namespace BenchtopParser {
    public class Parser {
        public static List<I28.ProgramConfig> I28_ProgramConfig(String program_config) {
            List<I28.ProgramConfig> program_configs = new List<I28.ProgramConfig>();
            I28.ProgramConfig? current = null;
            
            foreach (var line in program_config.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries)) {
                var config_line = line.Split("\t").ToList();
                if (config_line.Count() < 2) {
                    throw new Exception("Invalid Program Config, please provide an I28 Program Config file data");
                }
                config_line.RemoveAt(0); // Remove random hex value
                config_line.RemoveAt(0); // Remove L column
                if (config_line[0].StartsWith("Start,")) {
                    // initialize programconfig
                    current = new I28.ProgramConfig();
                    continue;
                }
                if (config_line[0].StartsWith("Stop,")) {
                    // Short circuit early when stop comes.
                    program_configs.Add(current);
                    break;
                }
                var config = config_line[0].Split(",", 2).ToList();
                if (config_line.Count() == 1) {
                    // Set Program Number
                    if (current == null) {
                        throw new Exception("Setting Program Number Before Start. Error In Config");
                    }
                    Console.WriteLine(config[1]);
                    current.ProgramNumber = config[1];
                    continue;
                }


                // Skip numbers, keep value
                var value = config[1];


                var programnumber_group_data = value.Split('\\');
                var data = programnumber_group_data[2];
                if (data.StartsWith("=")) { continue; /* comment line */ }

                var lineConfig = new I28.Configuration();
                lineConfig.unit = config_line[1];
                lineConfig.type = config_line[2]; //a, c, f, i
                var name_value = data.Split("=");
                lineConfig.name = name_value[0];
                lineConfig.value = name_value[1];

                // Deal with this group logic
                var group = programnumber_group_data[1];
                if (current != null && !current.Group.ContainsKey(group)) {
                    current.Group.Add(group, new List<I28.Configuration> { lineConfig });
                } else if (current != null ) {
                    current.Group[group].Add(lineConfig);
                } else {
                    throw new Exception("Config list is null, something broke");
                }
            }
            // TODO: What if multiple configs how to handle start and stop?

            return program_configs;
        }
    }
}