package com.peachpasswords.ui.settings

import androidx.compose.animation.core.LinearEasing
import androidx.compose.animation.core.animateFloat
import androidx.compose.animation.core.rememberInfiniteTransition
import androidx.compose.animation.core.infiniteRepeatable
import androidx.compose.animation.core.tween
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.Canvas
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontStyle
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import com.peachpasswords.ui.components.PeachMark
import com.peachpasswords.ui.theme.LocalPeachAccent
import com.peachpasswords.ui.theme.LocalReduceMotion
import com.peachpasswords.ui.theme.peachColors
import com.peachpasswords.ui.theme.PeachType
import kotlinx.coroutines.delay
import kotlin.math.cos
import kotlin.math.sin

/**
 * Full-screen Pro activation celebration. Auto-dismisses after ~1800ms (calls [onDone]);
 * a tap dismisses early. Accent bloom + PeachMark + a ring of staggered sparkle dots.
 */
@Composable
fun ProCelebration(onDone: () -> Unit) {
    val accent = LocalPeachAccent.current
    val reduceMotion = LocalReduceMotion.current

    LaunchedEffect(Unit) {
        delay(1800)
        onDone()
    }

    val phase by if (reduceMotion) {
        rememberInfiniteTransition(label = "spark").animateFloat(
            0f, 0f, infiniteRepeatable(tween(1)), label = "sparkStatic",
        )
    } else {
        rememberInfiniteTransition(label = "spark").animateFloat(
            initialValue = 0f, targetValue = 1f,
            animationSpec = infiniteRepeatable(tween(1800, easing = LinearEasing)),
            label = "sparkPhase",
        )
    }

    Box(
        modifier = Modifier
            .fillMaxSize()
            .background(peachColors.Bg)
            .clickable(onClick = onDone),
        contentAlignment = Alignment.Center,
    ) {
        // Accent bloom (higher opacity than the shell).
        Canvas(Modifier.fillMaxSize()) {
            drawCircle(
                color = accent.copy(alpha = 0.18f),
                radius = size.minDimension * 0.55f,
                center = Offset(size.width / 2f, size.height * 0.42f),
            )
            // 12 sparkle dots radiating from centre, staggered fade.
            val cx = size.width / 2f
            val cy = size.height * 0.42f
            val ringR = size.minDimension * 0.34f
            for (i in 0 until 12) {
                val ang = (i / 12f) * 2f * Math.PI.toFloat()
                val local = ((phase + i / 12f) % 1f)
                val a = (1f - kotlin.math.abs(local - 0.5f) * 2f).coerceIn(0f, 1f)
                drawCircle(
                    color = accent.copy(alpha = 0.7f * a),
                    radius = 4f,
                    center = Offset(cx + cos(ang) * ringR, cy + sin(ang) * ringR),
                )
            }
        }
        Column(horizontalAlignment = Alignment.CenterHorizontally) {
            PeachMark(size = 80.dp)
            Text(
                "peach pro",
                color = accent,
                style = TextStyle(fontFamily = PeachType.Display, fontStyle = FontStyle.Italic, fontSize = 44.sp),
                textAlign = TextAlign.Center,
                modifier = Modifier.padding(top = 18.dp),
            )
            Text(
                "thank you.",
                color = peachColors.T1,
                style = TextStyle(fontFamily = PeachType.Display, fontStyle = FontStyle.Italic, fontSize = 26.sp),
                textAlign = TextAlign.Center,
                modifier = Modifier.padding(top = 6.dp),
            )
        }
    }
}