"""Pydantic schemas for graph API requests and responses."""


from pydantic import BaseModel, Field

from .agent import AgentCreateRequest


class Position(BaseModel):
    """Node position on the canvas."""

    x: float = 0.0
    y: float = 0.0


class EdgeDefinition(BaseModel):
    """Definition of a graph edge."""

    source: str
    target: str
    weight: float = 1.0
    condition: str | None = None  # Named condition: "always", "source_success", etc.
    label: str | None = None


class GraphSaveRequest(BaseModel):
    """Request body for creating/saving a graph."""

    name: str
    description: str = ""
    agents: list[AgentCreateRequest] = Field(default_factory=list)
    edges: list[EdgeDefinition] = Field(default_factory=list)
    positions: dict[str, Position] = Field(default_factory=dict)
    start_node: str | None = None
    end_node: str | None = None
    task_query: str = ""


class GraphResponse(BaseModel):
    """Graph response returned by the API."""

    graph_id: str
    name: str
    description: str = ""
    agents: list[AgentCreateRequest] = Field(default_factory=list)
    edges: list[EdgeDefinition] = Field(default_factory=list)
    positions: dict[str, Position] = Field(default_factory=dict)
    start_node: str | None = None
    end_node: str | None = None
    task_query: str = ""
    created_at: str = ""
    updated_at: str = ""
    validation_errors: list[str] = Field(default_factory=list)


class GraphListItem(BaseModel):
    """Minimal graph info for listing."""

    graph_id: str
    name: str
    description: str = ""
    agent_count: int = 0
    edge_count: int = 0
    created_at: str = ""
    updated_at: str = ""


class GraphValidationResponse(BaseModel):
    """Response from graph validation."""

    is_valid: bool
    errors: list[str] = Field(default_factory=list)
    warnings: list[str] = Field(default_factory=list)
    execution_order: list[str] = Field(default_factory=list)