"""
bal.gui.qt.theme
================

Pure presentation helpers for the Qt layer.

This is where colours and other look-and-feel decisions live, kept apart from
the core inheritance logic.  In particular it hosts :func:`status_color`, which
used to be ``WillItem.get_color()`` inside ``will.py``.

The status flags themselves are computed by the core layer
(:class:`bal.core.will.WillItem`); this module only translates a will item's
status into a colour for the transaction list / detail views.
"""

# Status -> hex colour.  The first matching status (checked in priority order)
# wins.  These are exactly the colours the original ``WillItem.get_color`` used,
# so the GUI looks identical after the refactor.
#
# The order matters: e.g. an INVALIDATED tx must show orange even if it also
# carries other flags, so INVALIDATED is checked before everything else.
_STATUS_COLOR_PRIORITY = (
    ("INVALIDATED", "#f87838"),  # orange  - tx can no longer be mined
    ("REPLACED", "#ff97e9"),     # pink    - superseded by another tx
    ("CONFIRMED", "#bfbfbf"),    # grey    - already mined
    ("PENDING", "#ffce30"),      # yellow  - in mempool, waiting
)

# Default colour used when no status in the priority list matches.
_DEFAULT_COLOR = "#ffffff"


def status_color(will_item) -> str:
    """Return the display colour (``"#rrggbb"``) for a :class:`WillItem`.

    This is a faithful, behaviour-preserving port of the old
    ``WillItem.get_color()`` method.  The slightly irregular handling of the
    push/check states (which is not a simple priority list) is reproduced
    exactly as in the original code.
    """
    # First, the simple priority-ordered statuses.
    for status, color in _STATUS_COLOR_PRIORITY:
        if will_item.get_status(status):
            return color

    # The remaining states need the original branching because of the
    # CHECK_FAIL / CHECKED interaction.
    if will_item.get_status("CHECK_FAIL") and not will_item.get_status("CHECKED"):
        return "#e83845"  # red - server check failed
    elif will_item.get_status("CHECKED"):
        return "#8afa6c"  # green - server confirmed it stored the tx
    elif will_item.get_status("PUSH_FAIL"):
        return "#e83845"  # red - failed to push to will-executor
    elif will_item.get_status("PUSHED"):
        return "#73f3c8"  # teal - pushed to will-executor
    elif will_item.get_status("COMPLETE"):
        return "#2bc8ed"  # blue - signed
    else:
        return _DEFAULT_COLOR