import {PRIORITIES, type Priority} from '@/constants/priorities'
import {SECONDS_A_DAY, SECONDS_A_HOUR, SECONDS_A_MONTH, SECONDS_A_WEEK, SECONDS_A_YEAR} from '@/constants/date'

import type {ITask} from '@/modelTypes/ITask'
import type {ILabel} from '@/modelTypes/ILabel'
import type {IUser} from '@/modelTypes/IUser'
import type {IAttachment} from '@/modelTypes/IAttachment'
import type {IProject} from '@/modelTypes/IProject'
import type {ISubscription} from '@/modelTypes/ISubscription'
import type {IBucket} from '@/modelTypes/IBucket'

import type {IRepeatAfter} from '@/types/IRepeatAfter'
import type {IRelationKind} from '@/types/IRelationKind'
import {TASK_REPEAT_MODES, type IRepeatMode} from '@/types/IRepeatMode'

import {parseDateOrNull} from '@/helpers/parseDateOrNull'

import AbstractModel from './abstractModel'
import LabelModel from './label'
import UserModel from './user'
import AttachmentModel from './attachment'
import SubscriptionModel from './subscription'
import type {ITaskReminder} from '@/modelTypes/ITaskReminder'
import TaskReminderModel from '@/models/taskReminder'
import {periodToSeconds, secondsToPeriod} from '@/helpers/time/period'

export const TASK_DEFAULT_COLOR = '#1973ff'

export function	getHexColor(hexColor: string): string {
	if (hexColor === '' || hexColor === '#') {
		return TASK_DEFAULT_COLOR
	}

	return hexColor
}

/**
 * Parses `repeatAfterSeconds` into a usable js object.
 */
export function parseRepeatAfter(repeatAfterSeconds: number): IRepeatAfter {
	
	const period = secondsToPeriod(repeatAfterSeconds)
	
	return {
		type: period.unit,
		amount: period.amount,
	}
}

export default class TaskModel extends AbstractModel<ITask> implements ITask {
	id = 0
	title = ''
	description = ''
	done = false
	doneAt: Date | null = null
	priority: Priority = PRIORITIES.UNSET
	labels: ILabel[] = []
	assignees: IUser[] = []

	dueDate: Date | null = 0
	startDate: Date | null = 0
	endDate: Date | null = 0
	repeatAfter: number | IRepeatAfter = 0
	repeatFromCurrentDate = false
	repeatMode: IRepeatMode = TASK_REPEAT_MODES.REPEAT_MODE_DEFAULT
	/* Make sure to not return reminderDates to the server.
	The server currently supports both reminderDates (old API) and reminder (new API) and assumes the old logic
	if it still receives reminderDates.
	This line and reminderDates attributes will be removed after https://kolaente.dev/vikunja/api/pulls/1448 was merged.
	*/
	reminderDates = null
	reminders: ITaskReminder[] = []
	parentTaskId: ITask['id'] = 0
	hexColor = ''
	percentDone = 0
	relatedTasks:  Partial<Record<IRelationKind, ITask[]>> = {}
	attachments: IAttachment[] = []
	coverImageAttachmentId: IAttachment['id'] = null
	identifier = ''
	index = 0
	isFavorite = false
	subscription: ISubscription = null
	coverImageAttachmentId: IAttachment['id'] = null

	position = 0
	kanbanPosition = 0

	createdBy: IUser = UserModel
	created: Date = null
	updated: Date = null

	projectId: IProject['id'] = 0
	bucketId: IBucket['id'] = 0

	constructor(data: Partial<ITask> = {}) {
		super()
		this.assignData(data)

		this.id = Number(this.id)
		this.title = this.title?.trim()
		this.doneAt = parseDateOrNull(this.doneAt)

		this.labels = this.labels
			.map(l => new LabelModel(l))
			.sort((f, s) => f.title > s.title ? 1 : -1)

		// Parse the assignees into user models
		this.assignees = this.assignees.map(a => {
			return new UserModel(a)
		})

		this.dueDate = parseDateOrNull(this.dueDate)
		this.startDate = parseDateOrNull(this.startDate)
		this.endDate = parseDateOrNull(this.endDate)

		// Parse the repeat after into something usable
		this.repeatAfter = parseRepeatAfter(this.repeatAfter as number)

		this.reminders = this.reminders.map(r => new TaskReminderModel(r))

		if (this.hexColor !== '' && this.hexColor.substring(0, 1) !== '#') {
			this.hexColor = '#' + this.hexColor
		}

		// Convert all subtasks to task models
		Object.keys(this.relatedTasks).forEach(relationKind => {
			this.relatedTasks[relationKind] = this.relatedTasks[relationKind].map(t => {
				return new TaskModel(t)
			})
		})

		// Make all attachments to attachment models
		this.attachments = this.attachments.map(a => new AttachmentModel(a))

		// Set the task identifier to empty if the project does not have one
		if (this.identifier === `-${this.index}`) {
			this.identifier = ''
		}

		if (typeof this.subscription !== 'undefined' && this.subscription !== null) {
			this.subscription = new SubscriptionModel(this.subscription)
		}

		this.createdBy = new UserModel(this.createdBy)
		this.created = new Date(this.created)
		this.updated = new Date(this.updated)

		this.projectId = Number(this.projectId)
	}

	getTextIdentifier() {
		if (this.identifier === '') {
			return `#${this.index}`
		}

		return this.identifier
	}

	getHexColor() {
		return getHexColor(this.hexColor)
	}
}