# -*- coding: utf-8 -*-
# Copyright (c) 2025 relakkes@gmail.com
#
# This file is part of MediaCrawler project.
# Repository: https://github.com/NanmiCoder/MediaCrawler/blob/main/tests/test_monitor_comments.py
# GitHub: https://github.com/NanmiCoder
# Licensed under NON-COMMERCIAL LEARNING LICENSE 1.1
#
# 声明：本代码仅供学习和研究目的使用。使用者应遵守以下原则：
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"""Comment note-association, grouping, and the export endpoint."""

import csv
import io

import httpx
import pytest
import pytest_asyncio

from api.main import app
from api.monitor import db as monitor_db
from api.monitor.models import (
    MODE_CREATOR,
    MonitorComment,
    MonitorNote,
    MonitorTask,
)

TASK_NAME = "评论归属测试"

# 作品的发布时间。和 first_seen_at（我们第一次看到它）刻意取不同的值 —— 两者混成
# 一个概念是最容易犯的错。
PUBLISHED_A = 1_699_000_000_000
PUBLISHED_B = 1_699_100_000_000


async def _seed():
    """Two works; three comments on the first, one on the second."""
    async with monitor_db.get_session() as session:
        task = MonitorTask(
            name=TASK_NAME, platform="xhs", mode=MODE_CREATOR, enabled=True,
            interval_minutes=60, max_notes_count=20, enable_comments=True,
            max_comments_count=50, run_timeout_seconds=3600,
            notify_enabled=False, created_at=0, updated_at=0,
        )
        session.add(task)
        await session.flush()

        # 两个作品**属于不同的博主** —— 评论流最外层按创作者分组，同一个人就没得测了。
        for note_id, title, creator_hash, creator_name, published_at in (
            ("note-a", "作品甲", "hash-a", "博主甲", PUBLISHED_A),
            ("note-b", "作品乙", "hash-b", "博主乙", PUBLISHED_B),
        ):
            session.add(
                MonitorNote(
                    task_id=task.id, note_id=note_id, title=title,
                    note_url=f"https://www.xiaohongshu.com/explore/{note_id}",
                    cover=f"https://img/{note_id}.jpg", creator_hash=creator_hash,
                    creator_name=creator_name,
                    source_kind="video", published_at=published_at,
                    first_seen_run_id=1, first_seen_at=1_700_000_000_000,
                    last_seen_run_id=1, last_seen_at=1_700_000_000_000,
                )
            )

        # note-a has three comments, note-b has one.
        plan = [
            ("c1", "note-a", 1_700_000_001_000),
            ("c2", "note-a", 1_700_000_002_000),
            ("c3", "note-a", 1_700_000_003_000),
            ("c4", "note-b", 1_700_000_004_000),
        ]
        for comment_id, note_id, seen_at in plan:
            session.add(
                MonitorComment(
                    task_id=task.id, note_id=note_id, comment_id=comment_id,
                    content=f"内容-{comment_id}", nickname="u***r", creator_hash="h",
                    create_time=seen_at, like_count=1, sub_comment_count=0,
                    parent_comment_id="", first_seen_run_id=1, first_seen_at=seen_at,
                )
            )
        return task.id


@pytest_asyncio.fixture
async def client(tmp_path):
    monitor_db.set_sqlite_path(tmp_path / "monitor.db")
    await monitor_db.init_db()
    await _seed()

    transport = httpx.ASGITransport(app=app)
    async with httpx.AsyncClient(transport=transport, base_url="http://test") as http_client:
        yield http_client

    await monitor_db.dispose_engine()


class TestCommentsCarryTheirNote:
    @pytest.mark.asyncio
    async def test_each_comment_names_its_work(self, client):
        """A bare note_id is unreadable -- the title is the whole point."""
        response = await client.get("/api/monitor/comments")
        assert response.status_code == 200

        comments = response.json()["comments"]
        assert len(comments) == 4

        by_id = {c["comment_id"]: c for c in comments}
        assert by_id["c1"]["note_title"] == "作品甲"
        assert by_id["c1"]["note_url"].endswith("note-a")
        assert by_id["c1"]["note_cover"].endswith("note-a.jpg")
        assert by_id["c4"]["note_title"] == "作品乙"

    @pytest.mark.asyncio
    async def test_note_id_filters_the_stream(self, client):
        response = await client.get("/api/monitor/comments", params={"note_id": "note-a"})
        comments = response.json()["comments"]
        assert {c["comment_id"] for c in comments} == {"c1", "c2", "c3"}


class TestGroupByNote:
    @pytest.mark.asyncio
    async def test_groups_bucket_by_work(self, client):
        response = await client.get("/api/monitor/comments", params={"group_by": "note"})
        body = response.json()

        assert "groups" in body
        assert body["total"] == 4

        groups = {g["note_id"]: g for g in body["groups"]}
        assert set(groups) == {"note-a", "note-b"}
        assert len(groups["note-a"]["comments"]) == 3
        assert len(groups["note-b"]["comments"]) == 1
        assert groups["note-a"]["note_title"] == "作品甲"

    @pytest.mark.asyncio
    async def test_newest_group_comes_first(self, client):
        """The UI expands the first group by default, so it must be the newest."""
        response = await client.get("/api/monitor/comments", params={"group_by": "note"})
        groups = response.json()["groups"]
        # note-b's only comment is the most recent overall.
        assert groups[0]["note_id"] == "note-b"

    @pytest.mark.asyncio
    async def test_each_bucket_carries_its_creator(self, client):
        """桶上必须带作品的创作者 —— 评论流最外层就是按它分组的。

