from __future__ import annotations

from pydantic import BaseModel, Field


class TTSVoiceCapabilities(BaseModel):
    synthesis_target: str = "voice-note"
    transcodes_audio: bool = False
    enabled: bool = False


class TTSCapabilities(BaseModel):
    voice: TTSVoiceCapabilities = Field(default_factory=TTSVoiceCapabilities)


class ChannelCapabilities(BaseModel):
    """渠道能力声明 — 标准能力标志

    BaseChannelAdapter 子类通过声明此模型来告知 Gateway 和前端
    该渠道支持哪些功能。Gateway 启动时收集所有渠道的此声明，
    通过 get_channel_status() 向客户端广播可用能力集合。
    """

    chat_types: list[str] = Field(default_factory=lambda: ["direct"])
    delivery_mode: str = "direct"

    polls: bool = False
    reactions: bool = False
    edit: bool = False
    unsend: bool = False
    reply: bool = False

    effects: bool = False

    group_management: bool = False

    threads: bool = False

    media: bool = False
    max_media_size_mb: int = 100

    tts: TTSCapabilities = Field(default_factory=TTSCapabilities)

    native_commands: bool = False

    block_streaming: bool = False
    lane_streaming: bool = False
    reasoning_streaming: bool = False

    pin: bool = False
    unpin: bool = False
    list_pins: bool = False

    send_ephemeral: bool = False

    vision: bool = False
    approval: bool = False
    typing: bool = False

    text_chunk_limit: int = 4096
    supports_markdown: bool = False
    supports_streaming: bool = False
    streaming_modes: list[str] = Field(default_factory=lambda: ["off"])

    def supported_actions(self) -> list[str]:
        actions: list[str] = []
        if self.media:
            actions.append("send_media")
        if self.edit:
            actions.append("edit")
        if self.unsend:
            actions.append("delete")
        if self.reactions:
            actions.append("react")
        if self.pin:
            actions.append("pin")
        if self.unpin:
            actions.append("unpin")
        if self.list_pins:
            actions.append("list_pins")
        if self.polls:
            actions.append("create_poll")
        if self.threads:
            actions.append("create_thread")
        if self.send_ephemeral:
            actions.append("send_ephemeral")
        if self.group_management:
            actions.extend(["kick", "ban", "mute"])
        return actions


CAPS_SIMPLE_TEXT = ChannelCapabilities()

CAPS_FULL_FEATURED = ChannelCapabilities(
    chat_types=["direct", "group", "thread"],
    polls=True,
    reactions=True,
    edit=True,
    unsend=True,
    reply=True,
    threads=True,
    media=True,
    supports_markdown=True,
    supports_streaming=True,
    streaming_modes=["chunked", "live"],
)

CAPS_GROUP_CHAT_ONLY = ChannelCapabilities(
    chat_types=["direct", "group"],
    reply=True,
    media=True,
    group_management=True,
    supports_markdown=True,
    supports_streaming=True,
    streaming_modes=["block"],
)