from __future__ import annotations

from datetime import datetime
from typing import Any, Literal

from pydantic import BaseModel, ConfigDict, Field

from govoplan_core.api.v1.schemas import DeltaDeletedItem, NavigationPreferencesPayload
from govoplan_core.i18n import REFERENCE_LANGUAGE_CODE


class TenantAdminItem(BaseModel):
    id: str
    slug: str = Field(min_length=1, max_length=100)
    name: str = Field(min_length=1, max_length=255)
    description: str | None = None
    default_locale: str = Field(
        default=REFERENCE_LANGUAGE_CODE,
        min_length=1,
        max_length=20,
    )
    settings: dict[str, Any] = Field(default_factory=dict)
    allow_custom_groups: bool | None = None
    allow_custom_roles: bool | None = None
    allow_api_keys: bool | None = None
    effective_governance: dict[str, bool] = Field(default_factory=dict)
    is_active: bool
    counts: dict[str, int] = Field(default_factory=dict)
    created_at: datetime
    updated_at: datetime


class TenantListResponse(BaseModel):
    tenants: list[TenantAdminItem]
    total: int = 0
    page: int = 1
    page_size: int = 100
    pages: int = 1


class TenantListDeltaResponse(TenantListResponse):
    tenants: list[TenantAdminItem] = Field(default_factory=list)
    deleted: list[DeltaDeletedItem] = Field(default_factory=list)
    watermark: str | None = None
    has_more: bool = False
    full: bool = False


class TenantOwnerCandidate(BaseModel):
    account_id: str
    email: str
    display_name: str | None = None


class TenantOwnerCandidateListResponse(BaseModel):
    accounts: list[TenantOwnerCandidate]


class TenantCreateRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")

    slug: str
    name: str
    owner_account_id: str | None = None
    description: str | None = None
    default_locale: str = REFERENCE_LANGUAGE_CODE
    settings: dict[str, Any] = Field(default_factory=dict)
    allow_custom_groups: bool | None = None
    allow_custom_roles: bool | None = None
    allow_api_keys: bool | None = None


class TenantUpdateRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")

    name: str | None = Field(default=None, min_length=1, max_length=255)
    description: str | None = None
    default_locale: str | None = Field(default=None, min_length=1, max_length=20)
    settings: dict[str, Any] | None = None
    allow_custom_groups: bool | None = None
    allow_custom_roles: bool | None = None
    allow_api_keys: bool | None = None
    is_active: bool | None = None


class TenantLifecycleIssue(BaseModel):
    severity: Literal["blocker", "warning", "info"]
    code: str
    message: str
    module_id: str | None = None
    details: dict[str, Any] = Field(default_factory=dict)


class TenantDeletionPlanResponse(BaseModel):
    tenant_id: str
    action: Literal["retire", "destroy"] = "retire"
    allowed: bool
    destructive_supported: bool = False
    issues: list[TenantLifecycleIssue] = Field(default_factory=list)
    counts: dict[str, int] = Field(default_factory=dict)


class TenantDeleteRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")

    mode: Literal["retire", "destroy"] = "retire"
    reason: str | None = None


class TenantLifecycleResponse(BaseModel):
    item: TenantAdminItem
    plan: TenantDeletionPlanResponse


class TenantContextSwitchRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")

    tenant_id: str


class TenantContextSwitchResponse(BaseModel):
    account_id: str
    membership_id: str
    tenant_id: str
    session_id: str | None = None


class TenantSettingsItem(BaseModel):
    id: str
    slug: str
    name: str
    default_locale: str = Field(
        default=REFERENCE_LANGUAGE_CODE,
        min_length=1,
        max_length=20,
    )
    available_languages: list[dict[str, Any]] = Field(default_factory=list)
    system_enabled_language_codes: list[str] = Field(default_factory=list)
    enabled_language_codes: list[str] = Field(default_factory=list)
    navigation: NavigationPreferencesPayload | None = None
    appearance_palette: Literal["default", "civic_blue", "forest", "plum"] | None = None
    appearance_palette_locked: bool = False
    system_appearance_palette: Literal["default", "civic_blue", "forest", "plum"] = "default"
    system_appearance_palette_locked: bool = False
    effective_appearance_palette: Literal["default", "civic_blue", "forest", "plum"] = "default"
    effective_appearance_source: Literal["tenant", "system", "tenant_lock", "system_lock"] = "system"
    appearance_custom_overrides_allowed: bool | None = None
    system_appearance_custom_overrides_allowed: bool = False
    effective_appearance_custom_overrides_allowed: bool = False
    settings: dict[str, Any] = Field(default_factory=dict)


class TenantSettingsDeltaResponse(BaseModel):
    item: TenantSettingsItem | None = None
    sections: dict[str, Any] = Field(default_factory=dict)
    changed_sections: list[str] = Field(default_factory=list)
    deleted: list[DeltaDeletedItem] = Field(default_factory=list)
    watermark: str | None = None
    has_more: bool = False
    full: bool = False


class TenantSettingsUpdateRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")

    default_locale: str = Field(min_length=1, max_length=20)
    enabled_language_codes: list[str] | None = None
    navigation: NavigationPreferencesPayload | None = None
    appearance_palette: Literal["default", "civic_blue", "forest", "plum"] | None = None
    appearance_palette_locked: bool | None = None
    appearance_custom_overrides_allowed: bool | None = None