import { DefaultProps, ElementLocator, GraphicPropsBase } from '@motajs/render';
import { SetupComponentOptions } from '@motajs/system-ui';
import {
    computed,
    defineComponent,
    DefineSetupFnComponent,
    onMounted,
    Ref,
    shallowRef,
    watch
} from 'vue';

export interface IconsProps extends DefaultProps<GraphicPropsBase> {
    loc: ElementLocator;
}

const iconsProps = {
    props: ['loc']
} satisfies SetupComponentOptions<IconsProps>;

type PathGenerator = (width: number, height: number) => Path2D;
type PadFn = (
    divisor: number
) => [left: number, right: number, top: number, bottom: number];
type IconLoc = [
    x: number,
    y: number,
    w: number,
    h: number,
    cx: number,
    cy: number
];

/**
 * @param loc 图标位置信息
 * @param pad 计算图标外围填充
 */
type PathFn = (loc: IconLoc, pad: PadFn) => Path2D;

/**
 * 适配填充
 * @param x 左上角横坐标
 * @param y 左上角纵坐标
 * @param width 矩形宽度
 * @param height 矩形高度
 * @param divisor 填充除数，例如左边缘会变成 `x + width / divisor`
 */
function pad(
    x: number,
    y: number,
    width: number,
    height: number,
    divisor: number
): [left: number, right: number, top: number, bottom: number] {
    return [
        x + width / divisor, // left
        x + width - width / divisor, // right
        y + height / divisor, // top
        y + height - height / divisor // bottom
    ];
}

/**
 * 适配图标路径生成
 * @param aspect 宽高比
 * @param ref 路径响应式对象
 * @param fn 路径定义函数
 */
function adjustPath(
    aspect: number,
    ref: Ref<Path2D | undefined>,
    fn: PathFn
): PathGenerator {
    let beforeWidth = 200;
    let beforeHeight = 200;
    let path: Path2D | undefined;
    return (width, height) => {
        if (width === beforeWidth && height === beforeHeight && path) {
            return path;
        }
        beforeWidth = width;
        beforeHeight = height;
        const eleAspect = width / height;
        let ox = 0;
        let oy = 0;
        let dw = 0;
        let dh = 0;
        if (aspect >= eleAspect) {
            ox = 0;
            dw = width;
            dh = width / aspect;
            oy = (height - dh) / 2;
        } else {
            oy = 0;
            dh = height;
            dw = height * aspect;
            ox = (width - dw) / 2;
        }
        const cx = ox + dw / 2;
        const cy = oy + dh / 2;
        path = fn([ox, oy, dw, dh, cx, cy], divisor =>
            pad(ox, oy, dw, dh, divisor)
        );
        ref.value = path;
        return path;
    };
}

/**
 * 定义一个描边图标
 * @param aspect 图标的宽高比
 * @param pathDef 图标的路径定义函数
 * @param props 图标组件定义的参数配置
 */
export function defineIcon<T extends IconsProps>(
    aspect: number,
    pathDef: PathFn,
    props: SetupComponentOptions<T> = iconsProps
): DefineSetupFnComponent<T> {
    return defineComponent<T>(props => {
        const path = shallowRef<Path2D>();

        const width = computed(() => props.loc[2] ?? 200);
        const height = computed(() => props.loc[3] ?? 200);
        const generatePath = adjustPath(aspect, path, pathDef);

        watch(props, () => {
            generatePath(width.value, height.value);
        });

        onMounted(() => {
            generatePath(width.value, height.value);
        });

        return () => (
            <g-path
                loc={props.loc}
                path={path.value}
                stroke
                lineJoin="round"
                lineCap="round"
            ></g-path>
        );
    }, props);
}

export const RollbackIcon = defineIcon(1, loc => {
    const path = new Path2D();
    const [ox, oy, width, height] = loc;
    const arc = width / 10;
    const arrow = width / 10;
    const left = ox + width / 10;
    const top = oy + height / 5;
    const right = ox + width - width / 10;
    const bottom = oy + height - height / 5;
    const end = left + width / 4;
    path.moveTo(left, bottom);
    path.lineTo(right - arc, bottom);
    path.arcTo(right, bottom, right, bottom - arc, arc);
    path.lineTo(right, top + arc);
    path.arcTo(right, top, right - arc, top, arc);
    path.lineTo(end, top);
    path.moveTo(end + arrow, top - arrow);
    path.lineTo(end, top);
    path.lineTo(end + arrow, top + arrow);
    path.moveTo(left, top);
    return path;
});

