import * as MillsFabula from "./mills_fabula.mjs";

const TokenUiSettings = Object.freeze({
    Enabled: "uiAdjustEnabled",
})

Hooks.once("setup", () => {
    game.settings.register(MillsFabula.id, TokenUiSettings.Enabled, {
        name: "MF.TokenUiAdjust.Settings.Enabled.Name",
        hint: "MF.TokenUiAdjust.Settings.Enabled.Hint",
        type: Boolean,
        config: true,
        scope: "world",
        requiresReload: true,
        default: true,
    })

    if (!game.settings.get(MillsFabula.id, TokenUiSettings.Enabled)) {
        return;
    }

    /** Padding above and below the token, percentage of a grid square. */
    const top_bot_padding = 5;

    Hooks.on("drawToken", (drawn_token) => {
        /*
         * Drawing attribute bars and nameplates are handled by private functions called
         * after the `drawToken` hook. That means that we cannot change their position in this hook.
         *
         * We could update them in the `refreshToken` hook, which works, but is called a lot more than
         * necessary and needs a view update (move the view) from the canvas to show the updates.
         *
         * Instead : we can replace the draw functions handling the bars and nameplate.
         * They are still useful, so make of copy bound to the drawn token so that we can call them
         * in our replacement function, then make the changes that we need.
         */
        let base_drawBar = drawn_token._drawBar.bind(drawn_token);
        drawn_token._drawBar = (number, bar, data) => {
            const token_height = drawn_token.getSize().height
            const padding = drawn_token.scene.grid.size * top_bot_padding/100;
            base_drawBar(number, bar, data)
            bar.position.set(0, token_height + padding + number * bar.height)
        }

        let base_refreshNameplate = drawn_token._refreshNameplate.bind(drawn_token);
        drawn_token._refreshNameplate = () => {
            const token_width = drawn_token.getSize().width;
            const padding = drawn_token.scene.grid.size * top_bot_padding/100;
            base_refreshNameplate()
            drawn_token.nameplate.position.set(token_width/2, -(padding + drawn_token.nameplate.height))
        }
    })
})