package soy.iko.opencode.ui.theme

import android.app.Activity
import android.content.Context
import android.content.ContextWrapper
import android.os.Build
import androidx.compose.foundation.isSystemInDarkTheme
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.darkColorScheme
import androidx.compose.material3.dynamicDarkColorScheme
import androidx.compose.material3.dynamicLightColorScheme
import androidx.compose.material3.lightColorScheme
import androidx.compose.runtime.Composable
import androidx.compose.runtime.SideEffect
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.platform.LocalView
import androidx.core.view.WindowCompat

/**
 * Tokyo Night — a dark, muted blue/purple palette. Every Material 3 color role is set
 * explicitly (not just primary/secondary/tertiary) so components that read `error`,
 * `primaryContainer`, `surfaceVariant`, `outline`, etc. match the brand instead of
 * falling back to stock M3 defaults that clash with it.
 *
 * Source palette (Tokyo Night):
 *   bg      #1A1B26   fg      #C0CAF5   blue    #7AA2F7   cyan    #7DCFFF
 *   green   #9ECE6A   magenta #BB9AF7   red     #F7768E   yellow  #E0AF68
 *   comment #565F89   gutter  #414868
 */
private val DarkColors = darkColorScheme(
    primary = Color(0xFF7AA2F7),
    onPrimary = Color(0xFF112036),
    primaryContainer = Color(0xFF2A3A5C),
    onPrimaryContainer = Color(0xFFD6E2FF),
    secondary = Color(0xFF9ECE6A),
    onSecondary = Color(0xFF13260A),
    secondaryContainer = Color(0xFF2B3B1F),
    onSecondaryContainer = Color(0xFFD2F0A0),
    tertiary = Color(0xFFBB9AF7),
    onTertiary = Color(0xFF221036),
    tertiaryContainer = Color(0xFF3A2A55),
    onTertiaryContainer = Color(0xFFE6D6FF),
    error = Color(0xFFF7768E),
    onError = Color(0xFF370610),
    errorContainer = Color(0xFF5C1A24),
    onErrorContainer = Color(0xFFFFD9DE),
    background = Color(0xFF1A1B26),
    onBackground = Color(0xFFC0CAF5),
    surface = Color(0xFF1F2335),
    onSurface = Color(0xFFC0CAF5),
    surfaceVariant = Color(0xFF2D3247),
    onSurfaceVariant = Color(0xFF9AA5CE),
    surfaceTint = Color(0xFF7AA2F7),
    inverseSurface = Color(0xFFC0CAF5),
    inverseOnSurface = Color(0xFF1A1B26),
    outline = Color(0xFF565F89),
    outlineVariant = Color(0xFF414868),
    scrim = Color(0xFF000000),
)

/**
 * Tokyo Night Light — the day-mode counterpart. Pairs the same hue family with a soft
 * off-white background so the brand identity survives a light setting instead of
 * snapping to stock M3 purple-grey.
 */
private val LightColors = lightColorScheme(
    primary = Color(0xFF34548A),
    onPrimary = Color(0xFFFFFFFF),
    primaryContainer = Color(0xFFD6E2FF),
    onPrimaryContainer = Color(0xFF001A41),
    secondary = Color(0xFF485E30),
    onSecondary = Color(0xFFFFFFFF),
    secondaryContainer = Color(0xFFC8F0A0),
    onSecondaryContainer = Color(0xFF0E2000),
    tertiary = Color(0xFF5A4A78),
    onTertiary = Color(0xFFFFFFFF),
    tertiaryContainer = Color(0xFFE6D6FF),
    onTertiaryContainer = Color(0xFF180038),
    error = Color(0xFF9B1C2E),
    onError = Color(0xFFFFFFFF),
    errorContainer = Color(0xFFFFD9DE),
    onErrorContainer = Color(0xFF410008),
    background = Color(0xFFF6F7FB),
    onBackground = Color(0xFF1A1B26),
    surface = Color(0xFFF1F3FA),
    onSurface = Color(0xFF1A1B26),
    surfaceVariant = Color(0xFFE0E4F0),
    onSurfaceVariant = Color(0xFF444B6E),
    surfaceTint = Color(0xFF34548A),
    inverseSurface = Color(0xFF2D3247),
    inverseOnSurface = Color(0xFFEEF0FB),
    outline = Color(0xFF747DAA),
    outlineVariant = Color(0xFFC3C8DA),
    scrim = Color(0xFF000000),
)

@Composable
fun OpencodeTheme(
    darkTheme: Boolean = isSystemInDarkTheme(),
    dynamicColor: Boolean = false,
    content: @Composable () -> Unit,
) {
    val context = LocalContext.current
    val colorScheme = when {
        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S ->
            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
        darkTheme -> DarkColors
        else -> LightColors
    }
    val view = LocalView.current
    if (!view.isInEditMode) {
        SideEffect {
            val window = view.context.findActivity()?.window ?: return@SideEffect
            WindowCompat.getInsetsController(window, view).isAppearanceLightStatusBars = !darkTheme
        }
    }
    MaterialTheme(
        colorScheme = colorScheme,
        typography = OpencodeTypography,
        shapes = OpencodeShapes,
        content = content,
    )
}

/**
 * Preview swatches for the Tokyo Night palettes, exposed so the Settings theme picker
 * can show color dots without reaching into the (otherwise private) full color schemes.
 * Each list is [primary, secondary, tertiary, background].
 */
val DarkPaletteSwatches: List<Color> = listOf(
    DarkColors.primary,
    DarkColors.secondary,
    DarkColors.tertiary,
    DarkColors.background,
)
val LightPaletteSwatches: List<Color> = listOf(
    LightColors.primary,
    LightColors.secondary,
    LightColors.tertiary,
    LightColors.background,
)

private tailrec fun Context.findActivity(): Activity? = when (this) {
    is Activity -> this
    is ContextWrapper -> baseContext.findActivity()
    else -> null
}