"use strict";

var _interopRequire = function (obj) { return obj && obj.__esModule ? obj["default"] : obj; };

var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };

var Declaration = _interopRequire(require("./declaration"));

var tokenizer = _interopRequire(require("./tokenize"));

var Comment = _interopRequire(require("./comment"));

var AtRule = _interopRequire(require("./at-rule"));

var Root = _interopRequire(require("./root"));

var Rule = _interopRequire(require("./rule"));

// CSS parser

var Parser = (function () {
    function Parser(input) {
        _classCallCheck(this, Parser);

        this.input = input;

        this.pos = 0;
        this.root = new Root();
        this.current = this.root;
        this.spaces = "";
        this.semicolon = false;

        this.root.source = { input: input };
        if (input.map) this.root.prevMap = input.map;
    }

    Parser.prototype.tokenize = function tokenize() {
        this.tokens = tokenizer(this.input);
    };

    Parser.prototype.loop = function loop() {
        var token;
        while (this.pos < this.tokens.length) {
            token = this.tokens[this.pos];

            switch (token[0]) {
                case "word":
                case ":":
                    this.word(token);
                    break;

                case "}":
                    this.end(token);
                    break;

                case "comment":
                    this.comment(token);
                    break;

                case "at-word":
                    this.atrule(token);
                    break;

                case "{":
                    this.emptyRule(token);
                    break;

                default:
                    this.spaces += token[1];
                    break;
            }

            this.pos += 1;
        }
        this.endFile();
    };

    Parser.prototype.comment = function comment(token) {
        var node = new Comment();
        this.init(node, token[2], token[3]);
        node.source.end = { line: token[4], column: token[5] };

        var text = token[1].slice(2, -2);
        if (text.match(/^\s*$/)) {
            node.left = text;
            node.text = "";
            node.right = "";
        } else {
            var match = text.match(/^(\s*)([^]*[^\s])(\s*)$/);
            node.left = match[1];
            node.text = match[2];
            node.right = match[3];
        }
    };

    Parser.prototype.emptyRule = function emptyRule(token) {
        var node = new Rule();
        this.init(node, token[2], token[3]);
        node.between = "";
        node.selector = "";
        this.current = node;
    };

    Parser.prototype.word = function word() {
        var token;
        var end = false;
        var type = null;
        var colon = false;
        var bracket = null;
        var brackets = 0;

        var start = this.pos;
        this.pos += 1;
        while (true) {
            token = this.tokens[this.pos];
            if (!token) {
                this.pos -= 1;
                end = true;
                break;
            }

            type = token[0];
            if (type == "(") {
                if (!bracket) bracket = token;
                brackets += 1;
            } else if (type == ")") {
                brackets -= 1;
                if (brackets === 0) bracket = null;
            } else if (brackets === 0) {
                if (type == ";") {
                    if (colon) {
                        this.decl(this.tokens.slice(start, this.pos + 1));
                        return;
                    } else {
                        break;
                    }
                } else if (type == "{") {
                    this.rule(this.tokens.slice(start, this.pos + 1));
                    return;
                } else if (type == "}") {
                    this.pos -= 1;
                    end = true;
                    break;
                } else if (type == "at-word") {
                    this.pos -= 1;
                    break;
                } else {
                    if (type == ":") colon = true;
                }
            }

            this.pos += 1;
        }

        if (brackets > 0 && !this.input.safe) {
            throw this.input.error("Unclosed bracket", bracket[2], bracket[3]);
        }

        if (end && colon) {
            while (this.pos > start) {
                token = this.tokens[this.pos][0];
                if (token != "space" && token != "comment") break;
                this.pos -= 1;
            }
            this.decl(this.tokens.slice(start, this.pos + 1));
            return;
        }

        if (this.input.safe) {
            var buffer = this.tokens.slice(start, this.pos + 1);
            this.spaces += buffer.map(function (i) {
                return i[1];
            }).join("");
        } else {
            token = this.tokens[start];
            throw this.input.error("Unknown word", token[2], token[3]);
        }
    };

