"""Versioned contracts for scheduling workbooks and the profile-driven intake template."""
from __future__ import annotations

import copy
import json
from io import BytesIO

import pytest
from fastapi.testclient import TestClient
from openpyxl import load_workbook

from server.aps_domain.report_contracts import (
    PLAN_REPORT_CONTRACT,
    REPORT_CONTRACTS,
    SCHEDULE_BLOCKED_CONTRACT,
    SCHEDULE_EQUIPMENT_CONTRACT,
    SCHEDULE_ORDER_CONTRACT,
    contract_digest,
    contract_summary,
    validate_workbook_contract,
)
from server.aps_domain.reports import (
    build_plan_report,
    build_schedule_equipment_export,
    build_schedule_order_export,
)
from server.engines import PoolEngine
from server.importers.template_workbook import (
    build_intake_template,
    template_contract,
    validate_intake_template,
)
from server.importers.workbook_profiles import builtin_compatibility_profile
from server.state.seed import empty_world, seed_world


class _MemStore:
    def __init__(self, data: dict, path: str = "<mem>"):
        self.data = data
        self.path = path

    def next_id(self, kind: str) -> int:
        key = f"_c_{kind}"
        self.data[key] = self.data.get(key, 100) + 1
        return self.data[key]

    def save(self):
        pass


def _world_with_version() -> dict:
    world = empty_world()
    world["flexScheduleVersions"] = [{
        "id": 5, "versionNo": "V-CONTRACT-001", "sortMode": "BOTTLENECK", "solveStatus": "SOLVED",
        "demandCount": 2, "admittedDemandCount": 2, "unscheduledDemandCount": 0,
    }]
    world["flexOrders"] = [
        {"orderNo": "SO-C1", "productCode": "P-C1", "quantity": 10, "dueDate": "2031-02-10"},
        {"orderNo": "SO-C2", "productCode": "P-C2", "quantity": 5, "dueDate": "2031-02-12"},
    ]
    world["flexVirtualLines"] = [
        {"versionId": 5, "orderNo": "SO-C1", "productCode": "P-C1", "quantity": 10,
         "plannedStart": "2031-02-06 08:00", "plannedEnd": "2031-02-07 12:00"},
        {"versionId": 5, "orderNo": "SO-C2", "productCode": "P-C2", "quantity": 5,
         "plannedStart": "2031-02-06 13:00", "plannedEnd": "2031-02-06 18:00"},
    ]
    world["flexWorkOrders"] = [{
        "versionId": 5, "flexOrderNo": "SO-C1", "orderNo": "WO-C1-1", "productCode": "P-C1", "seq": 1,
        "operationCode": "CUT", "operationName": "下料", "equipmentCode": "EQ-C1",
        "equipmentName": "切割机", "zone": "Z1", "moldCode": "M1", "changeoverMin": 5, "moveMin": 2,
        "runMin": 30, "plannedStartTime": "2031-02-06 08:00", "plannedEndTime": "2031-02-06 08:37",
        "isBottleneck": True, "status": "PLANNED", "quantity": 10,
    }]
    return world


def _scheduled_world() -> dict:
    world = seed_world()
    counters: dict[str, int] = {}

