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import type { RouterURL } from './types.ts'import util from './util.ts'
export function createRouter(base: string, pagePaths: string[], options?: { location?: { pathname: string, search?: string }, defaultLocale?: string, locales?: string[] }): RouterURL {    const loc = (options?.location || (window as any).location || { pathname: '/' })    const pathname = util.cleanPath(util.trimPrefix(loc.pathname, base))    const query = new URLSearchParams(loc.search)
    let locale = options?.defaultLocale || 'en'    let asPagePath = pathname    let pagePath = ''    let params: Record<string, string> = {}
    if (asPagePath !== '/') {        const a = asPagePath.split('/')        if (options?.locales?.includes(a[0])) {            locale = a[0]            asPagePath = '/' + a.slice(1).join('/')        }    }
    for (const routePath of pagePaths) {        const [p, ok] = matchPath(routePath, asPagePath)        if (ok) {            pagePath = routePath            params = p            break        }    }
    return { locale, pathname, pagePath, params, query }}
function matchPath(routePath: string, realPath: string): [Record<string, string>, boolean] {    const params: Record<string, string> = {}    const routeSegments = util.splitPath(routePath)    const locSegments = util.splitPath(realPath)    const depth = Math.max(routeSegments.length, locSegments.length)
    for (let i = 0; i < depth; i++) {        const routeSeg = routeSegments[i]        const locSeg = locSegments[i]
        if (locSeg === undefined || routeSeg === undefined) {            return [{}, false]        }
        if (routeSeg.startsWith('[...') && routeSeg.endsWith(']') && routeSeg.length > 5 && i === routeSegments.length - 1) {            params[routeSeg.slice(4, -1)] = locSegments.slice(i).map(decodeURIComponent).join('/')            break        }
        if (routeSeg.startsWith('[') && routeSeg.endsWith(']') && routeSeg.length > 2) {            params[routeSeg.slice(1, -1)] = decodeURIComponent(locSeg)        } else if (routeSeg.startsWith('$') && routeSeg.length > 1) {            params[routeSeg.slice(1)] = decodeURIComponent(locSeg)        } else if (routeSeg !== locSeg) {            return [{}, false]        }    }
    return [params, true]}