from __future__ import annotations

from datetime import datetime
from typing import Any, Literal

from pydantic import BaseModel, Field


StructureKind = Literal["hierarchy", "network", "membership", "classification"]
AuditDetailLevel = Literal["summary", "standard", "full"]


class OrganizationSettingsItem(BaseModel):
    id: str | None = None
    tenant_id: str
    allow_tenant_model_customization: bool
    require_model_change_requests: bool
    audit_detail_level: AuditDetailLevel
    change_retention_days: int | None = None
    settings: dict[str, Any]
    created_at: datetime | None = None
    updated_at: datetime | None = None


class OrganizationSettingsUpdateRequest(BaseModel):
    allow_tenant_model_customization: bool | None = None
    require_model_change_requests: bool | None = None
    audit_detail_level: AuditDetailLevel | None = None
    change_retention_days: int | None = Field(default=None, ge=0)
    settings: dict[str, Any] | None = None


class OrganizationUnitTypeItem(BaseModel):
    id: str
    tenant_id: str
    slug: str
    name: str
    description: str | None = None
    is_active: bool
    settings: dict[str, Any]
    created_at: datetime
    updated_at: datetime


class OrganizationStructureItem(BaseModel):
    id: str
    tenant_id: str
    slug: str
    name: str
    description: str | None = None
    structure_kind: str
    is_active: bool
    settings: dict[str, Any]
    created_at: datetime
    updated_at: datetime


class OrganizationRelationTypeItem(BaseModel):
    id: str
    tenant_id: str
    structure_id: str | None = None
    slug: str
    name: str
    description: str | None = None
    source_unit_type_id: str | None = None
    target_unit_type_id: str | None = None
    is_hierarchical: bool
    allow_cycles: bool
    is_active: bool
    settings: dict[str, Any]
    created_at: datetime
    updated_at: datetime


class OrganizationUnitItem(BaseModel):
    id: str
    tenant_id: str
    unit_type_id: str | None = None
    parent_id: str | None = None
    slug: str
    name: str
    description: str | None = None
    is_active: bool
    settings: dict[str, Any]
    created_at: datetime
    updated_at: datetime


class OrganizationRelationItem(BaseModel):
    id: str
    tenant_id: str
    structure_id: str
    relation_type_id: str
    source_unit_id: str
    target_unit_id: str
    valid_from: datetime | None = None
    valid_until: datetime | None = None
    is_active: bool
    settings: dict[str, Any]
    created_at: datetime
    updated_at: datetime


class OrganizationFunctionTypeItem(BaseModel):
    id: str
    tenant_id: str
    slug: str
    name: str
    description: str | None = None
    organization_unit_type_id: str | None = None
    delegable: bool
    act_in_place_allowed: bool
    is_active: bool
    settings: dict[str, Any]
    created_at: datetime
    updated_at: datetime


class OrganizationFunctionItem(BaseModel):
    id: str
    tenant_id: str
    function_type_id: str | None = None
    organization_unit_id: str
    slug: str
    name: str
    description: str | None = None
    delegable: bool
    act_in_place_allowed: bool
    is_active: bool
    settings: dict[str, Any]
    created_at: datetime
    updated_at: datetime


class OrganizationFunctionAssignmentItem(BaseModel):
    id: str
    tenant_id: str
    identity_id: str
    account_id: str | None = None
    function_id: str
    organization_unit_id: str
    applies_to_subunits: bool
    source: str
    delegated_from_assignment_id: str | None = None
    acting_for_account_id: str | None = None
    valid_from: datetime | None = None
    valid_until: datetime | None = None
    is_active: bool
    settings: dict[str, Any]
    created_at: datetime
    updated_at: datetime


class OrganizationModelResponse(BaseModel):
    unit_types: list[OrganizationUnitTypeItem]
    structures: list[OrganizationStructureItem]
    relation_types: list[OrganizationRelationTypeItem]
    units: list[OrganizationUnitItem]
    relations: list[OrganizationRelationItem]
    function_types: list[OrganizationFunctionTypeItem]
    functions: list[OrganizationFunctionItem]
    function_assignments: list[OrganizationFunctionAssignmentItem]


