package sh.sar.basedbank

import android.content.Intent
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import sh.sar.basedbank.ui.home.HomeActivity
import sh.sar.basedbank.ui.login.LoginActivity
import sh.sar.basedbank.ui.onboarding.OnboardingActivity
import sh.sar.basedbank.util.CredentialStore
import sh.sar.basedbank.BasedBankApp
import sh.sar.basedbank.R

class MainActivity : AppCompatActivity() {

    private fun decodeQrFromSharedImage(uri: android.net.Uri): String? {
        return try {
            val bitmap = contentResolver.openInputStream(uri)?.use {
                android.graphics.BitmapFactory.decodeStream(it)
            } ?: return null
            val opts = de.markusfisch.android.zxingcpp.ZxingCpp.ReaderOptions(
                tryHarder = true, tryRotate = true, tryInvert = true,
                tryDownscale = true, maxNumberOfSymbols = 1,
                textMode = de.markusfisch.android.zxingcpp.ZxingCpp.TextMode.PLAIN
            )
            val result = (de.markusfisch.android.zxingcpp.ZxingCpp.readBitmap(
                bitmap, 0, 0, bitmap.width, bitmap.height, 0,
                opts.apply { binarizer = de.markusfisch.android.zxingcpp.ZxingCpp.Binarizer.LOCAL_AVERAGE }
            ) ?: de.markusfisch.android.zxingcpp.ZxingCpp.readBitmap(
                bitmap, 0, 0, bitmap.width, bitmap.height, 0,
                opts.apply { binarizer = de.markusfisch.android.zxingcpp.ZxingCpp.Binarizer.GLOBAL_HISTOGRAM }
            ))?.firstOrNull()?.text
            bitmap.recycle()
            result
        } catch (_: Exception) { null }
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val prefs = getSharedPreferences("prefs", MODE_PRIVATE)
        val onboardingDone = prefs.getBoolean("onboarding_done", false)
        val securitySet = prefs.getString("security_method", null) != null
        val store = CredentialStore(this)
        val hasCredentials = store.hasMibCredentials() || store.hasBmlCredentials() ||
            store.hasFahipayCredentials() || store.hasMfaisaCredentials()

        // Image shared via "Scan to Pay" — decode QR here while we still hold the URI permission
        val shareQrText: String? = if (intent?.action == Intent.ACTION_SEND &&
            intent.type?.startsWith("image/") == true) {
            val uri: android.net.Uri? =
                if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.TIRAMISU)
                    intent.getParcelableExtra(Intent.EXTRA_STREAM, android.net.Uri::class.java)
                else
                    @Suppress("DEPRECATION") intent.getParcelableExtra(Intent.EXTRA_STREAM)
            if (uri != null) decodeQrFromSharedImage(uri) else null
        } else null

        val navDestination = when (intent?.action) {
            "sh.sar.basedbank.OPEN_TRANSFER"      -> R.id.nav_transfer
            "sh.sar.basedbank.OPEN_SCAN_QR"       -> R.id.nav_transfer
            "sh.sar.basedbank.OPEN_PAY_WITH_CARD" -> R.id.nav_pay_with_card
            "sh.sar.basedbank.TAP_TO_PAY"         -> R.id.nav_pay_with_card
            else -> -1
        }
        val autoScan = intent?.action == "sh.sar.basedbank.OPEN_SCAN_QR"
        val autoTapMode = intent?.action == "sh.sar.basedbank.TAP_TO_PAY"

        val target = when {
            !onboardingDone -> OnboardingActivity::class.java
            !hasCredentials -> LoginActivity::class.java
            securitySet -> LockActivity::class.java  // proceed() → HomeActivity
            else -> HomeActivity::class.java
        }
        // No lock screen configured — mark as unlocked so HomeActivity's guard passes
        if (target == HomeActivity::class.java) {
            (application as BasedBankApp).isUnlocked = true
        }

        startActivity(Intent(this, target).apply {
            if (navDestination != -1) putExtra("nav_destination", navDestination)
            if (autoScan) putExtra("auto_scan", true)
            if (autoTapMode) putExtra("auto_tap_mode", true)
            if (shareQrText != null) putExtra("share_qr_text", shareQrText)
        })
        finish()
    }
}