from browser import document
from message.simple_messages import DataChgClickMessage, ClickMessage, NoReset
from message.message import Message
from model.example import Example, ComponentLexeme
from model.sense import Sense



def _get_example_idx(example, model):
    for sense in model.entry.senses:
        for eidx, e in enumerate(sense.examples):
            if e == example:
                return (sense, eidx)


class ExampleMoveUp(DataChgClickMessage):
    def update_model(self, model):
        example = self.get_arg(0, Example)
        sense, idx = _get_example_idx(example, model)
        
        assert(idx >= 0)
        if idx == 0:
            return
        
        sense.examples[idx], sense.examples[idx - 1] = sense.examples[idx - 1], sense.examples[idx]


class ExampleMoveDown(DataChgClickMessage):
    def update_model(self, model):
        example = self.get_arg(0, Example)
        sense, idx = _get_example_idx(example, model)
        
        assert(idx >= 0)
        if idx == len(sense.examples) - 1:
            return
        
        sense.examples[idx], sense.examples[idx + 1] = sense.examples[idx + 1], sense.examples[idx]
        
        
class ExampleBin(DataChgClickMessage):
    def update_model(self, model):
        example = self.get_arg(0, Example)
        sense, idx = _get_example_idx(example, model)
        
        assert(idx >= 0)
        sense.examples.splice(idx, 1)


class EditExampleText(Message):
    def update_model(self, model):
        example = self.get_arg(0, Example)
        sense = self.get_arg(1, Sense)
        
        example.overwrite_with_copy()
        example.edited = True
        
        # if this was a newly created example, now we can add it to the sense
        # easier to add here than to add before editing and checking if the user
        # canceled the operation
        if example.newly_created:
            example.newly_created = False
            sense.examples.append(example)
        
        idx = 0
        for txt in document.getElementsByClassName("example-component-text"):
            example.components[idx].text = txt.value
            idx += 1

class ExampleRoleChange(NoReset):
    def update_model(self, model):
        example = self.get_arg(0, Example)
        component_num = self.get_arg(1, int)
        component_new_role = self.get_arg(2, str)
        
        if component_new_role == "none":
            component_new_role = None
        
        example.copy().components[component_num].role = component_new_role


class ExampleComponentSpace(NoReset):
    def update_model(self, model):
        example = self.get_arg(0, Example)
        component_num = self.get_arg(1, int)
        
        component = example.copy().components[component_num]
        component.no_space = not component.no_space
        
        
class ExampleComponentAdd(NoReset):
    def update_model(self, model):
        example = self.get_arg(0, Example)
        component_num = self.get_arg(1, int)
        
        new_component = ComponentLexeme()
        example.copy().components.insert(component_num + 1, new_component)


class ExampleComponentRemove(NoReset):
    def update_model(self, model):
        example = self.get_arg(0, Example)
        component_num = self.get_arg(1, int)
        
        example.copy().components.splice(component_num, 1)


class ToggleExamples(Message):
    def update_model(self, model):
        model.examples_shown = not model.examples_shown
        
        
class ToggleClusters(Message):
    def update_model(self, model):
        model.clusters_shown = not model.clusters_shown