#!/usr/bin/env bash

set -e

# Parameterize
PYTHON_VERSION=3.9.7
BUILDDIR=/tmp/electrum-build
PACKAGE=Electrum
GIT_REPO=https://github.com/spesmilo/electrum

export GCC_STRIP_BINARIES="1"
export PYTHONDONTWRITEBYTECODE=1  # don't create __pycache__/ folders with .pyc files


. "$(dirname "$0")/../build_tools_util.sh"


CONTRIB_OSX="$(dirname "$(realpath "$0")")"
CONTRIB="$CONTRIB_OSX/.."
PROJECT_ROOT="$CONTRIB/.."
CACHEDIR="$CONTRIB_OSX/.cache"

mkdir -p "$CACHEDIR"

cd "$PROJECT_ROOT"


which brew > /dev/null 2>&1 || fail "Please install brew from https://brew.sh/ to continue"
which xcodebuild > /dev/null 2>&1 || fail "Please install xcode command line tools to continue"

# Code Signing: See https://developer.apple.com/library/archive/documentation/Security/Conceptual/CodeSigningGuide/Procedures/Procedures.html
if [ -n "$CODESIGN_CERT" ]; then
    # Test the identity is valid for signing by doing this hack. There is no other way to do this.
    cp -f /bin/ls ./CODESIGN_TEST
    set +e
    codesign -s "$CODESIGN_CERT" --dryrun -f ./CODESIGN_TEST > /dev/null 2>&1
    res=$?
    set -e
    rm -f ./CODESIGN_TEST
    if ((res)); then
        fail "Code signing identity \"$CODESIGN_CERT\" appears to be invalid."
    fi
    unset res
    info "Code signing enabled using identity \"$CODESIGN_CERT\""
else
    warn "Code signing DISABLED. Specify a valid macOS Developer identity installed on the system to enable signing."
fi


function DoCodeSignMaybe { # ARGS: infoName fileOrDirName
    infoName="$1"
    file="$2"
    deep=""
    if [ -z "$CODESIGN_CERT" ]; then
        # no cert -> we won't codesign
        return
    fi
    if [ -d "$file" ]; then
        deep="--deep"
    fi
    if [ -z "$infoName" ] || [ -z "$file" ] || [ ! -e "$file" ]; then
        fail "Argument error to internal function DoCodeSignMaybe()"
    fi
    hardened_arg="--entitlements=${CONTRIB_OSX}/entitlements.plist -o runtime"

    info "Code signing ${infoName}..."
    codesign -f -v $deep -s "$CODESIGN_CERT" $hardened_arg "$file" || fail "Could not code sign ${infoName}"
}

info "Installing Python $PYTHON_VERSION"
PKG_FILE="python-${PYTHON_VERSION}-macosx10.9.pkg"
if [ ! -f "$CACHEDIR/$PKG_FILE" ]; then
    curl -o "$CACHEDIR/$PKG_FILE" "https://www.python.org/ftp/python/${PYTHON_VERSION}/$PKG_FILE"
fi
echo "f40f7407d20f88a6a64678b6586853de16cc5d7d07c82a8a2a7e43bba59dbae5  $CACHEDIR/$PKG_FILE" | shasum -a 256 -c \
     || fail "python pkg checksum mismatched"
sudo installer -pkg "$CACHEDIR/$PKG_FILE" -target / \
    || fail "failed to install python"

# sanity check "python3" has the version we just installed.
FOUND_PY_VERSION=$(python3 -c 'import sys; print(".".join(map(str, sys.version_info[:3])))')
if [[ "$FOUND_PY_VERSION" != "$PYTHON_VERSION" ]]; then
    fail "python version mismatch: $FOUND_PY_VERSION != $PYTHON_VERSION"
fi

break_legacy_easy_install

# create a fresh virtualenv
# This helps to avoid older versions of pip-installed dependencies interfering with the build.
VENV_DIR="$CONTRIB_OSX/build-venv"
rm -rf "$VENV_DIR"
python3 -m venv $VENV_DIR
source $VENV_DIR/bin/activate

info "Installing build dependencies"
python3 -m pip install --no-dependencies --no-warn-script-location -Ir ./contrib/deterministic-build/requirements-build-mac.txt \
    || fail "Could not install build dependencies"

info "Using these versions for building $PACKAGE:"
sw_vers
python3 --version
echo -n "Pyinstaller "
pyinstaller --version

rm -rf ./dist

git submodule update --init

rm  -rf "$BUILDDIR" > /dev/null 2>&1
mkdir "$BUILDDIR"

