#!/usr/bin/env python3
"""
TTS Audio Suite - Engine Tables Generator
Generates documentation tables from YAML source of truth.
Also injects condensed table into README.md between markers.
"""

import yaml
import re
import sys
from pathlib import Path


def configure_utf8_console() -> None:
    """Keep Windows console output from failing on non-UTF-8 locales."""
    for stream in (sys.stdout, sys.stderr):
        if hasattr(stream, "reconfigure"):
            stream.reconfigure(encoding="utf-8", errors="replace")


def load_data():
    """Load YAML data"""
    yaml_path = Path(__file__).parent.parent / "docs/Dev reports/tts_audio_suite_engines.yaml"
    with open(yaml_path, encoding="utf-8") as f:
        return yaml.safe_load(f)


def format_support(value, notes=""):
    """Format boolean/partial support with optional notes"""
    if value is None:
        return "N/A"
    elif value == "partial":
        return f"⚠️ {notes}" if notes else "⚠️"
    elif value is True:
        return f"✅ {notes}" if notes else "✅"
    else:
        return "❌"


def format_requirement(value):
    """Format a non-boolean engine input requirement."""
    labels = {
        "required": "**Required**",
        "conditional": "Conditional",
        "optional": "Optional",
        "not_used": "Not used",
        "not_applicable": "N/A",
    }
    if value not in labels:
        raise ValueError(f"Unknown engine requirement value: {value!r}")
    return labels[value]


def format_markdown_link(name, url):
    """Format optional markdown link."""
    if not name and not url:
        return "-"
    if url:
        return f"[{name}]({url})" if name else f"[link]({url})"
    return name


def get_speed_emoji(speed_note):
    """Convert speed note to emoji"""
    if "Very Fast" in speed_note:
        return "⚡⚡"
    elif "Fast" in speed_note:
        return "⚡"
    else:
        return "🐌"


def get_runtime_mode_meta(data, mode_key):
    """Resolve runtime isolation mode metadata."""
    return data.get("runtime_isolation_modes", {}).get("modes", {}).get(mode_key, {})


def get_engine_runtime_mode(engine):
    """Return engine default runtime mode key."""
    runtime_meta = engine.get("runtime_isolation")
    if not runtime_meta:
        return "main_environment"
    return runtime_meta.get("default_mode", "main_environment")


def format_runtime_label(data, mode_key, short=False):
    """Format runtime mode label."""
    meta = get_runtime_mode_meta(data, mode_key)
    if short:
        return meta.get("short_label") or meta.get("label") or mode_key
    return meta.get("label", mode_key)


def get_isolation_engines(data):
    """Return engines that currently document runtime isolation support."""
    return [engine for engine in data["engines"] if engine.get("runtime_isolation")]


def build_isolation_note(data):
    """Build a short isolation footnote for generated tables."""
    isolation_engines = get_isolation_engines(data)
    if not isolation_engines:
        return ""

    return (
        "*Isolation column: `Main` runs in the main ComfyUI environment. "
        "`Shared` uses a shared secondary runtime reused by multiple engines. "
        "`Dedicated` uses an engine-specific secondary runtime.*"
    )


def generate_engine_comparison(data):
    """Generate main engine comparison table"""
    engines = data["engines"]

    output = []
    output.append("# TTS Engines Reference Tables")
    output.append("")
    output.append("## Engine Comparison")
    output.append("")
    output.append("| Engine             | Isolation | Models                                    | Size         | TTS | SRT | VC  | ASR | Sound Effects | Training | License                  | Special Features                                                                         | Languages                                                                                |")
    output.append("| ------------------ | --------- | ----------------------------------------- | ------------ | :-: | :-: | :-: | :-: | :-----------: | :------: | ------------------------ | ---------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------- |")

    for e in engines:
        language_summary = e.get("language_summary_full")
        if not language_summary:
            supported_language_count = sum(
                1
                for lang_key, lang_data in e["languages"].items()
                if lang_key != "_default" and lang_data["supported"]
            )
            if e["id"] == "rvc":
                language_summary = "Any"
            else:
                language_summary = str(supported_language_count)

        # Format special features with proper spacing
        features = ", ".join(e.get("special_features", []))

        row = [
            f"**{e['name']}**".ljust(18),
            format_runtime_label(data, get_engine_runtime_mode(e), short=True).ljust(9),
            e["models"].ljust(41),
            e["size"].ljust(12),
            format_support(e["capabilities"]["tts"]),
            format_support(e["capabilities"]["srt"]),
            format_support(e["capabilities"]["vc"]),
            format_support(e["capabilities"]["asr"]),
            format_support(e["capabilities"].get("sound_effects", False)),
            format_support(e["capabilities"].get("training", False)),
            e.get("license", "Unknown").ljust(24),
            features.ljust(88),
            language_summary.ljust(88)
        ]

        output.append("| " + " | ".join(row) + " |")

    isolation_note = build_isolation_note(data)
    if isolation_note:
        output.append("")
        output.append(isolation_note)

    return "\n".join(output)


def generate_readme_condensed_table(data):
    """Generate condensed table for README.md"""
    engines = data["engines"]

    engine_count = len(engines)

    output = []
    output.append(f"## Quick Engine Comparison — {engine_count} Engines")
    output.append("")
    output.append("| Engine | Languages | Size | Key Features |")
    output.append("|--------|-----------|------|--------------|")

