DroidDeck/app/src/main/java/com/droiddeck/launcher/ui/GlassesPanel.kt

package com.droiddeck.launcher.ui

import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.displayCutout
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.offset
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material3.Icon
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.draw.clip
import androidx.compose.ui.platform.testTag
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.unit.IntOffset
import androidx.compose.ui.unit.sp
import androidx.compose.runtime.getValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.SolidColor
import androidx.compose.ui.graphics.StrokeCap
import androidx.compose.ui.graphics.StrokeJoin
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.graphics.vector.path
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.unit.dp
import androidx.compose.runtime.collectAsState
import com.droiddeck.launcher.R
import com.droiddeck.launcher.glasses.Glasses
import com.droiddeck.launcher.glasses.GlassesSettings
import com.droiddeck.launcher.glasses.GlassesState
import java.util.Locale

internal val GlassesIcon: ImageVector by lazy {
    ImageVector.Builder("Glasses", 24.dp, 24.dp, 24f, 24f).apply {
        path(fill = null, stroke = SolidColor(Color.Black), strokeLineWidth = 1.8f, strokeLineCap = StrokeCap.Round, strokeLineJoin = StrokeJoin.Round) {
            moveTo(2.5f, 10f); lineTo(21.5f, 10f)
            moveTo(3.2f, 10f); lineTo(3.8f, 15.2f); quadTo(4f, 17f, 6f, 17f); lineTo(8.6f, 17f); quadTo(10.2f, 17f, 10.6f, 15.4f); lineTo(11.2f, 12.6f)
            quadTo(12f, 11.6f, 12.8f, 12.6f); lineTo(13.4f, 15.4f); quadTo(13.8f, 17f, 15.4f, 17f); lineTo(18f, 17f); quadTo(20f, 17f, 20.2f, 15.2f); lineTo(20.8f, 10f)
            moveTo(2.5f, 10f); lineTo(1.8f, 7.6f)
            moveTo(21.5f, 10f); lineTo(22.2f, 7.6f)
        }
    }.build()
}

@Composable
internal fun rememberGlasses(): Pair<GlassesState, GlassesSettings> {
    val g by Glasses.state.collectAsState()
    val s by Glasses.settings.collectAsState()
    return g to s
}

internal object GlassesTab {
    const val DISPLAY = "display"
    const val HARDWARE = "hardware"
    const val TRACKING = "tracking"
}

@Composable
internal fun glassesTabs(g: GlassesState): List<Pair<String, String>> =
    listOf(GlassesTab.DISPLAY to stringResource(R.string.glasses_display)) +
        (if (g.canControl) listOf(GlassesTab.HARDWARE to stringResource(R.string.glasses_hardware), GlassesTab.TRACKING to stringResource(R.string.glasses_tracking)) else emptyList())

