#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Fenrir TTY screen reader
# By Chrys, Storm Dragon, and contributors.

from fenrirscreenreader.core import debug
from fenrirscreenreader.core.i18n import _


class command:
    def __init__(self):
        pass

    def initialize(self, environment):
        self.env = environment

    def shutdown(self):
        pass

    def get_description(self):
        return "Detects progress patterns for progress bar monitoring"

    def run(self):
        # Only run if progress monitoring is enabled
        try:
            if (
                "progressMonitoring" in self.env["commandBuffer"]
                and self.env["commandBuffer"]["progressMonitoring"]
            ):
                # Check if current line is a prompt - if so, reset progress
                # state
                if self.is_current_line_prompt():
                    self.reset_progress_state()
                # Only check new incoming text (new_delta), but filter out
                # screen changes
                elif (
                    self.env["screen"]["new_delta"]
                    and self.is_real_progress_update()
                ):
                    self.detect_progress(self.env["screen"]["new_delta"])
        except Exception as e:
            # Silently ignore errors to avoid disrupting normal operation
            pass

    def is_real_progress_update(self):
        """Check if this is a real progress update vs screen change/window switch"""
        # If the screen/application changed, it's not a progress update
        if self.env["runtime"]["ScreenManager"].is_screen_change():
            return False

        # If there was a large cursor movement, it's likely navigation, not
        # progress
        if self.env["runtime"]["CursorManager"].is_cursor_vertical_move():
            x_move = abs(
                self.env["screen"]["new_cursor"]["x"]
                - self.env["screen"]["old_cursor"]["x"]
            )
            y_move = abs(
                self.env["screen"]["new_cursor"]["y"]
                - self.env["screen"]["old_cursor"]["y"]
            )
            # Large movements suggest navigation, not progress output
            if y_move > 2 or x_move > 20:
                return False

        # Check if delta is too large (screen change) vs small incremental
        # updates
        delta_length = len(self.env["screen"]["new_delta"])
        if (
            delta_length > 200
        ):  # Allow longer progress lines like Claude Code's status
            return False

        # Check if current line looks like a prompt - progress unlikely during
        # prompts
        if self.is_current_line_prompt():
            return False

        return True

    def reset_progress_state(self):
        """Reset progress state when a prompt is detected, allowing new progress operations to start fresh"""
        self.env["runtime"]["DebugManager"].write_debug_out(
            "Resetting progress state due to prompt detection",
            debug.DebugLevel.INFO,
        )
        self.env["commandBuffer"]["lastProgressValue"] = -1
        self.env["commandBuffer"]["lastProgressTime"] = 0

    def detect_progress(self, text):
        import re
        import time

        current_time = time.time()

        # Debug: Print what we're checking
        self.env["runtime"]["DebugManager"].write_debug_out(
            "Progress detector checking: '" + text + "'", debug.DebugLevel.INFO
        )

        # Filter out URLs to prevent false positives
        if self.contains_url(text):
            self.env["runtime"]["DebugManager"].write_debug_out(
                "Skipping progress detection - text contains URL", debug.DebugLevel.INFO
            )
            return

        # Note: Auto-disable on 100% completion removed to respect user
        # settings

        # Pattern 1: Percentage (50%, 25.5%, etc.)
        # Filter out common non-progress percentages (weather, system stats,
        # etc.)
        percent_match = re.search(r"(\d+(?:\.\d+)?)\s*%", text)
        if percent_match:
            percentage = float(percent_match.group(1))
            # Only trigger on realistic progress percentages (0-100%)
            if 0 <= percentage <= 100:
                # Filter out weather/system stats that contain percentages
                if not re.search(
                    r"\b(?:humidity|cpu|memory|disk|usage|temp|weather|forecast)\b",
                    text,
                    re.IGNORECASE,
                ):
                    self.env["runtime"]["DebugManager"].write_debug_out(
                        "found percentage: " + str(percentage),
                        debug.DebugLevel.INFO,
                    )
                    if (
                        percentage
                        != self.env["commandBuffer"]["lastProgressValue"]
                    ):
                        self.env["runtime"]["DebugManager"].write_debug_out(
                            "Playing tone for: " + str(percentage),
                            debug.DebugLevel.INFO,
                        )
                        self.play_progress_tone(percentage)
                        self.env["commandBuffer"][
                            "lastProgressValue"
                        ] = percentage
                        self.env["commandBuffer"][
                            "lastProgressTime"
                        ] = current_time
                    return

