"""SQLAlchemy models for the kommunikation plugin."""

from __future__ import annotations

import uuid
from datetime import datetime
from typing import Any

from sqlalchemy import (
    Boolean,
    DateTime,
    ForeignKey,
    Index,
    Integer,
    String,
    Text,
    UniqueConstraint,
    func,
)
from sqlalchemy.dialects.postgresql import JSONB, UUID as PGUUID
from sqlalchemy.orm import Mapped, mapped_column

from app.core.db import Base, TenantMixin


class CommConversation(Base, TenantMixin):
    """Conversation / Room — tenant-scoped, supports pinning, locking, archiving."""

    __tablename__ = "comm_conversations"
    __table_args__ = (
        Index("ix_comm_conversations_tenant", "tenant_id"),
        Index("ix_comm_conversations_tenant_pinned", "tenant_id", "is_pinned"),
        Index("ix_comm_conversations_last_msg", "tenant_id", "last_msg_at"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    title: Mapped[str | None] = mapped_column(String(255), nullable=True)
    title_set_by: Mapped[uuid.UUID | None] = mapped_column(PGUUID(as_uuid=True), nullable=True)
    is_pinned: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    is_locked: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    locked_by: Mapped[str | None] = mapped_column(String(100), nullable=True)
    is_direct: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    is_archived: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    created_by: Mapped[uuid.UUID | None] = mapped_column(PGUUID(as_uuid=True), nullable=True)
    created_by_type: Mapped[str] = mapped_column(String(20), nullable=False, default="user")
    last_msg_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    last_msg_preview: Mapped[str | None] = mapped_column(Text, nullable=True)
    last_msg_sender_type: Mapped[str | None] = mapped_column(String(50), nullable=True)
    metadata_: Mapped[dict[str, Any]] = mapped_column("metadata", JSONB, default=dict, nullable=False)


class CommParticipant(Base, TenantMixin):
    """Participant in a conversation — user, ai, system, gateway, etc."""

    __tablename__ = "comm_participants"
    __table_args__ = (
        UniqueConstraint(
            "conversation_id", "participant_id", "participant_type",
            name="uq_comm_participants_conv_part_type",
        ),
        Index("ix_comm_participants_tenant_conv", "tenant_id", "conversation_id"),
        Index("ix_comm_participants_tenant_user", "tenant_id", "participant_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    conversation_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("comm_conversations.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    participant_id: Mapped[uuid.UUID | None] = mapped_column(PGUUID(as_uuid=True), nullable=True)
    participant_type: Mapped[str] = mapped_column(String(50), nullable=False)
    display_name: Mapped[str | None] = mapped_column(String(255), nullable=True)
    role: Mapped[str] = mapped_column(String(20), nullable=False, default="member")
    joined_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())
    left_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)


class CommMessage(Base, TenantMixin):
    """Message in a conversation — text content plus rich content blocks."""

    __tablename__ = "comm_messages"
    __table_args__ = (
        Index("ix_comm_messages_tenant_conv", "tenant_id", "conversation_id", "created_at"),
        Index("ix_comm_messages_tenant_sender", "tenant_id", "sender_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    conversation_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("comm_conversations.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    sender_id: Mapped[uuid.UUID | None] = mapped_column(PGUUID(as_uuid=True), nullable=True)
    sender_type: Mapped[str] = mapped_column(String(50), nullable=False)
    content: Mapped[str] = mapped_column(Text, nullable=False, default="")
    content_format: Mapped[str] = mapped_column(String(20), nullable=False, default="text")
    metadata_: Mapped[dict[str, Any]] = mapped_column("metadata", JSONB, default=dict, nullable=False)
    reply_to_id: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("comm_messages.id", ondelete="SET NULL"),
        nullable=True,
    )
    is_pinned: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    read_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    edited_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)


class CommMessageBlock(Base, TenantMixin):
    """Rich content block attached to a message."""

