/**
 * @fileoverview Disallow use of multiple spaces.
 * @author Nicholas C. Zakas
 * @deprecated in ESLint v8.53.0
 */

'use strict';

const astUtils = require('./utils/ast-utils');

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

/** @type {import('../types').Rule.RuleModule} */
module.exports = {
  meta: {
    deprecated: {
      message: 'Formatting rules are being moved out of ESLint core.',
      url: 'https://eslint.org/blog/2023/10/deprecating-formatting-rules/',
      deprecatedSince: '8.53.0',
      availableUntil: '10.0.0',
      replacedBy: [
        {
          message:
            'ESLint Stylistic now maintains deprecated stylistic core rules.',
          url: 'https://eslint.style/guide/migration',
          plugin: {
            name: '@stylistic/eslint-plugin-js',
            url: 'https://eslint.style/packages/js',
          },
          rule: {
            name: 'no-multi-spaces',
            url: 'https://eslint.style/rules/js/no-multi-spaces',
          },
        },
      ],
    },
    type: 'layout',

    docs: {
      description: 'Disallow multiple spaces',
      recommended: false,
      url: 'https://eslint.org/docs/latest/rules/no-multi-spaces',
    },

    fixable: 'whitespace',

    schema: [
      {
        type: 'object',
        properties: {
          exceptions: {
            type: 'object',
            patternProperties: {
              '^([A-Z][a-z]*)+$': {
                type: 'boolean',
              },
            },
            additionalProperties: false,
          },
          ignoreEOLComments: {
            type: 'boolean',
            default: false,
          },
        },
        additionalProperties: false,
      },
    ],

    messages: {
      multipleSpaces: "Multiple spaces found before '{{displayValue}}'.",
    },
  },

  create(context) {
    const sourceCode = context.sourceCode;
    const options = context.options[0] || {};
    const ignoreEOLComments = options.ignoreEOLComments;
    const exceptions = Object.assign({ Property: true }, options.exceptions);
    const hasExceptions = Object.keys(exceptions).some(
      (key) => exceptions[key]
    );

    /**
     * Formats value of given comment token for error message by truncating its length.
     * @param {Token} token comment token
     * @returns {string} formatted value
     * @private
     */
    function formatReportedCommentValue(token) {
      const valueLines = token.value.split('\n');
      const value = valueLines[0];
      const formattedValue = `${value.slice(0, 12)}...`;

      return valueLines.length === 1 && value.length <= 12 ?
          value
        : formattedValue;
    }

    //--------------------------------------------------------------------------
    // Public
    //--------------------------------------------------------------------------

    return {
      Program() {
        sourceCode.tokensAndComments.forEach(
          (leftToken, leftIndex, tokensAndComments) => {
            if (leftIndex === tokensAndComments.length - 1) {
              return;
            }
            const rightToken = tokensAndComments[leftIndex + 1];

            // Ignore tokens that don't have 2 spaces between them or are on different lines
            if (
              !sourceCode.text
                .slice(leftToken.range[1], rightToken.range[0])
                .includes('  ') ||
              leftToken.loc.end.line < rightToken.loc.start.line
            ) {
              return;
            }

            // Ignore comments that are the last token on their line if `ignoreEOLComments` is active.
            if (
              ignoreEOLComments &&
              astUtils.isCommentToken(rightToken) &&
              (leftIndex === tokensAndComments.length - 2 ||
                rightToken.loc.end.line <
                  tokensAndComments[leftIndex + 2].loc.start.line)
            ) {
              return;
            }

            // Ignore tokens that are in a node in the "exceptions" object
            if (hasExceptions) {
              const parentNode = sourceCode.getNodeByRangeIndex(
                rightToken.range[0] - 1
              );

              if (parentNode && exceptions[parentNode.type]) {
                return;
              }
            }

            let displayValue;

            if (rightToken.type === 'Block') {
              displayValue = `/*${formatReportedCommentValue(rightToken)}*/`;
            } else if (rightToken.type === 'Line') {
              displayValue = `//${formatReportedCommentValue(rightToken)}`;
            } else {
              displayValue = rightToken.value;
            }

            context.report({
              node: rightToken,
              loc: {
                start: leftToken.loc.end,
                end: rightToken.loc.start,
              },
              messageId: 'multipleSpaces',
              data: { displayValue },
              fix: (fixer) =>
                fixer.replaceTextRange(
                  [leftToken.range[1], rightToken.range[0]],
                  ' '
                ),
            });
          }
        );
      },
    };
  },
};