"""
Comprehensive binding tests for all bindable FastHTML components.

This test suite covers:
- Input (text) - already tested
- Checkbox - already tested
- Textarea
- Select (single)
- Select (multiple)
- Range (slider)
- Radio buttons
- Button
- Input with Datalist (combobox)
"""

from dataclasses import dataclass

from fasthtml.components import (
  Label, Textarea
)

from myfasthtml.controls.helpers import mk
from myfasthtml.core.bindings import Binding


@dataclass
class Data:
  value: str = "hello world"


@dataclass
class NumericData:
  value: int = 50


@dataclass
class BoolData:
  value: bool = True


@dataclass
class ListData:
  value: list = None
  
  def __post_init__(self):
    if self.value is None:
      self.value = []


class TestBindingTextarea:
  """Tests for binding Textarea components."""
  
  def test_i_can_bind_textarea(self, user, rt):
    """
    Textarea should bind bidirectionally with data.
    Value changes should update the label.
    """
    
    @rt("/")
    def index():
      data = Data("Initial text")
      textarea_elt = Textarea(name="textarea_name")
      label_elt = Label()
      mk.manage_binding(textarea_elt, Binding(data))
      mk.manage_binding(label_elt, Binding(data))
      return textarea_elt, label_elt
    
    user.open("/")
    user.should_see("Initial text")
    
    testable_textarea = user.find_element("textarea")
    testable_textarea.send("New multiline\ntext content")
    user.should_see("New multiline\ntext content")
  
  def test_i_can_bind_textarea_with_empty_initial_value(self, user, rt):
    """
    Textarea with empty initial value should update correctly.
    """
    
    @rt("/")
    def index():
      data = Data("")
      textarea_elt = Textarea(name="textarea_name")
      label_elt = Label()
      mk.manage_binding(textarea_elt, Binding(data))
      mk.manage_binding(label_elt, Binding(data))
      return textarea_elt, label_elt
    
    user.open("/")
    user.should_see("")  # Empty initially
    
    testable_textarea = user.find_element("textarea")
    testable_textarea.send("First content")
    user.should_see("First content")
  
  def test_textarea_append_works_with_binding(self, user, rt):
    """
    Appending text to textarea should trigger binding update.
    """
    
    @rt("/")
    def index():
      data = Data("Start")
      textarea_elt = Textarea(name="textarea_name")
      label_elt = Label()
      mk.manage_binding(textarea_elt, Binding(data))
      mk.manage_binding(label_elt, Binding(data))
      return textarea_elt, label_elt
    
    user.open("/")
    user.should_see("Start")
    
    testable_textarea = user.find_element("textarea")
    testable_textarea.append(" + More")
    user.should_see("Start + More")
  
  def test_textarea_clear_works_with_binding(self, user, rt):
    """
    Clearing textarea should update binding to empty string.
    """
    
    @rt("/")
    def index():
      data = Data("Content to clear")
      textarea_elt = Textarea(name="textarea_name")
      label_elt = Label()
      mk.manage_binding(textarea_elt, Binding(data))
      mk.manage_binding(label_elt, Binding(data))
      return textarea_elt, label_elt
    
    user.open("/")
    user.should_see("Content to clear")
    
    testable_textarea = user.find_element("textarea")
    testable_textarea.clear()
    user.should_not_see("Content to clear")