package com.example.casera.widget

import android.content.Context
import android.content.Intent
import androidx.compose.runtime.Composable
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.glance.GlanceId
import androidx.glance.GlanceModifier
import androidx.glance.GlanceTheme
import androidx.glance.Image
import androidx.glance.ImageProvider
import androidx.glance.action.ActionParameters
import androidx.glance.action.clickable
import androidx.glance.appwidget.GlanceAppWidget
import androidx.glance.appwidget.GlanceAppWidgetReceiver
import androidx.glance.appwidget.action.ActionCallback
import androidx.glance.appwidget.action.actionRunCallback
import androidx.glance.appwidget.provideContent
import androidx.glance.background
import androidx.glance.currentState
import androidx.glance.layout.Alignment
import androidx.glance.layout.Box
import androidx.glance.layout.Column
import androidx.glance.layout.Row
import androidx.glance.layout.Spacer
import androidx.glance.layout.fillMaxSize
import androidx.glance.layout.fillMaxWidth
import androidx.glance.layout.height
import androidx.glance.layout.padding
import androidx.glance.layout.size
import androidx.glance.layout.width
import androidx.glance.state.GlanceStateDefinition
import androidx.glance.state.PreferencesGlanceStateDefinition
import androidx.glance.text.FontWeight
import androidx.glance.text.Text
import androidx.glance.text.TextStyle
import androidx.glance.unit.ColorProvider
import androidx.datastore.preferences.core.Preferences
import androidx.datastore.preferences.core.intPreferencesKey
import com.example.casera.R

/**
 * Small widget showing task count summary
 * Size: 2x1 or 2x2
 */
class CaseraSmallWidget : GlanceAppWidget() {

    override val stateDefinition: GlanceStateDefinition<*> = PreferencesGlanceStateDefinition

    override suspend fun provideGlance(context: Context, id: GlanceId) {
        provideContent {
            GlanceTheme {
                SmallWidgetContent()
            }
        }
    }

    @Composable
    private fun SmallWidgetContent() {
        val prefs = currentState<Preferences>()
        val overdueCount = prefs[intPreferencesKey("overdue_count")] ?: 0
        val dueSoonCount = prefs[intPreferencesKey("due_soon_count")] ?: 0
        val inProgressCount = prefs[intPreferencesKey("in_progress_count")] ?: 0

        Box(
            modifier = GlanceModifier
                .fillMaxSize()
                .background(Color(0xFFFFF8E7)) // Cream background
                .clickable(actionRunCallback<OpenAppAction>())
                .padding(12.dp),
            contentAlignment = Alignment.Center
        ) {
            Column(
                modifier = GlanceModifier.fillMaxWidth(),
                horizontalAlignment = Alignment.CenterHorizontally
            ) {
                // App name/logo
                Text(
                    text = "Casera",
                    style = TextStyle(
                        color = ColorProvider(Color(0xFF07A0C3)),
                        fontSize = 16.sp,
                        fontWeight = FontWeight.Bold
                    )
                )

                Spacer(modifier = GlanceModifier.height(8.dp))

                // Task counts row
                Row(
                    modifier = GlanceModifier.fillMaxWidth(),
                    horizontalAlignment = Alignment.CenterHorizontally
                ) {
                    // Overdue
                    TaskCountItem(
                        count = overdueCount,
                        label = "Overdue",
                        color = Color(0xFFDD1C1A) // Red
                    )

                    Spacer(modifier = GlanceModifier.width(16.dp))

                    // Due Soon
                    TaskCountItem(
                        count = dueSoonCount,
                        label = "Due Soon",
                        color = Color(0xFFF5A623) // Amber
                    )

                    Spacer(modifier = GlanceModifier.width(16.dp))

                    // In Progress
                    TaskCountItem(
                        count = inProgressCount,
                        label = "Active",
                        color = Color(0xFF07A0C3) // Primary
                    )
                }
            }
        }
    }

    @Composable
    private fun TaskCountItem(count: Int, label: String, color: Color) {
        Column(
            horizontalAlignment = Alignment.CenterHorizontally
        ) {
            Text(
                text = count.toString(),
                style = TextStyle(
                    color = ColorProvider(color),
                    fontSize = 24.sp,
                    fontWeight = FontWeight.Bold
                )
            )
            Text(
                text = label,
                style = TextStyle(
                    color = ColorProvider(Color(0xFF666666)),
                    fontSize = 10.sp
                )
            )
        }
    }
}

/**
 * Action to open the main app
 */
class OpenAppAction : ActionCallback {
    override suspend fun onAction(
        context: Context,
        glanceId: GlanceId,
        parameters: ActionParameters
    ) {
        val intent = context.packageManager.getLaunchIntentForPackage(context.packageName)
        intent?.let {
            it.flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP
            context.startActivity(it)
        }
    }
}

/**
 * Receiver for the small widget
 */
class CaseraSmallWidgetReceiver : GlanceAppWidgetReceiver() {
    override val glanceAppWidget: GlanceAppWidget = CaseraSmallWidget()
}