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

    PoolEngine().solve(world, next_id, sort_mode="BOTTLENECK")
    return world


def test_report_contracts_declare_every_sheet_and_column():
    plan = PLAN_REPORT_CONTRACT.sheets["plan"]
    assert plan.name == "工作计划"
    assert (plan.title_row, plan.header_row, plan.data_start_row) == (1, 4, 5)
    assert plan.freeze_panes == "A5" and plan.auto_filter
    assert plan.headers == (
        "订单号", "产品编码", "数量", "交期", "序", "工序编码", "工序名称",
        "工位/设备", "设备编码", "区域", "模具", "换型(分)", "移栽(分)", "加工(分)",
        "计划开始", "计划结束", "瓶颈", "状态",
    )
    assert PLAN_REPORT_CONTRACT.sheets["overview"].header_row == 12
    assert PLAN_REPORT_CONTRACT.sheets["conflicts"].header_row == 3
    assert SCHEDULE_ORDER_CONTRACT.sheets["orders"].headers == (
        "订单号", "工单号", "产品编码", "工序编码", "工序名称", "资源编码", "资源名称",
        "计划开始", "计划结束", "状态", "预计数量", "实际数量",
    )
    assert SCHEDULE_EQUIPMENT_CONTRACT.sheets["equipment"].headers == (
        "设备编码", "设备名称", "工序编码", "工序名称", "占用开始", "占用结束", "负荷分钟", "利用率%",
    )
    assert SCHEDULE_BLOCKED_CONTRACT.sheets["blocked"].headers == (
        "阻断类型", "对象", "严重度", "说明", "修复建议",
    )
    assert {contract.id for contract in REPORT_CONTRACTS.values()} == {
        "schedule-plan.v1", "schedule-order.v1", "schedule-equipment.v1", "schedule-blocked.v1",
    }
    summary = {row["id"]: row for row in contract_summary()}
    assert summary["schedule-plan.v1"]["schemaVersion"] == 1
    assert len(contract_digest()) == 64


def test_generated_plan_report_matches_contract_and_is_deterministic():
    report = build_plan_report(_world_with_version())
    assert report["templateId"] == "schedule-plan.v1"
    assert report["templateSchemaVersion"] == 1
    assert validate_workbook_contract(report["xlsxBytes"], PLAN_REPORT_CONTRACT) == []
    assert build_plan_report(_world_with_version())["xlsxBytes"] == report["xlsxBytes"]
    workbook = load_workbook(BytesIO(report["xlsxBytes"]))
    assert workbook.sheetnames == ["工作计划", "方案概览", "冲突"]
    assert workbook["工作计划"].freeze_panes == "A5"
    assert workbook["工作计划"].auto_filter.ref == "A4:R5"
    workbook.close()


def test_plan_report_without_work_orders_uses_the_blocked_contract():
    world = _world_with_version()
    world["flexWorkOrders"] = []
    report = build_plan_report(world)
    assert report["blocked"] is True
    assert report["templateId"] == "schedule-blocked.v1"
    assert validate_workbook_contract(report["xlsxBytes"], SCHEDULE_BLOCKED_CONTRACT) == []
    assert build_plan_report(world)["xlsxBytes"] == report["xlsxBytes"]


def test_plan_report_without_any_version_keeps_the_declared_empty_state():
    report = build_plan_report(empty_world())
    assert report["xlsxBytes"] is None and report["filename"] is None
    assert report["contract"]["reason"] == "no-flexible-version"


def test_schedule_order_and_equipment_exports_match_their_contracts():
    world = _scheduled_world()
    before = copy.deepcopy(world)
    order = build_schedule_order_export(world)
    equipment = build_schedule_equipment_export(world)
    assert order["templateId"] == "schedule-order.v1"
    assert equipment["templateId"] == "schedule-equipment.v1"
    assert validate_workbook_contract(order["xlsxBytes"], SCHEDULE_ORDER_CONTRACT) == []
    assert validate_workbook_contract(equipment["xlsxBytes"], SCHEDULE_EQUIPMENT_CONTRACT) == []
    assert world == before


def test_contract_validator_reports_missing_sheets_and_wrong_headers():
    report = build_plan_report(_world_with_version())
    workbook = load_workbook(BytesIO(report["xlsxBytes"]))
    workbook.remove(workbook["方案概览"])
    workbook["工作计划"].cell(4, 1, "订单号（被改动）")
    buffer = BytesIO()
    workbook.save(buffer)
    workbook.close()
    defects = validate_workbook_contract(buffer.getvalue(), PLAN_REPORT_CONTRACT)
    assert any("方案概览" in defect for defect in defects)
    assert any("订单号" in defect for defect in defects)


