"""
SURYA - Master Generation Script
Creates all track animations in a single Blender file with separate scenes,
then exports each scene as GLTF and Alembic.

Usage:
    /Applications/Blender.app/Contents/MacOS/Blender --background --python generate_all.py
"""

import bpy
import os
import sys

# Get the directory of this script
SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, SCRIPT_DIR)
sys.path.insert(0, os.path.join(SCRIPT_DIR, "tracks"))

from utils import *

# Import track modules
from tracks import track01_skin
from tracks import track02_u_saved_me
from tracks import track03_nothing
from tracks import track06_natures_call
from tracks import track08_idk
from tracks import track09_with_u
from tracks import track14_hollow


# Track configurations
TRACKS = [
    ("Track01_Skin", track01_skin.create_skin_animation),
    ("Track02_USavedMe", track02_u_saved_me.create_sacred_geometry_animation),
    ("Track03_Nothing", track03_nothing.create_nothing_animation),
    ("Track06_NaturesCall", track06_natures_call.create_natures_call_animation),
    ("Track08_IDK", track08_idk.create_idk_animation),
    ("Track09_WithU", track09_with_u.create_with_u_animation),
    ("Track14_Hollow", track14_hollow.create_hollow_animation),
]


def generate_all_scenes():
    """Generate all track scenes in a single Blender file."""
    print("=" * 60)
    print("SURYA - Blender Animation Generator")
    print("=" * 60)
    
    # Delete the default scene
    if "Scene" in bpy.data.scenes:
        default_scene = bpy.data.scenes["Scene"]
        if len(bpy.data.scenes) > 1:
            bpy.data.scenes.remove(default_scene)
    
    # Create each track scene
    for track_name, create_func in TRACKS:
        print(f"\nGenerating: {track_name}...")
        
        # Create new scene
        scene = bpy.data.scenes.new(track_name)
        bpy.context.window.scene = scene
        
        # Setup scene defaults
        scene.frame_start = 1
        scene.frame_end = TOTAL_FRAMES
        scene.render.fps = FPS
        scene.render.resolution_x = 1920
        scene.render.resolution_y = 1080
        
        # Create world for this scene
        world = bpy.data.worlds.new(f"{track_name}_World")
        scene.world = world
        world.use_nodes = True
        
        # Run the track creation function
        try:
            create_func()
            print(f"  ✓ {track_name} created successfully")
        except Exception as e:
            print(f"  ✗ Error creating {track_name}: {e}")
            import traceback
            traceback.print_exc()
    
    # Save the master blend file
    output_path = os.path.join(SCRIPT_DIR, "surya_all.blend")
    bpy.ops.wm.save_as_mainfile(filepath=output_path)
    print(f"\n✓ Saved master file: {output_path}")
    
    return output_path


def export_all_scenes():
    """Export each scene as GLTF and Alembic."""
    exports_dir = os.path.join(SCRIPT_DIR, "exports")
    os.makedirs(exports_dir, exist_ok=True)
    
    print("\n" + "=" * 60)
    print("Exporting scenes...")
    print("=" * 60)
    
    for scene in bpy.data.scenes:
        scene_name = scene.name
        print(f"\nExporting: {scene_name}...")
        
        # Set as active scene
        bpy.context.window.scene = scene
        
        # Select all objects in scene
        for obj in scene.objects:
            obj.select_set(True)
        
        # Export GLTF
        gltf_path = os.path.join(exports_dir, f"{scene_name}.gltf")
        try:
            bpy.ops.export_scene.gltf(
                filepath=gltf_path,
                export_format='GLTF_SEPARATE',
                export_animations=True,
                export_apply=False,
                export_texcoords=True,
                export_normals=True,
                export_materials='EXPORT',
                use_selection=False,
                export_extras=False,
                export_yup=True,
            )
            print(f"  ✓ GLTF: {gltf_path}")
        except Exception as e:
            print(f"  ✗ GLTF export failed: {e}")
        
        # Export Alembic
        abc_path = os.path.join(exports_dir, f"{scene_name}.abc")
        try:
            bpy.ops.wm.alembic_export(
                filepath=abc_path,
                start=scene.frame_start,
                end=scene.frame_end,
                export_hair=False,
                export_particles=False,
                flatten=False,
                selected=False,
                export_normals=True,
                export_uvs=True,
            )
            print(f"  ✓ Alembic: {abc_path}")
        except Exception as e:
            print(f"  ✗ Alembic export failed: {e}")
    
    print("\n" + "=" * 60)
    print("Export complete!")
    print("=" * 60)


def main():
    """Main entry point."""
    # Generate all scenes
    blend_path = generate_all_scenes()
    
    # Export all scenes
    export_all_scenes()
    
    # Print summary
    print("\n" + "=" * 60)
    print("SURYA GENERATION COMPLETE")
    print("=" * 60)
    print(f"\nBlend file: {blend_path}")
    print(f"Exports: {os.path.join(SCRIPT_DIR, 'exports')}/")
    print("\nGenerated tracks:")
    for track_name, _ in TRACKS:
        print(f"  - {track_name}")


if __name__ == "__main__":
    main()