@Composable
internal fun GlassesGroups(
    host: MenuHost,
    g: GlassesState,
    s: GlassesSettings,
    track: (String) -> Modifier = { Modifier },
    onRecenter: (() -> Unit)? = null,
    inSession: Boolean = true,
    tab: String? = null,
    steamVr: @Composable () -> Unit = {},
) {
    val display = tab == null || tab == GlassesTab.DISPLAY
    if (display) SettingsGroup(g.model) {
        val status = if (g.hasDisplay) stringResource(R.string.glasses_status, g.width, g.height, kotlin.math.round(g.hz).toInt(),
            stringResource(if (g.sbs) R.string.glasses_mode_3d else R.string.glasses_mode_2d)) else null
        when {
            g.noSignal -> SettingsRow(stringResource(R.string.glasses_output), stringResource(R.string.glasses_no_signal)) {}
            !g.controllable && g.present && g.permission == Glasses.Permission.NONE && !g.connected ->
                SettingsRow(stringResource(R.string.glasses_control), status ?: stringResource(R.string.glasses_no_control)) {}
            g.permission == Glasses.Permission.ASKING ->
                SettingsRow(stringResource(R.string.glasses_control), stringResource(R.string.glasses_asking)) {}
            !g.connected && g.controllable -> ActionRow(stringResource(R.string.glasses_control),
                stringResource(if (g.permission == Glasses.Permission.DENIED) R.string.glasses_denied else R.string.glasses_allow_hint),
                stringResource(R.string.glasses_allow), { Glasses.requestControl() })
            status != null -> SettingsRow(stringResource(R.string.glasses_output), status) {}
        }
        ToggleRow(host, "glasses-game", stringResource(R.string.glasses_game_on), stringResource(R.string.glasses_game_on_hint),
            s.gameOnGlasses, chipModifier = track("glasses-game")) { Glasses.setGameOnGlasses(it) }
    }
    if (display && g.canControl) SettingsGroup(stringResource(R.string.glasses_display)) {
        ChoiceRow(host, "glasses-hz", stringResource(R.string.glasses_refresh), null,
            listOf(60, 90, 120).map { it to "$it Hz" }, s.refreshHz, chipModifier = track("glasses-hz")) { Glasses.setRefreshHz(it) }
        if (g.sbsSupport == GlassesState.SBS_FAILS && !g.sbs) {
            SettingsRow(stringResource(R.string.glasses_3d), stringResource(R.string.glasses_3d_unsupported)) {}
        } else {
            if (inSession || g.sbs) ToggleRow(host, "glasses-3d", stringResource(R.string.glasses_3d), stringResource(R.string.glasses_3d_hint),
                g.sbs, chipModifier = track("glasses-3d")) { Glasses.set3d(it) }
            if (g.sbs90) ChoiceRow(host, "glasses-3d-hz", stringResource(R.string.glasses_3d_refresh), null,
                listOf(60, 90).map { it to "$it Hz" }, s.sbsHz, chipModifier = track("glasses-3d-hz")) { Glasses.setSbsHz(it) }
            ToggleRow(host, "glasses-auto3d", stringResource(R.string.glasses_auto3d), stringResource(R.string.glasses_auto3d_hint),
                s.auto3d, chipModifier = track("glasses-auto3d")) { Glasses.setAuto3d(it) }
        }
        ChoiceRow(host, "glasses-picture", stringResource(R.string.glasses_picture), stringResource(R.string.glasses_picture_hint),
            listOf(
                GlassesSettings.PICTURE_AUTO to stringResource(R.string.glasses_picture_auto),
                GlassesSettings.PICTURE_SCREEN to stringResource(R.string.glasses_picture_screen),
                GlassesSettings.PICTURE_SBS to stringResource(R.string.glasses_picture_sbs),
            ), s.picture3d, chipModifier = track("glasses-picture"), hintLines = 2) { Glasses.setPicture3d(it) }
        if (s.picture3d != GlassesSettings.PICTURE_SBS) {
            SliderRow(stringResource(R.string.glasses_screen_size), null, s.screenWidthDm, 5..60, step = 1,
                format = { String.format(Locale.US, "%.1f m", it / 10f) }, modifier = track("glasses-width")) { Glasses.setScreenWidthDm(it) }
            SliderRow(stringResource(R.string.glasses_screen_distance), null, s.screenDistanceDm, 5..100, step = 1,
                format = { String.format(Locale.US, "%.1f m", it / 10f) }, modifier = track("glasses-distance")) { Glasses.setScreenDistanceDm(it) }
        }
        steamVr()
        SliderRow(stringResource(R.string.glasses_vr_fov), stringResource(R.string.glasses_vr_fov_hint), s.vrFovDeg,
            GlassesSettings.VR_FOV_MIN..GlassesSettings.VR_FOV_MAX, step = 1,
            format = { "$it°" }, modifier = track("glasses-vr-fov")) { Glasses.setVrFovDeg(it) }
    }
    if ((tab == null || tab == GlassesTab.HARDWARE) && g.canControl) SettingsGroup(stringResource(R.string.glasses_hardware)) {
        SliderRow(stringResource(R.string.glasses_brightness), null, g.brightness.coerceAtLeast(0), 0..g.brightnessMax, step = 1,
            modifier = track("glasses-brightness")) { Glasses.setBrightness(it) }
        SliderRow(stringResource(R.string.glasses_volume), null, g.volume.coerceAtLeast(0), 0..g.volumeMax, step = 1,
            modifier = track("glasses-volume")) { Glasses.setVolume(it) }
        ToggleRow(host, "glasses-sunblock", stringResource(R.string.glasses_sunblock), stringResource(R.string.glasses_sunblock_hint),
            g.sunblock, chipModifier = track("glasses-sunblock")) { Glasses.setSunblock(it) }
    }
    if ((tab == null || tab == GlassesTab.TRACKING) && g.canControl) SettingsGroup(stringResource(R.string.glasses_tracking)) {
        ToggleRow(host, "glasses-tracking", stringResource(R.string.glasses_head_tracking), stringResource(R.string.glasses_head_tracking_hint),
            s.headTracking, chipModifier = track("glasses-tracking")) { Glasses.setHeadTracking(it) }
        if (onRecenter != null && s.headTracking) ActionRow(stringResource(R.string.glasses_recenter), null,
            stringResource(R.string.cardboard_recenter_button), onRecenter)
    }
}