def test_intake_template_is_profile_driven_and_round_trips_through_preview():
    profile = builtin_compatibility_profile()
    template = build_intake_template()
    assert template["profileId"] == profile["id"]
    assert template["profileDigest"] == profile["profileDigest"]
    assert template["intakeSheet"] == "数据采集说明"
    assert template["sheetNames"] == [spec["name"] for spec in profile["sheets"].values()]
    assert validate_intake_template(template["xlsxBytes"], profile) == []
    workbook = load_workbook(BytesIO(template["xlsxBytes"]))
    assert workbook.sheetnames[0] == "数据采集说明"
    assert workbook.sheetnames[1:] == template["sheetNames"]
    assert profile["id"] in str(workbook["数据采集说明"]["A2"].value)
    for role, spec in profile["sheets"].items():
        sheet = workbook[spec["name"]]
        headers = [cell.value for cell in sheet[1]]
        assert headers == list(spec["columns"].values()), role
        assert sheet.freeze_panes == "A2"
    workbook.close()

    from server.aps_domain.importers import preview_file

    preview = preview_file("blank-template.xlsx", template["xlsxBytes"], empty_world())
    assert preview["totalOk"] == 0
    assert [batch["sheet"] for batch in preview["batches"]] == template["sheetNames"]
    assert all(batch["sourceProfile"] == profile["id"] for batch in preview["batches"])
    assert all(batch["profileDigest"] == profile["profileDigest"] for batch in preview["batches"])
    assert all(batch["fieldMap"] for batch in preview["batches"])


def test_intake_template_examples_come_from_the_supplied_world_and_stay_deterministic():
    profile = builtin_compatibility_profile()
    world = seed_world()
    first = build_intake_template(include_examples=True, world=world)
    second = build_intake_template(include_examples=True, world=world)
    assert first["xlsxBytes"] == second["xlsxBytes"]
    assert first["sha256"] == second["sha256"]
    assert first["rows"]["equipment"] == min(3, len(world["flexEquipment"]))
    workbook = load_workbook(BytesIO(first["xlsxBytes"]))
    sheet = workbook[profile["sheets"]["equipment"]["name"]]
    assert sheet["A2"].value == world["flexEquipment"][0]["code"]
    workbook.close()


def test_intake_template_endpoint_requires_auth_and_serves_the_declared_profile(monkeypatch, tmp_path):
    import server.gateway.app as gateway_module
    import server.state.store as state_store
    from tests.auth_provider import install_test_auth
    install_test_auth(monkeypatch, "tenant-intake-template")
    store = _MemStore(empty_world(), str(tmp_path / "world.json"))
    monkeypatch.setattr(gateway_module, "get_store", lambda: store)
    monkeypatch.setattr(state_store, "get_store", lambda: store)
    client = TestClient(gateway_module.create_app())

    unauthenticated = client.get("/api/import/template")
    assert unauthenticated.status_code == 401
    assert "AUTH_REQUIRED" in unauthenticated.text

    login = client.post("/api/auth/login", json={"username": "planner", "password": "test"})
    assert login.status_code == 200, login.text
    response = client.get("/api/import/template")
    assert response.status_code == 200, response.text
    profile = builtin_compatibility_profile()
    assert response.headers["x-aps-profile-id"] == profile["id"]
    assert response.headers["x-aps-profile-digest"] == profile["profileDigest"]
    assert response.headers["x-aps-template-id"] == f"intake-{profile['id']}.v1"
    assert "%E9%87%87%E9%9B%86%E6%A8%A1%E6%9D%BF" in response.headers["content-disposition"]
    assert response.content[:2] == b"PK"
    assert validate_intake_template(response.content, profile) == []