    Parser.prototype.rule = function rule(tokens) {
        tokens.pop();

        var node = new Rule();
        this.init(node, tokens[0][2], tokens[0][3]);

        node.between = this.spacesFromEnd(tokens);
        this.raw(node, "selector", tokens);
        this.current = node;
    };

    Parser.prototype.decl = function decl(tokens) {
        var node = new Declaration();
        this.init(node);

        var last = tokens[tokens.length - 1];
        if (last[0] == ";") {
            this.semicolon = true;
            tokens.pop();
        }
        if (last[4]) {
            node.source.end = { line: last[4], column: last[5] };
        } else {
            node.source.end = { line: last[2], column: last[3] };
        }

        while (tokens[0][0] != "word") {
            node.before += tokens.shift()[1];
        }
        node.source.start = { line: tokens[0][2], column: tokens[0][3] };

        node.prop = tokens.shift()[1];
        node.between = "";

        var token;
        while (tokens.length) {
            token = tokens.shift();

            if (token[0] == ":") {
                node.between += token[1];
                break;
            } else if (token[0] != "space" && token[0] != "comment") {
                this.unknownWord(node, token, tokens);
            } else {
                node.between += token[1];
            }
        }

        if (node.prop[0] == "_" || node.prop[0] == "*") {
            node.before += node.prop[0];
            node.prop = node.prop.slice(1);
        }
        node.between += this.spacesFromStart(tokens);

        if (this.input.safe) this.checkMissedSemicolon(tokens);

        for (var i = tokens.length - 1; i > 0; i--) {
            token = tokens[i];
            if (token[1] == "!important") {
                node.important = true;
                var string = this.stringFrom(tokens, i);
                string = this.spacesFromEnd(tokens) + string;
                if (string != " !important") node._important = string;
                break;
            } else if (token[0] != "space" && token[0] != "comment") {
                break;
            }
        }

        this.raw(node, "value", tokens);

        if (node.value.indexOf(":") != -1 && !this.input.safe) {
            this.checkMissedSemicolon(tokens);
        }
    };

    Parser.prototype.atrule = function atrule(token) {
        var node = new AtRule();
        node.name = token[1].slice(1);
        if (node.name === "") {
            if (this.input.safe) {
                node.name = "";
            } else {
                throw this.input.error("At-rule without name", token[2], token[3]);
            }
        }
        this.init(node, token[2], token[3]);

        var next;
        var last = false;
        var open = false;
        var params = [];
        while (true) {
            this.pos += 1;
            token = this.tokens[this.pos];

            if (!token) {
                last = true;
                break;
            } else if (token[0] == ";") {
                node.source.end = { line: token[2], column: token[3] };
                this.semicolon = true;
                break;
            } else if (token[0] == "{") {
                open = true;
                break;
            } else {
                params.push(token);
            }
        }

        node.between = this.spacesFromEnd(params);
        if (params.length) {
            node.afterName = this.spacesFromStart(params);
            this.raw(node, "params", params);
            if (last) {
                token = params[params.length - 1];
                node.source.end = { line: token[4], column: token[5] };
                this.spaces = node.between;
                node.between = "";
            }
        } else {
            node.afterName = "";
            node.params = "";
        }

        if (open) {
            node.nodes = [];
            this.current = node;
        }
    };

    Parser.prototype.end = function end(token) {
        if (this.current.nodes && this.current.nodes.length) {
            this.current.semicolon = this.semicolon;
        }
        this.semicolon = false;

        this.current.after = (this.current.after || "") + this.spaces;
        this.spaces = "";

        if (this.current.parent) {
            this.current.source.end = { line: token[2], column: token[3] };
            this.current = this.current.parent;
        } else if (!this.input.safe) {
            throw this.input.error("Unexpected }", token[2], token[3]);
        } else {
            this.current.after += "}";
        }
    };

    Parser.prototype.endFile = function endFile() {
        if (this.current.parent && !this.input.safe) {
            var pos = this.current.source.start;
            throw this.input.error("Unclosed block", pos.line, pos.column);
        }

        if (this.current.nodes && this.current.nodes.length) {
            this.current.semicolon = this.semicolon;
        }
        this.current.after = (this.current.after || "") + this.spaces;

        while (this.current.parent) {
            this.current = this.current.parent;
            this.current.after = "";
        }
    };

