from __future__ import annotations

import importlib.util
import json
import subprocess
import sys
from pathlib import Path

import pytest

from deerflow.skills.parser import parse_skill_file
from deerflow.skills.storage.local_skill_storage import LocalSkillStorage
from deerflow.skills.types import SkillCategory
from deerflow.skills.validation import _validate_skill_frontmatter

BACKEND_ROOT = Path(__file__).resolve().parents[1]
SKILL_ROOT = BACKEND_ROOT / "skills" / "public" / "threads-page-generator"
SCRIPT_PATH = SKILL_ROOT / "scripts" / "render_threads_page.py"
FAST_SCRIPT_PATH = SKILL_ROOT / "scripts" / "fast_page.py"
LEAD_PROMPT_PATH = BACKEND_ROOT / "packages" / "harness" / "deerflow" / "agents" / "lead_agent" / "prompt.py"


def _load_renderer():
    spec = importlib.util.spec_from_file_location(
        "threads_page_renderer",
        SCRIPT_PATH,
    )
    assert spec and spec.loader
    module = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(module)
    return module


def test_skill_is_discoverable_and_valid() -> None:
    valid, error, _metadata = _validate_skill_frontmatter(SKILL_ROOT)
    assert valid, error
    skill = parse_skill_file(SKILL_ROOT / "SKILL.md", SkillCategory.PUBLIC)
    assert skill is not None
    assert skill.name == "threads-page-generator"
    assert "Threads" in skill.description

    discovered = LocalSkillStorage(host_path=str(SKILL_ROOT.parent.parent)).load_skills(enabled_only=True)
    discovered_by_name = {item.name: item for item in discovered}
    assert discovered_by_name["threads-page-generator"].category == SkillCategory.PUBLIC
    assert discovered_by_name["threads-page-generator"].enabled is True

    lead_prompt_source = LEAD_PROMPT_PATH.read_text(encoding="utf-8")
    assert "/mnt/skills/public/threads-page-generator/SKILL.md" in lead_prompt_source
    assert "专用 Threads 路由" in lead_prompt_source


def test_default_json_renders_editable_threads_html(tmp_path: Path) -> None:
    renderer = _load_renderer()
    data = json.loads((SKILL_ROOT / "assets" / "default-data.json").read_text(encoding="utf-8"))
    summary = renderer.validate_document(data)
    template = (SKILL_ROOT / "assets" / "threads-template.html").read_text(encoding="utf-8")
    runtime = (SKILL_ROOT / "assets" / "threads-runtime.js").read_text(encoding="utf-8")
    html = renderer.render_document(data, template, runtime)

    assert summary["modules"] == list(renderer.MODULES)
    assert summary["counts"]["threads"] >= 1
    assert renderer.DATA_MARKER not in html
    assert renderer.RUNTIME_MARKER not in html
    assert 'id="threadsPageData"' in html
    assert 'id="threadList"' in html
    assert 'id="composeOverlay"' in html
    assert 'id="openSettings"' in html
    assert 'id="moduleTabs"' in html
    assert 'id="applyJson"' in html
    assert "uploadJsonMedia" in html
    assert "installInlineMediaReplace" in html
    assert "dfInlineMediaInput" in html
    assert 'input.accept = "image/*,video/*"' in html
    assert 'button.title = "上传图片或视频并替换"' in html
    assert "active.expected" not in html
    assert "previous.posterUrl" not in html
    assert "decorateBuiltInVisuals" in html
    assert ".thread-media,.image-grid" in html
    assert 'data-thread-id="' in html
    assert "replaceBuiltInVisuals" not in html
    assert "readAsDataURL" in html
    assert '"brand": "Threads"' in html
    assert "<title>Threads · 串联想法</title>" in html
    assert '"threads-page-data-v1:" + pageFingerprint' in html
    assert "const readStorage = (key)" in html
    assert "window.localStorage.getItem" in html
    assert "const cachedData = localStorage.getItem" not in html
    assert '<img src="http' not in html
    assert '<video src="http' not in html

    data["site"]["pageTitle"] = "Threads · 智能体讨论"
    titled_html = renderer.render_document(data, template, runtime)
    assert "<title>Threads · 智能体讨论</title>" in titled_html
    assert "<title>Threads · 串联想法</title>" not in titled_html

    data["threads"]["items"][0]["text"] = "</script><script>alert('x')</script>"
    escaped_html = renderer.render_document(data, template, runtime)
    assert "</script><script>alert" not in escaped_html
    assert "<\\/script><script>alert" in escaped_html

    output = tmp_path / "threads-page.html"
    renderer._write_new(output, html)
    assert output.is_file()
    with pytest.raises(
        renderer.DataValidationError,
        match="Refusing to overwrite",
    ):
        renderer._write_new(output, html)


def test_validation_rejects_missing_module_duplicate_and_remote_media() -> None:
    renderer = _load_renderer()
    data = json.loads((SKILL_ROOT / "assets" / "default-data.json").read_text(encoding="utf-8"))
    data.pop("activity")
    data["threads"]["items"][1]["id"] = data["threads"]["items"][0]["id"]
    data["threads"]["items"][0]["media"]["type"] = "remote-image"

