"""Pydantic models for form generator API."""
from typing import Any, Dict, List, Optional
from pydantic import BaseModel, Field


class GenerateFormRequest(BaseModel):
    """Request for full form generation from description."""
    description: str = Field(description="User description of the form to generate")
    conversation_context: Optional[List[str]] = Field(default=None, description="Recent chat messages for context")
    user_goals: Optional[List[str]] = Field(default=None, description="User-stated goals for the form")
    preferred_field_types: Optional[List[str]] = Field(default=None, description="Preferred field types to favor")
    must_have_logic: Optional[bool] = Field(default=None, description="Whether conditional logic is required")


class FormFieldRef(BaseModel):
    """Minimal field representation for refine context."""
    id: str = ""
    type: str = ""
    label: str = ""
    required: bool = False
    placeholder: Optional[str] = None
    description: Optional[str] = None
    options: Optional[List[Dict[str, Any]]] = None
    settings: Optional[Dict[str, Any]] = None
    validation: Optional[Dict[str, Any]] = None
    conditionalLogic: Optional[Dict[str, Any]] = None


class RefineFormRequest(BaseModel):
    """Request for surgical refine (diff) of existing form."""
    user_request: str = Field(description="User's edit request in plain language")
    current_fields: List[Dict[str, Any]] = Field(description="Current form fields as JSON-serializable list")
    current_title: str = Field(default="", description="Current form title")
    conversation_context: Optional[List[str]] = Field(default=None, description="Recent chat messages for context")


class RefineDiffChange(BaseModel):
    """Partial update for an existing field (only include keys that changed)."""
    id: str
    label: Optional[str] = None
    required: Optional[bool] = None
    placeholder: Optional[str] = None
    description: Optional[str] = None
    options: Optional[List[Dict[str, Any]]] = None
    settings: Optional[Dict[str, Any]] = None
    validation: Optional[Dict[str, Any]] = None
    conditionalLogic: Optional[Dict[str, Any]] = None


class RefineDiffAddition(BaseModel):
    """New field to add (must have id, type, label, required)."""
    id: str
    type: str
    label: str
    required: bool = False
    placeholder: Optional[str] = None
    description: Optional[str] = None
    options: Optional[List[Dict[str, Any]]] = None
    settings: Optional[Dict[str, Any]] = None
    validation: Optional[Dict[str, Any]] = None


class RefineDiff(BaseModel):
    """Diff returned by refine: changes, additions, removals."""
    changes: List[Dict[str, Any]] = Field(default_factory=list)
    additions: List[Dict[str, Any]] = Field(default_factory=list)
    removals: List[str] = Field(default_factory=list)


class GenerateFormResponse(BaseModel):
    """Response from generate-form: form JSON and metadata."""
    formJSON: Dict[str, Any] = Field(description="Form with title, description?, fields")
    metadata: Dict[str, Any] = Field(default_factory=dict)
    warnings: Optional[List[str]] = None


class RefineFormResponse(BaseModel):
    """Response from refine-form: diff only."""
    diff: RefineDiff = Field(description="Changes, additions, removals")


class PlanFormQuestionOption(BaseModel):
    """Single option for a select/radio clarification question."""
    value: str = Field(description="Option value")
    label: str = Field(description="Display label")


class PlanFormQuestion(BaseModel):
    """One clarifying question to show before generate/refine."""
    id: str = Field(description="Unique id for the question")
    label: str = Field(description="Question text")
    type: str = Field(default="single", description="single | multi | text")
    options: Optional[List[PlanFormQuestionOption]] = Field(default=None)
    required: bool = Field(default=True)


class PlanFormRequest(BaseModel):
    """Request for plan-form-request (clarification planning)."""
    description: str = Field(description="User description of the form they want")
    current_fields: Optional[List[Dict[str, Any]]] = Field(default=None)
    current_title: Optional[str] = Field(default="")


class PlanFormResponse(BaseModel):
    """Response from plan-form-request."""
    should_ask_questions: bool = Field(description="Whether to show clarifying questions")
    questions: List[PlanFormQuestion] = Field(default_factory=list)
    reasoning_summary: str = Field(default="", description="Short summary for UI status")