using System;
using System.Collections.Generic;

namespace GenCycleVDP.Resources
{
    internal static class GenData
    {
        private static readonly Random random = new();
        private static readonly Dictionary<CycleStatus, (Func<CycleStatus> NextState, int Duration, (int min, int offset))> genDataMap = new()
        {
            {
                CycleStatus.EndTechCycle,
                (() => random.Next(100) < 50
                    ? CycleStatus.VacForMeltingScarp
                    : CycleStatus.VacForWelding,
                15,
                (7 * 60, 5 * 60))
            },
            {
                CycleStatus.LoadUnload,
                (() => CycleStatus.VacForWelding,
                15,
                (3 * 60, 2 * 60))
            },
            {
                CycleStatus.VacForWelding,
                (() => CycleStatus.Welding,
                10,
                (11 * 60, 1 * 60))
            },
            {
                CycleStatus.Welding,
                (() => CycleStatus.CoolingWelding,
                13,
                (4 * 60, 3 * 60))
            },
            {
                CycleStatus.CoolingWelding,
                (() => CycleStatus.CheckWelding,
                7,
                (4 * 60, 3 * 60))
            },
            {
                CycleStatus.CheckWelding,
                (() => random.Next(100) < 20
                    ? CycleStatus.Welding
                    : CycleStatus.VacForMelting,
                5,
                (7 * 60, 2 * 60))
            },
            {
                CycleStatus.VacForMelting,
                (() => CycleStatus.DilutionVat,
                10,
                (11 * 60, 1 * 60))
            },
            {
                CycleStatus.DilutionVat,
                (() => CycleStatus.Melting,
                5,
                (2 * 60, 1 * 60))
            },
            {
                CycleStatus.Melting,
                (() => CycleStatus.BringShrinkageCavity,
                60,
                (40 * 60, 30 * 60))
            },
            {
                CycleStatus.BringShrinkageCavity,
                (() => CycleStatus.CoolingIngot,
                15,
                (5 * 60, 3 * 60))
            },
            {
                CycleStatus.CoolingIngot,
                (() => CycleStatus.EndTechCycle,
                30,
                (20 * 60, 10 * 60))
            },
            {
                CycleStatus.VacForMeltingScarp,
                (() => CycleStatus.MeltingScarp,
                10,
                (11 * 60, 1 * 60))
            },
            {
                CycleStatus.MeltingScarp,
                (() => CycleStatus.CoolingMeltingScarp,
                20,
                (4 * 60, 3 * 60))
            },
            {
                CycleStatus.CoolingMeltingScarp,
                (() => CycleStatus.LoadUnload,
                15,
                (4 * 60, 3 * 60))
            },
        };

        public static CycleStatus GetNextCycle(CycleStatus currCycle)
        {
            CycleStatus nextCycle = CycleStatus.EndTechCycle;
            if(genDataMap.TryGetValue(currCycle, out var data))
            {
                nextCycle = data.NextState();
            }
            return nextCycle;
        }

        public static int GetDuration(CycleStatus currCycle)
        {
            int duration = 15;
            if (genDataMap.TryGetValue(currCycle, out var data))
            {
                duration = data.Duration;
            }
            return duration;
        }

        public static int GetDeviation(CycleStatus currCycle)
        {
            int deviation = random.Next(7 * 60) - (5 * 60);
            if (genDataMap.TryGetValue(currCycle, out var data))
            {
                deviation = random.Next(data.Item3.min) - data.Item3.offset;
            }
            return deviation;
        }
    }
}