    __tablename__ = "comm_message_blocks"
    __table_args__ = (
        Index("ix_comm_blocks_tenant_msg", "tenant_id", "message_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    message_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("comm_messages.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    block_type: Mapped[str] = mapped_column(String(50), nullable=False)
    block_data: Mapped[dict[str, Any]] = mapped_column(JSONB, nullable=False)
    sort_order: Mapped[int] = mapped_column(Integer, nullable=False, default=0)


class CommMessageAttachment(Base, TenantMixin):
    """File attachment on a message — DMS reference or comm-internal upload."""

    __tablename__ = "comm_message_attachments"
    __table_args__ = (
        Index("ix_comm_attachments_tenant_msg", "tenant_id", "message_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    message_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("comm_messages.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    file_id: Mapped[uuid.UUID | None] = mapped_column(PGUUID(as_uuid=True), nullable=True)
    file_source: Mapped[str] = mapped_column(String(10), nullable=False, default="comm")
    file_name: Mapped[str] = mapped_column(String(255), nullable=False)
    file_type: Mapped[str] = mapped_column(String(255), nullable=False)
    file_size: Mapped[int | None] = mapped_column(Integer, nullable=True)
    thumbnail_path: Mapped[str | None] = mapped_column(String(1024), nullable=True)
    metadata_: Mapped[dict[str, Any]] = mapped_column("metadata", JSONB, default=dict, nullable=False)


class CommMessageReaction(Base, TenantMixin):
    """Emoji reaction on a message."""

    __tablename__ = "comm_message_reactions"
    __table_args__ = (
        UniqueConstraint("message_id", "user_id", "emoji", name="uq_comm_reactions_msg_user_emoji"),
        Index("ix_comm_reactions_tenant_msg", "tenant_id", "message_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    message_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("comm_messages.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    user_id: Mapped[uuid.UUID] = mapped_column(PGUUID(as_uuid=True), nullable=False)
    emoji: Mapped[str] = mapped_column(String(50), nullable=False)


class CommMessageRead(Base, TenantMixin):
    """Read state per user per conversation."""

    __tablename__ = "comm_message_reads"
    __table_args__ = (
        UniqueConstraint("conversation_id", "user_id", name="uq_comm_reads_conv_user"),
        Index("ix_comm_reads_tenant_user", "tenant_id", "user_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    conversation_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("comm_conversations.id", ondelete="CASCADE"),
        nullable=False,
    )
    user_id: Mapped[uuid.UUID] = mapped_column(PGUUID(as_uuid=True), nullable=False)
    last_read_msg_id: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("comm_messages.id", ondelete="SET NULL"),
        nullable=True,
    )
    last_read_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )


class CommConversationPin(Base, TenantMixin):
    """User-specific conversation pinning."""

    __tablename__ = "comm_conversation_pins"
    __table_args__ = (
        UniqueConstraint("conversation_id", "user_id", name="uq_comm_pins_conv_user"),
        Index("ix_comm_pins_tenant_user", "tenant_id", "user_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    conversation_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("comm_conversations.id", ondelete="CASCADE"),
        nullable=False,
    )
    user_id: Mapped[uuid.UUID] = mapped_column(PGUUID(as_uuid=True), nullable=False)
    pinned_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )


class CommConversationMute(Base, TenantMixin):
    """User-specific conversation muting."""

    __tablename__ = "comm_conversation_mutes"
    __table_args__ = (
        UniqueConstraint("conversation_id", "user_id", name="uq_comm_mutes_conv_user"),
        Index("ix_comm_mutes_tenant_user", "tenant_id", "user_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    conversation_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("comm_conversations.id", ondelete="CASCADE"),
        nullable=False,
    )
    user_id: Mapped[uuid.UUID] = mapped_column(PGUUID(as_uuid=True), nullable=False)
    muted_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )


class CommMessageEdit(Base, TenantMixin):
    """Edit history for messages — stores old content before each edit."""

    __tablename__ = "comm_message_edits"
    __table_args__ = (
        Index("ix_comm_edits_tenant_msg", "tenant_id", "message_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    message_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("comm_messages.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    old_content: Mapped[str] = mapped_column(Text, nullable=False)
    old_blocks: Mapped[list[Any]] = mapped_column(JSONB, default=list, nullable=False)
    edited_by: Mapped[uuid.UUID] = mapped_column(PGUUID(as_uuid=True), nullable=False)
    edited_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )