FEDEO/backend/src/utils/functions.ts

import {FastifyInstance} from "fastify";
// import { PNG } from 'pngjs'
// import { ready as zplReady } from 'zpl-renderer-js'
// import { Utils } from '@mmote/niimbluelib'
// import { createCanvas } from 'canvas'
// import bwipjs from 'bwip-js'
// import Sharp from 'sharp'
// import fs from 'fs'

import { tenants } from "../../db/schema"
import { eq } from "drizzle-orm"

export const useNextNumberRangeNumber = async (
    server: FastifyInstance,
    tenantId: number,
    numberRange: string
) => {
    // 1️⃣ Tenant laden
    const [tenant] = await server.db
        .select()
        .from(tenants)
        .where(eq(tenants.id, tenantId))

    if (!tenant) {
        throw new Error(`Tenant ${tenantId} not found`)
    }

    const numberRanges = tenant.numberRanges || {}

    if (!numberRanges[numberRange]) {
        throw new Error(`Number range '${numberRange}' not found`)
    }

    const current = numberRanges[numberRange]

    // 2️⃣ Used Number generieren
    const usedNumber =
        (current.prefix || "") +
        current.nextNumber +
        (current.suffix || "")

    // 3️⃣ nextNumber erhöhen
    const updatedRanges = {
        // @ts-ignore
        ...numberRanges,
        [numberRange]: {
            ...current,
            nextNumber: current.nextNumber + 1
        }
    }

    // 4️⃣ Tenant aktualisieren
    await server.db
        .update(tenants)
        .set({ numberRanges: updatedRanges })
        .where(eq(tenants.id, tenantId))

    return { usedNumber }
}


/*
export async function encodeBase64ToNiimbot(base64Png, printDirection = 'top') {
    // 1️⃣ PNG dekodieren
    const buffer = Buffer.from(base64Png, 'base64')
    const png = PNG.sync.read(buffer) // liefert {width, height, data: Uint8Array(RGBA)}

    const { width, height, data } = png
    console.log(width, height, data)
    const cols = printDirection === 'left' ? height : width
    const rows = printDirection === 'left' ? width : height
    const rowsData = []

    console.log(cols)

    if (cols % 8 !== 0) throw new Error('Column count must be multiple of 8')

    // 2️⃣ Zeilenweise durchgehen und Bits bilden
    for (let row = 0; row < rows; row++) {
        let isVoid = true
        let blackPixelsCount = 0
        const rowData = new Uint8Array(cols / 8)

        for (let colOct = 0; colOct < cols / 8; colOct++) {
            let pixelsOctet = 0
            for (let colBit = 0; colBit < 8; colBit++) {
                const x = printDirection === 'left' ? row : colOct * 8 + colBit
                const y = printDirection === 'left' ? height - 1 - (colOct * 8 + colBit) : row
                const idx = (y * width + x) * 4
                const lum = 0.299 * data[idx] + 0.587 * data[idx + 1] + 0.114 * data[idx + 2]
                const isBlack = lum < 128
                if (isBlack) {
                    pixelsOctet |= 1 << (7 - colBit)
                    isVoid = false
                    blackPixelsCount++
                }
            }
            rowData[colOct] = pixelsOctet
        }

        const newPart = {
            dataType: isVoid ? 'void' : 'pixels',
            rowNumber: row,
            repeat: 1,
            rowData: isVoid ? undefined : rowData,
            blackPixelsCount,
        }

        if (rowsData.length === 0) {
            rowsData.push(newPart)
        } else {
            const last = rowsData[rowsData.length - 1]
            let same = newPart.dataType === last.dataType
            if (same && newPart.dataType === 'pixels') {
                same = Utils.u8ArraysEqual(newPart.rowData, last.rowData)
            }
            if (same) last.repeat++
            else rowsData.push(newPart)
            if (row % 200 === 199) {
                rowsData.push({
                    dataType: 'check',
                    rowNumber: row,
                    repeat: 0,
                    rowData: undefined,
                    blackPixelsCount: 0,
                })
            }
        }
    }

    return { cols, rows, rowsData }
}

export async function generateLabel(context,width,height) {
    // Canvas für Hintergrund & Text
    const canvas = createCanvas(width, height)
    const ctx = canvas.getContext('2d')

    // Hintergrund weiß
    ctx.fillStyle = '#FFFFFF'
    ctx.fillRect(0, 0, width, height)

    // Überschrift
    ctx.fillStyle = '#000000'
    ctx.font = '32px Arial'
    ctx.fillText(context.text, 20, 40)

    // 3) DataMatrix
    const dataMatrixPng = await bwipjs.toBuffer({
        bcid:  'datamatrix',
        text:  context.datamatrix,
        scale: 6,
    })

    // Basisbild aus Canvas
    const base = await Sharp(canvas.toBuffer())
        .png()
        .toBuffer()

    // Alles zusammen compositen
    const final = await Sharp(base)
        .composite([
            { input: dataMatrixPng, top: 60, left: 20 },
        ])
        .png()
        .toBuffer()

    fs.writeFileSync('label.png', final)

    // Optional: Base64 zurückgeben (z.B. für API)
    const base64 = final.toString('base64')

    return base64
}*/