using System.Collections.Generic;
using Luneraria.Core;
using UnityEngine;

namespace Luneraria.UI
{
    /// <summary>Tooltip content (Godot: the dictionary with title, subtitle, stats, text, note, warn).</summary>
    public sealed class LuneTip
    {
        public string Title = "";
        public string Subtitle = "";
        public string Glyph = "";
        public Color? GlyphColor;
        /// <summary>Rows [glyph, name, value].</summary>
        public readonly List<string[]> Stats = new List<string[]>();
        public string Text = "";
        public string Note = "";
        public string Warn = "";

        public bool IsEmpty { get { return Title.Length == 0 && Subtitle.Length == 0 && Stats.Count == 0 && Text.Length == 0 && Note.Length == 0 && Warn.Length == 0; } }

        public LuneTip Stat(string glyph, string name, string value)
        {
            Stats.Add(new[] { glyph, name, value });
            return this;
        }

        /// <summary>Everything the tooltip shows, as one string (tests and change detection).</summary>
        public override string ToString()
        {
            var parts = new List<string> { Title, Subtitle };
            foreach (string[] row in Stats)
                parts.Add(row[1] + ": " + row[2]);
            parts.Add(Text);
            parts.Add(Note);
            parts.Add(Warn);
            return string.Join("\n", parts.FindAll(p => p.Length > 0));
        }
    }

    /// <summary>
    /// Display figures from the real unit definitions and combat rules (port of
    /// scripts/luneraria/ui/lune_stats.gd): damage per hit, one attack per second times the attack
    /// tempo bonus, range, armour and damage type with the damage matrix (LuneUnit.DamageMatrix).
    /// Nothing is invented; values are only formatted.
    /// </summary>
    public static class LuneStats
    {
        static readonly Dictionary<string, string> RoleNames = new Dictionary<string, string>
            { { "front", "Tank" }, { "melee", "Nahkampf" }, { "ranged", "Fernkampf" }, { "splash", "Flächenschaden" }, { "support", "Support" } };
        static readonly Dictionary<string, string> RoleGlyphs = new Dictionary<string, string>
            { { "front", "tank" }, { "melee", "melee" }, { "ranged", "ranged" }, { "splash", "splash" }, { "support", "support" } };

        public static string RoleName(string role)
        {
            return RoleNames.TryGetValue(role ?? "", out string name) ? name : role;
        }

        public static string RoleGlyph(string role)
        {
            return RoleGlyphs.TryGetValue(role ?? "", out string glyph) ? glyph : "melee";
        }

        static int Find(int attackType, double factor)
        {
            int row = GdMath.Clamp(attackType, 0, 2);
            for (int armor = 0; armor < 3; armor++)
            {
                if (LuneUnit.DamageMatrix[row, armor] == factor)
                    return armor;
            }
            return -1;
        }

        /// <summary>Armour class the damage type hits for 130 % (DamageMatrix).</summary>
        public static string StrongAgainst(int attackType)
        {
            return ContentData.ArmorNames[Find(attackType, 1.30)];
        }

        /// <summary>Armour class the damage type hits for 75 % (DamageMatrix).</summary>
        public static string WeakAgainst(int attackType)
        {
            return ContentData.ArmorNames[Find(attackType, 0.75)];
        }

        public static double HitDamage(UnitDef definition)
        {
            return definition.Damage * (1.0 + definition.DamageBonus);
        }

        public static double AttacksPerSecond(UnitDef definition)
        {
            return 1.0 + GdMath.Clamp(definition.AttackSpeedBonus, -.25, .5);
        }

        public static string ArmorName(int armorType)
        {
            return ContentData.ArmorNames[GdMath.Clamp(armorType, 0, 2)];
        }

        public static string DamageName(int attackType)
        {
            return ContentData.DamageNames[GdMath.Clamp(attackType, 0, 2)];
        }

