"""Tiger: quick look from other sides (headless): side, top, front, rear three-quarter, under, and a hero view, in the studio.

blender.exe -b Tender_Tiger.blend -t 0 --python build/tg_views.py -- TAG [samples]   -> previews/<TAG>_<view>.png, <TAG>_sheet.png
"""
import bpy
import math
import os
import sys
from mathutils import Vector

HERE = os.path.dirname(os.path.abspath(__file__))
ROOT = os.path.dirname(HERE)
args = sys.argv[sys.argv.index("--") + 1:] if "--" in sys.argv else []
TAG = args[0] if args else "v"
SAMPLES = int(args[1]) if len(args) > 1 else 32
sc = bpy.context.scene
sc.render.engine = 'CYCLES'
sc.cycles.samples = SAMPLES
sc.cycles.use_denoising = True
try:
    prefs = bpy.context.preferences.addons['cycles'].preferences
    for kind in ('OPTIX', 'CUDA', 'HIP', 'ONEAPI'):
        try:
            prefs.compute_device_type = kind
        except Exception:
            continue
        prefs.refresh_devices()
        if any(d.type == kind for d in prefs.devices):
            for d in prefs.devices:
                d.use = d.type == kind
            sc.cycles.device = 'GPU'
            break
except Exception as ex:
    print("GPU not set", ex)
sc.view_settings.view_transform = 'Standard'
cd = bpy.data.cameras.new("_views")
cam = bpy.data.objects.new("_views", cd)
sc.collection.objects.link(cam)
sc.camera = cam
sc.render.resolution_x, sc.render.resolution_y = 900, 600
C = Vector((0.0, 1.2, -0.1))
SHOTS = {"side": ((14.0, 1.2, 0.2), 'ORTHO', 8.5), "top": ((0.0, 1.2, 14.0), 'ORTHO', 8.5),
         "front": ((0.0, -14.0, 0.0), 'ORTHO', 5.0), "rear34": ((-7.5, 9.5, 3.0), 'PERSP', 50),
         "under": ((5.0, -2.0, -8.0), 'PERSP', 50), "hero": ((-8.0, -7.5, 3.5), 'PERSP', 50)}
paths = []
for name, (loc, kind, val) in SHOTS.items():
    cam.location = loc
    tgt = C if kind == 'PERSP' else Vector((loc[0] * 0 + (C.x if name != "front" else 0), C.y if name != "front" else 0, C.z))
    if name == "top":
        cam.rotation_euler = (0, 0, math.radians(90))
    else:
        cam.rotation_euler = (Vector(tgt) - Vector(loc)).to_track_quat('-Z', 'Z').to_euler()
    cd.type = kind
    if kind == 'ORTHO':
        cd.ortho_scale = val
    else:
        cd.lens = val
    sc.render.filepath = os.path.join(ROOT, "previews", "%s_%s.png" % (TAG, name))
    bpy.ops.render.render(write_still=True)
    paths.append(sc.render.filepath)
print("VIEWS OK", paths)