"""页面路由测试 — detail、trends、compare、graceful degradation。"""

from __future__ import annotations

from datetime import date
from unittest.mock import patch as upatch


# ═══════════════════════════════════════════════════════════════════════
# Detail 页 & 相似论文
# ═══════════════════════════════════════════════════════════════════════


class TestDetailPage:
    """论文详情页测试。"""

    def test_detail_page_renders(self, client, sample_papers_with_summary):
        """详情页正常渲染。"""
        resp = client.get("/paper/2401.20001")
        assert resp.status_code == 200
        assert "测试论文" in resp.text or "Test Paper" in resp.text

    def test_detail_page_not_found(self, client):
        """不存在的论文返回 404。"""
        resp = client.get("/paper/nonexistent.99999")
        assert resp.status_code == 404


# ═══════════════════════════════════════════════════════════════════════
# Trends Dashboard
# ═══════════════════════════════════════════════════════════════════════


class TestTrendsDashboard:
    """趋势看板测试。"""

    def test_trends_api_daily_counts(self, client, sample_papers_with_summary):
        """每日论文数量数据正确。"""
        # 使用测试数据的日期范围
        with upatch("app.services.trends.date") as mock_date:
            mock_date.today.return_value = date(2024, 1, 20)
            mock_date.side_effect = lambda *a, **kw: date(*a, **kw)

            resp = client.get("/api/stats/trends")
            data = resp.json()
            assert len(data["daily_counts"]) == 5
            for item in data["daily_counts"]:
                assert "date" in item
                assert "count" in item
                assert item["count"] == 1

    def test_trends_api_top_tags(self, client, sample_papers_with_summary):
        """热门标签数据正确。"""
        resp = client.get("/api/stats/trends")
        data = resp.json()
        tags = {t["tag"]: t["count"] for t in data["top_tags"]}
        assert "NLP" in tags
        assert tags["NLP"] == 5  # 所有论文都有 NLP

    def test_trends_api_summary_completion(self, client, sample_papers_with_summary):
        """总结完成率数据正确。"""
        resp = client.get("/api/stats/trends")
        data = resp.json()
        statuses = {s["status"]: s["count"] for s in data["summary_completion"]}
        assert "done" in statuses
        assert statuses["done"] == 4  # 4 篇已完成

    def test_trends_empty_db(self, client):
        """无数据时不崩溃。"""
        resp = client.get("/api/stats/trends")
        assert resp.status_code == 200
        data = resp.json()
        assert data["daily_counts"] == []
        assert data["top_tags"] == []


# ═══════════════════════════════════════════════════════════════════════
# Compare Page
# ═══════════════════════════════════════════════════════════════════════


class TestComparePage:
    """论文对比页测试。"""

    def test_compare_page_with_ids(self, client, sample_papers_with_summary):
        """对比多篇论文正常渲染。"""
        resp = client.get("/compare?ids=2401.20001,2401.20002")
        assert resp.status_code == 200
        assert "2401.20001" in resp.text
        assert "2401.20002" in resp.text
        # 应包含对比字段
        assert "一句话摘要" in resp.text
        assert "研究问题" in resp.text

    def test_compare_page_shows_no_summary_placeholder(
        self, client, sample_papers_with_summary
    ):
        """无总结的论文显示占位文本。"""
        # 2401.20005 没有 summary（status=pending）
        resp = client.get("/compare?ids=2401.20005")
        assert resp.status_code == 200
        assert "暂无总结" in resp.text