// 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 conf = @import("conf.zig");
const movement = @import("movement.zig");
const scaling = @import("scaling.zig");
const verbs = @import("verbs.zig");
const Vec2 = @import("vec2.zig");
const Level = @import("level.zig");
const Mode = @import("modes.zig").Mode;

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

pub const Action = struct {
    category: ActionCat,
    // Only one of these should be set, and only one should be used.
    function_move: fn (*Vec2, conf.arg_type) movement.SelectionUpdate = movement.move_left,
    function_verb: fn (*Level, conf.arg_type) void = verbs.delete,
    function_scale: fn (scaling.scale_type) scaling.scale_type = scaling.scale_reset,
    function_file: fn (*Level, *std.mem.Allocator, [*:0]const u8) void = Level.action_write,
    next_mode: Mode = Mode.normal,
};

pub const ActionsDef = .{
    .none = Action{
        .category = ActionCat.none,
    },
    // Movement.
    // Reset selection.
    .move_but_dont = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_but_dont,
    },
    // Left.
    .move_left = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_left,
    },
    // Right.
    .move_right = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_right,
    },
    // Up.
    .move_up = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_up,
    },
    // Down.
    .move_down = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_down,
    },
    // Up-left.
    .move_up_left = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_up_left,
    },
    // Up-right.
    .move_up_right = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_up_right,
    },
    // Down-left.
    .move_down_left = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_down_left,
    },
    // Down-right.
    .move_down_right = Action{
        .category = ActionCat.movement,
        .function_move = movement.move_down_right,
    },

    // Verbs.
    .verb_clear_selection = Action{
        .category = ActionCat.verb,
        .function_verb = verbs.clear_selection,
    },
    .verb_delete = Action{
        .category = ActionCat.verb,
        .function_verb = verbs.delete,
    },
    .verb_replace = Action{
        .category = ActionCat.verb,
        .function_verb = verbs.replace,
    },

    // 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,
    },

    // File
    .file_read = Action{
        .category = ActionCat.file,
        .function_file = Level.action_read,
    },
    .file_write = Action{
        .category = ActionCat.file,
        .function_file = Level.action_write,
    },

    // Mode change.
    .mode_normal = Action{
        .category = ActionCat.mode,
        .next_mode = Mode.normal,
    },
    .mode_select = Action{
        .category = ActionCat.mode,
        .next_mode = Mode.select,
    },
    .mode_rectangle = Action{
        .category = ActionCat.mode,
        .next_mode = Mode.rectangle,
    },
    .mode_camera = Action{
        .category = ActionCat.mode,
        .next_mode = Mode.camera,
    },
};