#!/usr/bin/env python3
"""
Enhanced Oscilloscope with Pipeline Switching

This demo features:
1. Text-based oscilloscope (first 15 seconds)
2. Pygame renderer with PIL to ANSI conversion (next 15 seconds)
3. Continuous looping between the two modes

Usage:
    uv run python scripts/demo_oscilloscope_pipeline.py --lfo --modulate
"""

import argparse
import sys
import time
from pathlib import Path

# Add mainline to path
sys.path.insert(0, str(Path(__file__).parent.parent))

from engine.sensors.oscillator import OscillatorSensor, register_oscillator_sensor


class ModulatedOscillator:
    """Oscillator with frequency modulation from another oscillator."""

    def __init__(
        self,
        name: str,
        waveform: str = "sine",
        base_frequency: float = 1.0,
        modulator: "OscillatorSensor | None" = None,
        modulation_depth: float = 0.5,
    ):
        self.name = name
        self.waveform = waveform
        self.base_frequency = base_frequency
        self.modulator = modulator
        self.modulation_depth = modulation_depth

        register_oscillator_sensor(
            name=name, waveform=waveform, frequency=base_frequency
        )
        self.osc = OscillatorSensor(
            name=name, waveform=waveform, frequency=base_frequency
        )
        self.osc.start()

    def read(self):
        """Read current value, applying modulation if present."""
        if self.modulator:
            mod_reading = self.modulator.read()
            if mod_reading:
                mod_offset = (mod_reading.value - 0.5) * 2 * self.modulation_depth
                effective_freq = self.base_frequency + mod_offset
                effective_freq = max(0.1, min(effective_freq, 20.0))
                self.osc._frequency = effective_freq
        return self.osc.read()

    def get_phase(self):
        return self.osc._phase

    def get_effective_frequency(self):
        if self.modulator:
            mod_reading = self.modulator.read()
            if mod_reading:
                mod_offset = (mod_reading.value - 0.5) * 2 * self.modulation_depth
                return max(0.1, min(self.base_frequency + mod_offset, 20.0))
        return self.base_frequency

    def stop(self):
        self.osc.stop()


def render_text_mode(
    width: int,
    height: int,
    modulator: OscillatorSensor,
    modulated: ModulatedOscillator,
    frame: int,
) -> str:
    """Render dual waveforms in text mode."""
    mod_reading = modulator.read()
    mod_val = mod_reading.value if mod_reading else 0.5
    modulated_reading = modulated.read()
    modulated_val = modulated_reading.value if modulated_reading else 0.5

    lines = []
    header1 = (
        f"TEXT MODE | MODULATOR: {modulator.waveform} @ {modulator.frequency:.2f}Hz"
    )
    header2 = (
        f"MODULATED: {modulated.waveform} @ {modulated.get_effective_frequency():.2f}Hz"
    )
    lines.append(header1)
    lines.append(header2)
    lines.append("─" * width)

    # Modulator waveform (top half)
    top_height = (height - 5) // 2
    waveform_fn = modulator.WAVEFORMS[modulator.waveform]
    mod_time_offset = modulator._phase * modulator.frequency * 0.3

    for row in range(top_height):
        row_pos = 1.0 - (row / (top_height - 1))
        line_chars = []
        for col in range(width):
            col_fraction = col / width
            time_pos = mod_time_offset + col_fraction
            sample = waveform_fn(time_pos * modulator.frequency * 2)
            tolerance = 1.0 / (top_height - 1)
            if abs(sample - row_pos) < tolerance:
                line_chars.append("█")
            else:
                line_chars.append(" ")
        lines.append("".join(line_chars))

    lines.append(
        f"─ MODULATION: depth={modulated.modulation_depth:.2f} | mod_value={mod_val:.2f} ─"
    )

