tasks/app/src/main/java/com/todoroo/astrid/adapter/TaskAdapter.kt

/*
 * Copyright (c) 2012 Todoroo Inc
 *
 * See the file "LICENSE" for the full license governing this code.
 */
package com.todoroo.astrid.adapter

import com.todoroo.astrid.data.Task
import org.tasks.data.TaskContainer
import org.tasks.tasklist.TaskListRecyclerAdapter
import org.tasks.tasklist.ViewHolder
import java.util.*

open class TaskAdapter {
    private val selected = HashSet<Long>()
    private lateinit var helper: TaskListRecyclerAdapter

    val count: Int
        get() = helper.itemCount

    fun setHelper(helper: TaskListRecyclerAdapter) {
        this.helper = helper
    }

    val numSelected: Int
        get() = selected.size

    fun getSelected(): ArrayList<Long> = ArrayList(selected)

    fun setSelected(vararg ids: Long) = setSelected(ids.toList())

    fun setSelected(ids: Collection<Long>) {
        selected.clear()
        selected.addAll(ids)
    }

    fun clearSelections() = selected.clear()

    open fun getIndent(task: TaskContainer): Int = task.getIndent()

    open fun canMove(source: ViewHolder, target: ViewHolder): Boolean = false

    open fun maxIndent(previousPosition: Int, task: TaskContainer): Int = 0

    open fun minIndent(nextPosition: Int, task: TaskContainer): Int = 0

    fun isSelected(task: TaskContainer): Boolean = selected.contains(task.id)

    fun toggleSelection(task: TaskContainer) {
        val id = task.id
        if (selected.contains(id)) {
            selected.remove(id)
        } else {
            selected.add(id)
        }
    }

    open fun supportsParentingOrManualSort(): Boolean = false

    open fun supportsManualSorting(): Boolean = false

    open fun moved(from: Int, to: Int, indent: Int) {}

    fun getTask(position: Int): TaskContainer = helper.getItem(position)

    fun getItemUuid(position: Int): String = getTask(position).uuid

    open fun onCompletedTask(task: TaskContainer, newState: Boolean) {}

    open fun onTaskCreated(uuid: String) {}

    open fun onTaskDeleted(task: Task) {}

    open fun supportsHiddenTasks(): Boolean = true
}