const std = @import("std");
const EventHandler = @import("EventHandler");
const Plane = @import("renderer").Plane;
const log = @import("log");

const Widget = @import("../Widget.zig");

const widgets = std.static_string_map.StaticStringMap(CreateFunction).initComptime(.{
    .{ "mode", @import("modestate.zig").create },
    .{ "file", @import("filestate.zig").create },
    .{ "log", @import("minilog.zig").create },
    .{ "selection", @import("selectionstate.zig").create },
    .{ "diagnostics", @import("diagstate.zig").create },
    .{ "linenumber", @import("linenumstate.zig").create },
    .{ "modifiers", @import("modstate.zig").create },
    .{ "keystate", @import("keystate.zig").create },
    .{ "expander", @import("blank.zig").Create(.dynamic) },
    .{ "spacer", @import("blank.zig").Create(.{ .static = 1 }) },
    .{ "clock", @import("clock.zig").create },
    .{ "keybind", @import("keybindstate.zig").create },
    .{ "tabs", @import("tabs.zig").create },
});
pub const CreateError = error{ OutOfMemory, WidgetInitFailed };
pub const CreateFunction = *const fn (allocator: std.mem.Allocator, parent: Plane, event_handler: ?EventHandler, arg: ?[]const u8) CreateError!Widget;

pub fn create(descriptor: []const u8, allocator: std.mem.Allocator, parent: Plane, event_handler: ?EventHandler) CreateError!?Widget {
    var it = std.mem.splitScalar(u8, descriptor, ':');
    const name = it.next() orelse {
        const logger = log.logger("statusbar");
        logger.print_err("config", "bad widget descriptor \"{s}\" (see log)", .{descriptor});
        return null;
    };
    const arg = it.next();

    const create_ = widgets.get(name) orelse {
        const logger = log.logger("statusbar");
        logger.print_err("config", "unknown widget \"{s}\" (see log)", .{name});
        log_widgets(logger);
        return null;
    };
    return try create_(allocator, parent, event_handler, arg);
}

fn log_widgets(logger: anytype) void {
    logger.print("available widgets:", .{});
    for (widgets.keys()) |name|
        logger.print("    {s}", .{name});
}