export const RetweetIcon = defineIcon(1, loc => {
    const path = new Path2D();
    const [ox, oy, width, height] = loc;
    const arc = width / 10;
    const arrow = width / 10;
    const left = ox + width / 10;
    const top = oy + height / 5;
    const right = ox + width - width / 10;
    const bottom = oy + height - height / 5;
    const end = left + width / 2;
    path.moveTo(end, bottom);
    path.lineTo(left + arc, bottom);
    path.arcTo(left, bottom, left, bottom - arc, arc);
    path.lineTo(left, top + arc);
    path.arcTo(left, top, left + arc, top, arc);
    path.lineTo(right, top);
    path.moveTo(right - arrow, top - arrow);
    path.lineTo(right, top);
    path.lineTo(right - arrow, top + arrow);
    path.moveTo(left, top);
    return path;
});

export const ViewMapIcon = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const [, , , , cx, cy] = loc;
    const [left, right, top, bottom] = pad(5);
    path.rect(left, top, right - left, bottom - top);
    path.moveTo(cx, top);
    path.lineTo(cx, bottom);
    path.moveTo(left, cy);
    path.lineTo(right, cy);
    return path;
});

export const DanmakuIcon = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const [, , width, height, cx, cy] = loc;
    const [left, , , bottom] = pad(5);
    const rx = width / 3;
    const ry = height / 4;
    const start = (Math.PI * 16) / 18;
    const end = (Math.PI * 12) / 18;
    path.ellipse(cx, cy, rx, ry, 0, start, end);
    path.lineTo(left - width / 24, bottom - height / 36);
    path.closePath();
    return path;
});

export const ReplayIcon = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const [, , width, height, , cy] = loc;
    const [left, right, top, bottom] = pad(5);
    const arc = width / 10;
    path.moveTo(right, cy - height / 8);
    path.lineTo(right, top + arc);
    path.arcTo(right, top, right - arc, top, arc);
    path.lineTo(left + arc, top);
    path.arcTo(left, top, left, top + arc, arc);
    path.lineTo(left, cy);
    path.moveTo(left + arc, cy - arc);
    path.lineTo(left, cy);
    path.lineTo(left - arc, cy - arc);
    path.moveTo(left, cy + height / 8);
    path.lineTo(left, bottom - arc);
    path.arcTo(left, bottom, left + arc, bottom, arc);
    path.lineTo(right - arc, bottom);
    path.arcTo(right, bottom, right, bottom - arc, arc);
    path.lineTo(right, cy);
    path.moveTo(right - arc, cy + arc);
    path.lineTo(right, cy);
    path.lineTo(right + arc, cy + arc);
    return path;
});

export const NumpadIcon = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const [, , width, height, cx, cy] = loc;
    const [left, right, top, bottom] = pad(5);
    path.rect(left, top, right - left, bottom - top);
    const path2 = new Path2D();
    path2.ellipse(cx, cy, width / 9, height / 6, 0, 0, Math.PI * 2);
    path.addPath(path2);
    return path;
});

export const PlayIcon = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const [, oy, , height] = loc;
    const [left, right, top, bottom] = pad(5);
    path.moveTo(left, top);
    path.lineTo(right, oy + height / 2);
    path.lineTo(left, bottom);
    path.closePath();
    return path;
});

export const PauseIcon = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const [, , width, , cx] = loc;
    const [, , top, bottom] = pad(5);
    path.moveTo(cx - width / 5, top);
    path.lineTo(cx - width / 5, bottom);
    path.moveTo(cx + width / 5, top);
    path.lineTo(cx + width / 5, bottom);
    return path;
});

export const DoubleArrow = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const path2 = new Path2D();
    const [, , width, height, cx, cy] = loc;
    const [left, right, top, bottom] = pad(5);
    path.moveTo(left, top + height / 12);
    path.lineTo(cx + width / 8, cy);
    path.lineTo(left, bottom - height / 12);
    path.closePath();
    path2.moveTo(cx, top + height / 12);
    path2.lineTo(right, cy);
    path2.lineTo(cx, bottom - height / 12);
    path2.closePath();
    path.addPath(path2);
    return path;
});

export const StepForward = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const path2 = new Path2D();
    const [, oy, , height] = loc;
    const [left, right, top, bottom] = pad(5);
    path.moveTo(left, top);
    path.lineTo(right, oy + height / 2);
    path.lineTo(left, bottom);
    path.closePath();
    path2.moveTo(right, top);
    path2.lineTo(right, bottom);
    path.addPath(path2);
    return path;
});