    # Modulated waveform (bottom half)
    bottom_height = height - top_height - 5
    waveform_fn = modulated.osc.WAVEFORMS[modulated.waveform]
    modulated_time_offset = (
        modulated.get_phase() * modulated.get_effective_frequency() * 0.3
    )

    for row in range(bottom_height):
        row_pos = 1.0 - (row / (bottom_height - 1))
        line_chars = []
        for col in range(width):
            col_fraction = col / width
            time_pos = modulated_time_offset + col_fraction
            sample = waveform_fn(time_pos * modulated.get_effective_frequency() * 2)
            tolerance = 1.0 / (bottom_height - 1)
            if abs(sample - row_pos) < tolerance:
                line_chars.append("█")
            else:
                line_chars.append(" ")
        lines.append("".join(line_chars))

    footer = (
        f"Mod Value: {mod_val:.3f} | Modulated: {modulated_val:.3f} | Frame: {frame}"
    )
    lines.append(footer)
    return "\n".join(lines)


def render_pygame_to_ansi(
    width: int,
    height: int,
    modulator: OscillatorSensor,
    modulated: ModulatedOscillator,
    frame: int,
    font_path: str | None,
) -> str:
    """Render waveforms using Pygame, convert to ANSI with PIL."""
    try:
        import pygame
        from PIL import Image
    except ImportError:
        return "Pygame or PIL not available\n\n" + render_text_mode(
            width, height, modulator, modulated, frame
        )

    # Initialize Pygame surface (smaller for ANSI conversion)
    pygame_width = width * 2  # Double for better quality
    pygame_height = height * 4
    surface = pygame.Surface((pygame_width, pygame_height))
    surface.fill((10, 10, 20))  # Dark background

    # Get readings
    mod_reading = modulator.read()
    mod_val = mod_reading.value if mod_reading else 0.5
    modulated_reading = modulated.read()
    modulated_val = modulated_reading.value if modulated_reading else 0.5

    # Draw modulator waveform (top half)
    top_height = pygame_height // 2
    waveform_fn = modulator.WAVEFORMS[modulator.waveform]
    mod_time_offset = modulator._phase * modulator.frequency * 0.3

    prev_x, prev_y = 0, 0
    for x in range(pygame_width):
        col_fraction = x / pygame_width
        time_pos = mod_time_offset + col_fraction
        sample = waveform_fn(time_pos * modulator.frequency * 2)
        y = int(top_height - (sample * (top_height - 20)) - 10)
        if x > 0:
            pygame.draw.line(surface, (100, 200, 255), (prev_x, prev_y), (x, y), 2)
        prev_x, prev_y = x, y

    # Draw separator
    pygame.draw.line(
        surface, (80, 80, 100), (0, top_height), (pygame_width, top_height), 1
    )

    # Draw modulated waveform (bottom half)
    bottom_start = top_height + 10
    bottom_height = pygame_height - bottom_start - 20
    waveform_fn = modulated.osc.WAVEFORMS[modulated.waveform]
    modulated_time_offset = (
        modulated.get_phase() * modulated.get_effective_frequency() * 0.3
    )

    prev_x, prev_y = 0, 0
    for x in range(pygame_width):
        col_fraction = x / pygame_width
        time_pos = modulated_time_offset + col_fraction
        sample = waveform_fn(time_pos * modulated.get_effective_frequency() * 2)
        y = int(bottom_start + (bottom_height - (sample * (bottom_height - 20))) - 10)
        if x > 0:
            pygame.draw.line(surface, (255, 150, 100), (prev_x, prev_y), (x, y), 2)
        prev_x, prev_y = x, y

    # Draw info text on pygame surface
    try:
        if font_path:
            font = pygame.font.Font(font_path, 16)
            info_text = f"PYGAME MODE | Mod: {mod_val:.2f} | Out: {modulated_val:.2f} | Frame: {frame}"
            text_surface = font.render(info_text, True, (200, 200, 200))
            surface.blit(text_surface, (10, 10))
    except Exception:
        pass

    # Convert Pygame surface to PIL Image
    img_str = pygame.image.tostring(surface, "RGB")
    pil_image = Image.frombytes("RGB", (pygame_width, pygame_height), img_str)

    # Convert to ANSI
    return pil_to_ansi(pil_image)


def pil_to_ansi(image) -> str:
    """Convert PIL image to ANSI escape codes."""
    # Resize for terminal display
    terminal_width = 80
    terminal_height = 30
    image = image.resize((terminal_width * 2, terminal_height * 2))

    # Convert to grayscale
    image = image.convert("L")

    # ANSI character ramp (dark to light)
    chars = " .:-=+*#%@"

    lines = []
    for y in range(0, image.height, 2):  # Sample every 2nd row for aspect ratio
        line = ""
        for x in range(0, image.width, 2):
            pixel = image.getpixel((x, y))
            char_index = int((pixel / 255) * (len(chars) - 1))
            line += chars[char_index]
        lines.append(line)

