package com.peachpasswords.autofill

import android.graphics.Bitmap
import android.graphics.Canvas
import android.graphics.Paint
import android.graphics.Typeface
import android.graphics.drawable.Icon
import android.util.LruCache
import androidx.compose.ui.graphics.toArgb
import com.peachpasswords.ui.components.titleBackground
import com.peachpasswords.ui.components.titleInitials

/**
 * Monogram chip icons for inline autofill suggestions — the same initials and
 * deterministic background as the vault list (titleInitials/titleBackground),
 * rendered once per source and cached. The IME renders these outside any
 * Peach window, so they must be plain bitmaps.
 */
object ChipMonogramIcon {
    private const val SIZE_PX = 64
    private val cache = LruCache<String, Icon>(32)

    fun icon(source: String): Icon {
        cache.get(source)?.let { return it }
        val bitmap = Bitmap.createBitmap(SIZE_PX, SIZE_PX, Bitmap.Config.ARGB_8888)
        val canvas = Canvas(bitmap)
        val background = Paint(Paint.ANTI_ALIAS_FLAG).apply { color = titleBackground(source).toArgb() }
        val radius = SIZE_PX * 0.23f
        canvas.drawRoundRect(0f, 0f, SIZE_PX.toFloat(), SIZE_PX.toFloat(), radius, radius, background)
        val text = Paint(Paint.ANTI_ALIAS_FLAG).apply {
            // T0 ink at ~92%, matching the vault-list initials chip.
            color = 0xEBF0E8D8.toInt()
            textSize = SIZE_PX * 0.34f
            typeface = Typeface.MONOSPACE
            textAlign = Paint.Align.CENTER
        }
        val centerY = SIZE_PX / 2f - (text.descent() + text.ascent()) / 2f
        canvas.drawText(titleInitials(source), SIZE_PX / 2f, centerY, text)
        return Icon.createWithBitmap(bitmap).also { cache.put(source, it) }
    }
}