#!/bin/bash
# RSSuper Linux Build Script
# Native Linux build using meson/ninja with GTK4

set -e

# Configuration
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"
LINUX_PROJECT_DIR="$PROJECT_ROOT/native-route/linux"

# Default values
BUILD_TYPE="${1:-debug}"
ACTION="${2:-build}"

# Show help
show_help() {
    echo "RSSuper Linux Build Script"
    echo ""
    echo "Usage: $0 [BUILD_TYPE] [ACTION]"
    echo ""
    echo "Arguments:"
    echo "  BUILD_TYPE   Build type (debug|release) [Default: debug]"
    echo "  ACTION       Action (build|install|test|clean|setup) [Default: build]"
    echo ""
    echo "Examples:"
    echo "  $0                      # Build debug"
    echo "  $0 release              # Build release"
    echo "  $0 debug setup         # Setup build environment"
    echo "  $0 debug test          # Run tests"
    echo "  $0 clean               # Clean build"
}

# Check prerequisites
check_prerequisites() {
    local MISSING_DEPS=()
    
    # Check for required tools
    for cmd in meson ninja pkg-config; do
        if ! command -v $cmd &> /dev/null; then
            MISSING_DEPS+=("$cmd")
        fi
    done
    
    if [ ${#MISSING_DEPS[@]} -gt 0 ]; then
        echo "Error: Missing build tools: ${MISSING_DEPS[*]}"
        echo ""
        echo "On Ubuntu/Debian:"
        echo "  sudo apt install meson ninja-build pkg-config"
        echo ""
        echo "On Fedora:"
        echo "  sudo dnf install meson ninja-build pkgconf-pkg-config"
        echo ""
        echo "On Arch:"
        echo "  sudo pacman -S meson ninja pkgconf"
        exit 1
    fi
    
    echo "Build tools check passed"
}

# Install development dependencies
install_dependencies() {
    echo "Installing Linux development dependencies..."
    
    local DISTRO=$(lsb_release -i -s 2>/dev/null || echo "unknown")
    
    case "$DISTRO" in
        Ubuntu|Debian)
            sudo apt-get update
            sudo apt-get install -y \
                build-essential \
                meson \
                ninja-build \
                pkg-config \
                libgtk-4-dev \
                libadwaita-1-dev \
                libsqlite3-dev \
                libxml2-dev \
                libcurl4-openssl-dev \
                libsoup-3-dev \
                valac
            ;;
        Fedora)
            sudo dnf install -y \
                gcc \
                gcc-c++ \
                meson \
                ninja-build \
                pkgconf-pkg-config \
                gtk4-devel \
                libadwaita-1-devel \
                sqlite-devel \
                libxml2-devel \
                libcurl-devel \
                libsoup3-devel \
                vala
            ;;
        arch)
            sudo pacman -S --noconfirm \
                base-devel \
                meson \
                ninja \
                pkgconf \
                gtk4 \
                libadwaita \
                sqlite \
                libxml2 \
                curl \
                libsoup3 \
                vala
            ;;
        *)
            echo "Warning: Unknown distribution ($DISTRO). Please install dependencies manually:"
            echo "  - meson, ninja-build, pkg-config"
            echo "  - GTK4 development files"
            echo "  - SQLite3 development files"
            echo "  - libxml2 development files"
            echo "  - curl development files"
            ;;
    esac
    
    echo "Dependencies installation complete"
}

# Create Linux project structure
create_linux_project() {
    echo "Creating Linux project structure..."
    
    mkdir -p "$LINUX_PROJECT_DIR/src/main"
    mkdir -p "$LINUX_PROJECT_DIR/src/models"
    mkdir -p "$LINUX_PROJECT_DIR/src/services"
    mkdir -p "$LINUX_PROJECT_DIR/src/ui"
    mkdir -p "$LINUX_PROJECT_DIR/data"
    mkdir -p "$LINUX_PROJECT_DIR/build"
    
    # meson.build (root)
    cat > "$LINUX_PROJECT_DIR/meson.build" << 'EOF'
project('rssuper', 'c', 'vala',
  version: '1.0.0',
  meson_version: '>= 1.0.0',
  license: 'MIT',
  default_options: [
    'warning_level=1',
    'werror=false'
  ]
)

# Dependencies
gtk4 = dependency('gtk4', version: '>= 4.0')
adwaita = dependency('libadwaita-1', version: '>= 1.0')
sqlite = dependency('sqlite3')
xml2 = dependency('libxml-2.0')
curl = dependency('libcurl')
soup = dependency('libsoup-3.0')
glib = dependency('glib-2.0', version: '>= 2.70')
gobject = dependency('gobject-2.0')

# Common compiler and linker arguments
c_args = ['-D_GLIBCXX_USE_C99=1']
l_args = []

# Sources
main_sources = files(
  'src/main/rssuper.c',
  'src/main/window.c',
)

model_sources = files(
  'src/models/feed.vala',
  'src/models/item.vala',
  'src/models/database.vala',
)

service_sources = files(
  'src/services/rss-parser.vala',
  'src/services/feed-fetcher.vala',
)

ui_sources = files(
  'src/ui/feed-list.vala',
  'src/ui/item-list.vala',
  'src/ui/item-view.vala',
)

# Executable
rssuper_exe = executable(
  'rssuper',
  main_sources,
  model_sources,
  service_sources,
  ui_sources,
  dependencies: [
    gtk4,
    adwaita,
    sqlite,
    xml2,
    curl,
    soup,
    glib,
    gobject,
  ],
  c_args: c_args,
  link_args: l_args,
  install: true,
)

# Data files
install_data(
  'data/rssuper.desktop',
  install_dir: get_option('datadir') + '/share/applications'
)

install_data(
  'data/rssuper.svg',
  install_dir: get_option('datadir') + '/share/icons/hicolor/scalable/apps'
)

# Configuration
configure_file(
  input: 'config.h.in',
  output: 'config.h',
  configuration: meson.current_source_dir() / 'config.cfg'
)
EOF

    # Main C file
    cat > "$LINUX_PROJECT_DIR/src/main/rssuper.c" << 'EOF'
#include <gtk/gtk.h>
#include <adwaita.h>
#include "config.h"

static GtkApplication *app;

static void
activate(GtkApplication *application)
{
    AdwWindow *window;
    
    window = g_object_new(ADW_TYPE_WINDOW,
                         "title", "RSSuper",
                         "default-width", 1200,
                         "default-height", 800,
                         "show-mnemonic-label", false,
                         NULL);
    
    gtk_application_add_window(GTK_APPLICATION(application), GTK_WINDOW(window));
    gtk_widget_realize(GTK_WIDGET(window));
    gtk_widget_show(GTK_WIDGET(window));
}

int
main(int argc, char **argv)
{
    app = gtk_application_new("com.mikefreno.RSSuper",
                              G_APPLICATION_DEFAULT_FLAGS);
    
    g_signal_connect(app, "activate",
                     G_CALLBACK(activate), NULL);
    
    int status = g_application_run(G_APPLICATION(app), argc, argv);
    g_object_unref(app);
    
    return status;
}
EOF

    # Desktop file
    cat > "$LINUX_PROJECT_DIR/data/rssuper.desktop" << 'EOF'
[Desktop Entry]
Name=RSSuper
Comment=A native RSS reader for Linux
Exec=rssuper
Terminal=false
Type=Application
Icon=rssuper
Categories=Network;Reader;
Keywords=rss;feed;reader;
EOF

    # SVG Icon placeholder
    cat > "$LINUX_PROJECT_DIR/data/rssuper.svg" << 'EOF'
<svg xmlns="http://www.w3.org/2000/svg" width="256" height="256">
  <rect width="256" height="256" fill="#1976D2" rx="32"/>
  <text x="50%" y="50%" font-size="128" text-anchor="middle" 
        dominant-baseline="central" fill="white" font-family="sans-serif">
    R
  </text>
</svg>
EOF

    # Config template
    cat > "$LINUX_PROJECT_DIR/config.h.in" << 'EOF'
#ifndef CONFIG_H
#define CONFIG_H

#define RSSUPER_VERSION "@PROJECT_VERSION@"
#define RSSUPER_APP_ID "com.mikefreno.RSSuper"

#endif /* CONFIG_H */
EOF

    echo "Linux project structure created!"
}

# Setup build directory
setup_build() {
    echo "Setting up build directory..."
    
    cd "$LINUX_PROJECT_DIR"
    
    local BUILD_DIR="build"
    local BUILD_TYPE_FLAG=""
    
    if [ "$BUILD_TYPE" = "release" ]; then
        BUILD_TYPE_FLAG="--buildtype=release"
    else
        BUILD_TYPE_FLAG="--buildtype=debug"
    fi
    
    # Clean existing build directory
    if [ -d "$BUILD_DIR" ]; then
        rm -rf "$BUILD_DIR"
    fi
    
    meson setup "$BUILD_DIR" $BUILD_TYPE_FLAG
    
    echo "Build directory setup complete"
}

# Build the project
build_project() {
    echo "Building Linux $BUILD_TYPE..."
    
    cd "$LINUX_PROJECT_DIR"
    
    # Check if build directory exists
    if [ ! -d "build" ]; then
        echo "Build directory not found. Running setup first..."
        setup_build
    fi
    
    meson compile -C build
    
    echo "Build complete! Executable: $LINUX_PROJECT_DIR/build/rssuper"
}

# Install the application
install_app() {
    echo "Installing RSSuper..."
    
    cd "$LINUX_PROJECT_DIR"
    
    if [ ! -d "build" ]; then
        echo "Error: Build directory not found. Run build first."
        exit 1
    fi
    
    sudo meson install -C build
    
    echo "Installation complete!"
}

# Run tests
run_tests() {
    echo "Running Linux tests..."
    
    cd "$LINUX_PROJECT_DIR"
    
    if [ ! -d "build" ]; then
        echo "Build directory not found. Running setup first..."
        setup_build
    fi
    
    meson test -C build
}

# Clean build
clean_build() {
    echo "Cleaning Linux build..."
    
    cd "$LINUX_PROJECT_DIR"
    
    if [ -d "build" ]; then
        rm -rf build
        echo "Build directory removed"
    fi
}

# Run the application
run_app() {
    echo "Running RSSuper..."
    
    cd "$LINUX_PROJECT_DIR"
    
    if [ ! -f "build/rssuper" ]; then
        echo "Executable not found. Building first..."
        build_project
    fi
    
    ./build/rssuper
}

# Main
case "$ACTION" in
    setup)
        check_prerequisites
        if [ ! -d "$LINUX_PROJECT_DIR/src" ]; then
            create_linux_project
        fi
        setup_build
        ;;
    install-deps)
        install_dependencies
        ;;
    clean)
        clean_build
        ;;
    test)
        check_prerequisites
        if [ ! -d "$LINUX_PROJECT_DIR/src" ]; then
            create_linux_project
        fi
        setup_build
        run_tests
        ;;
    run)
        check_prerequisites
        if [ ! -d "$LINUX_PROJECT_DIR/src" ]; then
            create_linux_project
        fi
        setup_build
        build_project
        run_app
        ;;
    install)
        check_prerequisites
        build_project
        install_app
        ;;
    build|*)
        check_prerequisites
        if [ ! -d "$LINUX_PROJECT_DIR/src" ]; then
            create_linux_project
        fi
        setup_build
        build_project
        ;;
esac