    # 条件请求：同一份模板不重复下载，换了配置摘要才重新拉取。
    cached = client.get("/api/import/template",
                        headers={"If-None-Match": response.headers["etag"]})
    assert cached.status_code == 304
    assert cached.content == b""
    assert cached.headers["x-aps-profile-id"] == profile["id"]
    assert client.get("/api/import/template",
                      headers={"If-None-Match": '"stale-digest"'}).status_code == 200

    unknown = client.get("/api/import/template", params={"profileId": "not-registered"})
    assert unknown.status_code == 404
    assert "not-registered" in unknown.json()["detail"]


def _deployment_profile(profile_id: str = "customer-b-planning-v1") -> dict:
    """一份改变了格式ID、表名和列名的部署配置，用于验证模板跟随配置目录。"""
    profile = copy.deepcopy(builtin_compatibility_profile())
    profile.pop("profileDigest")
    profile["id"] = profile_id
    profile["label"] = "客户B排产"
    for spec in profile["sheets"].values():
        spec["name"] = "B-" + spec["name"]
        spec["columns"] = {field: "B_" + header for field, header in spec["columns"].items()}
    return profile


def _write_profile(directory, profile: dict, filename: str = "deployment.json"):
    directory.mkdir(exist_ok=True)
    (directory / filename).write_text(json.dumps(profile, ensure_ascii=False), encoding="utf-8")


def test_template_and_contract_follow_the_configured_profile_directory(tmp_path, monkeypatch):
    profile = _deployment_profile()
    _write_profile(tmp_path, profile)
    monkeypatch.setenv("APS_WORKBOOK_PROFILE_DIR", str(tmp_path))

    template = build_intake_template()
    assert template["profileId"] == profile["id"]
    assert template["templateId"] == f"intake-{profile['id']}.v1"
    assert template["sheetNames"] == [spec["name"] for spec in profile["sheets"].values()]
    assert validate_intake_template(template["xlsxBytes"]) == []

    workbook = load_workbook(BytesIO(template["xlsxBytes"]))
    equipment = profile["sheets"]["equipment"]
    headers = [cell.value for cell in workbook[equipment["name"]][1]]
    assert headers == list(equipment["columns"].values())
    assert profile["id"] in str(workbook["数据采集说明"]["A2"].value)
    workbook.close()

    contract = template_contract()
    assert contract["profileId"] == profile["id"]
    assert [sheet["name"] for sheet in contract["sheets"]] == template["sheetNames"]
    assert contract["sheets"][0]["requiredColumns"] == profile["sheets"]["sourceNotes"]["requiredColumns"]


def test_template_default_profile_fails_closed_when_the_directory_is_ambiguous(tmp_path, monkeypatch):
    first = _deployment_profile("customer-b-planning-v1")
    first["compatibilityDefault"] = False
    _write_profile(tmp_path, first, "first.json")
    monkeypatch.setenv("APS_WORKBOOK_PROFILE_DIR", str(tmp_path))

    # 目录里只有一份配置：即使没有默认标记，也只有这一种格式可用。
    assert build_intake_template()["profileId"] == first["id"]

    second = _deployment_profile("customer-c-planning-v1")
    second["compatibilityDefault"] = False
    _write_profile(tmp_path, second, "second.json")
    with pytest.raises(ValueError, match="compatibilityDefault"):
        build_intake_template()

    # 唯一标记为默认的配置胜出，不再依赖目录顺序。
    second["compatibilityDefault"] = True
    _write_profile(tmp_path, second, "second.json")
    assert build_intake_template()["profileId"] == second["id"]


def test_builtin_profile_declares_required_columns_for_every_role():
    profile = builtin_compatibility_profile()
    for role, spec in profile["sheets"].items():
        assert spec["requiredColumns"], role
        assert set(spec["requiredColumns"]) <= set(spec["columns"]), role

def test_intake_template_contract_matches_the_authorized_workbook():
    """现场工作簿与模板必须逐表逐列同构，模板才代表真实导入格式。"""
    from tests.workbook_acceptance import source_for_test

    contract = template_contract()
    workbook = load_workbook(source_for_test(), read_only=True)
    try:
        assert workbook.sheetnames == [sheet["name"] for sheet in contract["sheets"]]
        for sheet in contract["sheets"]:
            physical = [cell.value for cell in next(workbook[sheet["name"]].iter_rows())]
            assert physical[:len(sheet["columns"])] == sheet["columns"], sheet["name"]
    finally:
        workbook.close()