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const std = @import("std");
const spoon = @import("spoon");
const game = @import("game.zig");
var term: spoon.Term = undefined;
var done: bool = false;
//----- Game State -----------------------------------------------------------
var gs: game.Game = undefined;
//----- Main -----------------------------------------------------------------
pub fn main() !void {
try term.init();
defer term.deinit();
std.os.sigaction(std.os.SIG.WINCH, &std.os.Sigaction{
.handler = .{ .handler = handleSigWinch },
.mask = std.os.empty_sigset,
.flags = 0,
}, null);
var fds: [1]std.os.pollfd = undefined;
fds[0] = .{
.fd = term.tty.handle,
.events = std.os.POLL.IN,
.revents = undefined,
};
try term.uncook(.{});
defer term.cook() catch {};
try term.fetchSize();
try term.setWindowTitle("Grenade Brothers", .{});
gs.reset(.left);
try renderAll();
var buf: [16]u8 = undefined;
while (!done) {
// TODO We need to measure how long it took before a key was hit so that we can adjust the timeout on the next loop
// otherwise we will get inconsistent ticks for movement steps
const timeout = try std.os.poll(&fds, @floatToInt(u64, 1000 / 60.0));
if (timeout > 0) { // if timeout if not 0 then some fds we are polling have events for us
const read = try term.readInput(&buf);
var it = spoon.inputParser(buf[0..read]);
while (it.next()) |in| {
if (in.eqlDescription("escape") or in.eqlDescription("q")) {
done = true;
break;
} else if (in.eqlDescription("arrow-left") or in.eqlDescription("a")) {
gs.moveLeft();
} else if (in.eqlDescription("arrow-right") or in.eqlDescription("d")) {
gs.moveRight();
}
}
} else {
gs.step();
}
try renderAll();
}
}
fn renderAll() !void {
var rc = try term.getRenderContext();
defer rc.done() catch {};
try rc.clear();
if (term.width < 80 or term.width < 24) {
try rc.setAttribute(.{ .fg = .red, .bold = true });
try rc.writeAllWrapping("Terminal too small!");
return;
}
try gs.draw(&rc);
}
fn handleSigWinch(_: c_int) callconv(.C) void {
term.fetchSize() catch {};
renderAll() catch {};
}
/// Custom panic handler, so that we can try to cook the terminal on a crash,
/// as otherwise all messages will be mangled.
pub fn panic(msg: []const u8, trace: ?*std.builtin.StackTrace) noreturn {
@setCold(true);
term.cook() catch {};
std.builtin.default_panic(msg, trace);
}
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