from __future__ import annotations

import copy
import json
from datetime import date
from pathlib import Path

from server.aps_domain.closed_loop_runtime import run_closed_loop_candidate
from server.aps_domain.views import due_view
from server.state.packs import load_pack, list_packs


PACK_PATH = Path(__file__).resolve().parents[2] / "server" / "data" / "packs" / "optimize-simulation-v1.json"
RULES = ("EDD", "SPT", "PRIORITY", "FIFO", "LPT", "CR", "ATC")


def _next_id_factory():
    counters: dict[str, int] = {}

    def next_id(kind: str) -> int:
        counters[kind] = counters.get(kind, 0) + 1
        return counters[kind]

    return next_id


def test_simulation_world_pack_is_a_generic_aps_fixture():
    pack = json.loads(PACK_PATH.read_text(encoding="utf-8"))
    world = load_pack(str(PACK_PATH))

    assert pack["packVersion"] == 1
    assert pack["name"] == "Optimize synthetic debug V1"
    assert world["flexParams"]["dataGrade"] == "synthetic"
    assert len(world["flexOrders"]) == 10
    assert len(world["salesOrders"]) == 10
    assert len(world["flexRoutings"]) == 72
    assert len(world["flexEquipment"]) == 6
    assert all(row["source"] == "SYNTHETIC" for row in world["flexOrders"])
    assert {row["productCode"] for row in world["flexRoutings"]} == {
        row["productCode"] for row in world["flexOrders"]
    }
    assert any(item["file"] == PACK_PATH.name for item in list_packs())


def test_simulation_world_pack_runs_all_optimize_dispatch_rules():
    source_world = load_pack(str(PACK_PATH))

    for rule in RULES:
        world = copy.deepcopy(source_world)
        result = run_closed_loop_candidate(
            world,
            _next_id_factory(),
            business_date="2026-08-02",
            engine_type="OPTIMIZE",
            sort_mode=rule,
            strict=True,
        )

        assert result["solveStatus"] == "FEASIBLE", rule
        assert result["engineType"] == "OPTIMIZE", rule
        assert result["algorithmId"] == f"optimize.{rule.lower()}", rule
        assert result["orderCount"] == 10, rule
        assert result["vlCount"] == 10, rule
        assert result["woCount"] == 72, rule
        assert result["validation"]["valid"] is True, rule
        assert result["validation"]["hardViolations"] == [], rule


def test_simulation_world_pack_keeps_sales_order_fields_the_due_board_reads():
    """交期承诺看板直取订单客户字段，数据包必须按订单契约补齐（回归：/api/world/due 500）。"""
    world = load_pack(str(PACK_PATH))

    rows = due_view(world)

    assert len(rows) == len(world["salesOrders"]) == 10
    assert all(row["customerName"] and row["customerLevel"] for row in rows)
    assert all(isinstance(row["isRush"], bool) for row in rows)
    assert any(row["isRush"] for row in rows)                  # 至少一张插单，加急标记在 UI 有数据可验
    assert {row["customerLevel"] for row in rows} >= {"VIP", "A", "B", "C"}  # 等级过滤有数据可筛


def test_simulation_world_pack_timeline_follows_its_case_business_day():
    """回归：baseDate 必须是案例业务日，否则世界日期随运行日漂移、黄金测试输入每天变。

    源案例（kangni-simulation-package-v1）的业务日交期结构固定为「9 张逾期 + 最晚交期在业务日 +6 天」，
    世界日期整体贴着 baseDate 平移后，这个结构在任意运行日都应原样落在"今天"上。
    """
    world = load_pack(str(PACK_PATH))
    due_dates = sorted(date.fromisoformat(order["dueDate"]) for order in world["flexOrders"])
    today = date.today()

    assert (due_dates[-1] - today).days == 6           # 最晚交期 = 案例业务日 +6 天
    assert sum(1 for due in due_dates if due < today) == 9   # 案例本身是 9 张逾期单