/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
import * as Parser from '../parser/jsonParser';
import { Range } from '../jsonLanguageTypes';
export class JSONHover {
    constructor(schemaService, contributions = [], promiseConstructor) {
        this.schemaService = schemaService;
        this.contributions = contributions;
        this.promise = promiseConstructor || Promise;
    }
    doHover(document, position, doc) {
        const offset = document.offsetAt(position);
        let node = doc.getNodeFromOffset(offset);
        if (!node || (node.type === 'object' || node.type === 'array') && offset > node.offset + 1 && offset < node.offset + node.length - 1) {
            return this.promise.resolve(null);
        }
        const hoverRangeNode = node;
        // use the property description when hovering over an object key
        if (node.type === 'string') {
            const parent = node.parent;
            if (parent && parent.type === 'property' && parent.keyNode === node) {
                node = parent.valueNode;
                if (!node) {
                    return this.promise.resolve(null);
                }
            }
        }
        const hoverRange = Range.create(document.positionAt(hoverRangeNode.offset), document.positionAt(hoverRangeNode.offset + hoverRangeNode.length));
        const createHover = (contents) => {
            const result = {
                contents: contents,
                range: hoverRange
            };
            return result;
        };
        const location = Parser.getNodePath(node);
        for (let i = this.contributions.length - 1; i >= 0; i--) {
            const contribution = this.contributions[i];
            const promise = contribution.getInfoContribution(document.uri, location);
            if (promise) {
                return promise.then(htmlContent => createHover(htmlContent));
            }
        }
        return this.schemaService.getSchemaForResource(document.uri, doc).then((schema) => {
            if (!schema) {
                return null;
            }
            let title = undefined;
            let markdownDescription = undefined;
            let markdownEnumValueDescription = undefined, enumValue = undefined;
            const matchingSchemas = doc.getMatchingSchemas(schema.schema, node.offset).filter((s) => s.node === node && !s.inverted).map((s) => s.schema);
            for (const schema of matchingSchemas) {
                title = title || schema.title;
                markdownDescription = markdownDescription || schema.markdownDescription || toMarkdown(schema.description);
                if (schema.enum) {
                    const idx = schema.enum.indexOf(Parser.getNodeValue(node));
                    if (schema.markdownEnumDescriptions) {
                        markdownEnumValueDescription = schema.markdownEnumDescriptions[idx];
                    }
                    else if (schema.enumDescriptions) {
                        markdownEnumValueDescription = toMarkdown(schema.enumDescriptions[idx]);
                    }
                    if (markdownEnumValueDescription) {
                        enumValue = schema.enum[idx];
                        if (typeof enumValue !== 'string') {
                            enumValue = JSON.stringify(enumValue);
                        }
                    }
                }
            }
            let result = '';
            if (title) {
                result = toMarkdown(title);
            }
            if (markdownDescription) {
                if (result.length > 0) {
                    result += "\n\n";
                }
                result += markdownDescription;
            }
            if (markdownEnumValueDescription) {
                if (result.length > 0) {
                    result += "\n\n";
                }
                result += `\`${toMarkdownCodeBlock(enumValue)}\`: ${markdownEnumValueDescription}`;
            }
            return createHover([result]);
        });
    }
}
function toMarkdown(plain) {
    if (plain) {
        return plain
            .trim()
            .replace(/[\\`*_{}[\]()<>#+\-.!]/g, '\\$&') // escape markdown syntax tokens: http://daringfireball.net/projects/markdown/syntax#backslash
            .replace(/(^ +)/mg, (_match, g1) => '&nbsp;'.repeat(g1.length)) // escape leading spaces on each line
            .replace(/( {2,})/g, (_match, g1) => ' ' + '&nbsp;'.repeat(g1.length - 1)) // escape consecutive spaces
            .replace(/(\t+)/g, (_match, g1) => '&nbsp;'.repeat(g1.length * 4)) // escape tabs
            .replace(/\n/g, '\\\n'); // escape new lines
    }
    return undefined;
}
function toMarkdownCodeBlock(content) {
    // see https://daringfireball.net/projects/markdown/syntax#precode
    if (content.indexOf('`') !== -1) {
        return '`` ' + content + ' ``';
    }
    return content;
}
