/* eslint-disable @stylistic/indent-binary-ops */
import { tryParseFunction, tryParseRegularExpressionLiteral, tryParseStringLiteral } from "@ast/util";
import { AnyFindType, Discriminate, OutgoingMessage } from "@type/server";

import { createSourceFile, isCallExpression, Node, ScriptTarget } from "typescript";
import { CodeLens, CodeLensProvider, Range } from "vscode";

const vencordWebpackImportRegex = /import \{(.+?)\} from ['`"]@webpack(\/.+?)?['`"]/;

export const WebpackCodeLensProvider: CodeLensProvider = {
    provideCodeLenses(document) {
        const text = document.getText();
        const match = vencordWebpackImportRegex.exec(text);

        if (!match)
            return [];

        const finds = match[1].split(",")
            .map((s) => s.trim())
            .filter((s) => s.startsWith("find"));

        if (!finds.length)
            return [];

        const sourceFile = createSourceFile(document.fileName, text, ScriptTarget.Latest, true);
        const lenses = [] as CodeLens[];

        function walk(node: Node) {
            let type: string;

            if (isCallExpression(node) && finds.includes(type = node.expression.getText())) {
                const args = node.arguments.map((a) => {
                    return tryParseStringLiteral(a)
                        ?? tryParseRegularExpressionLiteral(a)
                        ?? tryParseFunction(document, a);
                });

                const range = new Range(document.positionAt(node.getStart()), document.positionAt(node.getEnd()));

                lenses.push(new CodeLens(range, {
                    title: "View Module",
                    command: "equicord-companion.extractFind",
                    arguments: [
                        {
                            type: "extract",
                            data: {
                                extractType: "find",
                                findType: type as AnyFindType,
                                findArgs: args.filter((x) => x != null),
                            },
                        } satisfies Discriminate<OutgoingMessage, "extract">,
                    ],
                    tooltip: "View Module",
                }));
                lenses.push(new CodeLens(range, {
                    title: "Test Find",
                    command: "equicord-companion.testFind",
                    arguments: [
                        {
                            type,
                            args: args.filter((x) => x != null),
                        },
                    ],
                }));
            }

            node.forEachChild(walk);
        }

        walk(sourceFile);

        return lenses;
    },
};