# ── Entry point ───────────────────────────────────────────────────────────────
label start:
    jump arrival


# ── Rewind mechanic (shared across all scripts) ──────────────────────────────
# Where the next rewind lands. Set this at every checkpoint you create.
default checkpoint = None

# Optional: a list of $-statements to run when rewinding (reset flags, etc.).
# Kept separate from `checkpoint` so the destination label stays a plain string.
default rewind_reset = []

# Plays the shared rewind effect, then returns to `destination`.
# Uses `call` (not `jump`) so it is re-entrant: rewinding to a label that is
# already on the call stack (e.g. back to a choice mid-spar) returns cleanly
# to the caller instead of corrupting the stack.
# Call as:  call rewind_to .some_label
label rewind_to(destination):
    scene black
    with dissolve
    show screen teal_wash
    "The world pulls back."
    "Colour drains to teal. Sound slows to nothing."
    hide screen teal_wash
    scene black
    with dissolve
    # Run any per-checkpoint reset statements (e.g. $ rewind_used = False)
    for _stmt in rewind_reset:
        $ eval(_stmt)
    call destination


# ── Screens ───────────────────────────────────────────────────────────────────

# Shared rewind prompt. "Rewind" jumps to .do_rewind, which reads the
# current `checkpoint` and routes through the reusable rewind_to label.
# "Continue" just hides the screen and lets the calling script resume.
screen rewind_prompt():
    zorder 10
    textbutton "⟲ Rewind" action Jump(".do_rewind"):
        xalign 0.05
        yalign 0.95
        size 22
        color "#4ab8b8"
    textbutton "Continue" action Hide("rewind_prompt"):
        xalign 0.05
        xoffset 120
        yalign 0.95
        size 22
        color "#4ab8b8"

# Reads the stored checkpoint and rewinds to it.
label .do_rewind:
    hide screen rewind_prompt
    if checkpoint is None:
        # No checkpoint set — just resume.
        return
    call rewind_to checkpoint

screen teal_wash():
    zorder 20
    add Solid("#1a4a4a") alpha 0.7