package com.schoolapp.cleverclass

import android.content.Context
import android.content.Intent
import android.graphics.drawable.Icon
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.ArrowBack
import androidx.compose.material.icons.outlined.Edit
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.Icon
import androidx.compose.material3.IconButton
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.material3.TopAppBar
import androidx.compose.material3.TopAppBarDefaults
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.unit.dp
import androidx.core.content.ContextCompat.startActivity
import com.schoolapp.cleverclass.LessonStoreManager.getLessons
import com.schoolapp.cleverclass.ui.theme.CleverClassTheme
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch

private val listOfDays = listOf("Mo", "Di", "Mi", "Do", "Fr")
private val lessonGrabberIndex = 0

class StundenplanActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val sharedPreferences = this.getSharedPreferences("TimeTable", Context.MODE_PRIVATE)
        val setupDone = sharedPreferences.getBoolean("setupDone", false)

        setContent {
            CleverClassTheme {
                Surface(
                    modifier = Modifier.fillMaxSize(),
                    color = MaterialTheme.colorScheme.background
                ) {
                    if (!setupDone) {
                        val intent = Intent(this@StundenplanActivity, TimeTableSetupActivity::class.java).apply {
                            putExtra(TimeTableSetupActivity.TYPE_KEY, "TimeSetup")
                        }
                        startActivity(intent)
                    }

                    StundenplanContent(activity = this)
                }
            }
        }
    }
}

// Content of Stundenplan
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun StundenplanContent(activity: ComponentActivity){
    Column() {
        TopAppBar(
            colors = TopAppBarDefaults.centerAlignedTopAppBarColors(MaterialTheme.colorScheme.primaryContainer),
            title = {
                Text(text = "Stundenplan",
                    style = MaterialTheme.typography.headlineSmall,
                    color = MaterialTheme.colorScheme.onPrimaryContainer
                )},
            navigationIcon = {
                IconButton(onClick = { activity.finish() }) {
                    Icon(
                        imageVector = Icons.Filled.ArrowBack,
                        contentDescription = null,
                        modifier = Modifier.size(28.dp),
                        tint = MaterialTheme.colorScheme.onPrimaryContainer
                    )
                }
            },
            actions ={
                IconButton(onClick = {
                    val intent = Intent(activity, TimeTableSetupActivity::class.java).apply {
                        putExtra(TimeTableSetupActivity.TYPE_KEY, "TimeSetup")
                    }
                    startActivity(activity, intent, null)
                }) {
                         Icon(
                             imageVector = Icons.Outlined.Edit,
                             contentDescription = null,
                             modifier = Modifier.size(28.dp),
                             tint = MaterialTheme.colorScheme.onPrimaryContainer
                         )
                }
            },
            modifier = Modifier.fillMaxWidth()
        )

        Column() {
            listOfDays.forEach() {currentDay ->
                Day(currentDay)
            }
        }
    }
}

data class LessonData(
    var subject: String,
    var teacher: String,
    var room: String
)

@Composable
fun Day(day: String) {
    var lessons = emptyList<LessonData>()
    val context = LocalContext.current
    Column {
        LaunchedEffect(lessons, context) {
            getLessons(context, day).collect { savedLessons ->
                lessons = savedLessons.toMutableList()
            }
        }
        lessons.forEach() {lessonData ->
            Lesson(subject = lessonData.subject, teacher = lessonData.teacher, room = lessonData.room)
        }
    }
}

@Composable
fun Lesson(subject: String, teacher: String, room: String) {
    Box(modifier = Modifier
        .size(200.dp, 100.dp)
        .padding(3.dp)
    ) {
        Text(
            modifier = Modifier.align(Alignment.Center),
            text = "$subject\n@$room\n/w$teacher")
    }
}

fun currentDay(): String {
    return "hi"
}