"""
tests/test_node.py
CTNode 단위 테스트
"""

import pytest
from ctstruct import CTNode, NodeType


class TestCTNodeBasic:
    def test_create_node(self):
        n = CTNode(NodeType.PARAGRAPH, "hello")
        assert n.node_type == NodeType.PARAGRAPH
        assert n.content == "hello"
        assert n.is_leaf
        assert n.is_root

    def test_append_child(self):
        parent = CTNode(NodeType.SECTION)
        child = CTNode(NodeType.PARAGRAPH, "child")
        parent.append(child)
        assert len(parent) == 1
        assert child.parent is parent
        assert not parent.is_leaf

    def test_depth(self):
        root = CTNode(NodeType.ROOT)
        sec = CTNode(NodeType.SECTION)
        para = CTNode(NodeType.PARAGRAPH, "text")
        root.append(sec)
        sec.append(para)
        assert root.depth == 0
        assert sec.depth == 1
        assert para.depth == 2

    def test_detach(self):
        parent = CTNode(NodeType.SECTION)
        child = CTNode(NodeType.PARAGRAPH, "bye")
        parent.append(child)
        child.detach()
        assert len(parent) == 0
        assert child.parent is None

    def test_walk_pre(self):
        root = CTNode(NodeType.ROOT)
        a = CTNode(NodeType.SECTION)
        b = CTNode(NodeType.PARAGRAPH, "b")
        root.append(a)
        a.append(b)
        nodes = list(root.walk("pre"))
        assert nodes[0] is root
        assert nodes[1] is a
        assert nodes[2] is b

    def test_walk_bfs(self):
        root = CTNode(NodeType.ROOT)
        a = CTNode(NodeType.SECTION)
        b = CTNode(NodeType.PARAGRAPH, "b")
        c = CTNode(NodeType.PARAGRAPH, "c")
        root.append(a)
        root.append(c)
        a.append(b)
        bfs = list(root.walk("bfs"))
        assert bfs[0] is root
        # level 1: a, c
        assert bfs[1] is a
        assert bfs[2] is c
        # level 2: b
        assert bfs[3] is b

    def test_find(self):
        root = CTNode(NodeType.ROOT)
        root.append(CTNode(NodeType.HEADING, "h1", {"level": 1}))
        root.append(CTNode(NodeType.PARAGRAPH, "para"))
        root.append(CTNode(NodeType.HEADING, "h2", {"level": 2}))
        headings = root.find(NodeType.HEADING)
        assert len(headings) == 2

    def test_text_content(self):
        root = CTNode(NodeType.ROOT)
        root.append(CTNode(NodeType.PARAGRAPH, "hello "))
        root.append(CTNode(NodeType.PARAGRAPH, "world"))
        assert root.text_content() == "hello world"

    def test_siblings(self):
        parent = CTNode(NodeType.SECTION)
        a = CTNode(NodeType.PARAGRAPH, "a")
        b = CTNode(NodeType.PARAGRAPH, "b")
        c = CTNode(NodeType.PARAGRAPH, "c")
        parent.append(a)
        parent.append(b)
        parent.append(c)
        assert b.siblings == [a, c]