export const SoundVolume = defineIcon(1, loc => {
    const path = new Path2D();
    const [ox, oy, width, height, cx, cy] = loc;
    const left = ox + width / 8;
    const top = oy + height / 5;
    const bottom = oy + height - height / 5;
    path.moveTo(left, height / 2 - height / 10);
    path.lineTo(left, height / 2 + height / 10);
    path.lineTo(left + width / 6, height / 2 + height / 10);
    path.lineTo(width / 2, bottom);
    path.lineTo(width / 2, top);
    path.lineTo(left + width / 6, height / 2 - height / 10);
    path.closePath();
    const start = -Math.PI / 4;
    const end = Math.PI / 4;
    path.moveTo(
        width / 2 + (Math.SQRT1_2 * width) / 6,
        height / 2 - (Math.SQRT1_2 * width) / 6
    );
    path.arc(cx, cy, width / 6, start, end);
    path.moveTo(
        width / 2 + (Math.SQRT1_2 * width) / 3,
        height / 2 - (Math.SQRT1_2 * width) / 3
    );
    path.arc(cx, cy, width / 3, start, end);
    return path;
});

export const Fullscreen = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const [, , width, height] = loc;
    const [left, right, top, bottom] = pad(4);

    // 左上
    path.moveTo(left + width / 6, top + height / 6);
    path.lineTo(left, top);
    path.moveTo(left, top + height / 8);
    path.lineTo(left, top);
    path.lineTo(left + width / 8, top);

    // 右上
    path.moveTo(right - width / 6, top + height / 6);
    path.lineTo(right, top);
    path.moveTo(right, top + height / 8);
    path.lineTo(right, top);
    path.lineTo(right - width / 8, top);

    // 左下
    path.moveTo(left + width / 6, bottom - height / 6);
    path.lineTo(left, bottom);
    path.moveTo(left, bottom - height / 8);
    path.lineTo(left, bottom);
    path.lineTo(left + width / 8, bottom);

    // 右下
    path.moveTo(right - width / 6, bottom - height / 6);
    path.lineTo(right, bottom);
    path.moveTo(right, bottom - height / 8);
    path.lineTo(right, bottom);
    path.lineTo(right - width / 8, bottom);
    return path;
});

export const ExitFullscreen = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const [, , width, height] = loc;
    const [left, right, top, bottom] = pad(4);

    // 左上
    path.moveTo(left + width / 6, top + height / 6);
    path.lineTo(left, top);
    path.moveTo(left + width / 24, top + height / 6);
    path.lineTo(left + width / 6, top + height / 6);
    path.lineTo(left + width / 6, top + height / 24);

    // 右上
    path.moveTo(right - width / 6, top + height / 6);
    path.lineTo(right, top);
    path.moveTo(right - width / 24, top + height / 6);
    path.lineTo(right - width / 6, top + height / 6);
    path.lineTo(right - width / 6, top + height / 24);

    // 左下
    path.moveTo(left + width / 6, bottom - height / 6);
    path.lineTo(left, bottom);
    path.moveTo(left + width / 24, bottom - height / 6);
    path.lineTo(left + width / 6, bottom - height / 6);
    path.lineTo(left + width / 6, bottom - height / 24);

    // 右下
    path.moveTo(right - width / 6, bottom - height / 6);
    path.lineTo(right, bottom);
    path.moveTo(right - width / 24, bottom - height / 6);
    path.lineTo(right - width / 6, bottom - height / 6);
    path.lineTo(right - width / 6, bottom - height / 24);
    return path;
});

export const ArrowLeftTailless = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const [, , width] = loc;
    const [left, right, top, bottom] = pad(4);

    path.moveTo(right, top);
    path.lineTo(left + width / 4, (top + right) / 2);
    path.lineTo(right, bottom);
    return path;
});

export const ArrowRightTailless = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const [, , width] = loc;
    const [left, right, top, bottom] = pad(4);

    path.moveTo(left, top);
    path.lineTo(right - width / 4, (top + right) / 2);
    path.lineTo(left, bottom);
    return path;
});

export const ArrowUpTailless = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const [, , , height] = loc;
    const [left, right, top, bottom] = pad(4);

    path.moveTo(left, bottom);
    path.lineTo((left + right) / 2, top + height / 4);
    path.lineTo(right, bottom);
    return path;
});

export const ArrowDownTailless = defineIcon(1, (loc, pad) => {
    const path = new Path2D();
    const [, , , height] = loc;
    const [left, right, top, bottom] = pad(4);

    path.moveTo(left, top);
    path.lineTo((left + right) / 2, bottom - height / 4);
    path.lineTo(right, top);
    return path;
});