import { get } from "svelte/store"
import { apiBaseURL } from "../config"
import { apiBaseOverride } from "./store"

function isAbsoluteUrl(url: string | undefined): boolean {
    return !!url && (/^(?:https?:)?\/\//.test(url) || url.startsWith("data:") || url.startsWith("blob:"))
}

function normalizeBase(base: string | null | undefined): string | null {
    return base ? base.replace(/\/+$/, "") + "/" : null
}

export function resolveApiAssetUrl(
    url: string | null | undefined,
    apiBase: string | null | undefined = get(apiBaseOverride) || apiBaseURL
): string | null | undefined {
    if (!url || isAbsoluteUrl(url) || !url.startsWith("/assets/")) {
        return url
    }

    const normalizedApiBase = normalizeBase(apiBase)

    if (!normalizedApiBase) {
        return url
    }

    return normalizedApiBase + "_/assets/" + url.replace(/^\/+/, "")
}

export function debounce<T extends (...args: never[]) => void>(
    func: T,
    wait: number
): (...args: Parameters<T>) => void {
    let timeout: ReturnType<typeof setTimeout> | null = null

    return (...args: Parameters<T>) => {
        if (timeout) {
            clearTimeout(timeout)
        }
        timeout = setTimeout(() => func(...args), wait)
    }
}

export function formatNumber(number: number, decimals = 2): string {
    return number.toFixed(decimals)
}

export function formatCurrency(amount: number, currency = "EUR", locale = "de-DE"): string {
    // goja (tibi-server SSR runtime) does not provide Intl
    if (typeof Intl === "undefined") {
        const fixed = amount.toFixed(2).replace(".", ",")
        return `${fixed}\u00A0${currency === "EUR" ? "€" : currency}`
    }
    return new Intl.NumberFormat(locale, {
        style: "currency",
        currency: currency,
    }).format(amount)
}

export function generateMockImage(seed: string): string {
    // Generate a consistent color based on the seed
    const colors = [
        "bg-red-200",
        "bg-blue-200",
        "bg-green-200",
        "bg-yellow-200",
        "bg-purple-200",
        "bg-pink-200",
        "bg-indigo-200",
        "bg-teal-200",
    ]

    const colorIndex = seed.split("").reduce((acc, char) => acc + char.charCodeAt(0), 0) % colors.length
    return colors[colorIndex]
}

export function highlightSearchTerm(text: string, searchTerm: string): string {
    if (!searchTerm.trim()) return text

    const regex = new RegExp(`(${searchTerm})`, "gi")
    return text.replace(regex, '<mark class="bg-yellow-200">$1</mark>')
}

export function slugify(value: string): string {
    return value
        .normalize("NFD")
        .replace(/[\u0300-\u036f]/g, "")
        .toLowerCase()
        .replace(/[^a-z0-9]+/g, "-")
        .replace(/(^-|-$)/g, "")
}