"""Schemas for project template API endpoints."""
from typing import Optional, List, Any
from datetime import datetime
from pydantic import BaseModel, Field


class TaskStatusDefinition(BaseModel):
    """Task status definition for templates."""
    name: str = Field(..., min_length=1, max_length=50)
    color: str = Field(default="#808080", pattern=r"^#[0-9A-Fa-f]{6}$")
    position: int = Field(default=0, ge=0)
    is_done: bool = Field(default=False)


class CustomFieldDefinition(BaseModel):
    """Custom field definition for templates."""
    name: str = Field(..., min_length=1, max_length=100)
    field_type: str = Field(..., pattern=r"^(text|number|dropdown|date|person|formula)$")
    options: Optional[List[str]] = None
    formula: Optional[str] = None
    is_required: bool = Field(default=False)
    position: int = Field(default=0, ge=0)


class ProjectTemplateBase(BaseModel):
    """Base schema for project template."""
    name: str = Field(..., min_length=1, max_length=200)
    description: Optional[str] = None
    is_public: bool = Field(default=False)
    task_statuses: Optional[List[TaskStatusDefinition]] = None
    custom_fields: Optional[List[CustomFieldDefinition]] = None
    default_security_level: Optional[str] = Field(
        default="department",
        pattern=r"^(public|department|confidential)$"
    )


class ProjectTemplateCreate(ProjectTemplateBase):
    """Schema for creating a project template."""
    pass


class ProjectTemplateUpdate(BaseModel):
    """Schema for updating a project template."""
    name: Optional[str] = Field(None, min_length=1, max_length=200)
    description: Optional[str] = None
    is_public: Optional[bool] = None
    task_statuses: Optional[List[TaskStatusDefinition]] = None
    custom_fields: Optional[List[CustomFieldDefinition]] = None
    default_security_level: Optional[str] = Field(
        None,
        pattern=r"^(public|department|confidential)$"
    )


class ProjectTemplateResponse(ProjectTemplateBase):
    """Schema for project template response."""
    id: str
    owner_id: str
    is_active: bool
    created_at: datetime
    updated_at: datetime

    class Config:
        from_attributes = True


class ProjectTemplateWithOwner(ProjectTemplateResponse):
    """Project template response with owner details."""
    owner_name: Optional[str] = None


class ProjectTemplateListResponse(BaseModel):
    """Response schema for listing project templates."""
    templates: List[ProjectTemplateWithOwner]
    total: int


class CreateProjectFromTemplateRequest(BaseModel):
    """Request schema for creating a project from a template."""
    template_id: str
    title: str = Field(..., min_length=1, max_length=500)
    description: Optional[str] = Field(None, max_length=10000)
    space_id: str
    department_id: Optional[str] = None


class CreateProjectFromTemplateResponse(BaseModel):
    """Response schema for project created from template."""
    id: str
    title: str
    template_id: str
    template_name: str
    task_statuses_created: int
    custom_fields_created: int