pub const Parser = @import("Parser.zig");
pub const VM = @import("vm.zig");
// TODO: is this really needed?
pub const Wasm = @import("wasm.zig");
pub const IR = @import("ir.zig");

pub const GlobalRuntime = Wasm.GlobalRuntime;
pub const Runtime = VM.Runtime;

const std = @import("std");

test "Fibonacci" {
    // var gpa = std.heap.GeneralPurposeAllocator(.{}){};
    // const allocator = gpa.allocator();
    const allocator = std.testing.allocator;
    var global_runtime = GlobalRuntime.init(allocator);
    defer global_runtime.deinit();

    const file = try std.fs.cwd().openFile("assets/core.wasm", .{});
    const all = try file.readToEndAlloc(allocator, 1_000_000); // 1 MB
    var parser = Parser{
        .bytes = all,
        .byte_idx = 0,
        .allocator = allocator,
    };
    const module = parser.parseModule() catch |err| {
        std.debug.print("[ERROR]: error at byte {x}(0x{x})\n", .{ parser.byte_idx, parser.bytes[parser.byte_idx] });
        return err;
    };
    var runtime = try Runtime.init(allocator, module, &global_runtime);
    defer runtime.deinit(allocator);

    var parameters = [_]usize{17};
    try runtime.callExternal(allocator, "preinit", &parameters);
    const result = runtime.stack.pop().?;
    try std.testing.expect(result.i64 == 1597);

    var parameters2 = [_]usize{1};
    try runtime.callExternal(allocator, "preinit", &parameters2);
    const result2 = runtime.stack.pop().?;
    try std.testing.expect(result2.i64 == 1);

    var parameters3 = [_]usize{5};
    try runtime.callExternal(allocator, "preinit", &parameters3);
    const result3 = runtime.stack.pop().?;
    try std.testing.expect(result3.i64 == 5);
}