package com.sp365.calendar.components

import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.detectVerticalDragGestures
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.runtime.Composable
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.input.pointer.pointerInput
import androidx.compose.ui.unit.dp
import com.google.accompanist.pager.ExperimentalPagerApi
import com.google.accompanist.pager.rememberPagerState
import com.sp365.calendar.model.EventNative
import com.sp365.calendar.model.JobList
import com.sp365.calendar.utils.calculateWeeksFromStart
import java.time.LocalDate

@OptIn(ExperimentalPagerApi::class)
@Composable
fun CalendarWithTaskScreen(job: List<EventNative>) {
    var currentDate by remember { mutableStateOf(LocalDate.now()) }

    val initialPage = calculateWeeksFromStart(LocalDate.now()) + 5000
    val pagerState = rememberPagerState(initialPage = initialPage)
    var isExpanded by remember { mutableStateOf(false) }

    Column(
        modifier = Modifier
            .fillMaxSize()
            .background(color = Color(0xFFEDEDED))
    ) {
        WeekHeader()

        if (isExpanded) {
            MonthCalendar(
                currentDate = currentDate,
                onDateSelected = { newDate -> currentDate = newDate }
            )
        } else {
            WeekPager(
                pagerState = pagerState,
                currentDate = currentDate,
                onDateSelected = { newDate -> currentDate = newDate }
            )
        }

        Box(
            modifier = Modifier
                .fillMaxWidth()
                .height(24.dp)
                .background(
                    Color.White,
                    shape = RoundedCornerShape(
                        bottomStart = 12.dp,
                        bottomEnd = 12.dp
                    )
                )
                .padding(vertical = 4.dp)
                .pointerInput(Unit) {
                    detectVerticalDragGestures(
                        onVerticalDrag = { _, dragAmount ->
                            isExpanded = dragAmount > 0
                        }
                    )
                },
            contentAlignment = Alignment.Center
        ) {
            Box(
                modifier = Modifier
                    .width(60.dp)
                    .height(4.dp)
                    .background(Color.Gray)
            )
        }

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

        TaskList(
            currentDate = currentDate,
            jobs = job,
            onDateChange = { newDate -> currentDate = newDate }
        )
    }
}