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

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

from fenrirscreenreader.core.i18n import _

from fenrirscreenreader.core import debug


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)

        # 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)

        if time_match or token_match or dd_match or curl_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 subprocess
        import shlex

        # 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 set_callback(self, callback):
        pass