        # Pattern 1b: Time/token activity (not percentage-based, so use single
        # beep)
        time_match = re.search(r"(\d+)s\s", text)
        token_match = re.search(r"(\d+)\s+tokens", text)
        # Pattern 1c: dd command output (bytes copied with transfer rate)
        dd_match = re.search(r"\d+\s+bytes.*copied.*\d+\s+s.*[kMGT]?B/s", text)
        # Pattern 1d: Curl-style transfer data (bytes, speed indicators)
        curl_match = re.search(
            r"(\d+\s+\d+\s+\d+\s+\d+.*?(?:k|M|G)?.*?--:--:--|Speed)", text
        )
        # Pattern 1e: General transfer progress (size, rate, time patterns)
        transfer_match = re.search(
            r"\d+\s+\d+[kMGT]?\s+\d+\s+\d+[kMGT]?.*?\d+\.\d+[kMGT].*?\d+:\d+:\d+", text
        )
        # Pattern 1f: Pacman-style transfer progress (flexible size/speed/time)
        pacman_match = re.search(
            r"\d+(?:\.\d+)?\s+[kKmMgGtT]iB\s+\d+(?:\.\d+)?\s+[kKmMgGtT]iB/s\s+\d+:\d+", text
        )

        if time_match or token_match or dd_match or curl_match or transfer_match or pacman_match:
            # For non-percentage progress, use a single activity beep every 2
            # seconds
            if (
                current_time - self.env["commandBuffer"]["lastProgressTime"]
                >= 2.0
            ):
                self.env["runtime"]["DebugManager"].write_debug_out(
                    "Playing activity beep for transfer progress",
                    debug.DebugLevel.INFO,
                )
                self.play_activity_beep()
                self.env["commandBuffer"]["lastProgressTime"] = current_time
            return

        # Pattern 2: Fraction (15/100, 3 of 10, etc.)
        fraction_match = re.search(r"(\d+)\s*(?:of|/)\s*(\d+)", text)
        if fraction_match:
            current = int(fraction_match.group(1))
            total = int(fraction_match.group(2))
            if total > 0:
                percentage = (current / total) * 100
                if (
                    percentage
                    != self.env["commandBuffer"]["lastProgressValue"]
                ):
                    self.play_progress_tone(percentage)
                    self.env["commandBuffer"]["lastProgressValue"] = percentage
                    self.env["commandBuffer"][
                        "lastProgressTime"
                    ] = current_time
                return

        # Pattern 3: Progress bars ([####    ], [====>   ], etc.)
        # Improved pattern to avoid matching IRC channels like [#channel]
        bar_match = re.search(r"\[([#=\*]+)([\s\.\-]*)\]", text)
        if bar_match:
            filled = len(bar_match.group(1))
            unfilled = len(bar_match.group(2))
            total = filled + unfilled
            # Require at least 2 progress chars total and unfilled portion must
            # be spaces/dots
            if total >= 2 and (
                not bar_match.group(2)
                or re.match(r"^[\s\.]*$", bar_match.group(2))
            ):
                percentage = (filled / total) * 100
                if (
                    percentage
                    != self.env["commandBuffer"]["lastProgressValue"]
                ):
                    self.play_progress_tone(percentage)
                    self.env["commandBuffer"]["lastProgressValue"] = percentage
                    self.env["commandBuffer"][
                        "lastProgressTime"
                    ] = current_time
                return

        # Pattern 4: Generic activity indicators (Loading..., Working..., etc.)
        activity_pattern = re.search(
            r"(loading|processing|working|installing|downloading|compiling|building).*\.{2,}",
            text,
            re.IGNORECASE,
        )
        if activity_pattern:
            # Play a steady beep every 2 seconds for ongoing activity
            if (
                current_time - self.env["commandBuffer"]["lastProgressTime"]
                >= 2.0
            ):
                self.play_activity_beep()
                self.env["commandBuffer"]["lastProgressTime"] = current_time

    def play_progress_tone(self, percentage):
        # Map 0-100% to 400-1200Hz frequency range
        frequency = 400 + (percentage * 8)
        frequency = max(400, min(1200, frequency))  # Clamp to safe range

        # Use Sox directly for clean quiet tones like: play -qn synth .1 tri
        # 400 gain -8
        self.play_quiet_tone(frequency, 0.1)

    def play_activity_beep(self):
        # Single tone for generic activity
        self.play_quiet_tone(800, 0.08)

    def play_quiet_tone(self, frequency, duration):
        """Play a quiet tone using Sox directly"""
        import shlex
        import subprocess