info "generating locale"
(
    if ! which msgfmt > /dev/null 2>&1; then
        brew install gettext
        brew link --force gettext
    fi
    cd "$CONTRIB"/deterministic-build/electrum-locale
    # we want the binary to have only compiled (.mo) locale files; not source (.po) files
    rm -rf "$PROJECT_ROOT/electrum/locale/"
    for i in ./locale/*; do
        dir="$PROJECT_ROOT/electrum/$i/LC_MESSAGES"
        mkdir -p "$dir"
        msgfmt --output-file="$dir/electrum.mo" "$i/electrum.po" || true
    done
) || fail "failed generating locale"


info "Installing some build-time deps for compilation..."
brew install autoconf automake libtool gettext coreutils pkgconfig

if [ ! -f "$PROJECT_ROOT"/electrum/libsecp256k1.0.dylib ]; then
    info "Building libsecp256k1 dylib..."
    "$CONTRIB"/make_libsecp256k1.sh || fail "Could not build libsecp"
else
    info "Skipping libsecp256k1 build: reusing already built dylib."
fi
cp "$PROJECT_ROOT"/electrum/libsecp256k1.0.dylib "$CONTRIB"/osx

if [ ! -f "$PROJECT_ROOT"/electrum/libzbar.0.dylib ]; then
    info "Building ZBar dylib..."
    "$CONTRIB"/make_zbar.sh || fail "Could not build ZBar dylib"
else
    info "Skipping ZBar build: reusing already built dylib."
fi
cp "$PROJECT_ROOT"/electrum/libzbar.0.dylib "$CONTRIB"/osx

if [ ! -f "$PROJECT_ROOT"/electrum/libusb-1.0.dylib ]; then
    info "Building libusb dylib..."
    "$CONTRIB"/make_libusb.sh || fail "Could not build libusb dylib"
else
    info "Skipping libusb build: reusing already built dylib."
fi
cp "$PROJECT_ROOT"/electrum/libusb-1.0.dylib "$CONTRIB"/osx


info "Installing requirements..."
python3 -m pip install --no-dependencies --no-warn-script-location -Ir ./contrib/deterministic-build/requirements.txt \
    || fail "Could not install requirements"

info "Installing hardware wallet requirements..."
python3 -m pip install --no-dependencies --no-warn-script-location -Ir ./contrib/deterministic-build/requirements-hw.txt \
    || fail "Could not install hardware wallet requirements"

info "Installing dependencies specific to binaries..."
python3 -m pip install --no-dependencies --no-warn-script-location -Ir ./contrib/deterministic-build/requirements-binaries-mac.txt \
    || fail "Could not install dependencies specific to binaries"

info "Building $PACKAGE..."
python3 -m pip install --no-dependencies --no-warn-script-location . > /dev/null || fail "Could not build $PACKAGE"

info "Faking timestamps..."
find . -exec touch -t '200101220000' {} + || true

VERSION=`git describe --tags --dirty --always`

info "Building binary"
pyinstaller --noconfirm --ascii --clean --name $VERSION contrib/osx/osx.spec || fail "Could not build binary"

info "Adding bitcoin URI types to Info.plist"
plutil -insert 'CFBundleURLTypes' \
	-xml '<array><dict> <key>CFBundleURLName</key> <string>bitcoin</string> <key>CFBundleURLSchemes</key> <array><string>bitcoin</string><string>lightning</string></array> </dict></array>' \
	-- dist/$PACKAGE.app/Contents/Info.plist \
	|| fail "Could not add keys to Info.plist. Make sure the program 'plutil' exists and is installed."

DoCodeSignMaybe "app bundle" "dist/${PACKAGE}.app"

if [ ! -z "$CODESIGN_CERT" ]; then
    if [ ! -z "$APPLE_ID_USER" ]; then
        info "Notarizing .app with Apple's central server..."
        "${CONTRIB_OSX}/notarize_app.sh" "dist/${PACKAGE}.app" || fail "Could not notarize binary."
    else
        warn "AppleID details not set! Skipping Apple notarization."
    fi
fi

info "Creating .DMG"
hdiutil create -fs HFS+ -volname $PACKAGE -srcfolder dist/$PACKAGE.app dist/electrum-$VERSION.dmg || fail "Could not create .DMG"

DoCodeSignMaybe ".DMG" "dist/electrum-${VERSION}.dmg"

if [ -z "$CODESIGN_CERT" ]; then
    warn "App was built successfully but was not code signed. Users may get security warnings from macOS."
    warn "Specify a valid code signing identity to enable code signing."
fi