// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

;(function (mod) {
    if (typeof exports == 'object' && typeof module == 'object') mod(require('../../lib/codemirror'))
    else if (typeof define == 'function' && define.amd) define(['../../lib/codemirror'], mod)
    else mod(CodeMirror)
})(function (CodeMirror) {
    'use strict'

    CodeMirror.defineMode('cmake', function () {
        var variable_regex = /({)?[a-zA-Z0-9_]+(})?/

        function tokenString(stream, state) {
            var current,
                prev,
                found_var = false
            while (!stream.eol() && (current = stream.next()) != state.pending) {
                if (current === '$' && prev != '\\' && state.pending == '"') {
                    found_var = true
                    break
                }
                prev = current
            }
            if (found_var) {
                stream.backUp(1)
            }
            if (current == state.pending) {
                state.continueString = false
            } else {
                state.continueString = true
            }
            return 'string'
        }

        function tokenize(stream, state) {
            var ch = stream.next()

            // Have we found a variable?
            if (ch === '$') {
                if (stream.match(variable_regex)) {
                    return 'variable-2'
                }
                return 'variable'
            }
            // Should we still be looking for the end of a string?
            if (state.continueString) {
                // If so, go through the loop again
                stream.backUp(1)
                return tokenString(stream, state)
            }
            // Do we just have a function on our hands?
            // In 'cmake_minimum_required (VERSION 2.8.8)', 'cmake_minimum_required' is matched
            if (stream.match(/(\s+)?\w+\(/) || stream.match(/(\s+)?\w+\ \(/)) {
                stream.backUp(1)
                return 'def'
            }
            if (ch == '#') {
                stream.skipToEnd()
                return 'comment'
            }
            // Have we found a string?
            if (ch == "'" || ch == '"') {
                // Store the type (single or double)
                state.pending = ch
                // Perform the looping function to find the end
                return tokenString(stream, state)
            }
            if (ch == '(' || ch == ')') {
                return 'bracket'
            }
            if (ch.match(/[0-9]/)) {
                return 'number'
            }
            stream.eatWhile(/[\w-]/)
            return null
        }
        return {
            startState: function () {
                var state = {}
                state.inDefinition = false
                state.inInclude = false
                state.continueString = false
                state.pending = false
                return state
            },
            token: function (stream, state) {
                if (stream.eatSpace()) return null
                return tokenize(stream, state)
            },
        }
    })

    CodeMirror.defineMIME('text/x-cmake', 'cmake')
})