# vim:fileencoding=utf-8
# License: GPL v3 Copyright: 2015, Kovid Goyal <kovid at kovidgoyal.net>
from __python__ import hash_literals

simple_vendor_prefixes = {
    'animation': v"['webkit', 'moz', 'o']",
    'animation-name': v"['webkit', 'moz', 'o']",
    'animation-duration': v"['webkit', 'moz', 'o']",
    'animation-timing-function': v"['webkit', 'moz', 'o']",
    'animation-delay': v"['webkit', 'moz', 'o']",
    'animation-iteration-count': v"['webkit', 'moz', 'o']",
    'animation-direction': v"['webkit', 'moz', 'o']",
    'animation-fill-mode': v"['webkit', 'moz', 'o']",
    'animation-play-state': v"['webkit', 'moz', 'o']",
    'hyphens': v"['webkit', 'moz', 'ms']",
    'transform': v"['webkit', 'ms', 'moz', 'o']",
    'transform-origin': v"['webkit', 'ms', 'moz', 'o']",
    'transition': v"['webkit', 'moz', 'o']",
    'filter': v"['webkit']",
    'user-select': v"['webkit', 'moz', 'ms']",
    'break-before': v"['webkit-column']",
    'break-after': v"['webkit-column']",
    'break-inside': v"['webkit-column']",
    'column-gap': v"['webkit', 'moz']",
    'column-width': v"['webkit', 'moz']",
    'column-rule': v"['webkit', 'moz']",
    'column-fill': v"['moz']",
}

def set_css(elem, **kw):
    if jstype(elem) is 'string':
        elem = document.querySelector(elem)
    s = elem.style
    if s:
        for prop in kw:
            name, val = str.replace(str.rstrip(prop, '_'), '_', '-'), kw[prop]
            if val is None or val is undefined:
                s.removeProperty(name)
            else:
                s.setProperty(name, val)
            prefixes = simple_vendor_prefixes[name]
            if prefixes:
                for prefix in prefixes:
                    if val is None or val is undefined:
                        s.removeProperty('-' + prefix + '-' + name)
                    else:
                        s.setProperty('-' + prefix + '-' + name, val)
    return elem

def build_rule(selector, **kw):
    ans = v'[selector + " { "]'
    for prop in kw:
        name, val = str.replace(str.rstrip(prop, '_'), '_', '-'), kw[prop]
        ans.push(name + ':' + val + ';')
        prefixes = simple_vendor_prefixes[name]
        if prefixes:
            for prefix in prefixes:
                ans.push('-' + prefix + '-' + name + ':' + val + ';')
    ans.push('}')
    return ans.join('\n') + '\n'


def clear():
    for v'var i = 0; i < arguments.length; i++':
        node = arguments[i]
        while node.firstChild:
            node.removeChild(node.firstChild)


def remove_all_attributes():
    for v'var i = 0; i < arguments.length; i++':
        node = arguments[i]
        while node.attributes.length > 0:
            node.removeAttributeNode(node.attributes[0])


def create_keyframes(animation_name, *frames):
    ans = v'[]'
    for prefix in '-webkit-', '-moz-', '-o-', '':
        ans.push('@' + prefix + 'keyframes ' + animation_name + ' {')
        for frame in frames:
            ans.push(frame)
        ans.push('}')
    return ans.join('\n') + '\n'

def change_icon_image(icon_element, new_name):
    if new_name:
        icon_element.firstChild.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', '#icon-' + new_name)
    else:
        icon_element.firstChild.removeAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href')

def svgicon(name, height, width, tooltip):
    ans = document.createElementNS('http://www.w3.org/2000/svg', 'svg')
    ans.setAttribute('style', 'fill: currentColor; height: {}; width: {}; vertical-align: text-top'.format(height ? '2ex', width ? '2ex'))
    u = document.createElementNS('http://www.w3.org/2000/svg', 'use')
    ans.appendChild(u)
    if name:
        ans.firstChild.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', '#icon-' + name)
    if tooltip:
        tt = document.createElementNS('http://www.w3.org/2000/svg', 'title')
        tt.textContent = tooltip
        ans.appendChild(tt)
    return ans

def element(elem_id, child_selector):
    ans = document.getElementById(elem_id) if elem_id else document.body
    if child_selector:
        ans = ans.querySelector(child_selector)
    return ans

def selector(id_selector, *args):
    ans = '#' + id_selector
    for x in args:
        ans += ' ' + x
    return ans

def rule(id_selector, *args, **kw):
    return build_rule(selector(id_selector, *args), **kw)

def unique_id(prefix):
    prefix = prefix or 'auto-id'
    unique_id.counts[prefix] = num = (unique_id.counts[prefix] or 0) + 1
    return prefix + '-' + num
unique_id.counts = {}

def ensure_id(w, prefix):
    ans = w.getAttribute('id')
    if not ans:
        ans = unique_id(prefix)
        w.setAttribute('id', ans)
    return ans

extra_css = v'[]'
add_extra_css = extra_css.push.bind(extra_css)

def get_widget_css():
    ans = v'[]'
    for func in extra_css:
        ans.push(func())
    return ans.join('\n')


def set_radio_group_value(parent, name, val):
    changed = False
    for inp in parent.querySelectorAll(f'input[name={name}]'):
        inp.checked = inp.value is val
        changed = True
    if not changed:
        raise KeyError(f'No radio group with name={name} found')