//
//  String+Ext.swift
//  gen_html
//
//  Created by Isaac Paul on 9/25/25.
//

import Foundation

extension String {
    init(readFromUrl:URL) throws {
        let inputHandle = try FileHandle(forReadingFrom: readFromUrl)
        guard let data = try inputHandle.readToEnd() else {
            throw AppError("Empty input.")
        }
        guard let fileStr = String(data: data, encoding: .utf8) else {
            throw AppError("Unable to decode data as utf-8 string")
        }
        self = fileStr
    }
    
    func uppercaseFirstLetter() -> String {
        guard let firstLetter = self.first else { return self }
        return firstLetter.uppercased() + self.dropFirst()
    }
    
    func fixPoorCharactersForVariables() -> String {
        let firstPass = self.camelCaseBy("-")
        let secondPass = firstPass.replacingOccurrences(of: "/", with: "_")

        return secondPass
    }
    
    func camelCaseBy(_ c: Character) -> String {
        let components = self.split(separator: c)
        guard let first = components.first?.lowercased() else { return "" }
        
        let rest = components.dropFirst().map { $0.capitalized }
        let camelCase = ([first] + rest).joined()

        return camelCase
    }
}