package com.peachpasswords.ui.theme

import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.darkColorScheme
import androidx.compose.material3.lightColorScheme
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.compositionLocalOf
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontStyle
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.sp

/** Current accent color, available to any composable under [PeachTheme]. */
val LocalPeachAccent = compositionLocalOf { DEFAULT_ACCENT }

/** When true, decorative/long-running animations should be skipped or shortened. */
val LocalReduceMotion = staticCompositionLocalOf { false }

/** True when the active scheme is dark — some surfaces tune themselves off this. */
val LocalPeachDark = staticCompositionLocalOf { true }

@Composable
fun PeachTheme(
    darkTheme: Boolean = true,
    accent: Color = DEFAULT_ACCENT,
    reduceMotion: Boolean = false,
    content: @Composable () -> Unit,
) {
    val colors = if (darkTheme) {
        darkColorScheme(
            primary = accent,
            onPrimary = PeachColors.Bg,
            secondary = PeachColors.SyncBusy,
            onSecondary = PeachColors.Bg,
            background = PeachColors.Bg,
            onBackground = PeachColors.T0,
            surface = PeachColors.S1,
            onSurface = PeachColors.T0,
            surfaceVariant = PeachColors.S2,
            onSurfaceVariant = PeachColors.T1,
            outline = PeachColors.T3,
            error = PeachColors.Breach,
            onError = PeachColors.Bg,
        )
    } else {
        lightColorScheme(
            primary = accent,
            onPrimary = PeachColorsLight.Bg,
            secondary = PeachColorsLight.TextLink,
            onSecondary = PeachColorsLight.Bg,
            background = PeachColorsLight.Bg,
            onBackground = PeachColorsLight.T0,
            surface = PeachColorsLight.S1,
            onSurface = PeachColorsLight.T0,
            surfaceVariant = PeachColorsLight.S2,
            onSurfaceVariant = PeachColorsLight.T1,
            outline = PeachColorsLight.BorderSubtle,
            error = PeachColorsLight.BreachText,
            onError = PeachColorsLight.Bg,
        )
    }

    val typography = androidx.compose.material3.Typography(
        bodyLarge = TextStyle(
            fontFamily = PeachType.Body,
            fontSize = 16.sp,
            fontWeight = FontWeight.Normal,
        ),
        titleLarge = TextStyle(
            fontFamily = PeachType.Display,
            fontSize = 24.sp,
            fontStyle = FontStyle.Italic,
            fontWeight = FontWeight.Light,
        ),
        labelLarge = TextStyle(
            fontFamily = PeachType.Body,
            fontSize = 12.sp,
            fontWeight = FontWeight.Medium,
        ),
    )

    val palette = if (darkTheme) peachDark(accent) else peachLight(accent)

    CompositionLocalProvider(
        LocalPeachAccent provides accent,
        LocalReduceMotion provides reduceMotion,
        LocalPeachDark provides darkTheme,
        LocalPeachColors provides palette,
    ) {
        MaterialTheme(colorScheme = colors, typography = typography, content = content)
    }
}