# -*- coding: utf-8 -*-
"""富文本文件迁移路径修复测试：验证临时文件迁移与URL往返转换。

在临时目录中构建真实的 uploads/temp 结构，确认
save_file 迁移逻辑与路径拼接正确（含 Windows 分隔符场景）。
"""
import sys

import pytest

sys.path.insert(0, 'src')

import utils.rich_text as rt


@pytest.fixture
def fake_uploads(monkeypatch, tmp_path):
    """将 rich_text 的路径常量指向 tmp 下的临时目录。"""
    up = tmp_path / 'uploads'
    temp = up / 'temp'
    temp.mkdir(parents=True)
    monkeypatch.setattr(rt, 'FASTAPI_UPLOAD_DIR', str(up))
    monkeypatch.setattr(rt, 'FASTAPI_TEMP_PATH', str(temp))
    monkeypatch.setattr(rt, 'FASTAPI_FILE_URL', 'http://img.test')
    return up, temp


def test_already_in_formal_dir_returns_relative_url(fake_uploads):
    up, temp = fake_uploads
    target = up / 'article' / '20240801' / 'a.png'
    target.parent.mkdir(parents=True)
    target.write_bytes(b'x')

    result = rt.save_file('http://img.test/article/20240801/a.png', 'article')
    assert result == '/article/20240801/a.png'
    assert target.exists()  # 不迁移、不移动


def test_temp_file_migrates_to_formal_dir(fake_uploads):
    import time
    up, temp = fake_uploads
    src = temp / '20240801' / 'b.png'
    src.parent.mkdir(parents=True)
    src.write_bytes(b'data')

    result = rt.save_file('/temp/20240801/b.png', 'article')
    today = time.strftime('%Y%m%d')
    # 迁移后返回正式目录相对URL（目标日期目录为当前日期，仅迁移文件名）
    assert result == f'/article/{today}/b.png'
    assert not src.exists()  # 原临时文件已移动
    dest = up / 'article' / today / 'b.png'
    assert dest.read_bytes() == b'data'


def test_temp_file_migrates_from_absolute_url(fake_uploads):
    import time
    up, temp = fake_uploads
    src = temp / '20240802' / 'c.png'
    src.parent.mkdir(parents=True)
    src.write_bytes(b'abc')

    result = rt.save_file('http://img.test/temp/20240802/c.png', 'article')
    today = time.strftime('%Y%m%d')
    assert result == f'/article/{today}/c.png'
    assert (up / 'article' / today / 'c.png').read_bytes() == b'abc'


def test_remote_url_not_supported(fake_uploads):
    assert rt.save_file('https://other.host/x.png', 'article') == ''


def test_empty_url_returns_empty(fake_uploads):
    assert rt.save_file('', 'article') == ''
    assert rt.save_file(None, 'article') == ''


def test_disk_to_url_roundtrip(fake_uploads):
    up, temp = fake_uploads
    target = up / 'article' / '20240801' / 'd.png'
    target.parent.mkdir(parents=True)
    target.write_bytes(b'z')
    # 正式目录文件：磁盘路径 -> 相对URL -> 磁盘路径 往返一致
    disk = rt._url_to_disk_path('/article/20240801/d.png')
    assert disk == str(target)
    assert rt._disk_to_url_path(disk) == '/article/20240801/d.png'