import Vapor
import Foundation
import FoundationNetworking
import Crypto
import Leaf

func routes(_ app: Application) throws {
    // Render home page when root domain is loaded
    app.get { req  -> EventLoopFuture<View> in
        let fileData = try String(contentsOfFile: "\(app.directory.resourcesDirectory)/config.json").data(using: .utf8)
        let config: Config = try! JSONDecoder().decode(Config.self, from: fileData!)
        let loginStatus = req.session.data["loggedIn"] ?? "false"
        let loginBool = loginStatus == "true" ? true : false
        return req.view.render("home", LContext(config: config, loggedIn: loginBool))
    }

    app.get("status", ":url") { req -> [String: String] in
        let url = URL(string: "http://\(req.parameters.get("url")!)")
        let config = URLSessionConfiguration.default
        config.timeoutIntervalForRequest = 5
        config.timeoutIntervalForResource = 5
        var statusDict: [String:String] = [:]
        var headReq = URLRequest(url: url!)
        headReq.httpMethod = "HEAD"
        headReq.timeoutInterval = 5
        let semaphore = DispatchSemaphore(value: 0)
        URLSession.shared.dataTask(with: headReq, completionHandler:  { (_, response, error) in
            if let httpURLResponse = response as? HTTPURLResponse {
                statusDict["code"] = String(httpURLResponse.statusCode)
                statusDict["down"] = "false"
            }
            semaphore.signal()
        }).resume()
        semaphore.wait()
        return statusDict.count > 0 ? statusDict : ["code": "0", "down": "true"]
    }

    app.get("login") { req -> EventLoopFuture<View> in
        let fileData = try String(contentsOfFile: "\(app.directory.resourcesDirectory)/config.json").data(using: .utf8)
        let config: Config = try! JSONDecoder().decode(Config.self, from: fileData!)
        return req.view.render("login", LContext(config: config, loggedIn: false))
    }

    app.post("login") { req -> Response in
        let data = try req.content.decode(Login.self)
        let fileData = try String(contentsOfFile: "\(app.directory.resourcesDirectory)/config.json").data(using: .utf8)
        let config: Config = try! JSONDecoder().decode(Config.self, from: fileData!)
        let loginPassData = data.password?.data(using: .utf8)
        let loginPassHash = SHA256.hash(data: loginPassData ?? "".data(using: .utf8)!)
        let stringHash = loginPassHash.map { String(format: "%02hhx", $0) }.joined()
        if stringHash == config.passwordHash {
            req.session.data["loggedIn"] = "true"
            return try req.redirect(to: "/")
        } else {
            throw Abort(.unauthorized)
        }
    }

    app.get("logout") { req -> Response in
        req.session.destroy()
        return try req.redirect(to: "/")
    }


}