        # Build the Sox command: play -qn synth <duration> tri <frequency> gain
        # -8
        command = f"play -qn synth {duration} tri {frequency} gain -8"

        try:
            # Only play if sound is enabled
            if self.env["runtime"]["SettingsManager"].get_setting_as_bool(
                "sound", "enabled"
            ):
                subprocess.Popen(
                    shlex.split(command),
                    stdin=None,
                    stdout=None,
                    stderr=None,
                    shell=False,
                )
        except Exception as e:
            self.env["runtime"]["DebugManager"].write_debug_out(
                "Sox tone error: " + str(e), debug.DebugLevel.ERROR
            )

    def is_current_line_prompt(self):
        """Check if the current line looks like a standalone prompt (not command with progress)"""
        import re

        try:
            # Get the current screen content
            if not self.env["screen"]["new_content_text"]:
                return False

            lines = self.env["screen"]["new_content_text"].split("\n")
            if not lines:
                return False

            # Check the last line (most common) and current cursor line for
            # prompt patterns
            lines_to_check = []

            # Add last line (most common for prompts)
            if lines:
                lines_to_check.append(lines[-1])

            # Add current cursor line if different from last line
            if (
                self.env["screen"]["new_cursor"]["y"] < len(lines)
                and self.env["screen"]["new_cursor"]["y"] != len(lines) - 1
            ):
                lines_to_check.append(
                    lines[self.env["screen"]["new_cursor"]["y"]]
                )

            # Standalone prompt patterns (no commands mixed in)
            standalone_prompt_patterns = [
                r"^\s*\$\s*$",  # Just $ (with whitespace)
                r"^\s*#\s*$",  # Just # (with whitespace)
                r"^\s*>\s*$",  # Just > (with whitespace)
                r"^\[.*\]\s*[\\\$#>]\s*$",  # [path]$ without commands
                r"^[a-zA-Z0-9._-]+[\\\$#>]\s*$",  # bash-5.1$ without commands
                # Interactive prompt patterns (these ARE standalone)
                r".*\?\s*\[[YyNn]/[YyNn]\]\s*$",  # ? [Y/n] or ? [y/N] style
                r".*\?\s*\[[Yy]es/[Nn]o\]\s*$",  # ? [Yes/No] style
                # "continue? [Y/n]" style
                r".*continue\?\s*\[[YyNn]/[YyNn]\].*$",
                r"^::.*\?\s*\[[YyNn]/[YyNn]\].*$",  # pacman style prompts
                # Authentication prompts (these ARE standalone)
                r"^\[[Ss]udo\]\s*[Pp]assword\s*for\s+.*:\s*$",  # [sudo] password
                r"^[Pp]assword\s*:\s*$",  # Password:
                r".*[Pp]assword\s*:\s*$",  # general password prompts
                # Continuation prompts (these ARE standalone)
                r"^[Pp]ress\s+any\s+key\s+to\s+continue.*$",  # Press any key
                r"^[Aa]re\s+you\s+sure\?\s*.*$",  # Are you sure?
            ]

            for line in lines_to_check:
                line = line.strip()
                if not line:
                    continue

                # Check if this line contains both a prompt AND other content (like commands)
                # If so, don't treat it as a standalone prompt
                has_prompt_marker = bool(
                    re.search(r".*@.*[\\\$#>]", line)
                    or re.search(r"^\[.*\]\s*[\\\$#>]", line)
                )
                if has_prompt_marker:
                    # If line has prompt marker but also has significant content after it,
                    # it's a command line, not a standalone prompt
                    prompt_end = max(
                        line.rfind("$"),
                        line.rfind("#"),
                        line.rfind(">"),
                        line.rfind("\\"),
                    )
                    if (
                        prompt_end >= 0 and prompt_end < len(line) - 5
                    ):  # More than just whitespace after prompt
                        continue  # This is a command line, not a standalone prompt

                for pattern in standalone_prompt_patterns:
                    try:
                        if re.search(pattern, line):
                            return True
                    except re.error:
                        continue

            return False

        except Exception:
            # If anything fails, assume it's not a prompt to be safe
            return False

    def contains_url(self, text):
        """Check if text contains URLs that might cause false progress detection"""
        import re
        
        # Common URL patterns that might contain progress-like patterns
        url_patterns = [
            r"https?://[^\s]+",           # http:// or https:// URLs
            r"ftp://[^\s]+",              # ftp:// URLs
            r"www\.[^\s]+",               # www. domains
            r"[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}[/\w.-]*",  # domain.com/path patterns
        ]
        
        for pattern in url_patterns:
            if re.search(pattern, text, re.IGNORECASE):
                return True
        return False

    def set_callback(self, callback):
        pass