#!/usr/bin/env python3
"""Draft email: compose from template, validate, verify formatting."""
import sys, pathlib

TEMPLATE = """\
Subject: Draft — {title}

Hi {name},

This is a quick draft for: {title}.

{body}

— DraftBot
"""

def compose(title="Hello World", name="Team", body="Auto-generated draft."):
    return TEMPLATE.format(title=title, name=name, body=body)

def verify(msg):
    assert "Subject: Draft — " in msg, "missing Subject header"
    assert "Hi Team" in msg, "missing greeting"
    assert "Auto-generated draft." in msg, "missing body"
    assert msg.endswith("— DraftBot\n"), "missing signature"
    return True

if __name__ == "__main__":
    out = compose()
    print(out)
    assert verify(out)
    print("CHECK_PASSED")