"""Tests for scripts.twitter_threads.render_markdown and Result contract."""
from __future__ import annotations

from pathlib import Path

import pytest

from scripts.twitter_threads.error_types import ErrorInfo, make_error, PostMetrics, PostData, Result, ThreadData
from scripts.twitter_threads.render_markdown import render_markdown


def _post(post_id: str, text: str, reply_to_id: str | None = None, quote_of_id: str | None = None, view_count: int = 0, timestamp: str = "2024-02-01T00:00:00Z", handle: str = "NOTimothyLottes", author: str = "Tim") -> PostData:
 metrics = PostMetrics(reply_count=0, repost_count=0, like_count=0, view_count=view_count)
 return PostData(post_id=post_id, author=author, handle=handle, text=text, timestamp=timestamp, media_urls=(), reply_to_id=reply_to_id, quote_of_id=quote_of_id, metrics=metrics)


def test_result_ok_and_err() -> None:
 r = Result.ok("x")
 assert r.is_ok is True
 assert r.data == "x"
 e = make_error("K", "s", "d")
 r2 = Result.err(e)
 assert r2.is_ok is False
 assert r2.error is e


def test_render_single_post(tmp_path: Path) -> None:
 root = _post("123", "Hello world", view_count=5)
 thread = ThreadData(root_post_id="123", posts=(root,), source_url="https://x.com/x/x/123")
 out = tmp_path / "thread.md"
 result = render_markdown(thread, {}, out)
 assert result.is_ok
 assert result.data == out
 assert out.exists()
 text = out.read_text(encoding="utf-8")
 assert text.startswith("---")
 assert "@NOTimothyLottes" in text
 assert "post_id:" in text
 assert "post_count: 1" in text
 assert "view_count: 5" in text
 assert "Hello world" in text


def test_render_thread(tmp_path: Path) -> None:
 p1 = _post("1", "first post")
 p2 = _post("2", "second post", reply_to_id="1")
 p3 = _post("3", "third post", reply_to_id="2")
 thread = ThreadData(root_post_id="1", posts=(p1, p2, p3), source_url="https://x.com/x/x/1")
 out = tmp_path / "thread.md"
 result = render_markdown(thread, {}, out)
 assert result.is_ok
 text = out.read_text(encoding="utf-8")
 i1 = text.index("## Post 1")
 i2 = text.index("## Post 2")
 i3 = text.index("## Post 3")
 assert i1 < i2 < i3
 assert "reply to Post 1" in text
 assert "reply to Post 2" in text


def test_render_quote_tweet(tmp_path: Path) -> None:
 root = _post("100", "this is a quote", quote_of_id="999")
 thread = ThreadData(root_post_id="100", posts=(root,), source_url="https://x.com/x/x/100")
 out = tmp_path / "thread.md"
 result = render_markdown(thread, {}, out)
 assert result.is_ok
 text = out.read_text(encoding="utf-8")
 quote_lines = [line for line in text.splitlines() if line.startswith("> ")]
 assert any("Quoting" in line and "999" in line for line in quote_lines)


def test_render_media_links(tmp_path: Path) -> None:
 root = _post("123", "media post")
 thread = ThreadData(root_post_id="123", posts=(root,), source_url="https://x.com/x/x/123")
 out = tmp_path / "thread.md"
 media_names = {"123": ["123_img1.jpg", "123_img2.jpg", "123_vid1.mp4"]}
 result = render_markdown(thread, media_names, out)
 assert result.is_ok
 text = out.read_text(encoding="utf-8")
 assert "[Media 1](./media/123_img1.jpg)" in text
 assert "[Media 2](./media/123_img2.jpg)" in text
 assert "[Media 3](./media/123_vid1.mp4)" in text


def test_render_view_count_null(tmp_path: Path) -> None:
 root = _post("123", "hello", view_count=None)
 thread = ThreadData(root_post_id="123", posts=(root,), source_url="https://x.com/x/x/123")
 out = tmp_path / "thread.md"
 result = render_markdown(thread, {}, out)
 assert result.is_ok
 text = out.read_text(encoding="utf-8")
 assert "view_count: null" in text


def test_render_title_truncated(tmp_path: Path) -> None:
 text100 = "A" * 100
 root = _post("123", text100)
 thread = ThreadData(root_post_id="123", posts=(root,), source_url="https://x.com/x/x/123")
 out = tmp_path / "thread.md"
 result = render_markdown(thread, {}, out)
 assert result.is_ok
 text = out.read_text(encoding="utf-8")
 h1_lines = [line for line in text.splitlines() if line.startswith("# @")]
 assert h1_lines, "expected an H1 line starting with '# @'"
 h1 = h1_lines[0]
 assert "A" * 80 in h1
 assert "A" * 81 not in h1