import { Ast, AstCreator, File } from "./ast.ts";
import { stmtToString } from "./ast_visitor.ts";
import { Checker } from "./checker.ts";
import { CompoundAssignDesugarer } from "./desugar/compound_assign.ts";
import { SpecialLoopDesugarer } from "./desugar/special_loop.ts";
import { Reporter } from "./info.ts";
import { Lexer } from "./lexer.ts";
import { Lowerer } from "./lowerer.ts";
import { Parser } from "./parser.ts";
import { Resolver } from "./resolver.ts";

class Compilation {
    private files: File[] = [];

    public constructor(private startFile: string) {}

    public compile(): Ast {
        throw new Error();
    }
}

const text = await Deno.readTextFile(Deno.args[0]);

const astCreator = new AstCreator();
const reporter = new Reporter();

const lexer = new Lexer(text, reporter);

const parser = new Parser(lexer, astCreator, reporter);
const ast = parser.parse();

new SpecialLoopDesugarer(astCreator).desugar(ast);

new Resolver(reporter).resolve(ast);

new CompoundAssignDesugarer(astCreator).desugar(ast);

new Checker(reporter).check(ast);

if (reporter.errorOccured()) {
    console.error("Errors occurred, stopping compilation.");
    Deno.exit(1);
}

const lowerer = new Lowerer(lexer.currentPos());
lowerer.lower(ast);
lowerer.printProgram();
const program = lowerer.finish();

await Deno.writeTextFile("out.slgbc", JSON.stringify(program));