH:-}"
      echo "✓ Set PATH for Rust FFI on Windows"
    fi
    ;;
  esac
}

verify_pkg_config() {
  if pkg-config --exists kreuzberg-ffi 2>/dev/null; then
    return 0
  else
    {
      echo "Error: pkg-config cannot find kreuzberg-ffi"
      echo "PKG_CONFIG_PATH=${PKG_CONFIG_PATH:-<not set>}"
      echo "Run 'pkg-config --list-all' to see available packages"
    } >&2
    return 1
  fi
}

setup_go_paths_windows() {
  local repo_root="${1:-${REPO_ROOT:-}}"
  [ -z "$repo_root" ] && return 0

  local gnu_target="${repo_root}/target/x86_64-pc-windows-gnu/release"
  local release_target="${repo_root}/target/release"

  export PKG_CONFIG_PATH="${repo_root}/crates/kreuzberg-ffi:${PKG_CONFIG_PATH:-}"

  export PATH="${gnu_target};${release_target};${PATH:-}"

  export CGO_ENABLED=1
  export CGO_CFLAGS="-I${repo_root}/crates/kreuzberg-ffi/include"
  export CGO_LDFLAGS="-L${gnu_target} -L${release_target} -lkreuzberg_ffi -static-libgcc -static-libstdc++"

  echo "✓ Configured Go cgo environment for Windows"
}

# NOTE: CGO_LDFLAGS is set by setup-go-cgo-env action on Windows in CI, or by this script on Unix
setup_go_paths() {
  local repo_root="${1:-${REPO_ROOT:-}}"
  [ -z "$repo_root" ] && return 0

  local pc_path="${repo_root}/crates/kreuzberg-ffi/kreuzberg-ffi.pc"
  if [ ! -f "$pc_path" ]; then
    local version=""
    version="$(sed -n 's/^version = \"\\(.*\\)\"/\\1/p' "${repo_root}/Cargo.toml" | head -n 1 || true)"
    [ -z "$version" ] && version="unknown"

    local platform="${RUNNER_OS:-$(uname -s)}"
    local libs_private=""
    case "$platform" in
    Linux)
      libs_private="-lpthread -ldl -lm"
      ;;
    macOS | Darwin)
      libs_private="-framework CoreFoundation -framework Security -lpthread"
      ;;
    Windows | MINGW* | MSYS* | CYGWIN*)
      libs_private="-lws2_32 -luserenv -lbcrypt"
      ;;
    esac

    mkdir -p "$(dirname "$pc_path")"
    cat >"$pc_path" <<EOF
prefix=${repo_root}
exec_prefix=\${prefix}
libdir=${repo_root}/target/release
includedir=${repo_root}/crates/kreuzberg-ffi

Name: kreuzberg-ffi
Description: C FFI bindings for Kreuzberg document intelligence library
Version: ${version}
URL: https://kreuzberg.dev
Libs: -L\${libdir} -lkreuzberg_ffi
Libs.private: ${libs_private}
Cflags: -I\${includedir}
EOF
  fi

  export PKG_CONFIG_PATH="${repo_root}/crates/kreuzberg-ffi:${PKG_CONFIG_PATH:-}"

  export CGO_ENABLED=1
  export CGO_CFLAGS="-I${repo_root}/crates/kreuzberg-ffi/include"

  local platform="${RUNNER_OS:-$(uname -s)}"
  case "$platform" in
  Linux)
    export LD_LIBRARY_PATH="${repo_root}/target/release:${LD_LIBRARY_PATH:-}"
    export CGO_LDFLAGS="-L${repo_root}/target/release -lkreuzberg_ffi -Wl,-rpath,${repo_root}/target/release"
    ;;
  macOS | Darwin)
    export DYLD_LIBRARY_PATH="${repo_root}/target/release:${DYLD_LIBRARY_PATH:-}"
    export DYLD_FALLBACK_LIBRARY_PATH="${repo_root}/target/release:${DYLD_FALLBACK_LIBRARY_PATH:-}"
    export CGO_LDFLAGS="-L${repo_root}/target/release -lkreuzberg_ffi -Wl,-rpath,${repo_root}/target/release"
    ;;
  Windows | MINGW* | MSYS* | CYGWIN*)
    if [ -z "${CGO_LDFLAGS:-}" ] && [ -z "${GITHUB_ENV:-}" ]; then
      # Only set library search path; ffi.go CGO directives handle -l flags
      # This matches the approach in setup-go-cgo-env/windows.ps1
      export CGO_LDFLAGS="-L${repo_root}/target/x86_64-pc-windows-gnu/release -L${repo_root}/target/release"
    fi
    ;;
  esac

  echo "✓ Configured Go cgo environment"
}

setup_all_library_paths() {
  local repo_root="${1:-${REPO_ROOT:-}}"

  echo "Setting up library paths..."
  setup_onnx_paths
  setup_rust_ffi_paths "$repo_root"
  setup_go_paths "$repo_root"
  echo "✓ All library paths configured"
}

export -f setup_onnx_paths
export -f setup_rust_ffi_paths
export -f verify_pkg_config
export -f setup_go_paths_windows
export -f setup_go_paths
export -f setup_all_library_paths
export -f _get_path_separator