import Foundation
import UIKit
import Display
import AppBundle

private func drawBorder(context: CGContext, rect: CGRect) {
    context.setLineWidth(UIScreenPixel)
    context.setStrokeColor(UIColor(rgb: 0xffffff, alpha: 0.25).cgColor)
    let path = CGPath(roundedRect: rect.insetBy(dx: UIScreenPixel / 2.0, dy: UIScreenPixel / 2.0), cornerWidth: 6.0, cornerHeight: 6.0, transform: nil)
    context.addPath(path)
    context.strokePath()
}

private func addRoundedRectPath(context: CGContext, rect: CGRect, radius: CGFloat) {
    context.saveGState()
    context.translateBy(x: rect.minX, y: rect.minY)
    context.scaleBy(x: radius, y: radius)
    let fw = rect.width / radius
    let fh = rect.height / radius
    context.move(to: CGPoint(x: fw, y: fh / 2.0))
    context.addArc(tangent1End: CGPoint(x: fw, y: fh), tangent2End: CGPoint(x: fw/2, y: fh), radius: 1.0)
    context.addArc(tangent1End: CGPoint(x: 0, y: fh), tangent2End: CGPoint(x: 0, y: fh/2), radius: 1)
    context.addArc(tangent1End: CGPoint(x: 0, y: 0), tangent2End: CGPoint(x: fw/2, y: 0), radius: 1)
    context.addArc(tangent1End: CGPoint(x: fw, y: 0), tangent2End: CGPoint(x: fw, y: fh/2), radius: 1)
    context.closePath()
    context.restoreGState()
}

private func renderIcon(name: String, scaleFactor: CGFloat = 1.0, backgroundColors: [UIColor]? = nil) -> UIImage? {
    return generateImage(CGSize(width: 29.0, height: 29.0), contextGenerator: { size, context in
        let bounds = CGRect(origin: CGPoint(), size: size)
        context.clear(bounds)
        
        if let backgroundColors {
            addRoundedRectPath(context: context, rect: CGRect(origin: CGPoint(), size: size), radius: 7.0)
            context.clip()
            
            var locations: [CGFloat] = [0.0, 1.0]
            let colors: [CGColor] = backgroundColors.map(\.cgColor)
            
            let colorSpace = CGColorSpaceCreateDeviceRGB()
            let gradient = CGGradient(colorsSpace: colorSpace, colors: colors as CFArray, locations: &locations)!
            
            context.drawLinearGradient(gradient, start: CGPoint(x: size.width, y: size.height), end: CGPoint(x: 0.0, y: 0.0), options: CGGradientDrawingOptions())
            
            context.resetClip()
            if let image = generateTintedImage(image: UIImage(bundleImageName: name), color: .white), let cgImage = image.cgImage {
                let imageSize = CGSize(width: image.size.width * scaleFactor, height: image.size.height * scaleFactor)
                context.draw(cgImage, in: CGRect(origin: CGPoint(x: (bounds.width - imageSize.width) * 0.5, y: (bounds.height - imageSize.height) * 0.5), size: imageSize))
            }
        } else {
            if let image = UIImage(bundleImageName: name), let cgImage = image.cgImage {
                let imageSize: CGSize
                if scaleFactor == 1.0 {
                    imageSize = size
                } else {
                    imageSize = CGSize(width: image.size.width * scaleFactor, height: image.size.height * scaleFactor)
                }
                context.draw(cgImage, in: CGRect(origin: CGPoint(x: (bounds.width - imageSize.width) * 0.5, y: (bounds.height - imageSize.height) * 0.5), size: imageSize))
            }
        }
    })
}

public struct PresentationResourcesSettings {
    public static let editProfile = renderIcon(name: "Settings/Menu/EditProfile")
    public static let proxy = renderIcon(name: "Settings/Menu/Proxy")
    public static let savedMessages = renderIcon(name: "Settings/Menu/SavedMessages")
    public static let recentCalls = renderIcon(name: "Settings/Menu/RecentCalls")
    public static let devices = renderIcon(name: "Settings/Menu/Sessions")
    public static let chatFolders = renderIcon(name: "Settings/Menu/ChatListFilters")
    public static let stickers = renderIcon(name: "Settings/Menu/Stickers")
    public static let notifications = renderIcon(name: "Settings/Menu/Notifications")
    public static let security = renderIcon(name: "Settings/Menu/Security")
    public static let dataAndStorage = renderIcon(name: "Settings/Menu/DataAndStorage")
    public static let appearance = renderIcon(name: "Settings/Menu/Appearance")
    public static let language = renderIcon(name: "Settings/Menu/Language")
    public static let deleteAccount = renderIcon(name: "Chat/Info/GroupRemovedIcon")
    public static let powerSaving = renderIcon(name: "Settings/Menu/PowerSaving")
    public static let stories = renderIcon(name: "Premium/Perk/Stories", scaleFactor: 0.97, backgroundColors: [UIColor(rgb: 0x5856D6)])
    public static let premiumGift = renderIcon(name: "Settings/Menu/Gift")
    public static let business = renderIcon(name: "Settings/Menu/Business", backgroundColors: [UIColor(rgb: 0xA95CE3), UIColor(rgb: 0xF16B80)])
    public static let myProfile = renderIcon(name: "Settings/Menu/Profile")
    public static let reactions = renderIcon(name: "Settings/Menu/Reactions")
    
