//
//  MainTimelineAccessibilityCellLayout.swift
//  NetNewsWire-iOS
//
//  Created by Maurice Parker on 4/29/19.
//  Copyright © 2019 Ranchero Software. All rights reserved.
//

import UIKit
import RSCore

struct MainTimelineAccessibilityCellLayout: MainTimelineCellLayout {

	let height: CGFloat
	let unreadIndicatorRect: CGRect
	let starRect: CGRect
	let iconImageRect: CGRect
	let titleRect: CGRect
	let summaryRect: CGRect
	let feedNameRect: CGRect
	let dateRect: CGRect

	init(width: CGFloat, insets: UIEdgeInsets, cellData: MainTimelineCellData) {

		var currentPoint = CGPoint.zero
		currentPoint.x = MainTimelineDefaultCellLayout.cellPadding.left + insets.left + MainTimelineDefaultCellLayout.unreadCircleMarginLeft
		currentPoint.y = MainTimelineDefaultCellLayout.cellPadding.top

		// Unread Indicator and Star
		self.unreadIndicatorRect = MainTimelineAccessibilityCellLayout.rectForUnreadIndicator(currentPoint)
		self.starRect = MainTimelineAccessibilityCellLayout.rectForStar(currentPoint)

		// Start the point at the beginning position of the main block
		currentPoint.x += MainTimelineDefaultCellLayout.unreadCircleDimension + MainTimelineDefaultCellLayout.unreadCircleMarginRight

		// Icon Image
		if cellData.showIcon {
			self.iconImageRect = MainTimelineAccessibilityCellLayout.rectForIconView(currentPoint, iconSize: cellData.iconSize)
			currentPoint.y = self.iconImageRect.maxY
		} else {
			self.iconImageRect = CGRect.zero
		}

		let textAreaWidth = width - (currentPoint.x + MainTimelineDefaultCellLayout.cellPadding.right + insets.right)

		// Title Text Block
		let (titleRect, numberOfLinesForTitle) = MainTimelineAccessibilityCellLayout.rectForTitle(cellData, currentPoint, textAreaWidth)
		self.titleRect = titleRect

		// Summary Text Block
		if self.titleRect != CGRect.zero {
			currentPoint.y = self.titleRect.maxY + MainTimelineDefaultCellLayout.titleBottomMargin
		}
		self.summaryRect = MainTimelineAccessibilityCellLayout.rectForSummary(cellData, currentPoint, textAreaWidth, numberOfLinesForTitle)

		currentPoint.y = [self.titleRect, self.summaryRect].maxY()

		if cellData.showFeedName != .none {
			self.feedNameRect = MainTimelineAccessibilityCellLayout.rectForFeedName(cellData, currentPoint, textAreaWidth)
			currentPoint.y = self.feedNameRect.maxY
		} else {
			self.feedNameRect = CGRect.zero
		}

		// Feed Name and Pub Date
		self.dateRect = MainTimelineAccessibilityCellLayout.rectForDate(cellData, currentPoint, textAreaWidth)

		self.height = self.dateRect.maxY + MainTimelineDefaultCellLayout.cellPadding.bottom

	}

}

// MARK: - Calculate Rects

private extension MainTimelineAccessibilityCellLayout {

	static func rectForDate(_ cellData: MainTimelineCellData, _ point: CGPoint, _ textAreaWidth: CGFloat) -> CGRect {

		var r = CGRect.zero

		let size = SingleLineUILabelSizer.size(for: cellData.dateString, font: MainTimelineDefaultCellLayout.dateFont)
		r.size = size
		r.origin = point

		return r

	}

}