#!/bin/bash

set -e

SCRIPT_PATH=$(readlink -f "${BASH_SOURCE:-$0}")
SCRIPT_DIR=$(dirname "$SCRIPT_PATH")

exec_spacetime() {
  # args: target, environment, build root
  echo "[*] Running configure command: 'python3 $SCRIPT_DIR/spacetime/spacetime.py $1 $2 $SCRIPT_DIR'"
  python3 "$SCRIPT_DIR/spacetime/spacetime.py" "$1" "$2" "$SCRIPT_DIR"
}

exec_ninja() {
  # args: target
  echo "[*] Running build command: 'ninja -C $SCRIPT_DIR $1'"
  ninja -C "$SCRIPT_DIR" "$1"
}

sub_help() {
  echo "Spacetime - StarKingdoms build utility"
  echo "Spacetime is a small utility program to generate Ninja build manifests for compiling StarKingdoms."
  echo "Available targets:"
  echo "    help - Show this help screen" # done
  echo "    run_http - Compile the client and run a development http server for testing it" # done
  echo "    run_http_prod - Compile the client in production mode and run a development http server for testing it" # done
  echo "    run_server (default) - Compile and run the game server"
  echo "    build_server - Compile the game server"
  echo "    build_client_bundle - Compile an optimized WebAssembly client bundle" # done
  echo "    build_client_bundle_prod - Compile an optimized WebAssembly client bundle using textures-fast" # done
  echo "    install_tooling - Install the compilation utilities required for compiling StarKingdoms" # done
  echo "    build_assets - Compile spritesheets in all three texture sizes for textures-fast" # done
  echo "    build_assets_full - Compile spritesheets in full size for textures-fast" # done
  echo "    build_assets_375 - Commpile 37.5% spritesheets for textures-fast" # done
  echo "    build_assets_125 - Compile 12.5% spritesheets for textures-fast" # done
  echo "    clean - Remove all generated files"
}

check_install_cargo() {
  echo "[*] Checking for $1"
  if ! command -v "$1" &> /dev/null
  then
    echo "[+] $1 was not found, installing via Cargo..."
    cargo install "$2" $3
  fi
}

check() {
  echo "[*] Checking for $1"
  if ! command -v "$1" &> /dev/null
  then
    echo "[x] $1 was not found but is required for the build process to continue. Install it with your system package manager, or, if supported, 'st install_tooling'"
    exit 1
  fi
}

check_all() {
  check wasm-pack
  check sheep
  check inkscape
}

sub_install_tooling() {
  check_install_cargo wasm-pack wasm-pack --no-default-features
  check_install_cargo sheep sheep_cli
  check inkscape
  echo "[*] All required tools are installed"
}

sub_build_client_bundle() {
  check_all
  exec_spacetime client dev "$SCRIPT_DIR"
  exec_ninja client
}

sub_run_http() {
  check_all
  exec_spacetime client dev "$SCRIPT_DIR"
  exec_ninja client
  cd web && python3 -m http.server
}

sub_build_client_bundle_prod() {
  check_all
  exec_spacetime client prod "$SCRIPT_DIR"
  exec_ninja client
}

sub_run_http_prod() {
  check_all
  exec_spacetime client prod "$SCRIPT_DIR"
  exec_ninja client
  cd web && python3 -m http.server
}

sub_build_assets() {
  check_all
  exec_spacetime asset dev "$SCRIPT_DIR"
  exec_ninja asset
}

sub_build_assets_full() {
  check_all
  exec_spacetime asset dev "$SCRIPT_DIR"
  exec_ninja asset-full
}

sub_build_assets_375() {
  check_all
  exec_spacetime asset dev "$SCRIPT_DIR"
  exec_ninja asset-375
}

sub_build_assets_125() {
  check_all
  exec_spacetime asset dev "$SCRIPT_DIR"
  exec_ninja asset-125
}

subcommand=$1
case $subcommand in
    "" | "-h" | "--help" | "help")
        sub_help
        ;;
    *)
        echo "[*] Running build command $subcommand"
        shift
        sub_${subcommand} $@
        if [ $? = 127 ]; then
            echo "Error: '$subcommand' is not a known subcommand." >&2
            echo "       Run 'st --help' for a list of known subcommands." >&2
            exit 1
        fi
        ;;
esac