/**
 * 两个颜色混合
 */
export function mix(color1: string, color2: string, weight: number): string {
    color1 = color1.replace(/#/g, '')
    color2 = color2.replace(/#/g, '')
    weight = typeof weight !== 'undefined' ? weight : 50
    let color = '#'

    for (let i = 0; i <= 5; i += 2) {
        const v1 = parseInt(color1.substring(i, i + 2), 16)
        const v2 = parseInt(color2.substring(i, i + 2), 16)
        let val = Math.round(v2 + (v1 - v2) * (weight / 100.0)).toString(16)
        if (val.length < 2) {
            val = '0' + val
        }
        color += val
    }

    return color
}

/**
 * 获取基于某个颜色的变亮、变暗颜色列表
 */
export function colorCluster(color: string, white: string, black: string): string[] {
    const clusters = [color]
    for (let i = 1; i <= 9; i++) {
        clusters.push(mix(white, color, i * 10))
    }
    for (let i = 1; i <= 9; i++) {
        clusters.push(mix(black, color, i * 10))
    }
    return clusters
}