// SPDX-License-Identifier: MIT
// Copyright (c) 2021 KikooDX
// This file is part of [KBLE](https://sr.ht/~kikoodx/kble), which is
// MIT licensed. The MIT license requires this copyright notice to be
// included in all copies and substantial portions of the software.
const std = @import("std");
const expect = std.testing.expect;

const movement = @import("movement.zig");
const scaling = @import("scaling.zig");
const Vec2 = @import("vec2.zig");
const Level = @import("level.zig");

pub const ActionCat = enum {
    none, // do nothing
    movement, // move and change selection
    verb, // do stuff with selection
    scale, // change draw scaling
};

pub const Action = struct {
    category: ActionCat,
    toggle: bool = false, // bool that can be passed to actions, i.e. exclusive for movement
    // Only one of these should be set, and only one should be used.
    function_move: fn (*Vec2, u32, bool) movement.SelectionUpdate = movement.move_left,
    function_verb: fn (*Level) void = Level.action_delete,
    function_scale: fn (scaling.scale_type) scaling.scale_type = scaling.scale_reset,
};

pub const ActionsDef = .{
    .none = Action{
        .category = ActionCat.none,
    },
    // Movement.
    // Left.
    .move_left = Action{
        .toggle = true,
        .category = ActionCat.movement,
        .function_move = movement.move_left,
    },
    .move_LEFT = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_left,
    },
    // Right.
    .move_right = Action{
        .toggle = true,
        .category = ActionCat.movement,
        .function_move = movement.move_right,
    },
    .move_RIGHT = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_right,
    },
    // Up.
    .move_up = Action{
        .toggle = true,
        .category = ActionCat.movement,
        .function_move = movement.move_up,
    },
    .move_UP = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_up,
    },
    // Down.
    .move_down = Action{
        .toggle = true,
        .category = ActionCat.movement,
        .function_move = movement.move_down,
    },
    .move_DOWN = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_down,
    },
    // Up-left.
    .move_up_left = Action{
        .toggle = true,
        .category = ActionCat.movement,
        .function_move = movement.move_up_left,
    },
    .move_UP_LEFT = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_up_left,
    },
    // Up-right.
    .move_up_right = Action{
        .toggle = true,
        .category = ActionCat.movement,
        .function_move = movement.move_up_right,
    },
    .move_UP_RIGHT = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_up_right,
    },
    // Down-left.
    .move_down_left = Action{
        .toggle = true,
        .category = ActionCat.movement,
        .function_move = movement.move_down_left,
    },
    .move_DOWN_LEFT = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_up_left,
    },
    // Down-right.
    .move_down_right = Action{
        .toggle = true,
        .category = ActionCat.movement,
        .function_move = movement.move_down_right,
    },
    .move_DOWN_RIGHT = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_down_right,
    },

    // Scale.
    .scale_reset = Action{
        .category = ActionCat.scale,
        .function_scale = scaling.scale_reset,
    },
    .scale_up = Action{
        .category = ActionCat.scale,
        .function_scale = scaling.scale_up,
    },
    .scale_down = Action{
        .category = ActionCat.scale,
        .function_scale = scaling.scale_down,
    },
};