import { LayoutBase } from "tns-core-modules/ui/layouts/layout-base";
import { StackLayout } from "tns-core-modules/ui/layouts/stack-layout";
import { Label } from "tns-core-modules/ui/label";

const average = 3;
const noValue = "noValue";
const colors = ['red', 'green'];

export function addRemove(counts: Array<number>, parent: LayoutBase): string {
    let result = `addRemove`;
    counts.forEach((count) => {
        if (count > 10000) {
            result += setResultTime(noValue);
            return;
        }

        const lbl = new Label();
        const time = executeTest(() => {
            for (let i = 0; i < count; i++) {
                parent.addChild(lbl);
                parent.removeChild(lbl);
            }
        });

        result += setResultTime(time);
    });

    return result;
}

export function setText(counts: Array<number>, parent?: LayoutBase): string {
    let result = `setText ${parent ? 'with nativeView' : ''}`;
    counts.forEach((count) => {
        const lbl = setup(parent);
        const time = executeTest(() => {
            for (let i = 0; i < count; i++) {
                lbl.text = colors[i % 2];
            }
        });
        result += setResultTime(time);
    });

    return result;
}

export function setBackgroundColor(counts: Array<number>, parent?: LayoutBase): string {
    let result = `setBackgroundColor ${parent ? 'with nativeView' : ''}`;
    counts.forEach((count) => {
        if (parent && count > 10000) {
            result += setResultTime(noValue);
            return;
        }

        const lbl = setup(parent);
        const style = lbl.style;
        const time = executeTest(() => {
            for (let i = 0; i < count; i++) {
                style.backgroundColor = <any>colors[i % 2];
            }
        });
        result += setResultTime(time);
    });

    return result;
}

const borders = [1, 2, 3];
export function setBorderWidths(counts: Array<number>, parent?: LayoutBase): string {
    let result = `setBorderWidths ${parent ? 'with nativeView' : ''}`;
    counts.forEach((count) => {
        if (count > 10000 && parent) {
            result += setResultTime(noValue);
            return;            
        }

        const lbl = setup(parent);
        const style = lbl.style;
        const time = executeTest(() => {
            for (let i = 0; i < count; i++) {
                style.borderLeftWidth = borders[i % 3];
                style.borderTopWidth = borders[i % 3];
                style.borderRightWidth = borders[i % 3];
                style.borderBottomWidth = borders[i % 3];
            }
        });
        result += setResultTime(time);
    });

    return result;
}

export function setColor(counts: Array<number>, parent?: LayoutBase): string {
    let result = `setColor ${parent ? 'with nativeView' : ''}`;
    counts.forEach((count) => {
        const lbl = setup(parent);
        const style = lbl.style;
        const time = executeTest(() => {
            for (let i = 0; i < count; i++) {
                style.color = <any>colors[i % 2];
            }
        });
        result += setResultTime(time);
    });

    return result;
}

export function setColorWithParents(counts: Array<number>, parent: LayoutBase): string {
    let result = `setColorWithParents`;
    const style = parent.style;
    counts.forEach((count) => {
        if (count > 10000) {
            result += setResultTime(noValue);
            return;
        }

        setupParents(parent);
        const time = executeTest(() => {
            for (let i = 0; i < count; i++) {
                style.color = <any>colors[i % 2];
            }
        });
        result += setResultTime(time);
    });

    return result;
}

const fontSizes = [10, 20];
export function setFontSize(counts: Array<number>, parent?: LayoutBase): string {
    let result = `setFontSize ${parent ? 'with nativeView' : ''}`;
    counts.forEach((count) => {
        const lbl = setup(parent);
        const style = lbl.style;
        const time = executeTest(() => {
            for (let i = 0; i < count; i++) {
                style.fontSize = fontSizes[i % 2];
            }
        });
        result += setResultTime(time);
    });

    return result;
}

export function setFontSizeWithParents(counts: Array<number>, parent: LayoutBase): string {
    let result = `setFontSizeWithParents`;
    const style = parent.style;
    counts.forEach((count) => {
        if (count > 1000) {
            result += setResultTime(noValue);
            return;
        }

