#if !hasFeature(Embedded)
import Foundation
#endif

@main
struct Day {
    static func run() {
        guard let input = testInput else {
            print("input sttring nil")
            return
        }
        print("Parsing...")
        let parsed = parseInput(input)
        print("Running Part 1...")
        part1(parsed)
        print("Running Part 2...")
        part2(parsed)
        print("Finished!")
    }

    typealias ParsedInput = String

    static func parseInput(_ input: String) -> ParsedInput {
        return input
    }

    static func part1(_ input: ParsedInput) {
    }

    static func part2(_ input: ParsedInput) {
    }

    #if hasFeature(Embedded)
    static func main() {
        gfxInitDefault()
        consoleInit(GFX_TOP, nil)

        guard romfsInit() == 0 else {
            print("Couldn't init RomFS")
            return
        }

        testInput = stringFromFile("romfs:/test.txt")
        realInput = stringFromFile("romfs:/input.txt")

        run()

        while aptMainLoop() {
            hidScanInput()
            let kDown = hidKeysDown()
            if kDown & KEY_START != 0 {
                break
            }

            gfxFlushBuffers()
            gfxSwapBuffers()
        }

        romfsExit()
        gfxExit()
    }

    static func stringFromFile(_ path: String) -> String? {
        let file = fopen(path, "r")
        var ret = ""
        var buf = [CChar](repeating: 0, count: 100)
        while fgets(&buf, 100, file) != nil {
           ret += String(cString: buf)
        }
        guard feof(file) != 0 else {
            print("Error reading file \(path)")
            return nil
        }
        while ret.first?.isNewline ?? false {
            ret.removeFirst()
        }
        while ret.last?.isNewline ?? false {
            ret.removeLast()
        }
        return ret
    }
    #else
    static func main() {
        testInput = try? String(contentsOfFile: "romfs/test.txt").trimmingCharacters(in: .whitespacesAndNewlines)
        realInput = try? String(contentsOfFile: "romfs/input.txt").trimmingCharacters(in: .whitespacesAndNewlines)

        run()
    }
    #endif

}

var testInput: String? = nil

var realInput: String? = nil