from __future__ import annotations

import uuid
from datetime import date, datetime

from sqlalchemy import Boolean, Date, DateTime, ForeignKey, Integer, String, Text, UniqueConstraint, func
from sqlalchemy.orm import Mapped, mapped_column
from sqlalchemy.types import JSON

from app.core.database import Base
from app.models.base import ActorAuditMixin, TenantMixin, TimestampMixin, UUIDPrimaryKeyMixin
from app.models.types import GUID


class WorkHub(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin, ActorAuditMixin):
    __tablename__ = "work_hubs"
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[str | None] = mapped_column(Text)
    status: Mapped[str] = mapped_column(String(40), default="active", nullable=False, index=True)
    owner_user_id: Mapped[str | None] = mapped_column(String(100), index=True)


class Team(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin, ActorAuditMixin):
    __tablename__ = "teams"
    work_hub_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("work_hubs.id"), nullable=False, index=True)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[str | None] = mapped_column(Text)
    status: Mapped[str] = mapped_column(String(40), default="active", nullable=False, index=True)
    owner_user_id: Mapped[str | None] = mapped_column(String(100), index=True)


class TeamMember(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin):
    __tablename__ = "team_members"
    __table_args__ = (UniqueConstraint("tenant_id", "team_id", "user_id", name="uq_team_member"),)
    team_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("teams.id"), nullable=False, index=True)
    user_id: Mapped[str] = mapped_column(String(100), nullable=False, index=True)
    role: Mapped[str] = mapped_column(String(40), default="member", nullable=False)
    status: Mapped[str] = mapped_column(String(40), default="active", nullable=False, index=True)
    joined_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), nullable=False)


class Project(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin, ActorAuditMixin):
    __tablename__ = "projects"
    work_hub_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("work_hubs.id"), nullable=False, index=True)
    team_id: Mapped[uuid.UUID | None] = mapped_column(GUID(), ForeignKey("teams.id"), index=True)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[str | None] = mapped_column(Text)
    status: Mapped[str] = mapped_column(String(40), default="planning", nullable=False, index=True)
    priority: Mapped[str] = mapped_column(String(40), default="medium", nullable=False)
    owner_user_id: Mapped[str | None] = mapped_column(String(100), index=True)
    start_date: Mapped[date | None] = mapped_column(Date)
    due_date: Mapped[date | None] = mapped_column(Date, index=True)
    budget_estimate: Mapped[int | None] = mapped_column(Integer)
    extra: Mapped[dict] = mapped_column(JSON, default=dict, nullable=False)


class ProjectMember(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin):
    __tablename__ = "project_members"
    __table_args__ = (UniqueConstraint("tenant_id", "project_id", "user_id", name="uq_project_member"),)
    project_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("projects.id"), nullable=False, index=True)
    user_id: Mapped[str] = mapped_column(String(100), nullable=False, index=True)
    role: Mapped[str] = mapped_column(String(40), default="member", nullable=False)
    status: Mapped[str] = mapped_column(String(40), default="active", nullable=False)


class Task(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin, ActorAuditMixin):
    __tablename__ = "tasks"
    work_hub_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("work_hubs.id"), nullable=False, index=True)
    project_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("projects.id"), nullable=False, index=True)
    team_id: Mapped[uuid.UUID | None] = mapped_column(GUID(), ForeignKey("teams.id"), index=True)
    title: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[str | None] = mapped_column(Text)
    status: Mapped[str] = mapped_column(String(40), default="backlog", nullable=False, index=True)
    priority: Mapped[str] = mapped_column(String(40), default="medium", nullable=False)
    assignee_user_id: Mapped[str | None] = mapped_column(String(100), index=True)
    due_date: Mapped[date | None] = mapped_column(Date, index=True)
    estimated_minutes: Mapped[int | None] = mapped_column(Integer)
    actual_minutes: Mapped[int | None] = mapped_column(Integer)
    labels: Mapped[list] = mapped_column(JSON, default=list, nullable=False)
    sort_order: Mapped[int] = mapped_column(Integer, default=0, nullable=False)


class ContentType(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin):
    __tablename__ = "content_types"
    __table_args__ = (UniqueConstraint("tenant_id", "code", name="uq_content_type_code"),)
    work_hub_id: Mapped[uuid.UUID | None] = mapped_column(GUID(), ForeignKey("work_hubs.id"), index=True)
    code: Mapped[str] = mapped_column(String(80), nullable=False, index=True)
    label: Mapped[str] = mapped_column(String(255), nullable=False)
    channel: Mapped[str | None] = mapped_column(String(80))
    workflow: Mapped[list] = mapped_column(JSON, default=list, nullable=False)
    enabled: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    extra: Mapped[dict] = mapped_column(JSON, default=dict, nullable=False)


class ContentItem(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin, ActorAuditMixin):
    __tablename__ = "content_items"
    work_hub_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("work_hubs.id"), nullable=False, index=True)
    project_id: Mapped[uuid.UUID | None] = mapped_column(GUID(), ForeignKey("projects.id"), index=True)
    team_id: Mapped[uuid.UUID | None] = mapped_column(GUID(), ForeignKey("teams.id"), index=True)
    title: Mapped[str] = mapped_column(String(255), nullable=False)
    content_type: Mapped[str] = mapped_column(String(80), nullable=False, index=True)
    channel: Mapped[str | None] = mapped_column(String(80), index=True)
    status: Mapped[str] = mapped_column(String(40), default="draft", nullable=False, index=True)
    priority: Mapped[str] = mapped_column(String(40), default="medium", nullable=False)
    owner_user_id: Mapped[str | None] = mapped_column(String(100), index=True)
    creator_user_id: Mapped[str | None] = mapped_column(String(100))
    reviewer_user_id: Mapped[str | None] = mapped_column(String(100), index=True)
    scheduled_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), index=True)
    published_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    campaign_ref: Mapped[str | None] = mapped_column(String(255))
    caption: Mapped[str | None] = mapped_column(Text)
    body: Mapped[str | None] = mapped_column(Text)
    brief: Mapped[dict] = mapped_column(JSON, default=dict, nullable=False)
    extra: Mapped[dict] = mapped_column(JSON, default=dict, nullable=False)


