'use strict';

var utils = require('../utils.js');
require('eslint-visitor-keys');
require('espree');
require('estraverse');

const optionDefaults = {
  allow: "none"
};
const messages = {
  moveToNewLine: "`{{descriptor}}` must be placed on a new line"
};
var jsxOneExpressionPerLine = utils.createRule({
  name: "jsx-one-expression-per-line",
  package: "jsx",
  meta: {
    type: "layout",
    docs: {
      description: "Require one JSX element per line"
    },
    fixable: "whitespace",
    messages,
    schema: [
      {
        type: "object",
        properties: {
          allow: {
            type: "string",
            enum: ["none", "literal", "single-child", "single-line", "non-jsx"]
          }
        },
        default: optionDefaults,
        additionalProperties: false
      }
    ]
  },
  create(context) {
    const options = Object.assign({}, optionDefaults, context.options[0]);
    function nodeKey(node) {
      return `${node.loc.start.line},${node.loc.start.column}`;
    }
    function nodeDescriptor(n) {
      return "openingElement" in n && n.openingElement && "name" in n.openingElement.name ? String(n.openingElement.name.name) : context.sourceCode.getText(n).replace(/\n/g, "");
    }
    function handleJSX(node) {
      const children = node.children;
      if (!children || !children.length)
        return;
      if (options.allow === "non-jsx" && !children.find((child) => child.type === "JSXFragment" || child.type === "JSXElement")) {
        return;
      }
      const openingElement = node.openingElement || node.openingFragment;
      const closingElement = node.closingElement || node.closingFragment;
      const openingElementStartLine = openingElement.loc.start.line;
      const openingElementEndLine = openingElement.loc.end.line;
      const closingElementStartLine = closingElement.loc.start.line;
      const closingElementEndLine = closingElement.loc.end.line;
      if (children.length === 1) {
        const child = children[0];
        if (openingElementStartLine === openingElementEndLine && openingElementEndLine === closingElementStartLine && closingElementStartLine === closingElementEndLine && closingElementEndLine === child.loc.start.line && child.loc.start.line === child.loc.end.line) {
          if (options.allow === "single-child" || options.allow === "literal" && (child.type === "Literal" || child.type === "JSXText") || options.allow === "single-line") {
            return;
          }
        }
      }
      if (options.allow === "single-line") {
        const firstChild = children[0];
        const lastChild = children[children.length - 1];
        const lineDifference = lastChild.loc.end.line - firstChild.loc.start.line;
        let lineBreaks = 0;
        if (firstChild.type === "Literal" || firstChild.type === "JSXText") {
          if (/^\s*?\n/.test(firstChild.raw))
            lineBreaks += 1;
        }
        if (lastChild.type === "Literal" || lastChild.type === "JSXText") {
          if (/\n\s*$/.test(lastChild.raw))
            lineBreaks += 1;
        }
        if (lineDifference === 0 && lineBreaks === 0 || lineDifference === 2 && lineBreaks === 2)
          return;
      }
      const childrenGroupedByLine = {};
      const fixDetailsByNode = {};
      children.forEach((child) => {
        let countNewLinesBeforeContent = 0;
        let countNewLinesAfterContent = 0;
        if (child.type === "Literal" || child.type === "JSXText") {
          if (utils.isWhiteSpaces(child.raw))
            return;
          countNewLinesBeforeContent = (child.raw.match(/^\s*\n/g) || []).length;
          countNewLinesAfterContent = (child.raw.match(/\n\s*$/g) || []).length;
        }
        const startLine = child.loc.start.line + countNewLinesBeforeContent;
        const endLine = child.loc.end.line - countNewLinesAfterContent;
        if (startLine === endLine) {
          if (!childrenGroupedByLine[startLine])
            childrenGroupedByLine[startLine] = [];
          childrenGroupedByLine[startLine].push(child);
        } else {
          if (!childrenGroupedByLine[startLine])
            childrenGroupedByLine[startLine] = [];
          childrenGroupedByLine[startLine].push(child);
          if (!childrenGroupedByLine[endLine])
            childrenGroupedByLine[endLine] = [];
          childrenGroupedByLine[endLine].push(child);
        }
      });
      Object.keys(childrenGroupedByLine).forEach((_line) => {
        const line = parseInt(_line, 10);
        const firstIndex = 0;
        const lastIndex = childrenGroupedByLine[line].length - 1;
        childrenGroupedByLine[line].forEach((child, i) => {
          let prevChild;
          let nextChild;
          if (i === firstIndex) {
            if (line === openingElementEndLine)
              prevChild = openingElement;
          } else {
            prevChild = childrenGroupedByLine[line][i - 1];
          }
          if (i === lastIndex) {
            if (line === closingElementStartLine)
              nextChild = closingElement;
          }
          if (!prevChild && !nextChild)
            return;
          const spaceBetweenPrev = () => {
            return (prevChild.type === "Literal" || prevChild.type === "JSXText") && prevChild.raw.endsWith(" ") || (child.type === "Literal" || child.type === "JSXText") && child.raw.startsWith(" ") || context.sourceCode.isSpaceBetweenTokens(prevChild, child);
          };
          const spaceBetweenNext = () => {
            return (nextChild.type === "Literal" || nextChild.type === "JSXText") && nextChild.raw.startsWith(" ") || (child.type === "Literal" || child.type === "JSXText") && child.raw.endsWith(" ") || context.sourceCode.isSpaceBetweenTokens(child, nextChild);
          };
          const source = context.sourceCode.getText(child);
          const leadingSpace = !!(prevChild && spaceBetweenPrev());
          const trailingSpace = !!(nextChild && spaceBetweenNext());
          const leadingNewLine = !!prevChild;
          const trailingNewLine = !!nextChild;
          const key = nodeKey(child);
          if (!fixDetailsByNode[key]) {
            fixDetailsByNode[key] = {
              node: child,
              source,
              descriptor: nodeDescriptor(child)
            };
          }
          if (leadingSpace)
            fixDetailsByNode[key].leadingSpace = true;
          if (leadingNewLine)
            fixDetailsByNode[key].leadingNewLine = true;
          if (trailingNewLine)
            fixDetailsByNode[key].trailingNewLine = true;
          if (trailingSpace)
            fixDetailsByNode[key].trailingSpace = true;
        });
      });
      Object.keys(fixDetailsByNode).forEach((key) => {
        const details = fixDetailsByNode[key];
        const nodeToReport = details.node;
        const descriptor = details.descriptor;
        const source = details.source.replace(/(^ +| +$)/g, "");
        const leadingSpaceString = details.leadingSpace ? "\n{' '}" : "";
        const trailingSpaceString = details.trailingSpace ? "{' '}\n" : "";
        const leadingNewLineString = details.leadingNewLine ? "\n" : "";
        const trailingNewLineString = details.trailingNewLine ? "\n" : "";
        const replaceText = `${leadingSpaceString}${leadingNewLineString}${source}${trailingNewLineString}${trailingSpaceString}`;
        context.report({
          messageId: "moveToNewLine",
          node: nodeToReport,
          data: {
            descriptor
          },
          fix(fixer) {
            return fixer.replaceText(nodeToReport, replaceText);
          }
        });
      });
    }
    return {
      JSXElement: handleJSX,
      JSXFragment: handleJSX
    };
  }
});

module.exports = jsxOneExpressionPerLine;