const t = require('@babel/types')

const initStatement = t.expressionStatement(t.callExpression(t.identifier('$initSSP'), []))
const resolveStatement = t.expressionStatement(t.callExpression(t.identifier('$callSSP'), []))

module.exports = function getRenderSlot (path, state) {
  const name = path.get('arguments.0')
  const arg2 = path.get('arguments.2')
  const arg3 = path.get('arguments.3')
  let valueNode
  if (arg3) {
    // v-bind:object
    valueNode = arg3.node
  } else if (arg2 && !arg2.isNullLiteral()) {
    if (arg2.isObjectExpression()) {
      const propertiesPath = arg2.get('properties')
      const oldProperties = []
      const newProperties = []
      propertiesPath.forEach(path => {
        const properties = path.get('key').isStringLiteral({ value: 'SLOT_DEFAULT' }) ? oldProperties : newProperties
        properties.push(state.options.scopedSlotsCompiler === 'auto' ? path.node : t.cloneNode(path.node, true))
      })
      if (!newProperties.length) {
        return
      }
      valueNode = t.objectExpression(newProperties)
      if (state.options.scopedSlotsCompiler !== 'auto') {
        arg2.replaceWith(t.objectExpression(oldProperties))
      }
    } else {
      valueNode = arg2.node
    }
  }
  if (valueNode) {
    if (!state.declarationArray.includes(initStatement)) {
      state.declarationArray.push(initStatement)
    }
    const indexNode = t.callExpression(t.identifier('$setSSP'), [name.node, valueNode])
    const slotMultipleInstance = state.options.scopedSlotsCompiler === 'augmented' && state.options.slotMultipleInstance
    if (slotMultipleInstance) {
      // 插槽名拼接 '.'+index
      name.replaceWith(t.binaryExpression('+', name.node, t.binaryExpression('+', t.stringLiteral('.'), indexNode)))
    } else {
      const scoped = state.scoped
      // TODO 判断是否包含作用域内变量
      const renderSlotStatementArray = scoped && scoped.length ? scoped[scoped.length - 1].renderSlotStatementArray : state.renderSlotStatementArray
      renderSlotStatementArray.push(t.expressionStatement(indexNode))
    }
    if (!state.resolveSlotStatementArray.includes(resolveStatement)) {
      state.resolveSlotStatementArray.push(resolveStatement)
    }
  }
  // TODO 组件嵌套
}