// WeatherSetupProbe — Issue #26: dump weather Setups (0x02000BA6, 0x02000588, 0x02000589)
// to determine if any contain a small near-camera billboard / particle layer.
using System;
using System.IO;
using System.Linq;
using System.Numerics;
using DatReaderWriter;
using DatReaderWriter.DBObjs;
using DatReaderWriter.Enums;
using DatReaderWriter.Options;
using DatReaderWriter.Types;
using SysEnv = System.Environment;

string datDir = SysEnv.GetEnvironmentVariable("ACDREAM_DAT_DIR")
    ?? Path.Combine(SysEnv.GetFolderPath(SysEnv.SpecialFolder.UserProfile),
                    "Documents", "Asheron's Call");
Console.WriteLine($"datDir = {datDir}");
using var dats = new DatCollection(datDir, DatAccessType.Read);

uint[] setupIds = { 0x02000BA6u, 0x02000588u, 0x02000589u };
foreach (uint sid in setupIds) ProbeSetup(dats, sid);
return 0;

static void ProbeSetup(DatCollection dats, uint sid)
{
    Console.WriteLine();
    Console.WriteLine($"================ Setup 0x{sid:X8} ================");
    if (!dats.TryGet<Setup>(sid, out var s) || s is null)
    {
        Console.WriteLine("  (NOT FOUND)");
        return;
    }
    Console.WriteLine($"  Flags={s.Flags} NumParts={s.NumParts}");
    Console.WriteLine($"  Setup Height={s.Height:F3} Radius={s.Radius:F3}");
    Console.WriteLine($"  SortingSphere center=({s.SortingSphere.Origin.X:F2},{s.SortingSphere.Origin.Y:F2},{s.SortingSphere.Origin.Z:F2}) r={s.SortingSphere.Radius:F3}");
    Console.WriteLine($"  SelectionSphere center=({s.SelectionSphere.Origin.X:F2},{s.SelectionSphere.Origin.Y:F2},{s.SelectionSphere.Origin.Z:F2}) r={s.SelectionSphere.Radius:F3}");
    Console.WriteLine($"  HoldingLocations={s.HoldingLocations.Count} ConnectionPoints={s.ConnectionPoints.Count} PlacementFrames={s.PlacementFrames.Count} Lights={s.Lights.Count}");
    Console.WriteLine($"  DefaultAnimation=0x{(uint)s.DefaultAnimation:X8} DefaultScript=0x{(uint)s.DefaultScript:X8} DefaultMotionTable=0x{(uint)s.DefaultMotionTable:X8}");

    // PlacementFrames: typically Placement.Default has the per-part frames.
    AnimationFrame? defaultFrame = null;
    foreach (var kv in s.PlacementFrames)
    {
        Console.WriteLine($"  Placement[{kv.Key}]: Frames={kv.Value.Frames.Count} Hooks={kv.Value.Hooks.Count}");
        if (defaultFrame is null) defaultFrame = kv.Value;
        if (kv.Key == Placement.Default) defaultFrame = kv.Value;
    }

    for (int pi = 0; pi < s.Parts.Count; pi++)
    {
        uint partGid = (uint)s.Parts[pi];
        uint parent = (s.Flags.HasFlag(SetupFlags.HasParent) && pi < s.ParentIndex.Count) ? s.ParentIndex[pi] : 0xFFFFFFFFu;
        Vector3 scale = (s.Flags.HasFlag(SetupFlags.HasDefaultScale) && pi < s.DefaultScale.Count) ? s.DefaultScale[pi] : new Vector3(1, 1, 1);
        Frame? frame = (defaultFrame is not null && pi < defaultFrame.Frames.Count) ? defaultFrame.Frames[pi] : null;
        string frameStr = frame is null ? "(no-frame)"
            : $"pos=({frame.Origin.X:F2},{frame.Origin.Y:F2},{frame.Origin.Z:F2}) ori=({frame.Orientation.W:F3},{frame.Orientation.X:F3},{frame.Orientation.Y:F3},{frame.Orientation.Z:F3})";
        string parentStr = parent == 0xFFFFFFFFu ? "ROOT" : parent.ToString();
        Console.WriteLine($"  Part[{pi}] GfxObj=0x{partGid:X8} parent={parentStr} scale=({scale.X:F2},{scale.Y:F2},{scale.Z:F2}) {frameStr}");
        DumpGfxObj(dats, partGid, "      ");
    }
}

