package com.tt.honeyDue.widget

import android.content.Context
import android.content.Intent
import androidx.compose.runtime.Composable
import androidx.compose.ui.unit.dp
import androidx.glance.GlanceId
import androidx.glance.GlanceModifier
import androidx.glance.action.ActionParameters
import androidx.glance.action.actionParametersOf
import androidx.glance.action.clickable
import androidx.glance.appwidget.GlanceAppWidget
import androidx.glance.appwidget.GlanceAppWidgetReceiver
import androidx.glance.appwidget.SizeMode
import androidx.glance.appwidget.action.ActionCallback
import androidx.glance.appwidget.action.actionRunCallback
import androidx.glance.appwidget.provideContent
import androidx.glance.background
import androidx.glance.layout.Alignment
import androidx.glance.layout.Box
import androidx.glance.layout.Column
import androidx.glance.layout.Spacer
import androidx.glance.layout.fillMaxSize
import androidx.glance.layout.height
import androidx.glance.layout.padding

/**
 * Small (2x2) widget.
 *
 * Mirrors iOS `SmallWidgetView` / `FreeWidgetView` in
 * `iosApp/HoneyDue/HoneyDue.swift`:
 *  - Free tier  → big count + "tasks waiting" label.
 *  - Premium    → task count header + single next-task row with
 *    an inline complete button wired to [CompleteTaskAction].
 *
 * Glance restriction: no radial gradients or custom shapes, so the
 * "organic" glow behind the number is dropped. Cream background and
 * primary/accent colors match iOS.
 */
class HoneyDueSmallWidget : GlanceAppWidget() {

    override val sizeMode: SizeMode = SizeMode.Single

    override suspend fun provideGlance(context: Context, id: GlanceId) {
        val repo = WidgetDataRepository.get(context)
        val tasks = repo.loadTasks()
        val tier = repo.loadTierState()
        val isPremium = tier.equals("premium", ignoreCase = true)

        provideContent {
            SmallWidgetContent(tasks, isPremium)
        }
    }

    @Composable
    private fun SmallWidgetContent(
        tasks: List<WidgetTaskDto>,
        isPremium: Boolean
    ) {
        val openApp = actionRunCallback<OpenAppAction>()

        Box(
            modifier = GlanceModifier
                .fillMaxSize()
                .background(WidgetColors.BACKGROUND_PRIMARY)
                .padding(12.dp)
                .clickable(openApp),
            contentAlignment = Alignment.Center
        ) {
            if (!isPremium) {
                Column(
                    horizontalAlignment = Alignment.CenterHorizontally,
                    verticalAlignment = Alignment.CenterVertically,
                    modifier = GlanceModifier.fillMaxSize()
                ) {
                    TaskCountBlock(count = tasks.size, long = true)
                }
            } else {
                Column(modifier = GlanceModifier.fillMaxSize()) {
                    TaskCountBlock(count = tasks.size, long = false)

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

                    val nextTask = tasks.firstOrNull()
                    if (nextTask != null) {
                        TaskRow(
                            task = nextTask,
                            compact = true,
                            showResidence = false,
                            onTaskClick = openApp,
                            trailing = {
                                CompleteButton(taskId = nextTask.id)
                            }
                        )
                    } else {
                        EmptyState(compact = true, onTap = openApp)
                    }
                }
            }
        }
    }
}

/**
 * Launch the main activity when the widget is tapped.
 *
 * Shared across all three widget sizes. Task-completion actions live
 * in Stream M's [CompleteTaskAction]; this receiver handles plain
 * "open app" taps.
 */
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)
        }
    }
}

/** AppWidget receiver for the small widget. */
class HoneyDueSmallWidgetReceiver : GlanceAppWidgetReceiver() {
    override val glanceAppWidget: GlanceAppWidget = HoneyDueSmallWidget()
}