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import { DocElementType, DocTreeNode } from "../docContainer.ts";
export class NodeHandler {
    private _testStart = new TextEncoder().encode('Deno.test({\n');    private _givenStart = new TextEncoder().encode('given_');    private _whenStart = new TextEncoder().encode('when_');    private _thenStart = new TextEncoder().encode('then_');
    isStartIndexForTest (buffer: Uint8Array, startIndex: number): boolean {        return this._isStartIndexForNodeType(buffer, startIndex, DocElementType.DocSection);    }
    isStartIndexForGiven (buffer: Uint8Array, startIndex: number): boolean {        return this._isStartIndexForNodeType(buffer, startIndex, DocElementType.DocGiven);    }
    isStartIndexForWhen (buffer: Uint8Array, startIndex: number): boolean {        return this._isStartIndexForNodeType(buffer, startIndex, DocElementType.DocWhen);    }
    isStartIndexForThen (buffer: Uint8Array, startIndex: number): boolean {        return this._isStartIndexForNodeType(buffer, startIndex, DocElementType.DocThen);    }
    private _isStartIndexForNodeType (buffer: Uint8Array, startIndex: number, nodeType: DocElementType): boolean {        const nodeStart = this._findNodeStart(nodeType);        for (let matchCounter = 0; matchCounter < nodeStart.length; matchCounter++) {            if (buffer[startIndex] !== nodeStart[matchCounter]) {                return false;            }            startIndex++;        }        return true;    }
    private _findNodeStart (nodeType: DocElementType): Uint8Array {        switch (nodeType) {            case DocElementType.DocGiven:                return this._givenStart;            case DocElementType.DocWhen:                return this._whenStart;            case DocElementType.DocThen:                return this._thenStart;            default:                return this._testStart;        }    }
    generateTestNode(parentNode: DocTreeNode, buffer: Uint8Array, startIndex: number): number {        return this._generateNodeForNodeType(parentNode, buffer, startIndex, DocElementType.DocSection);    }
    generateGivenNode(parentNode: DocTreeNode, buffer: Uint8Array, startIndex: number): number {        return this._generateNodeForNodeType(parentNode, buffer, startIndex, DocElementType.DocGiven);    }
    generateWhenNode(parentNode: DocTreeNode, buffer: Uint8Array, startIndex: number): number {        return this._generateNodeForNodeType(parentNode, buffer, startIndex, DocElementType.DocWhen);    }
    generateThenNode(parentNode: DocTreeNode, buffer: Uint8Array, startIndex: number): number {        return this._generateNodeForNodeType(parentNode, buffer, startIndex, DocElementType.DocThen);    }
    private _generateNodeForNodeType (parentNode: DocTreeNode, buffer: Uint8Array, startIndex: number, nodeType: DocElementType): number {        const nodeStart = this._findNodeStart(nodeType);        const extractedBuffer = this._buildNodeValue(buffer, startIndex + nodeStart.length, []);        const testNode = this._buildNode(extractedBuffer, nodeType);        parentNode.children.push(testNode);        return startIndex + nodeStart.length + extractedBuffer.length;    }        private _buildNodeValue (buffer: Uint8Array, startIndex: number, extractedBuffer: Array<number>): Array<number> {        if (this._isNewLineCode(buffer[startIndex])) {            return extractedBuffer;        } else {            extractedBuffer.push(buffer[startIndex]);            startIndex++;            return this._buildNodeValue(buffer, startIndex, extractedBuffer);        }    }
    private _isNewLineCode (element: number) {        return element === 10;    }
    private _buildNode (extractedBuffer: Array<number>, nodeType: DocElementType): DocTreeNode {        return {            value: (new TextDecoder().decode(new Uint8Array(extractedBuffer))).trim(),            type: nodeType,            children: []        };    }}