import os
import sys
from datetime import datetime, timedelta

import pytest
from fastapi.testclient import TestClient

PROJECT_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
if PROJECT_DIR not in sys.path:
    sys.path.insert(0, PROJECT_DIR)

import altcoin_db
import web_server


@pytest.fixture
def temp_db(monkeypatch, tmp_path):
    db_path = tmp_path / "altcoin_monitor.db"
    monkeypatch.setattr(altcoin_db, "DB_PATH", str(db_path))
    monkeypatch.setattr(web_server, "init_db", altcoin_db.init_db)
    monkeypatch.setattr(web_server, "get_review_stats", altcoin_db.get_review_stats)
    monkeypatch.setattr(web_server, "get_stats", altcoin_db.get_stats)
    altcoin_db.init_db()
    return db_path


def test_iteration_log_supports_rule_diff_and_effect_summary(temp_db):
    conn = altcoin_db.get_conn()
    base_time = datetime(2026, 4, 29, 10, 0, 0)
    for idx, (outcome, pnl) in enumerate([
        ("爆发", 12.5),
        ("失败", -4.2),
        ("横盘", 0.8),
    ], start=1):
        conn.execute(
            """
            INSERT INTO review_log (rec_id, symbol, review_time, outcome, pnl_48h, max_pnl_48h, triggered_signals, hit_signals, miss_signals, lesson)
            VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
            """,
            (
                idx,
                f"COIN{idx}/USDT",
                (base_time + timedelta(hours=idx)).isoformat(),
                outcome,
                pnl,
                10 + idx,
                '[]',
                '[]',
                '[]',
                f"lesson-{idx}"
            )
        )
    conn.commit()
    conn.close()

    altcoin_db.log_strategy_iteration(
        run_date="2026-04-29",
        trigger_source="daily_review",
        title="增加静K蓄力优先级",
        summary="基于漏选币复盘，提高静K蓄力相关因子的优先级。",
        findings=["静K蓄力类漏选较集中"],
        problems=["旧参数对蓄力型起爆敏感度不足"],
        actions=["提高静K蓄力权重并降低滞后信号优先级"],
        changed_rules=[{"field": "signal_weights.静K蓄力", "old": 1.0, "new": 1.6}],
        metrics={"reviews_done": 3},
        related_symbols=["PNT/USDT"],
        config_diff={
            "changed": [
                {"path": "signal_weights.静K蓄力", "old": 1.0, "new": 1.6},
                {"path": "meta.iteration_count", "old": 4, "new": 5},
            ],
            "added": [
                {"path": "learned_rules.rule_20260429_001", "new": {"description": "静K蓄力增强"}},
            ],
            "removed": []
        },
        effect_summary={
            "review_count_window": 3,
            "hit_rate_pct": 33.3,
            "avg_pnl": 3.03,
            "fail_rate_pct": 33.3,
            "flat_rate_pct": 33.3,
        }
    )

    logs = altcoin_db.get_strategy_iteration_logs(limit=5)
    assert logs[0]["config_diff"]["changed"][0]["path"] == "signal_weights.静K蓄力"
    assert logs[0]["effect_summary"]["avg_pnl"] == 3.03

    summary = altcoin_db.get_strategy_iteration_summary(days=30)
    assert summary["config_change_count"] == 3
    assert summary["effect_overview"]["avg_hit_rate_pct"] == 33.3


def test_review_api_returns_diff_and_effect_fields(temp_db):
    altcoin_db.log_strategy_iteration(
        run_date="2026-04-29",
        trigger_source="manual",
        title="补充diff与效果回看",
        summary="让网站能看见参数改了多少，以及改后效果。",
        findings=["用户需要参数审计"],
        problems=["之前只能看文字描述"],
        actions=["给迭代日志增加config_diff/effect_summary"],
        changed_rules=[],
        metrics={"items": 1},
        related_symbols=[],
        config_diff={"changed": [{"path": "review.min_samples", "old": 5, "new": 4}], "added": [], "removed": []},
        effect_summary={"review_count_window": 0, "hit_rate_pct": 0, "avg_pnl": 0},
    )

    client = TestClient(web_server.app)
    resp = client.get("/api/review")
    assert resp.status_code == 200
    data = resp.json()
    assert data["iteration_logs"][0]["config_diff"]["changed"][0]["path"] == "review.min_samples"
    assert "effect_overview" in data["iteration_summary"]