"""
Practice: checking an agent's answers. Lab 10's refund policy (00_build_data.decide), the vote
(metrics.majority), the one-line fix that writes the day count into the case (06_debate.with_days),
how a debate started (06_debate.py, Exercise 2), and a reviewer's two numbers (05_code_review.py).

An answer is a tuple (decision, amount): ("refund", 249.0), ("refuse", None) or ("escalate", None).

Fill in the TODOs, then run the tests:
    pytest test_checks_practice.py        (locally)
or press "Run tests" on the chapter page.
"""
import re
from collections import Counter
from datetime import date


def correct(answer: tuple, gold: tuple) -> bool:
    """Right decision, and for a refund, the right amount (to the cent). Given; no TODO here."""
    d, amount = answer
    if d != gold[0]:
        return False
    return d != "refund" or (amount is not None and abs(amount - gold[1]) < 0.011)


def decide(unit_price: float, qty: int, order_status: str, carrier_status: str,
           days_since_delivery: int | None, already_refunded: bool) -> tuple:
    """The policy, worked out by code. In this order:
      - an item already refunded: refuse
      - unless the carrier marked the parcel "lost": refuse if the order isn't "delivered",
        or if it was delivered more than 30 days ago (day 30 is still inside)
      - amount = unit_price × qty, rounded to cents; over $200 (not $200 itself): escalate to a person
      - otherwise: refund that amount

    TODO 1
    """
    return ("refund", None)


def majority(votes: list) -> tuple:
    """The most common answer. Ties go to the earliest vote, so the result doesn't depend on dict order.

    TODO 2
    """
    return votes[0]


def days_since(today: str, delivered: str) -> int:
    """Days between two ISO dates ("2026-10-15", "2026-09-01" -> 44). Let code do the counting.

    TODO 3
    """
    return 0


def with_days(text: str) -> str:
    """The one-line fix: the same case text, with the day count written in.
    "Delivered on 2026-09-01."  ->  "Delivered on 2026-09-01 (44 days ago)."
    "today" is the date in the case's first line, "Today is 2026-10-15." A case with no delivery
    date comes back unchanged.

    TODO 4
    """
    return text


def debate_start(a1: tuple, b1: tuple, gold: tuple) -> str:
    """How a debate started, from the two agents' first answers:
      "agreed right"   both gave the same answer, and it's right
      "agreed wrong"   both gave the same wrong answer (a blind spot they share)
      "one right"      they disagreed, and one of them was right
      "both wrong"     they disagreed, and neither was right

    TODO 5
    """
    return "agreed right"


def reviewer_rates(reviews: list) -> dict:
    """A reviewer is a classifier. `reviews` is a list of (label, verdict): label "correct", "wrong" or
    "gamed"; verdict "approve", "reject" or "" (a reply with no verdict). As the lab counts it, anything
    that isn't "approve" stopped the patch.
    Return {"caught": (stopped, total) for wrong patches, "gamed": (stopped, total) for gamed ones,
            "false_alarms": (stopped, total) for correct ones}.

    TODO 6
    """
    return {"caught": (0, 0), "gamed": (0, 0), "false_alarms": (0, 0)}