const std = @import("std");
const cbor = @import("cbor");
const tp = @import("thespian");

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

pub const Type = @import("palette.zig").Create(@This());

pub const label = "Search themes";

pub const Entry = struct {
    name: []const u8,
};

pub const Match = struct {
    name: []const u8,
    score: i32,
    matches: []const usize,
};

var previous_theme: ?[]const u8 = null;
pub fn load_entries(palette: *Type) !void {
    previous_theme = tui.current().theme.name;
    for (Widget.themes) |theme| {
        (palette.entries.addOne() catch @panic("oom")).* = .{
            .name = theme.name,
        };
    }
}

pub fn add_menu_entry(palette: *Type, entry: *Entry, matches: ?[]const usize) !void {
    var value = std.ArrayList(u8).init(palette.a);
    defer value.deinit();
    const writer = value.writer();
    try cbor.writeValue(writer, entry.name);
    try cbor.writeValue(writer, if (palette.hints) |hints| hints.get(entry.name) orelse "" else "");
    if (matches) |matches_|
        try cbor.writeValue(writer, matches_);
    try palette.menu.add_item_with_handler(value.items, select);
    palette.items += 1;
}

fn select(menu: **Type.MenuState, button: *Type.ButtonState) void {
    var name: []const u8 = undefined;
    var iter = button.opts.label;
    if (!(cbor.matchString(&iter, &name) catch false)) return;
    tp.self_pid().send(.{ "cmd", "exit_overlay_mode" }) catch |e| menu.*.opts.ctx.logger.err("theme_palette", e);
    tp.self_pid().send(.{ "cmd", "set_theme", .{name} }) catch |e| menu.*.opts.ctx.logger.err("theme_palette", e);
}

pub fn updated(palette: *Type, button_: ?*Type.ButtonState) !void {
    const button = button_ orelse return cancel(palette);
    var name: []const u8 = undefined;
    var iter = button.opts.label;
    if (!(cbor.matchString(&iter, &name) catch false)) return;
    tp.self_pid().send(.{ "cmd", "set_theme", .{name} }) catch |e| palette.logger.err("theme_palette upated", e);
}

pub fn cancel(palette: *Type) !void {
    if (previous_theme) |name| if (!std.mem.eql(u8, name, tui.current().theme.name)) {
        previous_theme = null;
        tp.self_pid().send(.{ "cmd", "set_theme", .{name} }) catch |e| palette.logger.err("theme_palette cancel", e);
    };
}