using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BenchtopParser {
    public class TransducerVerify {

        public Dictionary<int, Transducer> transducers = new();
        public int indent = 26; // Default 26 from seeing files, overridden later in SetIndent for safety


        /// Split the string, and clean up whitespace, returns the Name and Value
        public String[] SplitLine(String line) {
            return new[] {
                line[..indent].TrimEnd(),
                line[(indent + 1)..]
            };
        }
        public void SetIndent(int id, String line) {
            int endOfCurrentTransducerKey = $"Transducer {id}".Length;
            string restOfLine = line.Substring(endOfCurrentTransducerKey);
            int additionalSpaces = restOfLine.TakeWhile(c => c == ' ').Count();
            // length 1 based, remove 1, then add additional spaces
            this.indent = endOfCurrentTransducerKey - 1 + additionalSpaces;
        }

        public TransducerVerify() {
            return;
        }

        public TransducerVerify(String transducer_verify_value) {
            string separator = "===============================================================";
            List<String> documentLines = transducer_verify_value.Split(new string[] { Environment.NewLine }, StringSplitOptions.TrimEntries).ToList();

            // Check if proper document
            string title = documentLines[0];
            documentLines.RemoveAt(0);
            if (title != "|| Transducer Verify Report ||") {
                throw new Exception("Invalid Transducer Verify Report, please provide a Transducer Verify Report file data");
            }

            Dictionary<String, int> countDict = documentLines.GroupBy(p => p).ToDictionary(p => p.Key, q => q.Count());
            int numTransducers = countDict[separator];
            int currentTransducer = 0; // ONE BASED - will add 1 later at check step, but first transducer is 1.

            // Find the the indexes of each transducer start and stop
            for (int i = 0; i < documentLines.Count(); i++) {
                string line = documentLines[i];
                if (line == $"TRANSDUCER{currentTransducer + 1}") {
                    currentTransducer++;
                    continue; // Skip TITLE line and separator
                }
                if (line == separator) {
                    continue;
                }

                if (line == "") {
                    // end of current transducer
                    continue;
                }
                // Add new Transducer if not present
                if (transducers != null && !this.transducers.ContainsKey(currentTransducer)) {
                    transducers.Add(currentTransducer, new Transducer(currentTransducer));
                    // Calculating indent
                    SetIndent(currentTransducer, line);
                    transducers[currentTransducer].name = SplitLine(line)[1];

                    continue;
                }
                // Add transducer parameters
                string[] _line = SplitLine(line);
                if (transducers != null) {
                    transducers[currentTransducer].parameters[_line[0]] = _line[1];
                } else {
                    throw new Exception("Config list is null, something broke");
                }
            }
        }

    }

    public class Transducer {
        public int id;
        public String? name;
        public Dictionary<String, String> parameters = new();
        public Transducer(int id) {
            this.id = id;
        }
    }
}