'use strict';

var anchors = require('../doc/anchors.js');
var Node = require('../nodes/Node.js');
var stringifyComment = require('./stringifyComment.js');
var stringifyString = require('./stringifyString.js');

function createStringifyContext(doc, options) {
    const opt = Object.assign({
        blockQuote: true,
        commentString: stringifyComment.stringifyComment,
        defaultKeyType: null,
        defaultStringType: 'PLAIN',
        directives: null,
        doubleQuotedAsJSON: false,
        doubleQuotedMinMultiLineLength: 40,
        falseStr: 'false',
        indentSeq: true,
        lineWidth: 80,
        minContentWidth: 20,
        nullStr: 'null',
        simpleKeys: false,
        singleQuote: null,
        trueStr: 'true',
        verifyAliasOrder: true
    }, doc.schema.toStringOptions, options);
    let inFlow;
    switch (opt.collectionStyle) {
        case 'block':
            inFlow = false;
            break;
        case 'flow':
            inFlow = true;
            break;
        default:
            inFlow = null;
    }
    return {
        anchors: new Set(),
        doc,
        indent: '',
        indentStep: typeof opt.indent === 'number' ? ' '.repeat(opt.indent) : '  ',
        inFlow,
        options: opt
    };
}
function getTagObject(tags, item) {
    if (item.tag) {
        const match = tags.filter(t => t.tag === item.tag);
        if (match.length > 0)
            return match.find(t => t.format === item.format) || match[0];
    }
    let tagObj = undefined;
    let obj;
    if (Node.isScalar(item)) {
        obj = item.value;
        const match = tags.filter(t => t.identify && t.identify(obj));
        tagObj =
            match.find(t => t.format === item.format) || match.find(t => !t.format);
    }
    else {
        obj = item;
        tagObj = tags.find(t => t.nodeClass && obj instanceof t.nodeClass);
    }
    if (!tagObj) {
        // @ts-ignore
        const name = obj && obj.constructor ? obj.constructor.name : typeof obj;
        throw new Error(`Tag not resolved for ${name} value`);
    }
    return tagObj;
}
// needs to be called before value stringifier to allow for circular anchor refs
function stringifyProps(node, tagObj, { anchors: anchors$1, doc }) {
    if (!doc.directives)
        return '';
    const props = [];
    const anchor = (Node.isScalar(node) || Node.isCollection(node)) && node.anchor;
    if (anchor && anchors.anchorIsValid(anchor)) {
        anchors$1.add(anchor);
        props.push(`&${anchor}`);
    }
    const tag = node.tag || (tagObj.default ? null : tagObj.tag);
    if (tag)
        props.push(doc.directives.tagString(tag));
    return props.join(' ');
}
function stringify(item, ctx, onComment, onChompKeep) {
    var _a;
    if (Node.isPair(item))
        return item.toString(ctx, onComment, onChompKeep);
    if (Node.isAlias(item)) {
        if (ctx.doc.directives)
            return item.toString(ctx);
        if ((_a = ctx.resolvedAliases) === null || _a === void 0 ? void 0 : _a.has(item)) {
            throw new TypeError(`Cannot stringify circular structure without alias nodes`);
        }
        else {
            if (ctx.resolvedAliases)
                ctx.resolvedAliases.add(item);
            else
                ctx.resolvedAliases = new Set([item]);
            item = item.resolve(ctx.doc);
        }
    }
    let tagObj = undefined;
    const node = Node.isNode(item)
        ? item
        : ctx.doc.createNode(item, { onTagObj: o => (tagObj = o) });
    if (!tagObj)
        tagObj = getTagObject(ctx.doc.schema.tags, node);
    const props = stringifyProps(node, tagObj, ctx);
    if (props.length > 0)
        ctx.indentAtStart = (ctx.indentAtStart || 0) + props.length + 1;
    const str = typeof tagObj.stringify === 'function'
        ? tagObj.stringify(node, ctx, onComment, onChompKeep)
        : Node.isScalar(node)
            ? stringifyString.stringifyString(node, ctx, onComment, onChompKeep)
            : node.toString(ctx, onComment, onChompKeep);
    if (!props)
        return str;
    return Node.isScalar(node) || str[0] === '{' || str[0] === '['
        ? `${props} ${str}`
        : `${props}\n${ctx.indent}${str}`;
}

exports.createStringifyContext = createStringifyContext;
exports.stringify = stringify;
