#!/usr/bin/env python3
"""BiDi-safe box-drawing table renderer for mixed Hebrew/English terminal output.

Uses Unicode directional marks to prevent the BiDi algorithm from breaking
table alignment when Hebrew text is present.

Usage as module:
    from scripts.bidi_table import bidi_table
    print(bidi_table(['Col1', 'Col2'], [['val1', 'ערך2']]))

Usage from CLI:
    python3 scripts/bidi_table.py
"""

from __future__ import annotations

import re

LRM = "\u200E"  # Left-to-Right Mark
RLM = "\u200F"  # Right-to-Left Mark
LRE = "\u202A"  # Left-to-Right Embedding
PDF = "\u202C"  # Pop Directional Formatting

_HEB_RE = re.compile(r'[\u0590-\u05FF]')


def _has_hebrew(text: str) -> bool:
    return bool(_HEB_RE.search(text))


def bidi_table(headers: list[str], rows: list[list[str]]) -> str:
    """Render a box-drawing table safe for mixed RTL/LTR terminal display."""
    ncols = len(headers)

    # Calculate column widths (visual length, not counting bidi marks)
    col_widths = [len(h) for h in headers]
    for row in rows:
        for i, cell in enumerate(row[:ncols]):
            col_widths[i] = max(col_widths[i], len(cell))

    def hline(left: str, mid: str, right: str) -> str:
        return left + mid.join("─" * (w + 2) for w in col_widths) + right

    def dataline(cells: list[str]) -> str:
        parts = []
        for i in range(ncols):
            cell = cells[i] if i < len(cells) else ""
            padded = cell + " " * max(0, col_widths[i] - len(cell))
            # Wrap each cell: LRE forces left-to-right context for the cell,
            # so box-drawing chars stay in place. PDF closes the embedding.
            parts.append(LRE + " " + padded + " " + PDF)
        return LRM + "│" + ("│").join(parts) + "│"

    lines = [hline("┌", "┬", "┐")]
    lines.append(dataline(headers))
    lines.append(hline("├", "┼", "┤"))
    for row in rows:
        lines.append(dataline(row))
    lines.append(hline("└", "┴", "┘"))
    return "\n".join(lines)


if __name__ == "__main__":
    table = bidi_table(
        ["File", "Description", "Model", "Step"],
        [
            ["claims_extractor.py", "חילוץ טענות מכתבי טענות", "Sonnet", "שלב 3 — הבא בתור"],
            ["brainstorm.py", "סיעור מוחות — כיווני נימוק", "Sonnet", "שלב 4"],
            ["block_writer.py", "כתיבת בלוקים של החלטה", "Sonnet/Opus", "שלב 5"],
            ["qa_validator.py", "בדיקת איכות QA", "Sonnet", "שלב 6"],
            ["style_analyzer.py", "ניתוח סגנון דפנה", "Opus", "חד-פעמי"],
            ["learning_loop.py", "למידה מהחלטה סופית", "Sonnet", "סוף תהליך"],
        ],
    )
    print(table)