static void DumpGfxObj(DatCollection dats, uint gid, string indent)
{
    if (!dats.TryGet<GfxObj>(gid, out var g) || g is null)
    {
        Console.WriteLine($"{indent}GfxObj 0x{gid:X8} NOT FOUND");
        return;
    }
    int triCount = g.Polygons.Count;
    int physTri = g.PhysicsPolygons.Count;
    int vertCount = g.VertexArray?.Vertices?.Count ?? 0;
    Vector3 mn = new(float.PositiveInfinity), mx = new(float.NegativeInfinity);
    if (g.VertexArray?.Vertices is not null)
    {
        foreach (var v in g.VertexArray.Vertices.Values)
        {
            mn = Vector3.Min(mn, v.Origin);
            mx = Vector3.Max(mx, v.Origin);
        }
    }
    Vector3 size = (vertCount > 0) ? (mx - mn) : Vector3.Zero;
    float radius = (vertCount > 0) ? size.Length() * 0.5f : 0f;
    string sizeTag = radius < 5 ? "  <<TINY"
                   : radius < 20 ? "  <<SMALL"
                   : radius < 200 ? "" : "  <<HUGE";
    Console.WriteLine($"{indent}GfxObj 0x{gid:X8} Flags={g.Flags} Surfaces={g.Surfaces.Count} RenderTris={triCount} PhysTris={physTri} Verts={vertCount}");
    if (vertCount > 0)
    {
        Console.WriteLine($"{indent}  bbox min=({mn.X:F2},{mn.Y:F2},{mn.Z:F2}) max=({mx.X:F2},{mx.Y:F2},{mx.Z:F2}) size=({size.X:F2},{size.Y:F2},{size.Z:F2}) r~{radius:F2}{sizeTag}");
        Console.WriteLine($"{indent}  SortCenter=({g.SortCenter.X:F2},{g.SortCenter.Y:F2},{g.SortCenter.Z:F2})");
        // billboard heuristic: 4 verts and 1-2 polygons
        if (vertCount <= 8 && triCount <= 4)
            Console.WriteLine($"{indent}  >>> BILLBOARD CANDIDATE (verts<=8, tris<=4)");
    }
    for (int si = 0; si < g.Surfaces.Count; si++)
    {
        uint surfId = (uint)g.Surfaces[si];
        if (!dats.TryGet<Surface>(surfId, out var surf) || surf is null)
        {
            Console.WriteLine($"{indent}  Surf[{si}]=0x{surfId:X8} (not found)");
            continue;
        }
        string tex = "solid";
        if (surf.Type.HasFlag(SurfaceType.Base1Image) || surf.Type.HasFlag(SurfaceType.Base1ClipMap))
        {
            uint stid = (uint)surf.OrigTextureId;
            if (stid != 0 && dats.TryGet<SurfaceTexture>(stid, out var st) && st is not null && st.Textures.Count > 0)
            {
                uint rsid = (uint)st.Textures[0];
                if (dats.TryGet<RenderSurface>(rsid, out var rs) && rs is not null)
                    tex = $"{rs.Width}x{rs.Height} {rs.Format} STex=0x{stid:X8}";
                else
                    tex = $"STex=0x{stid:X8} (rs miss)";
            }
            else tex = $"STex=0x{stid:X8}";
        }
        Console.WriteLine($"{indent}  Surf[{si}]=0x{surfId:X8} Type={surf.Type} Translucency={surf.Translucency:F3} Lum={surf.Luminosity:F3} Diffuse={surf.Diffuse:F3} {tex}");
    }
}