private fun padButtonColors(tint: Int, opacity: Int, pressed: Boolean): Pair<Color, Color> {
    val base = Color(tint)
    val alpha = opacity.coerceIn(0, 100) / 100f
    fun light(a: Int, f: Float) = Color(base.red + (1 - base.red) * f, base.green + (1 - base.green) * f, base.blue + (1 - base.blue) * f, a * alpha / 255f)
    return Color(base.red * 0.12f, base.green * 0.12f, base.blue * 0.12f, 190 / 255f) to (if (pressed) light(230, 0.7f) else light(150, 0.25f))
}

@Composable
internal fun GlassesCornerButton(slot: Int, tint: Int, opacity: Int, onClick: () -> Unit) {
    val density = androidx.compose.ui.platform.LocalDensity.current
    androidx.compose.foundation.layout.BoxWithConstraints(
        Modifier.fillMaxSize().windowInsetsPadding(WindowInsets.displayCutout),
    ) {
        val x = if (slot < 0) maxWidth / 2 + 56.dp else 34.dp + 56.dp * slot
        val bottom = if (slot < 0) 44.dp else 34.dp
        val source = remember { MutableInteractionSource() }
        val pressed by source.collectIsPressedAsState()
        val (fill, line) = padButtonColors(tint, opacity, pressed)
        Box(
            contentAlignment = Alignment.Center,
            modifier = Modifier
                .offset { with(density) { IntOffset((x - 18.dp).roundToPx(), (maxHeight - bottom - 18.dp).roundToPx()) } }
                .size(36.dp)
                .clip(CircleShape)
                .background(fill)
                .border(1.5.dp, line, CircleShape)
                .clickable(interactionSource = source, indication = null, role = Role.Button, onClick = onClick)
                .testTag("glasses-button"),
        ) {
            Icon(GlassesIcon, stringResource(R.string.glasses_open), tint = line, modifier = Modifier.size(22.dp))
        }
    }
}

@Composable
internal fun GlassesRecenterButton(tint: Int, opacity: Int, onClick: () -> Unit) {
    val source = remember { MutableInteractionSource() }
    val pressed by source.collectIsPressedAsState()
    val (fill, line) = padButtonColors(tint, opacity, pressed)
    val shape = RoundedCornerShape(50)
    Box(
        Modifier.fillMaxSize().windowInsetsPadding(WindowInsets.displayCutout).padding(top = 12.dp),
        contentAlignment = Alignment.TopCenter,
    ) {
        Box(
            contentAlignment = Alignment.Center,
            modifier = Modifier
                .height(36.dp)
                .clip(shape)
                .background(fill)
                .border(1.5.dp, line, shape)
                .clickable(interactionSource = source, indication = null, role = Role.Button, onClick = onClick)
                .padding(horizontal = 18.dp)
                .testTag("glasses-recenter"),
        ) {
            Text(stringResource(R.string.glasses_recenter_button), color = line, fontSize = 14.sp)
        }
    }
}

@Composable
internal fun GlassesPlayingHint(model: String) {
    Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
        Column(horizontalAlignment = Alignment.CenterHorizontally) {
            Icon(GlassesIcon, null, tint = Color.White.copy(alpha = 0.35f), modifier = Modifier.size(56.dp))
            Spacer(Modifier.height(10.dp))
            Text(stringResource(R.string.glasses_playing, model), color = Color.White.copy(alpha = 0.45f), fontSize = 15.sp)
        }
    }
}