    # Add header info
    header = "PYGAME → ANSI RENDER MODE"
    header_line = "─" * terminal_width
    return f"{header}\n{header_line}\n" + "\n".join(lines)


def demo_with_pipeline_switching(
    waveform: str = "sine",
    base_freq: float = 0.5,
    modulate: bool = False,
    mod_waveform: str = "sine",
    mod_freq: float = 0.5,
    mod_depth: float = 0.5,
    frames: int = 0,
):
    """Run demo with pipeline switching every 15 seconds."""
    frame_interval = 1.0 / 15.0  # 15 FPS
    mode_duration = 15.0  # 15 seconds per mode

    print("Enhanced Oscilloscope with Pipeline Switching")
    print(f"Mode duration: {mode_duration} seconds")
    print("Frame rate: 15 FPS")
    print()

    # Create oscillators
    modulator = OscillatorSensor(
        name="modulator", waveform=mod_waveform, frequency=mod_freq
    )
    modulator.start()

    modulated = ModulatedOscillator(
        name="modulated",
        waveform=waveform,
        base_frequency=base_freq,
        modulator=modulator if modulate else None,
        modulation_depth=mod_depth,
    )

    # Find font path
    font_path = Path("fonts/Pixel_Sparta.otf")
    if not font_path.exists():
        font_path = Path("fonts/Pixel Sparta.otf")
    font_path = str(font_path) if font_path.exists() else None

    # Run demo loop
    try:
        frame = 0
        mode_start_time = time.time()
        mode_index = 0  # 0 = text, 1 = pygame

        while frames == 0 or frame < frames:
            elapsed = time.time() - mode_start_time

            # Switch mode every 15 seconds
            if elapsed >= mode_duration:
                mode_index = (mode_index + 1) % 2
                mode_start_time = time.time()
                print(f"\n{'=' * 60}")
                print(
                    f"SWITCHING TO {'PYGAME+ANSI' if mode_index == 1 else 'TEXT'} MODE"
                )
                print(f"{'=' * 60}\n")
                time.sleep(1.0)  # Brief pause to show mode switch

            # Render based on mode
            if mode_index == 0:
                # Text mode
                visualization = render_text_mode(80, 30, modulator, modulated, frame)
            else:
                # Pygame + PIL to ANSI mode
                visualization = render_pygame_to_ansi(
                    80, 30, modulator, modulated, frame, font_path
                )

            # Display with cursor positioning
            print("\033[H" + visualization)

            # Frame timing
            time.sleep(frame_interval)
            frame += 1

    except KeyboardInterrupt:
        print("\n\nDemo stopped by user")

    finally:
        modulator.stop()
        modulated.stop()


if __name__ == "__main__":
    parser = argparse.ArgumentParser(
        description="Enhanced oscilloscope with pipeline switching"
    )
    parser.add_argument(
        "--waveform",
        choices=["sine", "square", "sawtooth", "triangle", "noise"],
        default="sine",
        help="Main waveform type",
    )
    parser.add_argument(
        "--frequency",
        type=float,
        default=0.5,
        help="Main oscillator frequency (LFO range)",
    )
    parser.add_argument(
        "--lfo",
        action="store_true",
        help="Use slow LFO frequency (0.5Hz)",
    )
    parser.add_argument(
        "--modulate",
        action="store_true",
        help="Enable LFO modulation chain",
    )
    parser.add_argument(
        "--mod-waveform",
        choices=["sine", "square", "sawtooth", "triangle", "noise"],
        default="sine",
        help="Modulator waveform type",
    )
    parser.add_argument(
        "--mod-freq",
        type=float,
        default=0.5,
        help="Modulator frequency in Hz",
    )
    parser.add_argument(
        "--mod-depth",
        type=float,
        default=0.5,
        help="Modulation depth",
    )
    parser.add_argument(
        "--frames",
        type=int,
        default=0,
        help="Number of frames to render (0 = infinite)",
    )

    args = parser.parse_args()

    base_freq = args.frequency
    if args.lfo:
        base_freq = 0.5

    demo_with_pipeline_switching(
        waveform=args.waveform,
        base_freq=base_freq,
        modulate=args.modulate,
        mod_waveform=args.mod_waveform,
        mod_freq=args.mod_freq,
        mod_depth=args.mod_depth,
    )