    public static let premium = generateImage(CGSize(width: 29.0, height: 29.0), contextGenerator: { size, context in
        let bounds = CGRect(origin: CGPoint(), size: size)
        context.clear(bounds)
        
        let path = UIBezierPath(roundedRect: bounds, cornerRadius: 7.0)
        context.addPath(path.cgPath)
        context.clip()
        
        let colorsArray: [CGColor] = [
            UIColor(rgb: 0x6b93ff).cgColor,
            UIColor(rgb: 0x6b93ff).cgColor,
            UIColor(rgb: 0x8d77ff).cgColor,
            UIColor(rgb: 0xb56eec).cgColor,
            UIColor(rgb: 0xb56eec).cgColor
        ]
        var locations: [CGFloat] = [0.0, 0.15, 0.5, 0.85, 1.0]
        let gradient = CGGradient(colorsSpace: deviceColorSpace, colors: colorsArray as CFArray, locations: &locations)!

        context.drawLinearGradient(gradient, start: CGPoint(x: 0.0, y: 0.0), end: CGPoint(x: size.width, y: size.height), options: CGGradientDrawingOptions())
        
        if let image = generateTintedImage(image: UIImage(bundleImageName: "Premium/ButtonIcon"), color: UIColor(rgb: 0xffffff)), let cgImage = image.cgImage {
            context.draw(cgImage, in: CGRect(origin: CGPoint(x: floorToScreenPixels((bounds.width - image.size.width) / 2.0), y: floorToScreenPixels((bounds.height - image.size.height) / 2.0)), size: image.size))
        }
        
        drawBorder(context: context, rect: bounds)
    })
    
    public static let stars = generateImage(CGSize(width: 29.0, height: 29.0), contextGenerator: { size, context in
        let bounds = CGRect(origin: CGPoint(), size: size)
        context.clear(bounds)
        
        let path = UIBezierPath(roundedRect: bounds, cornerRadius: 7.0)
        context.addPath(path.cgPath)
        context.clip()
        
        let colorsArray: [CGColor] = [
            UIColor(rgb: 0xfec80f).cgColor,
            UIColor(rgb: 0xdd6f12).cgColor
        ]
        var locations: [CGFloat] = [0.0, 1.0]
        let gradient = CGGradient(colorsSpace: deviceColorSpace, colors: colorsArray as CFArray, locations: &locations)!

        context.drawLinearGradient(gradient, start: CGPoint(x: 0.0, y: 0.0), end: CGPoint(x: size.width, y: size.height), options: CGGradientDrawingOptions())
        
        if let image = generateTintedImage(image: UIImage(bundleImageName: "Premium/ButtonIcon"), color: UIColor(rgb: 0xffffff)), let cgImage = image.cgImage {
            context.draw(cgImage, in: CGRect(origin: CGPoint(x: floorToScreenPixels((bounds.width - image.size.width) / 2.0), y: floorToScreenPixels((bounds.height - image.size.height) / 2.0)), size: image.size))
        }
        
        drawBorder(context: context, rect: bounds)
    })

    public static let passport = renderIcon(name: "Settings/Menu/Passport")
    public static let watch = renderIcon(name: "Settings/Menu/Watch")
    
    public static let support = renderIcon(name: "Settings/Menu/Support")
    public static let faq = renderIcon(name: "Settings/Menu/Faq")
    public static let tips = renderIcon(name: "Settings/Menu/Tips")
    
    public static let addAccount = renderIcon(name: "Settings/Menu/AddAccount")
    public static let setPasscode = renderIcon(name: "Settings/Menu/SetPasscode")
    public static let clearCache = renderIcon(name: "Settings/Menu/ClearCache")
    public static let changePhoneNumber = renderIcon(name: "Settings/Menu/ChangePhoneNumber")
    
    public static let deleteAddAccount = renderIcon(name: "Settings/Menu/DeleteAddAccount")
    public static let deleteSetTwoStepAuth = renderIcon(name: "Settings/Menu/DeleteTwoStepAuth")
    public static let deleteSetPasscode = renderIcon(name: "Settings/Menu/FaceId")
    public static let deleteChats = renderIcon(name: "Settings/Menu/DeleteChats")
    public static let clearSynced = renderIcon(name: "Settings/Menu/ClearSynced")
    
    public static let websites = renderIcon(name: "Settings/Menu/Websites")
}