"""Pydantic request/response models."""
from __future__ import annotations

from datetime import datetime
from typing import Any, Literal

from pydantic import BaseModel, ConfigDict, Field


class _Base(BaseModel):
    model_config = ConfigDict(from_attributes=True)


# ── Auth ─────────────────────────────────────────────────────────────────────

class LoginRequest(BaseModel):
    username: str
    password: str


class TokenResponse(BaseModel):
    access_token: str
    token_type: str = "bearer"


# ── Source Profiles ──────────────────────────────────────────────────────────

class SourceProfileCreate(BaseModel):
    source_code: str
    source_name: str
    source_type: Literal["manual", "python_crawler", "api", "csv", "external_system"]
    description: str | None = None
    api_endpoint: str | None = None
    auth_method: str | None = None
    update_frequency: Literal["daily", "weekly", "monthly", "on_demand"] | None = None
    authority_level: int = Field(default=3, ge=1, le=5)
    enabled: bool = True
    metadata_jsonb: dict = Field(default_factory=dict)


class SourceProfileUpdate(BaseModel):
    source_name: str | None = None
    description: str | None = None
    authority_level: int | None = Field(default=None, ge=1, le=5)
    enabled: bool | None = None
    update_frequency: str | None = None


# ── Question Traces ──────────────────────────────────────────────────────────

class QuestionTraceCreate(BaseModel):
    question_text: str
    source: Literal["real", "simulated"] = "real"
    origin: str | None = None
    user_session: str | None = None
    asked_at: datetime | None = None


class QuestionTraceBatch(BaseModel):
    questions: list[QuestionTraceCreate]


class SimulationQuestion(BaseModel):
    question_text: str
    scenario_tags: list[str] = Field(default_factory=list)
    enabled: bool = True


class SimulationQuestionUpdate(BaseModel):
    question_text: str | None = None
    scenario_tags: list[str] | None = None
    enabled: bool | None = None


# ── Field Decisions ──────────────────────────────────────────────────────────

class FieldDecisionUpdate(BaseModel):
    field_decisions: dict[str, str]
    note: str | None = None


# ── Acquisition Tasks ────────────────────────────────────────────────────────

class AcquisitionTaskCreate(BaseModel):
    title: str
    description: str | None = None
    scenario_tags: list[str] = Field(default_factory=list)
    target_entity_types: list[str] = Field(default_factory=list)
    target_fields: list[str] = Field(default_factory=list)
    suggested_collection_method: str | None = None
    priority: int = Field(default=3, ge=1, le=5)
    due_at: datetime | None = None


class TaskFromGap(BaseModel):
    trace_id: int
    title: str | None = None
    priority: int = Field(default=3, ge=1, le=5)


class TaskAssign(BaseModel):
    assignee: str


class TaskComplete(BaseModel):
    result_summary: str | None = None


# ── Inventory ────────────────────────────────────────────────────────────────

class IssueResolve(BaseModel):
    resolution_note: str | None = None


# ── Vocabulary ───────────────────────────────────────────────────────────────

class VocabularyTermCreate(BaseModel):
    entity_type: str
    canonical_name: str
    aliases: list[str] = Field(default_factory=list)
    forbidden_aliases: list[str] = Field(default_factory=list)
    notes: str | None = None


class VocabularyTermUpdate(BaseModel):
    canonical_name: str | None = None
    aliases: list[str] | None = None
    forbidden_aliases: list[str] | None = None
    notes: str | None = None


# ── Conflicts ────────────────────────────────────────────────────────────────

class ConflictResolve(BaseModel):
    resolution: str
    chosen_value: Any | None = None
    note: str | None = None


# ── Aligner ──────────────────────────────────────────────────────────────────

class AlignSuggestRequest(BaseModel):
    candidate_ids: list[int]


class MergeEntities(BaseModel):
    note: str | None = None


# ── Rollback ─────────────────────────────────────────────────────────────────

class RollbackRequest(BaseModel):
    reason: str | None = None


# ── RBAC & Accounts (P1) ─────────────────────────────────────────────────────

class RoleCreate(BaseModel):
    role_key: str = Field(pattern=r"^[a-z][a-z0-9_]{1,30}$")
    label: str
    description: str | None = None
    sort_order: int | None = None


class RoleUpdate(BaseModel):
    label: str | None = None
    description: str | None = None
    sort_order: int | None = None


class CapabilityCreate(BaseModel):
    cap_key: str = Field(pattern=r"^[a-z][a-z0-9_]{1,40}$")
    label: str
    sort_order: int | None = None


class RoleCapCell(BaseModel):
    role_key: str
    cap_key: str
    value: str


class UserCreate(BaseModel):
    username: str = Field(min_length=3, max_length=120)
    password: str = Field(min_length=4, max_length=72)
    full_name: str | None = None
    phone: str | None = None
    status: str | None = None
    roles: list[str] = []


class UserUpdate(BaseModel):
    full_name: str | None = None
    phone: str | None = None
    status: str | None = None
    password: str | None = Field(default=None, min_length=4, max_length=72)
    roles: list[str] | None = None


class AreaUpdate(BaseModel):
    name: str | None = None
    note: str | None = None
    responsible_user_id: int | None = None


class UserAreasSet(BaseModel):
    area_ids: list[str] = []          # existing area ids picked from the tree
    custom_areas: list[str] = []      # free-text area names typed by admin