        setupParents(parent);
        const time = executeTest(() => {
            for (let i = 0; i < count; i++) {
                style.fontSize = fontSizes[i % 2];
            }
        });
        result += setResultTime(time);
    });

    return result;
}

export function setFontWeight(counts: Array<number>, parent?: LayoutBase): string {
    let result = `setFontWeight ${parent ? 'with nativeView' : ''}`;
    counts.forEach((count) => {
        const lbl = setup(parent);
        const style = lbl.style;
        const time = executeTest(() => {
            for (let i = 0; i < count; i++) {
                style.fontWeight = i % 2 === 0 ? 'bold' : 'normal';
            }
        });
        result += setResultTime(time);
    });

    return result;
}

export function setFontWeightWithParents(counts: Array<number>, parent: LayoutBase): string {
    let result = `setFontWeightWithParents`;
    const style = parent.style;
    counts.forEach((count) => {
        if (count > 1000) {
            result += setResultTime(noValue);
            return;
        }

        setupParents(parent);
        const time = executeTest(() => {
            for (let i = 0; i < count; i++) {
                style.fontWeight = i % 2 === 0 ? 'bold' : 'normal'
            }
        });
        result += setResultTime(time);
    });

    return result;
}

export function setBindingContext(counts: Array<number>, parent?: LayoutBase): string {
    let result = `setBindingContext ${parent ? 'with nativeView' : ''}`;
    counts.forEach((count) => {
        const lbl = setup(parent);
        const time = executeTest(() => {
            for (let i = 0; i < count; i++) {
                lbl.bindingContext = colors[i % 2];
            }
        });
        result += setResultTime(time);
    });

    return result;
}

export function setBindingContextWithParents(counts: Array<number>, parent: LayoutBase): string {
    let result = `setBindingContextWithParents`;
    counts.forEach((count) => {
        if (count > 10000) {
            result += setResultTime(noValue);
            return;
        }
        setupParents(parent);
        const time = executeTest(() => {
            for (let i = 0; i < count; i++) {
                parent.bindingContext = colors[i % 2];
            }
        });
        result += setResultTime(time);
    });

    return result;
}

export function setBindingContextWithParentsBound(counts: Array<number>, parent: LayoutBase): string {
    let result = `setBindingContextWithParentsBound`;
    counts.forEach((count) => {
        if (count > 1000) {
            result += setResultTime(noValue);
            return;
        }

        setupParents(parent, true);
        const time = executeTest(() => {
            for (let i = 0; i < count; i++) {
                parent.bindingContext = colors[i % 2];
            }
        });
        result += setResultTime(time);
    });

    return result;
}

function setupParents(parent: LayoutBase, bindToContext: boolean = false): void {
    for (let i = 0; i < 3; i++) {
        let stack = new StackLayout();
        parent.addChild(stack)
        for (let j = 0; j < 3; j++) {
            let innerStack = new StackLayout();
            stack.addChild(innerStack);
            for (let k = 0; k < 3; k++) {
                const lbl = new Label();
                if (bindToContext) {
                    lbl.bind({ sourceProperty: "$value", targetProperty: "text" });
                }

                innerStack.addChild(lbl);
            }
        }
    }
}

function setup(parent?: LayoutBase): Label {
    let lbl = new Label();
    if (parent) {
        parent.addChild(lbl);
    } else {
        (<any>lbl)._ios = (<any>lbl).nativeView = undefined;
    }

    return lbl;
}

function time(): number {
    if (global.android) {
        return (<any>global).java.lang.System.nanoTime() / 1000000;
    } else {
        return (<any>global).CACurrentMediaTime() * 1000;
    }
}

function executeTest(func: Function): string {
    let total = 0;
    for (let i = 0; i < average; i++) {
        const start = time();
        func();
        const end = time();
        const duration = end - start;
        total += duration;
    }

    const avg = total / average;
    const res = `${avg.toFixed(2)}`;
    return res;
}

function setResultTime(time: string) {
    return `\t${time}`;
}