    # Show ALL engines
    for e in engines:
        language_summary_override = e.get("language_summary_compact")
        if language_summary_override:
            lang_display = language_summary_override
        else:
            # Get first 6-8 language flags
            flags = []
            count = 0
            for lang_data in e["languages"].values():
                if isinstance(lang_data, dict) and lang_data.get("supported") and lang_data.get("flag"):
                    flags.append(lang_data["flag"])
                    count += 1
                    if count >= 6:  # Limit to 6 flags for readability
                        break

            lang_display = "\u200B".join(flags)

            # Special handling for ChatterBox 23L
            if e["id"] == "chatterbox-23l":
                lang_display = "🌐 24 languages"
            # Special handling for RVC
            elif e["id"] == "rvc":
                lang_display = "🌐 Any"
            else:
                # Add count if more languages exist
                total_langs = sum(1 for ld in e["languages"].values() if ld["supported"])
                if total_langs > 6:
                    lang_display += f" +{total_langs - 6}"

        # Get 1-2 key features
        special_features = e.get(
            "readme_key_features",
            e.get("special_features", []),
        )
        if len(special_features) > 2:
            key_features = ", ".join(special_features[:2])
        else:
            key_features = ", ".join(special_features)

        row = [
            f"**{e['name']}**",
            lang_display,
            e["size"],
            key_features
        ]

        output.append("| " + " | ".join(row) + " |")

    # Add footer with links
    output.append("")
    output.append("📊 **[Full comparison tables →](docs/ENGINE_COMPARISON.md)** | "
                  "**[Language matrix →](docs/LANGUAGE_SUPPORT.md)** | "
                  "**[Feature matrix →](docs/FEATURE_COMPARISON.md)** | "
                  "**[Model download sources →](docs/MODEL_DOWNLOAD_SOURCES.md)** | "
                  "**[Model folder layouts →](docs/MODEL_LAYOUTS.md)**")
    output.append("")
    output.append("*Note: These tables are generated automatically from source: [tts_audio_suite_engines.yaml](docs/Dev%20reports/tts_audio_suite_engines.yaml)*")

    return "\n".join(output)




def generate_model_download_sources(data):
    """Generate model download sources table grouped by engine."""
    engines = data["engines"]

    output = []
    output.append("# Model Download Sources")
    output.append("")
    output.append("All entries below are generated from the single source of truth YAML.")
    output.append("Use this as the canonical list of model repositories/links for offline setup.")
    output.append("")

    for engine in engines:
        sources = engine.get("model_sources", [])
        if not sources:
            continue

        output.append(f"## {engine['name']}")
        output.append("")
        output.append("| Component | Source | Size | Auto-Download | Notes |")
        output.append("|---|---|---|---|---|")

        for source in sources:
            component = source.get("component", "-")
            source_name = source.get("source_name", "")
            source_url = source.get("source_url", "")
            source_display = format_markdown_link(source_name, source_url)
            size = source.get("size", "-")
            auto_download = format_support(source.get("auto_download"))
            notes = source.get("notes", "")

            output.append(
                f"| {component} | {source_display} | {size} | {auto_download} | {notes} |"
            )

        output.append("")

    output.append("*Generated from [tts_audio_suite_engines.yaml](Dev%20reports/tts_audio_suite_engines.yaml).*")
    return "\n".join(output)


def generate_readme_model_download_table(data):
    """Generate README auto-download summary table from YAML source."""
    rows = data.get("readme_model_download_table", [])

    output = []
    output.append("| Engine | Primary model path | Auto-download | Notes |")
    output.append("|---|---|---|---|")

    for row in rows:
        engine = row.get("engine", "-")
        path = row.get("primary_model_path", "-")
        auto_download = row.get("auto_download", "N/A")
        notes = row.get("notes", "")
        output.append(f"| {engine} | `{path}` | {auto_download} | {notes} |")

    output.append("")
    output.append("*Generated from [tts_audio_suite_engines.yaml](docs/Dev%20reports/tts_audio_suite_engines.yaml).*")
    return "\n".join(output)


def generate_model_layouts(data):
    """Generate model layout documentation from YAML source."""
    model_layouts_markdown = data.get("model_layouts_markdown", "")
    if model_layouts_markdown:
        return model_layouts_markdown.strip() + "\n"