        /// <summary>Stat rows [glyph, name, value] for tooltips and detail panels.</summary>
        public static List<string[]> Rows(UnitDef definition, bool withMove = false)
        {
            int attackType = definition.AttackType;
            double reduction = definition.ReductionBonus;
            var result = new List<string[]>
            {
                new[] { "heart", "Leben", LuneUiTheme.Number(definition.MaxHp) },
                new[] { "sword", "Schaden/Treffer", LuneUiTheme.Decimal(HitDamage(definition)) },
                new[] { "tempo", "Angriffstempo", LuneUiTheme.Decimal(AttacksPerSecond(definition), 2) + " /s" },
                new[] { "range", "Reichweite", LuneUiTheme.Decimal(definition.AttackRange) + " m" },
                new[] { "armor", "Rüstung", ArmorName(definition.ArmorType) + (reduction > 0.0 ? " · −" + LuneUiTheme.Round(reduction * 100.0) + " % Schaden" : "") },
                new[] { "splash", "Angriffsart", DamageName(attackType) + " · stark gegen " + StrongAgainst(attackType) },
            };
            if (withMove)
                result.Add(new[] { "move", "Lauftempo", LuneUiTheme.Decimal(definition.Speed) + " m/s" });
            if (definition.Regen > 0.0)
                result.Add(new[] { "heart", "Regeneration", LuneUiTheme.Decimal(definition.Regen * 100.0) + " % Leben/s" });
            if (definition.ItemSplash > 0.0)
                result.Add(new[] { "splash", "Splitter", LuneUiTheme.Round(definition.ItemSplash * 100.0) + " % an bis zu 2 Gegner" });
            return result;
        }

        /// <summary>Compact pairs [glyph, "Name Wert"] for narrow panels (two per row).</summary>
        public static List<string[]> ShortRows(UnitDef definition)
        {
            int attackType = GdMath.Clamp(definition.AttackType, 0, 2);
            return new List<string[]>
            {
                new[] { "heart", "Leben " + LuneUiTheme.Number(definition.MaxHp) },
                new[] { "sword", "Schaden " + LuneUiTheme.Decimal(HitDamage(definition)) },
                new[] { "tempo", "Tempo " + LuneUiTheme.Decimal(AttacksPerSecond(definition), 2) + "/s" },
                new[] { "range", "Reichweite " + LuneUiTheme.Decimal(definition.AttackRange) + " m" },
                new[] { "armor", "Rüstung " + ArmorName(definition.ArmorType) },
                new[] { "splash", DamageName(attackType) + " › " + StrongAgainst(attackType) },
            };
        }

        /// <summary>"Schaden pro Sekunde" from hit damage and tempo, without abilities or type modifiers.</summary>
        public static double Dps(UnitDef definition)
        {
            return HitDamage(definition) * AttacksPerSecond(definition);
        }

        /// <summary>Stage of a troop id: even numbers are the upgraded stage (g02, w04 …).</summary>
        public static int StageOf(string typeId)
        {
            int number = int.Parse(typeId.Substring(1));
            return number % 2 == 0 ? 2 : 1;
        }

        /// <summary>Tooltip content for a troop type (shop cards, army chips).</summary>
        public static LuneTip TroopTip(string typeId, string role, string extra = "")
        {
            UnitDef data = DataCatalog.GetUnit(typeId);
            string upgrade = data.UpgradeId ?? "";
            string note;
            if (upgrade.Length > 0)
            {
                UnitDef next = DataCatalog.GetUnit(upgrade);
                note = string.Format("Aufwertung: {0} für {1} Gold (Leben {2} → {3}, Schaden {4} → {5})", next.DisplayName, next.Cost,
                    LuneUiTheme.Number(data.MaxHp), LuneUiTheme.Number(next.MaxHp), LuneUiTheme.Decimal(data.Damage), LuneUiTheme.Decimal(next.Damage));
            }
            else
            {
                note = "Höchste Stufe.";
            }
            var tip = new LuneTip { Title = data.DisplayName, Glyph = RoleGlyph(role),
                Subtitle = string.Format("{0} · Stufe {1} · {2} Gold", RoleName(role), StageOf(typeId) == 2 ? "II" : "I", data.Cost),
                Text = data.AbilityDescription ?? "", Note = note, Warn = extra ?? "" };
            tip.Stats.AddRange(Rows(data));
            return tip;
        }
    }
}