class ContentApproval(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin):
    __tablename__ = "content_approvals"
    content_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("content_items.id"), nullable=False, index=True)
    work_hub_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("work_hubs.id"), nullable=False, index=True)
    approver_user_id: Mapped[str] = mapped_column(String(100), nullable=False, index=True)
    requester_user_id: Mapped[str | None] = mapped_column(String(100))
    approval_type: Mapped[str] = mapped_column(String(40), default="internal", nullable=False)
    status: Mapped[str] = mapped_column(String(40), default="pending", nullable=False, index=True)
    comment: Mapped[str | None] = mapped_column(Text)
    requested_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), nullable=False)
    responded_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))


class AssetReference(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin):
    __tablename__ = "asset_references"
    work_hub_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("work_hubs.id"), nullable=False, index=True)
    project_id: Mapped[uuid.UUID | None] = mapped_column(GUID(), ForeignKey("projects.id"), index=True)
    content_id: Mapped[uuid.UUID | None] = mapped_column(GUID(), ForeignKey("content_items.id"), index=True)
    task_id: Mapped[uuid.UUID | None] = mapped_column(GUID(), ForeignKey("tasks.id"), index=True)
    file_ref: Mapped[str] = mapped_column(String(255), nullable=False)
    title: Mapped[str | None] = mapped_column(String(255))
    asset_type: Mapped[str | None] = mapped_column(String(80))
    role: Mapped[str | None] = mapped_column(String(80))
    sort_order: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
    storage_status: Mapped[str] = mapped_column(String(40), default="reference_only", nullable=False)
    extra: Mapped[dict] = mapped_column(JSON, default=dict, nullable=False)


class Comment(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin):
    __tablename__ = "comments"
    work_hub_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("work_hubs.id"), nullable=False, index=True)
    subject_type: Mapped[str] = mapped_column(String(40), nullable=False, index=True)
    subject_id: Mapped[uuid.UUID] = mapped_column(GUID(), nullable=False, index=True)
    author_user_id: Mapped[str] = mapped_column(String(100), nullable=False)
    body: Mapped[str] = mapped_column(Text, nullable=False)
    status: Mapped[str] = mapped_column(String(40), default="active", nullable=False)


class Mention(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin):
    __tablename__ = "mentions"
    work_hub_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("work_hubs.id"), nullable=False, index=True)
    comment_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("comments.id"), nullable=False, index=True)
    mentioned_user_id: Mapped[str] = mapped_column(String(100), nullable=False, index=True)
    subject_type: Mapped[str] = mapped_column(String(40), nullable=False)
    subject_id: Mapped[uuid.UUID] = mapped_column(GUID(), nullable=False)
    notification_status: Mapped[str] = mapped_column(String(40), default="persisted", nullable=False)


class Activity(Base, UUIDPrimaryKeyMixin, TenantMixin):
    __tablename__ = "activities"
    work_hub_id: Mapped[uuid.UUID] = mapped_column(GUID(), ForeignKey("work_hubs.id"), nullable=False, index=True)
    entity_type: Mapped[str] = mapped_column(String(80), nullable=False, index=True)
    entity_id: Mapped[uuid.UUID] = mapped_column(GUID(), nullable=False, index=True)
    action: Mapped[str] = mapped_column(String(80), nullable=False)
    actor_user_id: Mapped[str | None] = mapped_column(String(100))
    payload: Mapped[dict] = mapped_column(JSON, default=dict, nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), nullable=False, index=True)


class WorkspaceAuditLog(Base, UUIDPrimaryKeyMixin, TenantMixin):
    __tablename__ = "workspace_audit_logs"
    entity_type: Mapped[str] = mapped_column(String(100), nullable=False)
    entity_id: Mapped[uuid.UUID | None] = mapped_column(GUID())
    action: Mapped[str] = mapped_column(String(50), nullable=False)
    actor_user_id: Mapped[str | None] = mapped_column(String(100))
    changes: Mapped[dict] = mapped_column(JSON, default=dict, nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), nullable=False)


class OutboxEvent(Base, UUIDPrimaryKeyMixin, TenantMixin):
    __tablename__ = "outbox_events"
    event_type: Mapped[str] = mapped_column(String(150), nullable=False)
    aggregate_type: Mapped[str] = mapped_column(String(100), nullable=False)
    aggregate_id: Mapped[str] = mapped_column(String(100), nullable=False)
    payload: Mapped[dict] = mapped_column(JSON, default=dict, nullable=False)
    status: Mapped[str] = mapped_column(String(30), default="pending", nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), nullable=False)


class WorkspaceSetting(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin):
    __tablename__ = "workspace_settings"
    work_hub_id: Mapped[uuid.UUID | None] = mapped_column(GUID(), ForeignKey("work_hubs.id"), index=True)
    key: Mapped[str] = mapped_column(String(150), nullable=False)
    value: Mapped[dict] = mapped_column(JSON, default=dict, nullable=False)


class WorkspacePermission(Base, UUIDPrimaryKeyMixin, TenantMixin, TimestampMixin):
    __tablename__ = "workspace_permissions"
    code: Mapped[str] = mapped_column(String(150), nullable=False)
    description: Mapped[str | None] = mapped_column(String(255))