uzor-mobile 1.0.12

//! Android-specific platform implementation
//!
//! This module provides Android integration via NDK and JNI.

use uzor::platform::{PlatformEvent, SystemTheme};
use crate::{HapticStyle, ScreenOrientation};

#[cfg(feature = "android")]
use ndk::native_window::NativeWindow;

#[cfg(feature = "android")]
use jni::{JNIEnv, JavaVM, objects::JObject};

/// Android-specific backend
pub struct AndroidBackend {
    #[cfg(feature = "android")]
    _vm: JavaVM,

    // Stub fields for when android feature is not enabled
    #[cfg(not(feature = "android"))]
    _stub: (),
}

impl AndroidBackend {
    /// Create a new Android backend
    ///
    /// # Errors
    ///
    /// Returns an error if the Android runtime is not available or JNI setup fails.
    pub fn new() -> Result<Self, String> {
        #[cfg(feature = "android")]
        {
            // TODO: Get JavaVM from NDK context
            // For now, return a stub implementation
            Err("Android backend not fully implemented yet".to_string())
        }

        #[cfg(not(feature = "android"))]
        {
            Ok(Self { _stub: () })
        }
    }

    /// Get screen size in physical pixels
    pub fn screen_size(&self) -> (u32, u32) {
        #[cfg(feature = "android")]
        {
            // TODO: Get screen size from Android Display API via JNI
            // For now, return common phone resolution
            (1080, 2400)
        }

        #[cfg(not(feature = "android"))]
        {
            (1080, 2400)
        }
    }

    /// Get scale factor (device pixel ratio)
    pub fn scale_factor(&self) -> f64 {
        #[cfg(feature = "android")]
        {
            // TODO: Get density from Android DisplayMetrics via JNI
            // Common Android density is 3.0 (xxhdpi)
            3.0
        }

        #[cfg(not(feature = "android"))]
        {
            3.0
        }
    }

    /// Get safe area insets
    pub fn safe_area_insets(&self) -> (f64, f64, f64, f64) {
        #[cfg(feature = "android")]
        {
            // TODO: Get window insets from Android WindowInsets API
            // Status bar: ~24dp, Navigation bar: ~48dp (varies by device)
            let status_bar = 24.0 * self.scale_factor();
            let nav_bar = 48.0 * self.scale_factor();
            (status_bar, 0.0, nav_bar, 0.0)
        }

        #[cfg(not(feature = "android"))]
        {
            (72.0, 0.0, 144.0, 0.0) // Typical values
        }
    }

    /// Get current screen orientation
    pub fn orientation(&self) -> ScreenOrientation {
        #[cfg(feature = "android")]
        {
            // TODO: Get orientation from Android Configuration via JNI
            ScreenOrientation::Portrait
        }

        #[cfg(not(feature = "android"))]
        {
            ScreenOrientation::Portrait
        }
    }

    /// Trigger haptic feedback
    pub fn haptic_feedback(&mut self, style: HapticStyle) {
        #[cfg(feature = "android")]
        {
            // TODO: Use Android Vibrator API via JNI
            // Map HapticStyle to Android HapticFeedbackConstants
            let _ = style;
        }

        #[cfg(not(feature = "android"))]
        {
            let _ = style;
        }
    }

    /// Poll for platform events
    pub fn poll_event(&mut self) -> Option<PlatformEvent> {
        #[cfg(feature = "android")]
        {
            // TODO: Process Android input events from native activity
            None
        }

        #[cfg(not(feature = "android"))]
        {
            None
        }
    }

    /// Set window title (no-op on Android)
    pub fn set_title(&mut self, _title: &str) {
        // Android apps don't have window titles
    }

    /// Get clipboard text
    pub fn get_clipboard_text(&self) -> Option<String> {
        #[cfg(feature = "android")]
        {
            // TODO: Use Android ClipboardManager via JNI
            None
        }

        #[cfg(not(feature = "android"))]
        {
            None
        }
    }

    /// Set clipboard text
    pub fn set_clipboard_text(&mut self, text: &str) -> Result<(), String> {
        #[cfg(feature = "android")]
        {
            // TODO: Use Android ClipboardManager via JNI
            let _ = text;
            Err("Android clipboard not implemented yet".to_string())
        }

        #[cfg(not(feature = "android"))]
        {
            let _ = text;
            Err("Android feature not enabled".to_string())
        }
    }

    /// Open URL in browser
    pub fn open_url(&self, url: &str) -> Result<(), String> {
        #[cfg(feature = "android")]
        {
            // TODO: Launch Intent.ACTION_VIEW via JNI
            let _ = url;
            Err("Android URL opening not implemented yet".to_string())
        }

        #[cfg(not(feature = "android"))]
        {
            let _ = url;
            Err("Android feature not enabled".to_string())
        }
    }

    /// Get system theme
    pub fn system_theme(&self) -> Option<SystemTheme> {
        #[cfg(feature = "android")]
        {
            // TODO: Check Configuration.UI_MODE_NIGHT_MASK via JNI
            Some(SystemTheme::Light)
        }

        #[cfg(not(feature = "android"))]
        {
            Some(SystemTheme::Light)
        }
    }

    /// Set IME position
    pub fn set_ime_position(&mut self, _x: f64, _y: f64) {
        // Android handles IME positioning automatically
    }

    /// Show virtual keyboard
    pub fn show_keyboard(&mut self) {
        #[cfg(feature = "android")]
        {
            // TODO: Use InputMethodManager.showSoftInput via JNI
        }
    }

    /// Hide virtual keyboard
    pub fn hide_keyboard(&mut self) {
        #[cfg(feature = "android")]
        {
            // TODO: Use InputMethodManager.hideSoftInputFromWindow via JNI
        }
    }
}

// =============================================================================
// Helper Functions (when android feature is enabled)
// =============================================================================

#[cfg(feature = "android")]
mod jni_helpers {
    use super::*;

    /// Get Android Context from native activity
    ///
    /// TODO: Implement this by getting the native activity pointer
    /// and accessing its Java context
    pub fn get_context<'a>(_env: &'a JNIEnv<'a>) -> Option<JObject<'a>> {
        // Placeholder
        None
    }

    /// Call a method on Android ClipboardManager
    pub fn clipboard_operation<'a>(
        _env: &'a JNIEnv<'a>,
        _context: JObject<'a>,
        _operation: &str,
    ) -> Result<Option<String>, String> {
        // Placeholder
        Err("Not implemented".to_string())
    }

    /// Get native window for rendering
    pub fn get_native_window() -> Option<NativeWindow> {
        // TODO: Get from native activity
        None
    }
}