/**
 * {常用方法库}
 * @author yutent<yutent.io@gmail.com>
 * @date 2023/03/07 22:11:30
 */

export function noop() {}

export function $(selector, container, multi) {
  let fn = multi ? 'querySelectorAll' : 'querySelector'
  if (container) {
    return container[fn](selector)
  }
  return document.body[fn](selector)
}

export function $$(selector, container) {
  return $(selector, container, true)
}

export const nextTick = (function () {
  let queue = []
  let node = document.createTextNode('<!-- -->')
  let bool = false

  function callback() {
    while (queue.length > 0) {
      let fn = queue.shift()
      try {
        fn()
      } catch (err) {
        console.error(err)
      }
    }
  }

  new MutationObserver(callback).observe(node, { characterData: true })

  return function (fn) {
    queue.push(fn)
    bool = !bool
    node.data = bool
  }
})()

export function range(...args) {
  let start = 0,
    end = 0,
    step = 1,
    out = []
  switch (args.length) {
    case 1:
      end = args[0]
      break
    case 2:
    case 3:
      ;[start, end, step = 1] = args
      step = Math.abs(step) || 1
      break
  }

  if (start > end) {
    ;[start, end] = [end, start]
  }

  for (let i = start; i < end; i += step) {
    out.push(i)
  }
  return out
}

//驼峰转换为连字符线风格
export function hyphen(target) {
  return target.replace(/([a-z\d])([A-Z]+)/g, '$1-$2').toLowerCase()
}

//连字符转换为驼峰风格
export function camelize(target) {
  //提前判断，提高效率
  if (target.indexOf('-') < 0) {
    return target
  }
  return target.replace(/\-([a-z])/g, (m, s) => s.toUpperCase())
}

//取得距离页面左上角的坐标
export function offset(node) {
  try {
    let rect = node.getBoundingClientRect()

    if (rect.width || rect.height || node.getClientRects().length) {
      let doc = node.ownerDocument
      let root = doc.documentElement
      let win = doc.defaultView
      return {
        top: rect.top + win.pageYOffset - root.clientTop,
        left: rect.left + win.pageXOffset - root.clientLeft
      }
    }
  } catch (e) {
    return {
      left: 0,
      top: 0
    }
  }
}

/**
 * 事件绑定
 */
export function bind(dom, type = '', selector, fn, phase = false) {
  let events = type.split(',')
  let callback
  let isWc = dom && dom.host === dom
  let host = isWc ? dom : null

  if (!dom || !type) {
    return console.error(
      "Argument Error: function bind's arg 1 must be a document obejct"
    )
  }

  if (typeof selector === 'function') {
    phase = fn || false
    fn = selector
    selector = null
  } else {
    if (typeof selector !== 'string') {
      selector = null
    }
    fn = fn || noop
  }

  if (isWc === false) {
    let node = dom
    while (node && node !== document.body && node !== document) {
      if (node.ownHost) {
        isWc = true
        host = node.ownHost
        break
      }
      node = node.parentNode
    }
  }

  if (selector) {
    callback = function (ev) {
      let agents = $(selector, dom)
      let elem = ev.target
      if (agents) {
        while (true) {
          if (elem === dom) {
            break
          }
          if (agents.contains(elem)) {
            fn(ev)
            break
          } else {
            elem = elem.parentNode
          }
        }
      }
    }
  } else {
    callback = fn
  }

  events.forEach(function (t) {
    t = t.trim()
    if (isWc) {
      host.$events[t] ??= []

      let _list = host.$events[t]
      if (_list.length) {
        let idx = _list.findIndex(
          it =>
            it.el === dom && it.listener === callback && it.options === phase
        )
        if (idx > -1) {
          let item = _list[idx]
          _list.splice(idx, 1)
          dom.removeEventListener(t, item.listener, item.options)
        }
      }
      _list.push({ el: dom, listener: callback, options: phase })
    }
    dom.addEventListener(t, callback, phase)
  })
  return callback
}

/**
 * 解除事件绑定
 */
export function unbind(dom, type = '', fn = noop, phase = false) {
  let events = type.split(',')
  events.forEach(function (t) {
    dom.removeEventListener(t.trim(), fn, phase)
  })
}

// 指定节点外点击(最高不能超过body层)
export function outsideClick(dom, fn = noop) {
  return bind(document, 'mousedown', ev => {
    let path = ev.composedPath ? ev.composedPath() : ev.path
    if (path) {
      while (path.length > 3) {
        if (path.shift() === dom) {
          return
        }
      }
    } else {
      let target = ev.explicitOriginalTarget || ev.target
      if (
        dom === target ||
        dom.contains(target) ||
        (dom.root && dom.root.contains(target))
      ) {
        return
      }
    }

    fn(ev)
  })
}

export function clearOutsideClick(fn = noop) {
  unbind(document, 'mousedown', fn)
}

/**
 * @param el <DOM> 节点
 * @param name <String> 自定义的事件名
 * @param data <Object> 要合并进event对象的参数
 * @param stop <Boolean> 是否禁止事件冒泡
 */
export function fire(el, name = 'click', data = {}, stop) {
  let ev = new Event(name, { bubbles: !stop, cancelable: true })
  Object.assign(ev, data)
  el.dispatchEvent(ev)
}