"""
The Interiors pack's hall as a unit, shortened and made to fit a hull.

In the demo the hall is four 6.7 m bays long (a raised pad with a door at each end, a sunken floor between), 15.8 m
wide inside, with machine alcoves outside its long walls (fans, tanks, pipes: 2 to 4.5 m deep). Only its flush
wall bays fit the vessel, so:
  * one middle bay is taken out (pad, middle, pad: 20.1 m);
  * every alcove and everything behind the wall line is left out;
  * the middle bay keeps the pack's flush "gate" wall on both sides; the pad bays get the pack's window wall with
    a plain back panel 0.5 m behind the glass instead of an alcove.

Frame of the returned unit: origin on the hall's EAST door plane at threshold level, the hall lies along -X.
"""
from mathutils import Matrix

from units import Demo, Item, Unit, frame

WHITE_MAP = "ModSci_Engineer__Example_Dynamic_White"
E_DOOR = (-42.65, -15.6)
Z_DOOR = 0.2
BAY_H = 6.7
HALF = 8.05                     # everything of the hall body lies within this distance of its axis
LENGTH_4 = 27.55                # door plane to door plane, four bays

ALCOVE_PREFIX = ("SM_WVB_", "SM_WVC_", "SM_WVA_Fan", "SM_WVA_Floor", "SM_WVA_Ceiling_B", "SM_WVA_Wall_A", "SM_WVA_Wall_B")
WINDOW_PREFIX = ("SM_WVA_MainWall", "SM_WVA_LowerWall", "SM_WVA_Wall_End_A", "SM_WVA_Ceiling_A")


def build_hall(demo=None, props="all", loose=()):
    """Three-bay hall. props: "all" | "tidy" (names in `loose` left out) | "bare" (kit structure of the Interiors pack,
    lights and lettering only)."""
    demo = demo or Demo(WHITE_MAP)
    f = frame(E_DOOR[0], E_DOOR[1], Z_DOOR, 0.0)

    def pred(it, p):
        if not (-LENGTH_4 - 0.5 <= p.x <= 0.45 and abs(p.y) <= HALF):
            return False
        if it.kind == "mesh" and it.name.startswith(ALCOVE_PREFIX):
            return False
        return True

    src = demo.unit(f, pred)
    # bays from the east: E (-7.05, -0.35), 3 (-13.75, -7.05), 2 (-20.45, -13.75), W (-27.15, -20.45)
    x3a, x3b = -DOOR_GAP_H - 2 * BAY_H, -DOOR_GAP_H - BAY_H
    items = []
    for it in src.items:
        x = it.center.x
        if x3a - 1e-3 <= x < x3b - 1e-3:
            continue                                            # the middle bay that is taken out
        if props != "all" and it.kind == "mesh":
            interiors = it.key.split("/")[2] == "ModSciInteriors"
            if props == "bare" and not interiors:
                continue
            if props == "tidy" and it.name in loose:
                continue
        items.append(it.moved(Matrix.Translation((BAY_H, 0, 0))) if x < x3a - 1e-3 else it)
    # bays now: E (-7.05, -0.35), C (-13.75, -7.05), W (-20.45, -13.75); west door plane at -20.85
    def in_bay(it, lo, hi):
        return lo <= it.center.x < hi

    xe, xc, xw = (-DOOR_GAP_H - BAY_H, -DOOR_GAP_H), (-DOOR_GAP_H - 2 * BAY_H, -DOOR_GAP_H - BAY_H), (-DOOR_GAP_H - 3 * BAY_H, -DOOR_GAP_H - 2 * BAY_H)
    extra = []
    for sgn in (1, -1):
        def on_side(it):
            return it.center.y * sgn > 7.2

        window_w = [it for it in items if it.kind == "mesh" and on_side(it) and in_bay(it, *xw) and it.name.startswith(WINDOW_PREFIX)]
        window_e = [it for it in items if it.kind == "mesh" and on_side(it) and in_bay(it, *xe) and it.name.startswith(WINDOW_PREFIX)]
        if not any(it.name == "SM_WVA_MainWall" for it in window_e) and window_w:
            extra += [it.moved(Matrix.Translation((2 * BAY_H, 0, 0))) for it in window_w]
        elif not any(it.name == "SM_WVA_MainWall" for it in window_w) and window_e:
            extra += [it.moved(Matrix.Translation((-2 * BAY_H, 0, 0))) for it in window_e]
        back = [it for it in items if it.kind == "mesh" and on_side(it) and in_bay(it, *xc) and it.name == "SM_WVD_Wall_C"]
        for b in back:
            extra.append(b.moved(Matrix.Translation((BAY_H, 0, 0))))
            extra.append(b.moved(Matrix.Translation((-BAY_H, 0, 0))))
    return Unit(items + extra)


DOOR_GAP_H = 0.35
LENGTH_3 = 3 * BAY_H + 2 * DOOR_GAP_H + 0.05          # 20.85: east door plane to west door plane of the 3-bay hall