//
//  ImageExtensionGenerator.swift
//  
//
//  Created by Thibaut Schmitt on 14/02/2022.
//

import ToolCore
import Foundation

class ImageExtensionGenerator {
  
    // MARK: - Extension files
    
    static func writeStringsFiles(images: [ParsedImage], staticVar: Bool, inputFilename: String, extensionName: String, extensionFilePath: String) {
        // Get header/footer
        let extensionHeader = Self.getHeader(inputFilename: inputFilename, extensionClassname: extensionName)
        let extensionFooter = Self.getFooter()
        
        // Create content
        let extensionContent: String = {
            var content = ""
            images.forEach { img in
                if staticVar {
                    content += "\n\(img.getStaticImageProperty())"
                } else {
                    content += "\n\(img.getImageProperty())"
                }
                content += "\n "
            }
            return content
        }()
        
        // Create file if not exists
        let fileManager = FileManager()
        if fileManager.fileExists(atPath: extensionFilePath) == false {
            Shell.shell("touch", "\(extensionFilePath)")
        }
        
        // Generate extension
        Self.generateExtensionFile(extensionFilePath: extensionFilePath, extensionHeader, extensionContent, extensionFooter)
    }
    
    // MARK: - pragm
    
    private static func generateExtensionFile(extensionFilePath: String, _ args: String...) {
        // Create file if not exists
        let fileManager = FileManager()
        if fileManager.fileExists(atPath: extensionFilePath) == false {
            Shell.shell("touch", "\(extensionFilePath)")
        }

        // Create extension content
        let extensionContent = args.joined(separator: "\n")

        // Write content
        let extensionFilePathURL = URL(fileURLWithPath: extensionFilePath)
        do {
            try extensionContent.write(to: extensionFilePathURL, atomically: true, encoding: .utf8)
        } catch (let error) {
            let error = ImagiumError.writeFile(extensionFilePath, error.localizedDescription)
            print(error.localizedDescription)
            Imagium.exit(withError: error)
        }
    }
    
    private static func getHeader(inputFilename: String, extensionClassname: String) -> String {
        """
        // Generated by ResgenSwift.Imagium \(ResgenSwiftVersion)
        // Images from \(inputFilename)
        
        import UIKit
        
        extension \(extensionClassname) {
        """
    }
    
    private static func getFooter() -> String {
        """
        }
        """
    }
}

//@objc var onboarding_foreground3: UIImage {
//        return UIImage(named: "onboarding_foreground3")!
//    }