#!/usr/bin/env python3
"""Generate synth.pd programmatically."""
from pathlib import Path

SCRIPT_DIR = Path(__file__).resolve().parent
OUTPUT = SCRIPT_DIR.parent / "pd" / "synth.pd"

def connect(c, src, sout, dst, din):
    c.append((src, sout, dst, din))

def obj(o, x, y, *args):
    idx = len(o)
    o.append((x, y, "obj", *args))
    return idx

def gen():
    o = []  # objects
    c = []  # connections

    def Obj(x, y, *args):
        return obj(o, x, y, *args)

    # ── ALSA MIDI input (gadget mode) ──
    notein = Obj(20, 20, "notein")
    pack_note = Obj(80, 50, "pack 0 0")
    unpack_note = Obj(80, 80, "unpack 0 0")
    s_pitch_n = Obj(20, 110, "s midi-pitch")
    s_vel_n = Obj(80, 110, "s midi-vel")
    connect(c, notein, 0, pack_note, 0)
    connect(c, notein, 1, pack_note, 1)
    connect(c, pack_note, 0, unpack_note, 0)
    connect(c, unpack_note, 0, s_pitch_n, 0)
    connect(c, unpack_note, 1, s_vel_n, 0)

    # ── UDP MIDI input (host mode via midi-bridge) ──
    net = Obj(400, 20, "netreceive -u 8081")
    route_midi = Obj(400, 60, "route midi")
    route_note = Obj(400, 100, "route 144 128")
    unpack2_on = Obj(400, 140, "unpack 0 0")
    unpack2_off = Obj(480, 140, "unpack 0 0")
    s_pitch_u = Obj(400, 180, "s midi-pitch")
    s_vel_u = Obj(480, 180, "s midi-vel")
    connect(c, net, 0, route_midi, 0)
    connect(c, route_midi, 0, route_note, 0)
    connect(c, route_note, 0, unpack2_on, 0)
    connect(c, route_note, 1, unpack2_off, 0)
    connect(c, unpack2_on, 0, s_pitch_u, 0)
    connect(c, unpack2_on, 1, s_vel_u, 0)
    connect(c, unpack2_off, 0, s_pitch_u, 0)
    connect(c, unpack2_off, 1, s_vel_u, 0)

    # ── Synth voice ──
    r_vel = Obj(20, 160, "r midi-vel")
    r_pitch = Obj(20, 190, "r midi-pitch")
    strip = Obj(20, 220, "stripnote")
    mtof = Obj(20, 260, "mtof")
    env = Obj(20, 290, "env~ 50 200 0.7 400")
    osc1 = Obj(140, 260, "osc~")
    mul1 = Obj(140, 290, "*~ 0.3")
    osc2 = Obj(220, 260, "osc~")
    mul2 = Obj(220, 290, "*~ 0.3")
    sum = Obj(180, 330, "+~")
    scale = Obj(180, 360, "*~ 0.5")
    filt = Obj(180, 400, "lop~")
    amp = Obj(180, 460, "*~")
    panscale = Obj(320, 460, "*~")
    dac = Obj(250, 530, "dac~")

    connect(c, r_vel, 0, strip, 1)
    connect(c, r_pitch, 0, strip, 0)
    connect(c, strip, 0, mtof, 0)
    connect(c, mtof, 0, osc1, 0)
    connect(c, mtof, 0, osc2, 0)
    connect(c, osc1, 0, mul1, 0)
    connect(c, osc2, 0, mul2, 0)
    connect(c, mul1, 0, sum, 0)
    connect(c, mul2, 0, sum, 1)
    connect(c, sum, 0, scale, 0)
    connect(c, scale, 0, filt, 0)
    connect(c, filt, 0, amp, 0)
    connect(c, strip, 0, env, 0)
    connect(c, env, 0, amp, 1)
    connect(c, amp, 0, panscale, 0)

    # ── Controls (headless-safe: loadbang-initialized floats, not hsl) ──
    lb_cut = Obj(350, 300, "loadbang")
    float_cut = Obj(350, 320, "float 10000")
    connect(c, lb_cut, 0, float_cut, 0)
    connect(c, float_cut, 0, filt, 1)

    lb_vol = Obj(350, 400, "loadbang")
    float_vol = Obj(350, 420, "float 80")
    div = Obj(350, 450, "/ 100")
    connect(c, lb_vol, 0, float_vol, 0)
    connect(c, float_vol, 0, div, 0)
    connect(c, div, 0, panscale, 1)

    # ── Output ──
    connect(c, panscale, 0, dac, 0)
    connect(c, panscale, 0, dac, 1)

    # ── Write ──
    lines = [
        "#N canvas 0 0 900 550 10;",
        "# DO NOT EDIT — generated by scripts/gen_synth_pd.py;",
    ]
    for x, y, t, *args in o:
        joined = " ".join(str(a) for a in args)
        lines.append(f"#X obj {x} {y} {joined};")
    for src, sout, dst, din in c:
        lines.append(f"#X connect {src} {sout} {dst} {din};")
    lines.append("")
    return "\n".join(lines)

if __name__ == "__main__":
    content = gen()
    OUTPUT.parent.mkdir(parents=True, exist_ok=True)
    OUTPUT.write_text(content)
    print(f"Wrote {OUTPUT}")
    # Print connections for debugging
    for line in content.splitlines():
        if line.startswith("#X connect"):
            print(f"  {line}")