    with pytest.raises(renderer.DataValidationError) as exc_info:
        renderer.validate_document(data)

    message = str(exc_info.value)
    assert "Missing top-level module: activity" in message
    assert "must be unique" in message
    assert "media.type must be one of" in message


def test_remote_webpage_media_is_validated_and_supported_by_runtime() -> None:
    renderer = _load_renderer()
    data = json.loads((SKILL_ROOT / "assets" / "default-data.json").read_text(encoding="utf-8"))
    data["threads"]["items"][0]["media"] = {
        "type": "webpage",
        "pageUrl": "https://example.com/story",
        "title": "演示网页",
        "description": "串文中的网页卡片",
        "embed": True,
    }
    renderer.validate_document(data)
    runtime = (SKILL_ROOT / "assets" / "threads-runtime.js").read_text(encoding="utf-8")
    assert 'media.type === "webpage"' in runtime
    assert 'sandbox="allow-forms allow-popups allow-scripts"' in runtime


def test_high_level_fast_spec_renders_once_without_deep_paths(tmp_path: Path) -> None:
    spec_path = tmp_path / "threads-page-spec.json"
    spec_path.write_text(
        json.dumps(
            {
                "accountName": "茂达是🥚",
                "handle": "@maoda",
                "verified": True,
                "postText": "今天想和大家分享茂达品牌日常，也听听大家的看法。",
                "topic": "品牌日常",
                "replyTopics": ["品牌表达", "产品故事"],
                "displayReplyCount": 3,
                "totalReplyCount": 128,
                "replies": ["这个中文表达很自然，也很适合放在串文首页。"],
            },
            ensure_ascii=False,
        ),
        encoding="utf-8",
    )
    command = [
        sys.executable,
        str(FAST_SCRIPT_PATH),
        "--spec",
        str(spec_path),
        "--output-dir",
        str(tmp_path),
    ]

    completed = subprocess.run(
        command,
        check=False,
        capture_output=True,
        text=True,
        encoding="utf-8",
    )

    assert completed.returncode == 0, completed.stdout + completed.stderr
    result = json.loads(completed.stdout)
    assert result["status"] == "ok"
    assert result["action"] == "fast-threads-page"
    data_path = Path(result["data"])
    html_path = Path(result["html"])
    assert data_path.name == "threads-page-data.json"
    assert html_path.name == "threads-page.html"

    data = json.loads(data_path.read_text(encoding="utf-8"))
    assert data["site"]["currentUser"]["name"] == "茂达是🥚"
    assert len(data["threads"]["items"]) == 1
    thread = data["threads"]["items"][0]
    assert thread["author"]["handle"] == "@maoda"
    assert thread["author"]["verified"] is True
    assert thread["metrics"]["replies"] == 128
    assert len(thread["replies"]) == 3
    assert thread["replies"][0]["text"] == "这个中文表达很自然，也很适合放在串文首页。"
    assert thread["media"]["type"] == "autumn-grid"
    assert "今天想和大家分享茂达品牌日常" in html_path.read_text(encoding="utf-8")

    second = subprocess.run(
        command,
        check=False,
        capture_output=True,
        text=True,
        encoding="utf-8",
    )
    assert second.returncode == 0, second.stdout + second.stderr
    second_result = json.loads(second.stdout)
    assert Path(second_result["data"]).name == "threads-page-2-data.json"
    assert Path(second_result["html"]).name == "threads-page-2.html"


def test_high_level_fast_spec_rejects_english_only_post(tmp_path: Path) -> None:
    spec_path = tmp_path / "invalid-spec.json"
    spec_path.write_text(
        json.dumps(
            {
                "accountName": "茂达",
                "postText": "This post should remain Chinese.",
            },
            ensure_ascii=False,
        ),
        encoding="utf-8",
    )

    completed = subprocess.run(
        [
            sys.executable,
            str(FAST_SCRIPT_PATH),
            "--spec",
            str(spec_path),
            "--output-dir",
            str(tmp_path),
        ],
        check=False,
        capture_output=True,
        text=True,
        encoding="utf-8",
    )

    assert completed.returncode == 2
    result = json.loads(completed.stdout)
    assert result["status"] == "error"
    assert "must contain Simplified Chinese" in result["error"]


def test_threads_fast_workflow_forbids_generic_patch_paths() -> None:
    skill_text = (SKILL_ROOT / "SKILL.md").read_text(encoding="utf-8")
    prompt_text = LEAD_PROMPT_PATH.read_text(encoding="utf-8")

    assert '"accountName": "茂达是🥚"' in skill_text
    assert "不得写六模块 JSON、`$set` 或深层字段路径" in skill_text
    assert "Threads" in prompt_text
    assert "禁止生成 `$set`、六模块补丁、深层字段路径" in prompt_text