"""
Android media.projection 组件 — MediaProjectionManager, MediaProjection, MediaProjectionInfo 等
方法签名完全对齐 Android SDK
"""

from typing import Any, Callable, Dict, List, Optional

from .._core import Stub, AndroidOnlyError


# ═══════════════════════════════════════════════════════════════
# MediaProjectionManager
# ═══════════════════════════════════════════════════════════════

class MediaProjectionManager(Stub):
    """MediaProjectionManager — 媒体投影管理器"""

    def __init__(self):
        super().__init__()
        self._active_projections: Dict[int, "MediaProjection"] = {}
        self._callbacks: Dict[int, Callable] = {}

    def createScreenCaptureIntent(self) -> Any:
        return "SCREEN_CAPTURE_INTENT"

    def getMediaProjection(self, resultCode: int, data: Any) -> Optional["MediaProjection"]:
        if resultCode == -1:  # RESULT_OK
            proj = MediaProjection()
            self._active_projections[id(proj)] = proj
            return proj
        return None

    def getActiveProjectionInfo(self) -> Optional["MediaProjectionInfo"]:
        for proj in self._active_projections.values():
            info = proj.getProjectionInfo()
            if info:
                return info
        return None

    def getDisplayProjection(self, displayId: int) -> Optional["MediaProjection"]:
        return None

    def addCallback(self, callback: Callable, handler: Any = None):
        cid = id(callback)
        self._callbacks[cid] = callback

    def removeCallback(self, callback: Callable):
        cid = id(callback)
        self._callbacks.pop(cid, None)

    def isMediaProjectionAllowed(self, packageName: str) -> bool:
        return True


# ═══════════════════════════════════════════════════════════════
# MediaProjection
# ═══════════════════════════════════════════════════════════════

class MediaProjection(Stub):
    """MediaProjection — 媒体投影"""

    # ═══════════════════════════════════════════════════════════
    # Callback
    # ═══════════════════════════════════════════════════════════

    class Callback(Stub):
        """MediaProjection.Callback — 投影回调"""

        def onStop(self):
            pass

        def onCapturedContentResize(self, width: int, height: int):
            pass

        def onCapturedContentVisibilityChanged(self, isVisible: bool):
            pass

    def __init__(self):
        super().__init__()
        self._stopped = False
        self._callbacks: List[MediaProjection.Callback] = []
        self._projection_info = MediaProjectionInfo(
            packageName="com.android.systemui",
            uid=1000,
            isVirtualDisplay=False
        )

    def createVirtualDisplay(self, name: str, width: int, height: int,
                             densityDpi: int, flags: int, surface: Any,
                             callback: Callable = None, handler: Any = None) -> Any:
        from .hardware_display import VirtualDisplay
        vd = VirtualDisplay(99, name, width, height, densityDpi, surface, flags)
        return vd

    def registerCallback(self, callback: Callback):
        self._callbacks.append(callback)

    def unregisterCallback(self, callback: Callback):
        if callback in self._callbacks:
            self._callbacks.remove(callback)

    def stop(self):
        self._stopped = True
        for cb in self._callbacks:
            cb.onStop()

    def getProjectionInfo(self) -> "MediaProjectionInfo":
        return self._projection_info

    def getDisplay(self) -> Optional[Any]:
        from .hardware_display import Display
        return Display(displayId=0, name="Projection Display")

    def applyTransparentRegionOverlay(self, region: Any):
        pass

    def removeTransparentRegionOverlay(self):
        pass

    def toString(self) -> str:
        return f"MediaProjection(stopped={self._stopped})"


# ═══════════════════════════════════════════════════════════════
# MediaProjectionInfo
# ═══════════════════════════════════════════════════════════════

class MediaProjectionInfo(Stub):
    """MediaProjectionInfo — 媒体投影信息"""

    def __init__(self, packageName: str = "", uid: int = 0,
                 isVirtualDisplay: bool = False):
        super().__init__()
        self._package_name = packageName
        self._uid = uid
        self._is_virtual_display = isVirtualDisplay

    def getProjectionType(self) -> int:
        return 0

    def getLaunchedFromPackage(self) -> str:
        return self._package_name

    def getLaunchedFromUid(self) -> int:
        return self._uid

    def isVirtualDisplay(self) -> bool:
        return self._is_virtual_display

    def equals(self, other: Any) -> bool:
        if not isinstance(other, MediaProjectionInfo):
            return False
        return (self._package_name == other._package_name
                and self._uid == other._uid)

    def hashCode(self) -> int:
        return hash((self._package_name, self._uid)) & 0x7FFFFFFF

    def toString(self) -> str:
        return f"MediaProjectionInfo(package={self._package_name}, uid={self._uid})"


# ═══════════════════════════════════════════════════════════════
# __all__
# ═══════════════════════════════════════════════════════════════

__all__ = [
    "MediaProjectionManager",
    "MediaProjection",
    "MediaProjectionInfo",
]