"""HEL-177: 公司端转账往来页面（方案 A）结构与接口契约。"""

from __future__ import annotations

import re
import threading
import unittest
from functools import partial
from http.server import SimpleHTTPRequestHandler, ThreadingHTTPServer
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
WEB = ROOT / "web"

try:
    from playwright.sync_api import sync_playwright
except ImportError:  # pragma: no cover
    sync_playwright = None


class TransfersPageSourceContractTests(unittest.TestCase):
    def test_company_html_has_nav_overview_and_layers(self) -> None:
        html = (WEB / "company.html").read_text(encoding="utf-8")
        self.assertIn('data-view="transfers"', html)
        self.assertIn("转账往来", html)
        self.assertIn('id="workspaceTransfersCard"', html)
        self.assertIn("转账往来概览", html)
        self.assertIn('data-page="transfers"', html)
        self.assertIn('id="transfersOverviewLayer"', html)
        self.assertIn('id="transfersDetailLayer"', html)
        self.assertIn('id="transferEvidenceDrawer"', html)
        self.assertIn("期间净变动", html)
        self.assertNotIn("本公司往来合计", html)
        self.assertIn("design-system.css?v=6", html)
        self.assertIn("app.js?v=12", html)
        # 侧栏顺序：流水管理 → 转账往来 → 往来确认
        flows = html.index('data-view="flows"')
        transfers = html.index('data-view="transfers"')
        reconcile = html.index('data-view="reconcile"')
        self.assertLess(flows, transfers)
        self.assertLess(transfers, reconcile)

    def test_app_js_wires_real_apis_no_demo_totals(self) -> None:
        js = (WEB / "app.js").read_text(encoding="utf-8")
        self.assertIn('transfers: "转账往来"', js)
        self.assertIn("/api/company/intercompany/summary", js)
        self.assertIn("/api/company/intercompany/events", js)
        self.assertIn("/api/company/intercompany/export.csv", js)
        self.assertIn("/api/company/transfer-events/", js)
        self.assertIn("function loadTransfersSummary", js)
        self.assertIn("function openTransfersDetail", js)
        self.assertIn("function openTransferEvidence", js)
        self.assertIn("function initTransfers", js)
        self.assertIn("initTransfers()", js)
        self.assertIn("期间净变动", js)
        self.assertIn("has_opening", js)
        # 不得把「期末余额」写死为无期初时的标签
        self.assertNotRegex(js, r'netLabelForWindow[^{]+{[^}]*return "期末余额"')

    def test_design_system_scopes_info_to_transfers_module(self) -> None:
        css = (WEB / "design-system.css").read_text(encoding="utf-8")
        self.assertIn('a[data-view="transfers"].active', css)
        self.assertIn("var(--info-soft)", css)
        self.assertIn('[data-page="transfers"] .btn-primary', css)
        self.assertIn(".xfer-split", css)
        self.assertIn(".xfer-split-pane.confirmed", css)
        self.assertIn(".xfer-split-pane.pending", css)
        # 无新色硬编码
        self.assertNotRegex(css, r"\.xfer-split[^\{]*\{[^}]*#[0-9a-fA-F]{3,8}")


class TransfersDetailObservationContractTests(unittest.TestCase):
    def test_server_exposes_batch_fields_on_observations(self) -> None:
        server = (ROOT / "server.py").read_text(encoding="utf-8")
        self.assertIn("import_batch_id", server)
        self.assertIn("original_filename", server)
        self.assertIn("counterparty_account_masked", server)


def _chromium_available() -> bool:
    try:
        import ctypes.util

        return bool(ctypes.util.find_library("atk-1.0"))
    except Exception:
        return False


@unittest.skipUnless(sync_playwright, "playwright 未安装，跳过布局冒烟")
@unittest.skipUnless(_chromium_available(), "系统缺少 chromium 依赖库（如 libatk），跳过布局冒烟")
class TransfersPageLayoutSmokeTests(unittest.TestCase):
    """静态壳：360 / 820 / 1440 无横向溢出。"""

    @classmethod
    def setUpClass(cls) -> None:
        handler = partial(SimpleHTTPRequestHandler, directory=str(WEB))
        cls.httpd = ThreadingHTTPServer(("127.0.0.1", 0), handler)
        cls.port = cls.httpd.server_address[1]
        cls.thread = threading.Thread(target=cls.httpd.serve_forever, daemon=True)
        cls.thread.start()
        cls.base = f"http://127.0.0.1:{cls.port}"

    @classmethod
    def tearDownClass(cls) -> None:
        cls.httpd.shutdown()
        cls.httpd.server_close()

    def test_transfers_shell_no_horizontal_overflow(self) -> None:
        html = (WEB / "company.html").read_text(encoding="utf-8")
        with sync_playwright() as p:
            browser = p.chromium.launch()
            page = browser.new_page()
            for width in (360, 820, 1440):
                page.set_viewport_size({"width": width, "height": 900})
                page.set_content(
                    html.replace('src="app.js?v=12"', 'src=""'),
                    base_url=self.base,
                )
                page.evaluate(
                    """() => {
                      document.querySelectorAll('.app-view').forEach((el) => {
                        el.classList.toggle('is-active', el.dataset.page === 'transfers');
                      });
                      const data = document.getElementById('transfersData');
                      const loading = document.getElementById('transfersLoading');
                      if (loading) loading.hidden = true;
                      if (data) data.hidden = false;
                    }"""
                )
                overflow = page.evaluate(
                    "() => document.documentElement.scrollWidth > document.documentElement.clientWidth + 1"
                )
                self.assertFalse(overflow, f"{width}px 出现横向溢出")
            browser.close()


if __name__ == "__main__":
    unittest.main()