    Parser.prototype.unknownWord = function unknownWord(node, token) {
        if (this.input.safe) {
            node.source.start = { line: token[2], column: token[3] };
            node.before += node.prop + node.between;
            node.prop = token[1];
            node.between = "";
        } else {
            throw this.input.error("Unknown word", token[2], token[3]);
        }
    };

    Parser.prototype.checkMissedSemicolon = function checkMissedSemicolon(tokens) {
        var prev = null;
        var colon = false;
        var brackets = 0;
        var type, token;
        for (var i = 0; i < tokens.length; i++) {
            token = tokens[i];
            type = token[0];

            if (type == "(") {
                brackets += 1;
            } else if (type == ")") {
                brackets -= 0;
            } else if (brackets === 0 && type == ":") {
                if (!prev && this.input.safe) {
                    continue;
                } else if (!prev) {
                    throw this.input.error("Double colon", token[2], token[3]);
                } else if (prev[0] == "word" && prev[1] == "progid") {
                    continue;
                } else {
                    colon = i;
                    break;
                }
            }

            prev = token;
        }

        if (colon === false) {
            return;
        }if (this.input.safe) {
            var split;
            for (split = colon - 1; split >= 0; split--) {
                if (tokens[split][0] == "word") break;
            }
            for (split -= 1; split >= 0; split--) {
                if (tokens[split][0] != "space") {
                    split += 1;
                    break;
                }
            }
            var other = tokens.splice(split, tokens.length - split);
            this.decl(other);
        } else {
            var founded = 0;
            for (var j = colon - 1; j >= 0; j--) {
                token = tokens[j];
                if (token[0] != "space") {
                    founded += 1;
                    if (founded == 2) break;
                }
            }
            throw this.input.error("Missed semicolon", token[4], token[5]);
        }
    };

    // Helpers

    Parser.prototype.init = function init(node, line, column) {
        this.current.push(node);

        node.source = { start: { line: line, column: column }, input: this.input };
        node.before = this.spaces;
        this.spaces = "";
        if (node.type != "comment") this.semicolon = false;
    };

    Parser.prototype.raw = function raw(node, prop, tokens) {
        var token;
        var value = "";
        var clean = true;
        for (var _iterator = tokens, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
            if (_isArray) {
                if (_i >= _iterator.length) break;
                token = _iterator[_i++];
            } else {
                _i = _iterator.next();
                if (_i.done) break;
                token = _i.value;
            }

            if (token[0] == "comment") {
                clean = false;
            } else {
                value += token[1];
            }
        }
        if (!clean) {
            var origin = "";
            for (var _iterator2 = tokens, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : _iterator2[Symbol.iterator]();;) {
                if (_isArray2) {
                    if (_i2 >= _iterator2.length) break;
                    token = _iterator2[_i2++];
                } else {
                    _i2 = _iterator2.next();
                    if (_i2.done) break;
                    token = _i2.value;
                }

                origin += token[1];
            }node["_" + prop] = { value: value, raw: origin };
        }
        node[prop] = value;
    };

    Parser.prototype.spacesFromEnd = function spacesFromEnd(tokens) {
        var next;
        var spaces = "";
        while (tokens.length) {
            next = tokens[tokens.length - 1][0];
            if (next != "space" && next != "comment") break;
            spaces += tokens.pop()[1];
        }
        return spaces;
    };

    Parser.prototype.spacesFromStart = function spacesFromStart(tokens) {
        var next;
        var spaces = "";
        while (tokens.length) {
            next = tokens[0][0];
            if (next != "space" && next != "comment") break;
            spaces += tokens.shift()[1];
        }
        return spaces;
    };

    Parser.prototype.stringFrom = function stringFrom(tokens, from) {
        var result = "";
        for (var i = from; i < tokens.length; i++) {
            result += tokens[i][1];
        }
        tokens.splice(from, tokens.length - from);
        return result;
    };

    return Parser;
})();

module.exports = Parser;