"""Pydantic schemas for Project, SubProject, ProjectFunctionGroup, ProjectFunction."""

from datetime import datetime
from pydantic import BaseModel, Field


# ===== Project Schemas =====

class ProjectCreateRequest(BaseModel):
    """Request body for creating a new project."""
    name: str = Field(..., max_length=255)
    description: str | None = None
    status: str = Field("draft", max_length=20)
    start_date: datetime | None = None
    end_date: datetime | None = None
    budget: float | None = None
    total_costs: float = 0.0
    notes: str | None = None
    custom_fields: str | None = None
    custom_field_defs: str | None = None


class ProjectUpdateRequest(BaseModel):
    """Request body for updating an existing project."""
    name: str | None = Field(None, max_length=255)
    description: str | None = None
    status: str | None = Field(None, max_length=20)
    start_date: datetime | None = None
    end_date: datetime | None = None
    budget: float | None = None
    total_costs: float | None = None
    notes: str | None = None
    custom_fields: str | None = None
    custom_field_defs: str | None = None


class ProjectResponse(BaseModel):
    """Public project representation."""
    id: str
    account_id: str
    name: str
    description: str | None = None
    status: str
    start_date: datetime | None = None
    end_date: datetime | None = None
    budget: float | None = None
    total_costs: float = 0.0
    notes: str | None = None
    custom_fields: str | None = None
    custom_field_defs: str | None = None
    created_at: datetime
    updated_at: datetime

    model_config = {"from_attributes": True}


class ProjectListResponse(BaseModel):
    """Paginated list of projects."""
    items: list[ProjectResponse]
    total: int
    page: int
    size: int


# ===== SubProject Schemas =====

class SubProjectCreateRequest(BaseModel):
    """Request body for creating a subproject."""
    name: str = Field(..., max_length=255)
    parent_id: str | None = None
    sort_order: int = 0


class SubProjectUpdateRequest(BaseModel):
    """Request body for updating a subproject."""
    name: str | None = Field(None, max_length=255)
    parent_id: str | None = None
    sort_order: int | None = None


class SubProjectResponse(BaseModel):
    """Public subproject representation."""
    id: str
    name: str
    project_id: str
    parent_id: str | None = None
    sort_order: int = 0

    model_config = {"from_attributes": True}


class SubProjectListResponse(BaseModel):
    """Paginated list of subprojects."""
    items: list[SubProjectResponse]
    total: int
    page: int
    size: int


# ===== ProjectFunctionGroup Schemas =====

class ProjectFunctionGroupCreateRequest(BaseModel):
    """Request body for creating a function group."""
    name: str = Field(..., max_length=255)
    sort_order: int = 0


class ProjectFunctionGroupUpdateRequest(BaseModel):
    """Request body for updating a function group."""
    name: str | None = Field(None, max_length=255)
    sort_order: int | None = None


class ProjectFunctionGroupResponse(BaseModel):
    """Public function group representation."""
    id: str
    name: str
    project_id: str
    sort_order: int = 0

    model_config = {"from_attributes": True}


class ProjectFunctionGroupListResponse(BaseModel):
    """Paginated list of function groups."""
    items: list[ProjectFunctionGroupResponse]
    total: int
    page: int
    size: int


# ===== ProjectFunction Schemas =====

class ProjectFunctionCreateRequest(BaseModel):
    """Request body for creating a project function."""
    name: str = Field(..., max_length=255)
    quantity: float = 1.0
    daily_costs: float = 0.0
    total_costs: float = 0.0
    sort_order: int = 0


class ProjectFunctionUpdateRequest(BaseModel):
    """Request body for updating a project function."""
    name: str | None = Field(None, max_length=255)
    quantity: float | None = None
    daily_costs: float | None = None
    total_costs: float | None = None
    sort_order: int | None = None


class ProjectFunctionResponse(BaseModel):
    """Public project function representation."""
    id: str
    name: str
    function_group_id: str
    quantity: float = 1.0
    daily_costs: float = 0.0
    total_costs: float = 0.0
    sort_order: int = 0

    model_config = {"from_attributes": True}


class ProjectFunctionListResponse(BaseModel):
    """Paginated list of project functions."""
    items: list[ProjectFunctionResponse]
    total: int
    page: int
    size: int