""" Generate Default.sublime-keymap """
import json
import pathlib
import string
import sys

sys.path.insert(0, str(pathlib.Path(__file__).parent.parent))

from vterm.keys import _MODIFIABLE_CSI

# "setting.x" is evaluated natively by sublime; a plugin on_query_context would
# cost an IPC round trip on every keystroke in every view
CTX = [{"key": "setting.vterm_view"}]
ESCAPE_CTX = [
    {"key": "setting.vterm_view"},
    {"key": "setting.vterm_view.finished", "operator": "not_equal", "operand": True},
    {"key": "overlay_visible", "operator": "equal", "operand": False},
    {"key": "popup_visible", "operator": "equal", "operand": False},
]

# derived from keys.py so a key added there cannot silently lack a binding
NAV_KEYS = list(_MODIFIABLE_CSI)
MODS = ["ctrl", "alt", "shift", "ctrl+shift", "alt+shift", "ctrl+alt"]


def binding(keys, key, context=None, **flags):
    args = {"key": key}
    args.update(flags)
    return {
        "keys": [keys],
        "command": "vterm_keypress",
        "args": args,
        "context": context or CTX,
    }


def mod_flags(mod):
    return {m: True for m in mod.split("+")}


entries = []

# printable characters: bound like any other key so nothing is ever inserted into
# the view. Uppercase must be a literal ("A", not shift+a): get_key_code returns
# lowercase for the shift+ form. on_modified still covers IME and composed input.
for c in string.ascii_lowercase + string.ascii_uppercase + string.digits + string.punctuation:
    entries.append(binding(c, c))
entries.append(binding("space", "space"))

for key in ["enter", "tab", "backspace"] + NAV_KEYS:
    entries.append(binding(key, key))
entries.append(binding("escape", "escape", context=ESCAPE_CTX))

for i in range(1, 13):
    entries.append(binding("f{}".format(i), "f{}".format(i)))

for mod in MODS:
    for key in NAV_KEYS:
        entries.append(binding("{}+{}".format(mod, key), key, **mod_flags(mod)))

for key in ["enter", "backspace", "tab"]:
    for mod in ["ctrl", "alt", "shift"]:
        entries.append(binding("{}+{}".format(mod, key), key, **mod_flags(mod)))

for c in "abcdefghijklmnopqrstuvwxyz":
    entries.append(binding("ctrl+{}".format(c), c, ctrl=True))
    entries.append(binding("alt+{}".format(c), c, alt=True))

for c in ["`", "[", "]", "\\", "space", "_", "^", "/", "@"]:
    entries.append(binding("ctrl+{}".format(c if c != " " else "space"), c, ctrl=True))

# plugin-command bindings (everything above sends keys to the pty)
entries.append({
    "keys": ["super+shift+k"],
    "command": "vterm_clear_screen",
    "context": CTX,
})

# one binding per line: indented JSON turns 150 bindings into 2000+ lines
lines = ["[", "  // generated by tools/gen_keymap.py - do not edit by hand"]
lines += ["  " + json.dumps(e, separators=(", ", ": ")) + "," for e in entries]
lines[-1] = lines[-1].rstrip(",")
lines.append("]")

path = pathlib.Path(__file__).parent.parent / "Default.sublime-keymap"
path.write_text("\n".join(lines) + "\n", encoding="utf-8")
print("wrote {} bindings to {}".format(len(entries), path))