// 处理主题样式
export function handleThemeStyle(theme) {
	const primary = normalizeHex(theme)
	const [r, g, b] = hexToRgb(primary)
	const light2 = getLightColor(primary, 0.2)
	const light3 = getLightColor(primary, 0.3)
	const light5 = getLightColor(primary, 0.5)

	document.documentElement.style.setProperty('--el-color-primary', primary)
	document.documentElement.style.setProperty('--el-color-primary-rgb', `${r}, ${g}, ${b}`)
	for (let i = 1; i <= 9; i++) {
		document.documentElement.style.setProperty(`--el-color-primary-light-${i}`, `${getLightColor(primary, i / 10)}`)
	}
	for (let i = 1; i <= 9; i++) {
		document.documentElement.style.setProperty(`--el-color-primary-dark-${i}`, `${getDarkColor(primary, i / 10)}`)
	}

	// 系统主题联动到侧边栏选中态与高亮
	document.documentElement.style.setProperty('--menu-active-bg', `linear-gradient(135deg, ${primary} 0%, ${light3} 100%)`)
	document.documentElement.style.setProperty('--menu-active-glow', `0 10px 24px rgba(${r}, ${g}, ${b}, 0.32)`)
	document.documentElement.style.setProperty('--menu-hover', `rgba(${r}, ${g}, ${b}, 0.2)`)
	document.documentElement.style.setProperty('--accent-primary', primary)
	document.documentElement.style.setProperty('--accent-light', light2)
	document.documentElement.style.setProperty('--accent-lighter', light5)
}

// hex颜色转rgb颜色
export function hexToRgb(str) {
	str = normalizeHex(str).replace('#', '')
	const hexs = str.match(/../g) || ['40', '9e', 'ff']
	for (let i = 0; i < 3; i++) {
		hexs[i] = parseInt(hexs[i], 16)
	}
	return hexs
}

// rgb颜色转hex颜色
export function rgbToHex(r, g, b) {
	const hexs = [r.toString(16), g.toString(16), b.toString(16)]
	for (let i = 0; i < 3; i++) {
		if (hexs[i].length === 1) {
			hexs[i] = `0${hexs[i]}`
		}
	}
	return `#${hexs.join('')}`
}

// 变浅颜色值
export function getLightColor(color, level) {
	const rgb = hexToRgb(color)
	for (let i = 0; i < 3; i++) {
		rgb[i] = Math.floor((255 - rgb[i]) * level + rgb[i])
	}
	return rgbToHex(rgb[0], rgb[1], rgb[2])
}

// 变深颜色值
export function getDarkColor(color, level) {
	const rgb = hexToRgb(color)
	for (let i = 0; i < 3; i++) {
		rgb[i] = Math.floor(rgb[i] * (1 - level))
	}
	return rgbToHex(rgb[0], rgb[1], rgb[2])
}

function normalizeHex(color) {
	if (!color || typeof color !== 'string') return '#409eff'
	let value = color.trim().replace('#', '')
	if (value.length === 3) {
		value = value.split('').map((s) => s + s).join('')
	}
	if (!/^[0-9a-fA-F]{6}$/.test(value)) return '#409eff'
	return `#${value.toLowerCase()}`
}