        少了这两个字段，前端拿到的 creator_hash / creator_name 都是 undefined，
        于是所有博主塌成同一个分组、标签回退成「未知博主」：一个人都分不出来。
        """
        groups = {
            group["note_id"]: group
            for group in (
                await client.get("/api/monitor/comments", params={"group_by": "note"})
            ).json()["groups"]
        }

        assert groups["note-a"]["creator_hash"] == "hash-a"
        assert groups["note-a"]["creator_name"] == "博主甲"
        assert groups["note-b"]["creator_hash"] == "hash-b"
        assert groups["note-b"]["creator_name"] == "博主乙"
        # 两个作品的创作者必须真的不同，否则界面上照样分不出来。
        assert groups["note-a"]["creator_hash"] != groups["note-b"]["creator_hash"]

    @pytest.mark.asyncio
    async def test_each_bucket_carries_the_publish_date(self, client):
        """作品那一层要带发布日期：同名作品不少，日期能帮着认。

        注意它和 first_seen_at 是两个概念 —— 前者是作者发布的那天，后者是我们第一次
        看到它的那天。把老作品加进监控时两者能差好几个月。
        """
        groups = {
            group["note_id"]: group
            for group in (
                await client.get("/api/monitor/comments", params={"group_by": "note"})
            ).json()["groups"]
        }

        assert groups["note-a"]["published_at"] == PUBLISHED_A
        assert groups["note-b"]["published_at"] == PUBLISHED_B
        assert groups["note-a"]["published_at"] != groups["note-b"]["published_at"]

    @pytest.mark.asyncio
    async def test_the_notes_endpoint_exposes_the_publish_date(self, client):
        """作品列表也要带上它 —— 作品栏就是靠这个显示「发布日期」列的。"""
        notes = {
            note["note_id"]: note
            for note in (await client.get("/api/monitor/notes")).json()["notes"]
        }

        assert notes["note-a"]["published_at"] == PUBLISHED_A
        assert notes["note-b"]["published_at"] == PUBLISHED_B
        # 和「首次发现」不是同一个值 —— 两者混了的话这个断言会抓到。
        assert notes["note-a"]["first_seen_at"] != notes["note-a"]["published_at"]

    @pytest.mark.asyncio
    async def test_flat_shape_is_unchanged_without_the_flag(self, client):
        body = (await client.get("/api/monitor/comments")).json()
        assert "comments" in body and "groups" not in body


class TestCommentNoteFilterOptions:
    @pytest.mark.asyncio
    async def test_options_carry_counts_and_titles(self, client):
        response = await client.get("/api/monitor/comment-notes")
        assert response.status_code == 200

        notes = {n["note_id"]: n for n in response.json()["notes"]}
        assert notes["note-a"]["comment_count"] == 3
        assert notes["note-b"]["comment_count"] == 1
        assert notes["note-a"]["note_title"] == "作品甲"

    @pytest.mark.asyncio
    async def test_scoped_to_a_task(self, client):
        tasks = (await client.get("/api/monitor/tasks")).json()["tasks"]
        task_id = tasks[0]["id"]

        scoped = await client.get("/api/monitor/comment-notes", params={"task_id": task_id})
        assert len(scoped.json()["notes"]) == 2

        # A task with no comments yields an empty list, not an error.
        other = await client.get("/api/monitor/comment-notes", params={"task_id": 9999})
        assert other.json()["notes"] == []


class TestExport:
    @pytest.mark.asyncio
    async def test_csv_has_a_bom_so_excel_does_not_mangle_chinese(self, client):
        response = await client.get("/api/monitor/export", params={"kind": "comments"})
        assert response.status_code == 200
        assert response.content.startswith(b"\xef\xbb\xbf")
        assert "attachment" in response.headers["content-disposition"]

        text = response.content.decode("utf-8-sig")
        rows = list(csv.DictReader(io.StringIO(text)))
        assert len(rows) == 4
        assert rows[0]["所属作品"] in ("作品甲", "作品乙")

    @pytest.mark.asyncio
    async def test_notes_export(self, client):
        response = await client.get(
            "/api/monitor/export", params={"kind": "notes", "format": "csv"}
        )
        rows = list(csv.DictReader(io.StringIO(response.content.decode("utf-8-sig"))))
        assert {r["作品ID"] for r in rows} == {"note-a", "note-b"}

    @pytest.mark.asyncio
    async def test_xlsx_is_a_readable_workbook(self, client):
        from openpyxl import load_workbook

        response = await client.get(
            "/api/monitor/export", params={"kind": "comments", "format": "xlsx"}
        )
        assert response.status_code == 200

        workbook = load_workbook(io.BytesIO(response.content))
        sheet = workbook.active
        assert sheet.max_row == 5  # header + four comments
        assert sheet.cell(row=1, column=1).value == "所属作品"

    @pytest.mark.asyncio
    async def test_report_export(self, client):
        response = await client.get(
            "/api/monitor/export",
            params={"kind": "report", "days": 3},
        )
        rows = list(csv.DictReader(io.StringIO(response.content.decode("utf-8-sig"))))
        assert len(rows) == 3
        assert "日期" in rows[0]

    @pytest.mark.asyncio
    async def test_unknown_kind_and_format_are_rejected(self, client):
        assert (
            await client.get("/api/monitor/export", params={"kind": "nope"})
        ).status_code == 400
        assert (
            await client.get("/api/monitor/export", params={"kind": "notes", "format": "pdf"})
        ).status_code == 400

    @pytest.mark.asyncio
    async def test_empty_selection_is_a_404_not_an_empty_file(self, client):
        """An empty download looks like a bug; say so instead."""
        response = await client.get(
            "/api/monitor/export", params={"kind": "comments", "note_id": "no-such-note"}
        )
        assert response.status_code == 404