"""절전·재부팅 후 캔들 공백 백필 계획 테스트."""

from __future__ import annotations

from datetime import datetime, timedelta

from bithumb.data.gap_backfill import coverage_minutes, days_needed, plan_backfill


def test_coverage_and_days() -> None:
    assert coverage_minutes(1) == 180.0          # 200봉 × 1분 × 0.9
    assert coverage_minutes(15) == 2700.0
    assert days_needed(50) == 2                  # 1일 미만 공백 → ceil(0.03)+1
    assert days_needed(1500) == 3                # 1.04일 → 2+1


def test_plan_no_gap_within_incremental_range() -> None:
    now = datetime(2026, 9, 10, 8, 11)
    db = {"XRP": {1: now - timedelta(minutes=50), 15: now - timedelta(minutes=60)}}
    plan = plan_backfill(db, now=now, intervals=[1, 15])
    assert plan.empty and plan.describe() == "no gap"


def test_plan_detects_1m_gap_only() -> None:
    now = datetime(2026, 9, 10, 8, 11)
    # 1분봉 5시간 공백(> 180분) → 백필, 15분봉은 200봉(50h) 범위 내
    db = {
        "XRP": {1: now - timedelta(hours=5), 15: now - timedelta(hours=5)},
        "SUI": {1: now - timedelta(minutes=30), 15: now - timedelta(minutes=30)},
    }
    plan = plan_backfill(db, now=now, intervals=[1, 15])
    assert plan.needs == {"XRP": {1: 2}}
    assert plan.symbols() == ["XRP"] and plan.intervals() == [1] and plan.max_days() == 2


def test_plan_long_outage_multiple_intervals_and_cap() -> None:
    now = datetime(2026, 9, 20, 0, 0)
    db = {"ETH": {1: now - timedelta(days=5), 15: now - timedelta(days=5), 1440: now - timedelta(days=5)}}
    plan = plan_backfill(db, now=now, intervals=[1, 15, 1440], max_days=4)
    # 1m·15m은 5일 공백 → 6일 필요하나 상한 4일, 일봉은 200봉(180일) 범위 내
    assert plan.needs == {"ETH": {1: 4, 15: 4}}


def test_plan_skips_never_loaded_tables() -> None:
    now = datetime(2026, 9, 10, 8, 11)
    plan = plan_backfill({"NEW": {1: None, 15: None}}, now=now, intervals=[1, 15])
    assert plan.empty