"""
ANSI utilities for FZF preview scripts.

Lightweight stdlib-only utilities to replace Rich dependency in preview scripts.
Provides RGB color formatting, table rendering, and markdown stripping.
"""

import re
import shutil
import textwrap


def rgb_color(r: int, g: int, b: int, text: str, bold: bool = False) -> str:
    """
    Format text with RGB color using ANSI escape codes.

    Args:
        r: Red component (0-255)
        g: Green component (0-255)
        b: Blue component (0-255)
        text: Text to colorize
        bold: Whether to make text bold

    Returns:
        ANSI-escaped colored text
    """
    color_code = f"\x1b[38;2;{r};{g};{b}m"
    bold_code = "\x1b[1m" if bold else ""
    reset = "\x1b[0m"
    return f"{color_code}{bold_code}{text}{reset}"


def parse_color(color_csv: str) -> tuple[int, int, int]:
    """
    Parse RGB color from comma-separated string.

    Args:
        color_csv: Color as 'R,G,B' string

    Returns:
        Tuple of (r, g, b) integers
    """
    parts = color_csv.split(",")
    return int(parts[0]), int(parts[1]), int(parts[2])


def print_rule(sep_color: str) -> None:
    """
    Print a horizontal rule line.

    Args:
        sep_color: Color as 'R,G,B' string
    """
    width = shutil.get_terminal_size((80, 24)).columns
    r, g, b = parse_color(sep_color)
    print(rgb_color(r, g, b, "─" * width))


def print_table_row(
    key: str, value: str, header_color: str, key_width: int, value_width: int
) -> None:
    """
    Print a two-column table row with left-aligned key and right-aligned value.

    Args:
        key: Left column text (header/key)
        value: Right column text (value)
        header_color: Color for key as 'R,G,B' string
        key_width: Width for key column
        value_width: Width for value column
    """
    r, g, b = parse_color(header_color)
    key_styled = rgb_color(r, g, b, key, bold=True)

    # Get actual terminal width
    term_width = shutil.get_terminal_size((80, 24)).columns

    # Calculate actual value width based on terminal and key
    actual_value_width = max(20, term_width - len(key) - 2)

    # Wrap value if it's too long
    value_lines = textwrap.wrap(str(value), width=actual_value_width) if value else [""]

    if not value_lines:
        value_lines = [""]

    # Print first line with properly aligned value
    first_line = value_lines[0]
    # Use manual spacing to right-align
    spacing = term_width - len(key) - len(first_line) - 2
    if spacing > 0:
        print(f"{key_styled}  {' ' * spacing}{first_line}")
    else:
        print(f"{key_styled}  {first_line}")

    # Print remaining wrapped lines (left-aligned, indented)
    for line in value_lines[1:]:
        print(f"{' ' * (len(key) + 2)}{line}")


def strip_markdown(text: str) -> str:
    """
    Strip markdown formatting from text.

    Removes:
    - Headers (# ## ###)
    - Bold (**text** or __text__)
    - Italic (*text* or _text_)
    - Links ([text](url))
    - Code blocks (```code```)
    - Inline code (`code`)

    Args:
        text: Markdown-formatted text

    Returns:
        Plain text with markdown removed
    """
    if not text:
        return ""

    # Remove code blocks first
    text = re.sub(r"```[\s\S]*?```", "", text)

    # Remove inline code
    text = re.sub(r"`([^`]+)`", r"\1", text)

    # Remove headers
    text = re.sub(r"^#{1,6}\s+", "", text, flags=re.MULTILINE)

    # Remove bold (** or __)
    text = re.sub(r"\*\*(.+?)\*\*", r"\1", text)
    text = re.sub(r"__(.+?)__", r"\1", text)

    # Remove italic (* or _)
    text = re.sub(r"\*(.+?)\*", r"\1", text)
    text = re.sub(r"_(.+?)_", r"\1", text)

    # Remove links, keep text
    text = re.sub(r"\[(.+?)\]\(.+?\)", r"\1", text)

    # Remove images
    text = re.sub(r"!\[.*?\]\(.+?\)", "", text)

    return text.strip()


def wrap_text(text: str, width: int | None = None) -> str:
    """
    Wrap text to terminal width.

    Args:
        text: Text to wrap
        width: Width to wrap to (defaults to terminal width)

    Returns:
        Wrapped text
    """
    if width is None:
        width = shutil.get_terminal_size((80, 24)).columns

    return textwrap.fill(text, width=width)