/**
 * @fileoverview enforce ordering of attributes
 * @author Erin Depew
 */
'use strict'
const utils = require('../utils')

// ------------------------------------------------------------------------------
// Rule Definition
// ------------------------------------------------------------------------------

function getAttributeType (name, isDirective) {
  if (isDirective) {
    if (name === 'for') {
      return 'LIST_RENDERING'
    } else if (name === 'if' || name === 'else-if' || name === 'else' || name === 'show' || name === 'cloak') {
      return 'CONDITIONALS'
    } else if (name === 'pre' || name === 'once') {
      return 'RENDER_MODIFIERS'
    } else if (name === 'model' || name === 'bind') {
      return 'BINDING'
    } else if (name === 'on') {
      return 'EVENTS'
    } else if (name === 'html' || name === 'text') {
      return 'CONTENT'
    }
  } else {
    if (name === 'is') {
      return 'DEFINITION'
    } else if (name === 'id') {
      return 'GLOBAL'
    } else if (name === 'ref' || name === 'key' || name === 'slot' || name === 'slot-scope') {
      return 'UNIQUE'
    } else {
      return 'OTHER_ATTR'
    }
  }
}
function getPosition (attribute, attributeOrder) {
  const attributeType = getAttributeType(attribute.key.name, attribute.directive)
  return attributeOrder.indexOf(attributeType)
}

function create (context) {
  const sourceCode = context.getSourceCode()
  let attributeOrder = ['DEFINITION', 'LIST_RENDERING', 'CONDITIONALS', 'RENDER_MODIFIERS', 'GLOBAL', 'UNIQUE', 'BINDING', 'OTHER_ATTR', 'EVENTS', 'CONTENT']
  if (context.options[0] && context.options[0].order) {
    attributeOrder = context.options[0].order
  }
  let currentPosition
  let previousNode

  function reportIssue (node, previousNode) {
    const currentNode = sourceCode.getText(node.key)
    const prevNode = sourceCode.getText(previousNode.key)
    context.report({
      node: node.key,
      loc: node.loc,
      message: `Attribute "${currentNode}" should go before "${prevNode}".`,
      data: {
        currentNode
      },

      fix (fixer) {
        const attributes = node.parent.attributes
        const shiftAttrs = attributes.slice(attributes.indexOf(previousNode), attributes.indexOf(node) + 1)

        // If we can upgrade requirements to `eslint@>4.1.0`, this code can be replaced by:
        // return shiftAttrs.map((attr, i) => {
        //   const text = attr === previousNode ? sourceCode.getText(node) : sourceCode.getText(shiftAttrs[i - 1])
        //   return fixer.replaceText(attr, text)
        // })
        const replaceDataList = shiftAttrs.map((attr, i) => {
          const text = attr === previousNode ? sourceCode.getText(node) : sourceCode.getText(shiftAttrs[i - 1])
          return {
            range: attr.range,
            text
          }
        })
        const replaceRange = [previousNode.range[0], node.range[1]]
        let text = sourceCode.text.slice(replaceRange[0], replaceRange[1])
        replaceDataList.reverse().forEach((data) => {
          const textRange = data.range.map(r => r - replaceRange[0])
          text = text.slice(0, textRange[0]) + data.text + text.slice(textRange[1], text.length)
        })
        return fixer.replaceTextRange(replaceRange, text)
      }
    })
  }

  return utils.defineTemplateBodyVisitor(context, {
    'VStartTag' () {
      currentPosition = -1
      previousNode = null
    },
    'VAttribute' (node) {
      if ((currentPosition === -1) || (currentPosition <= getPosition(node, attributeOrder))) {
        currentPosition = getPosition(node, attributeOrder)
        previousNode = node
      } else {
        reportIssue(node, previousNode)
      }
    }
  })
}

module.exports = {
  meta: {
    docs: {
      description: 'enforce order of attributes',
      category: 'recommended',
      url: 'https://github.com/vuejs/eslint-plugin-vue/blob/v4.5.0/docs/rules/attributes-order.md'
    },
    fixable: 'code',
    schema: {
      type: 'array',
      properties: {
        order: {
          items: {
            type: 'string'
          },
          maxItems: 10,
          minItems: 10
        }
      }
    }
  },
  create
}