#!/bin/bash

# UniFFI iOS and tvOS Build Script
# Generates Swift bindings and universal framework for both iOS and tvOS

set -e

echo "🔨 Building UniFFI iOS and tvOS Framework..."

# Clean previous builds
echo "🧹 Cleaning previous builds..."
rm -rf target/
rm -rf bindings/
mkdir -p bindings/ios

# Install nightly toolchain for tvOS support
echo "🌙 Installing nightly toolchain for tvOS support..."
rustup toolchain install nightly
rustup component add rust-std --toolchain nightly --target aarch64-apple-tvos
rustup component add rust-std --toolchain nightly --target aarch64-apple-tvos-sim
rustup component add rust-std --toolchain nightly --target x86_64-apple-tvos

# Install uniffi_bindgen if not present
if ! command -v uniffi-bindgen &> /dev/null; then
    echo "📦 Installing uniffi_bindgen..."
    cargo install uniffi_bindgen --bin uniffi-bindgen
fi

# iOS targets
IOS_TARGETS=(
    "aarch64-apple-ios"           # iOS device (ARM64)
    "x86_64-apple-ios"            # iOS simulator (Intel)
)

# tvOS targets
TVOS_TARGETS=(
    "aarch64-apple-tvos"          # tvOS device (ARM64)
    "aarch64-apple-tvos-sim"      # tvOS simulator (Apple Silicon)
    "x86_64-apple-tvos"           # tvOS simulator (Intel)
)

echo "📱 Installing iOS targets..."
for target in "${IOS_TARGETS[@]}"; do
    rustup target add "$target"
done

echo "📺 Installing tvOS targets..."
for target in "${TVOS_TARGETS[@]}"; do
    rustup target add "$target" --toolchain nightly
done

echo "🔧 Building Rust library for iOS targets..."
for target in "${IOS_TARGETS[@]}"; do
    echo "Building for $target..."
    cargo build --release --target "$target" --features uniffi
done

echo "🔧 Building Rust library for tvOS targets..."
for target in "${TVOS_TARGETS[@]}"; do
    echo "Building for $target..."
    cargo +nightly build --release --target "$target" --features uniffi
done

echo "🔗 Creating universal libraries..."

# Create iOS universal library
lipo -create \
    target/aarch64-apple-ios/release/libchurch_core.a \
    target/x86_64-apple-ios/release/libchurch_core.a \
    -output bindings/ios/libchurch_core_ios.a

# Create tvOS universal library
lipo -create \
    target/aarch64-apple-tvos/release/libchurch_core.a \
    target/aarch64-apple-tvos-sim/release/libchurch_core.a \
    target/x86_64-apple-tvos/release/libchurch_core.a \
    -output bindings/ios/libchurch_core_tvos.a

# Create combined universal library for Xcode (it will pick the right slice)
lipo -create \
    target/aarch64-apple-ios/release/libchurch_core.a \
    target/x86_64-apple-ios/release/libchurch_core.a \
    target/aarch64-apple-tvos/release/libchurch_core.a \
    target/x86_64-apple-tvos/release/libchurch_core.a \
    -output bindings/ios/libchurch_core_universal.a

echo "⚡ Generating Swift bindings..."
# Generate Swift bindings using uniffi_bindgen
uniffi-bindgen generate \
    src/church_core.udl \
    --language swift \
    --out-dir bindings/ios \
    --lib-file target/aarch64-apple-ios/release/libchurch_core.a

echo "📋 Generating module map..."
# Create module map for Swift integration
cat > bindings/ios/church_coreFFI.modulemap << EOF
module church_coreFFI {
    header "church_coreFFI.h"
    export *
}
EOF

echo "📦 Moving files to iOS project..."
# Copy generated files to iOS project
IOS_PROJECT_DIR="../RTSDA-iOS/RTSDA"
cp bindings/ios/church_core.swift "$IOS_PROJECT_DIR/"
cp bindings/ios/church_coreFFI.h "$IOS_PROJECT_DIR/"
cp bindings/ios/church_coreFFI.modulemap "$IOS_PROJECT_DIR/"
cp bindings/ios/libchurch_core_universal.a "$IOS_PROJECT_DIR/libchurch_core.a"

echo "✅ UniFFI iOS and tvOS framework build complete!"
echo "📁 Generated files:"
echo "   - church_core.swift (Swift bindings)"
echo "   - church_coreFFI.h (C header)"
echo "   - church_coreFFI.modulemap (Module map)"
echo "   - libchurch_core.a (Universal static library - iOS + tvOS)"
echo ""
echo "🎯 Files copied to: $IOS_PROJECT_DIR"
echo "💡 You can now build your iOS/tvOS project in Xcode!"
echo ""
echo "📺 Libraries also available separately:"
echo "   - bindings/ios/libchurch_core_ios.a (iOS only)"
echo "   - bindings/ios/libchurch_core_tvos.a (tvOS only)"