class SluggedCreateRequest(BaseModel):
    slug: str | None = Field(default=None, max_length=100)
    name: str = Field(min_length=1, max_length=255)
    description: str | None = None
    is_active: bool = True
    settings: dict[str, Any] = Field(default_factory=dict)
    change_request_id: str | None = None


class SluggedUpdateRequest(BaseModel):
    slug: str | None = Field(default=None, max_length=100)
    name: str | None = Field(default=None, max_length=255)
    description: str | None = None
    is_active: bool | None = None
    settings: dict[str, Any] | None = None
    change_request_id: str | None = None


class UnitTypeCreateRequest(SluggedCreateRequest):
    pass


class UnitTypeUpdateRequest(SluggedUpdateRequest):
    pass


class StructureCreateRequest(SluggedCreateRequest):
    structure_kind: StructureKind = "hierarchy"


class StructureUpdateRequest(SluggedUpdateRequest):
    structure_kind: StructureKind | None = None


class RelationTypeCreateRequest(SluggedCreateRequest):
    structure_id: str | None = None
    source_unit_type_id: str | None = None
    target_unit_type_id: str | None = None
    is_hierarchical: bool = True
    allow_cycles: bool = False


class RelationTypeUpdateRequest(SluggedUpdateRequest):
    structure_id: str | None = None
    source_unit_type_id: str | None = None
    target_unit_type_id: str | None = None
    is_hierarchical: bool | None = None
    allow_cycles: bool | None = None


class UnitCreateRequest(SluggedCreateRequest):
    unit_type_id: str | None = None
    parent_id: str | None = None


class UnitUpdateRequest(SluggedUpdateRequest):
    unit_type_id: str | None = None
    parent_id: str | None = None


class RelationCreateRequest(BaseModel):
    structure_id: str
    relation_type_id: str
    source_unit_id: str
    target_unit_id: str
    valid_from: datetime | None = None
    valid_until: datetime | None = None
    is_active: bool = True
    settings: dict[str, Any] = Field(default_factory=dict)
    change_request_id: str | None = None


class RelationUpdateRequest(BaseModel):
    structure_id: str | None = None
    relation_type_id: str | None = None
    source_unit_id: str | None = None
    target_unit_id: str | None = None
    valid_from: datetime | None = None
    valid_until: datetime | None = None
    is_active: bool | None = None
    settings: dict[str, Any] | None = None
    change_request_id: str | None = None


class FunctionTypeCreateRequest(SluggedCreateRequest):
    organization_unit_type_id: str | None = None
    delegable: bool = False
    act_in_place_allowed: bool = False


class FunctionTypeUpdateRequest(SluggedUpdateRequest):
    organization_unit_type_id: str | None = None
    delegable: bool | None = None
    act_in_place_allowed: bool | None = None


class FunctionCreateRequest(SluggedCreateRequest):
    organization_unit_id: str
    function_type_id: str | None = None
    delegable: bool | None = None
    act_in_place_allowed: bool | None = None


class FunctionUpdateRequest(SluggedUpdateRequest):
    organization_unit_id: str | None = None
    function_type_id: str | None = None
    delegable: bool | None = None
    act_in_place_allowed: bool | None = None


class FunctionAssignmentCreateRequest(BaseModel):
    identity_id: str
    function_id: str
    account_id: str | None = None
    applies_to_subunits: bool = False
    source: str = "direct"
    delegated_from_assignment_id: str | None = None
    acting_for_account_id: str | None = None
    valid_from: datetime | None = None
    valid_until: datetime | None = None
    is_active: bool = True
    settings: dict[str, Any] = Field(default_factory=dict)
    change_request_id: str | None = None


class FunctionAssignmentUpdateRequest(BaseModel):
    identity_id: str | None = None
    function_id: str | None = None
    account_id: str | None = None
    applies_to_subunits: bool | None = None
    source: str | None = None
    delegated_from_assignment_id: str | None = None
    acting_for_account_id: str | None = None
    valid_from: datetime | None = None
    valid_until: datetime | None = None
    is_active: bool | None = None
    settings: dict[str, Any] | None = None
    change_request_id: str | None = None