from dataclasses import dataclass, field
from datetime import date, datetime
from enum import Enum
from typing import List, Optional
 
class Level(Enum): JUNIOR="начинающий"; MIDDLE="средний"; SENIOR="продвинутый"
class Role(Enum): DEVELOPER="разработчик"; TESTER="тестировщик"; ANALYST="аналитик"; MANAGER="менеджер"
class Complexity(Enum): LOW="низкая"; MEDIUM="средняя"; HIGH="высокая"
class Priority(Enum): LOW="низкий"; MEDIUM="средний"; HIGH="высокий"
 
@dataclass
class Employee:
    fio: str; role: Role; level: Level
    def __str__(self): return f"Сотрудник: {self.fio} | роль: {self.role.value} | категория: {self.level.value}"
 
@dataclass
class Task:
    description: str; start: date; finish: date; complexity: Complexity; priority: Priority
    assignee: Optional[Employee]=None; project_name: Optional[str]=None
    def __post_init__(self):
        if self.finish < self.start: raise ValueError("Дата окончания задачи не может быть раньше даты начала.")
    def __str__(self):
        who = self.assignee.fio if self.assignee else "не назначен"
        return (f"Задача: {self.description} ({self.start} → {self.finish}) | "
                f"сложность: {self.complexity.value} | приоритет: {self.priority.value} | исполнитель: {who}")
 
@dataclass
class Project:
    name: str; start: date; finish: date; tasks: List[Task]=field(default_factory=list)
    def add_task(self, task: Task):
        if task.start < self.start or task.finish > self.finish:
            raise ValueError(f"Сроки задачи {task.start}–{task.finish} вне диапазона проекта {self.start}–{self.finish}.")
        task.project_name=self.name; self.tasks.append(task)
    def tasks_in_execution_order(self):
        pr = {Priority.HIGH:0, Priority.MEDIUM:1, Priority.LOW:2}
        return sorted(self.tasks, key=lambda t:(t.start, pr[t.priority]))
    def __str__(self): return f"Проект: {self.name} ({self.start} → {self.finish}) | задач: {len(self.tasks)}"
 
d = lambda s: datetime.strptime(s,"%Y-%m-%d").date()
 
print("=== 1) Создание проекта ===")
project = Project("CRM-платформа", d("2025-01-10"), d("2025-03-31"))
print(project, "\n")
 
print("=== 2) Добавление сотрудников ===")
e1 = Employee("Иванов И.И.", Role.DEVELOPER, Level.MIDDLE)
e2 = Employee("Петров П.П.", Role.TESTER, Level.JUNIOR)
print(e1); print(e2, "\n")
 
print("=== 3) Добавление задач ===")
t1 = Task("API авторизации", d("2025-01-15"), d("2025-01-31"), Complexity.MEDIUM, Priority.HIGH, e1)
t2 = Task("Тесты для авторизации", d("2025-02-01"), d("2025-02-07"), Complexity.LOW, Priority.MEDIUM, e2)
project.add_task(t1); project.add_task(t2)
print(t1); print(t2, "\n")
 
print("=== 4) Вывод задач в порядке выполнения ===")
for t in project.tasks_in_execution_order(): print(" -", t)
print()
 
print("=== 5) Негативный сценарий ===")
try:
    bad = Task("Отчетность", d("2025-04-01"), d("2025-04-05"), Complexity.LOW, Priority.LOW, e2)
    project.add_task(bad)
except ValueError as ex:
    print("ОЖИДАЕМАЯ ОШИБКА:", ex)

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