using System.Collections.Generic;
using System.Linq;
using System.Text.Json.Serialization;

namespace GeViSetEditor.Core.Models
{
    /// <summary>
    /// Enhanced representation of .set file with full configuration structure
    /// Preserves original binary data while exposing parsed configuration
    /// </summary>
    public class EnhancedSetFile
    {
        /// <summary>
        /// Complete original file data - preserved for round-trip
        /// </summary>
        [JsonIgnore]
        public byte[] OriginalData { get; set; }

        /// <summary>
        /// File size in bytes
        /// </summary>
        [JsonPropertyName("fileSize")]
        public int FileSize { get; set; }

        /// <summary>
        /// Header string (usually "GeViSoft Parameters")
        /// </summary>
        [JsonPropertyName("header")]
        public string Header { get; set; } = "";

        /// <summary>
        /// Configuration items (key-value pairs)
        /// </summary>
        [JsonPropertyName("configItems")]
        public List<ConfigItemEntry> ConfigItems { get; set; } = new();

        /// <summary>
        /// Action mappings (trigger -> action rules)
        /// </summary>
        [JsonPropertyName("actionMappings")]
        public List<ActionMappingEntry> ActionMappings { get; set; } = new();

        /// <summary>
        /// Section names found in the file
        /// </summary>
        [JsonPropertyName("sectionNames")]
        public List<SectionNameEntry> SectionNames { get; set; } = new();

        /// <summary>
        /// Statistics about the parsed configuration
        /// </summary>
        [JsonPropertyName("statistics")]
        public ConfigStatistics Statistics => new ConfigStatistics
        {
            TotalConfigItems = ConfigItems.Count,
            TotalActionMappings = ActionMappings.Count,
            TotalSectionNames = SectionNames.Count,
            TotalActions = ActionMappings.Sum(m => m.Actions.Count),

            ConfigItemsByType = ConfigItems
                .GroupBy(i => i.ValueType)
                .ToDictionary(g => g.Key, g => g.Count()),

            ActionsPerMapping = ActionMappings
                .GroupBy(m => m.Actions.Count)
                .OrderBy(g => g.Key)
                .ToDictionary(g => g.Key, g => g.Count())
        };

        /// <summary>
        /// Get a clean copy of the original data for writing
        /// </summary>
        public byte[] GetDataForWriting()
        {
            byte[] copy = new byte[OriginalData.Length];
            System.Array.Copy(OriginalData, copy, OriginalData.Length);
            return copy;
        }
    }

    /// <summary>
    /// Configuration item (key-value pair)
    /// </summary>
    public class ConfigItemEntry
    {
        [JsonPropertyName("fileOffset")]
        public int FileOffset { get; set; }

        [JsonPropertyName("key")]
        public string Key { get; set; } = "";

        [JsonPropertyName("value")]
        public object Value { get; set; }

        [JsonPropertyName("valueType")]
        public string ValueType { get; set; } = "";
    }

    /// <summary>
    /// Section name found in the file
    /// </summary>
    public class SectionNameEntry
    {
        [JsonPropertyName("fileOffset")]
        public int FileOffset { get; set; }

        [JsonPropertyName("name")]
        public string Name { get; set; } = "";
    }

    /// <summary>
    /// Statistics about parsed configuration
    /// </summary>
    public class ConfigStatistics
    {
        [JsonPropertyName("totalConfigItems")]
        public int TotalConfigItems { get; set; }

        [JsonPropertyName("totalActionMappings")]
        public int TotalActionMappings { get; set; }

        [JsonPropertyName("totalSectionNames")]
        public int TotalSectionNames { get; set; }

        [JsonPropertyName("totalActions")]
        public int TotalActions { get; set; }

        [JsonPropertyName("configItemsByType")]
        public Dictionary<string, int> ConfigItemsByType { get; set; } = new();

        [JsonPropertyName("actionsPerMapping")]
        public Dictionary<int, int> ActionsPerMapping { get; set; } = new();
    }
}