    # Fallback so the file is still generated even without YAML content.
    output = []
    output.append("# Model Folder Layouts")
    output.append("")
    output.append("No model layout data found in YAML source.")
    output.append("")
    output.append("Populate `model_layouts_markdown` in `docs/Dev reports/tts_audio_suite_engines.yaml`.")
    return "\n".join(output)


def generate_language_support(data):
    """Generate language support matrix"""
    engines = data["engines"]
    lang_meta = data["language_metadata"]

    # Get all language codes in order
    lang_codes = list(lang_meta.keys())

    output = []
    output.append("# Language Support by Engine")
    output.append("")
    output.append("## Language Support by Engine")
    output.append("")

    # Build header
    header = "| Language       | Code |"
    separator = "|---|---|"
    for e in engines:
        header += f" {e['name']} |"
        separator += "---|"

    output.append(header)
    output.append(separator)

    # Build rows for each language
    for lang_code in lang_codes:
        lang_info = lang_meta[lang_code]
        flag = lang_info.get("flag")
        if not flag:
            for engine in engines:
                engine_lang = engine.get("languages", {}).get(lang_code)
                if engine_lang and engine_lang.get("flag"):
                    flag = engine_lang["flag"]
                    break
        if not flag:
            flag = "🌐"

        row = [
            f"{flag} **{lang_info['name']}**".ljust(14),
            lang_info['code'].ljust(4)
        ]

        for e in engines:
            engine_languages = e.get("languages", {})
            if e.get("id") == "rvc" and lang_code not in engine_languages:
                lang_support = {"supported": True, "notes": ""}
            else:
                lang_support = engine_languages.get(
                    lang_code,
                    {"supported": False, "notes": ""}
                )
            cell = format_support(lang_support["supported"], lang_support["notes"])
            row.append(cell)

        output.append("| " + " | ".join(row) + " |")

    # Add notes
    output.append("")
    output.append("**Notes:**")
    output.append("")
    for note in data["table_notes"]["language_support"]:
        output.append(f"- {note}")

    return "\n".join(output)


def generate_feature_comparison(data):
    """Generate feature comparison matrix"""
    engines = data["engines"]
    feat_meta = data["feature_metadata"]

    output = []
    output.append("# Feature Comparison Matrix")
    output.append("")
    output.append("## Feature Comparison Matrix")
    output.append("")

    # Build header
    header = "| Feature                      |"
    separator = "|---|"
    for e in engines:
        header += f" {e['name']} |"
        separator += "---|"

    output.append(header)
    output.append(separator)

    capability_rows = [
        ("**TTS**", "tts"),
        ("**SRT**", "srt"),
        ("**Voice Conversion**", "vc"),
        ("**ASR (Transcribe)**", "asr"),
        ("**Sound Effects**", "sound_effects"),
        ("**Training**", "training"),
    ]
    duplicated_feature_keys = {"voice_conversion", "asr_transcribe"}

    for display_name, capability_key in capability_rows:
        row = [display_name.ljust(28)]
        for e in engines:
            cell = format_support(e["capabilities"].get(capability_key, False))
            row.append(cell)
        output.append("| " + " | ".join(row) + " |")

    # Build rows for each feature
    for feat_key, feat_info in feat_meta.items():
        if feat_key in duplicated_feature_keys:
            continue
        row = [feat_info["display"].ljust(28)]

        for e in engines:
            feat_support = e["features"][feat_key]
            if feat_info.get("value_type") == "requirement":
                cell = format_requirement(feat_support["requirement"])
            else:
                cell = format_support(feat_support["supported"], feat_support["notes"])
            row.append(cell)

        output.append("| " + " | ".join(row) + " |")

    transcript_note = data.get("table_notes", {}).get("reference_transcript", "")
    if transcript_note:
        output.append("")
        output.append(f"† **Reference Transcript:** {transcript_note}")

    return "\n".join(output)


def generate_license_table(data):
    """Generate model licenses summary table for LICENSE file (plain text)"""
    engines = data["engines"]

    commercial_map = {
        True: "Yes",
        False: "No",
        "conditional": "Conditional",
        "varies": "Varies",
    }

    rows = []
    for e in engines:
        license_str = e.get("license", "Unknown")
        commercial = e.get("commercial", "varies")
        commercial_str = commercial_map.get(commercial, "Unknown")
        rows.append((e["name"], license_str, commercial_str))

    # Calculate column widths
    col1 = max(len("Engine"), max(len(r[0]) for r in rows))
    col2 = max(len("License"), max(len(r[1]) for r in rows))
    col3 = max(len("Commercial Use"), max(len(r[2]) for r in rows))

    sep = f"  {'─' * col1}  {'─' * col2}  {'─' * col3}"
    header = f"  {'Engine':<{col1}}  {'License':<{col2}}  {'Commercial Use':<{col3}}"

    output = []
    output.append("Third-Party Model Licenses")
    output.append("──────────────────────────")
    output.append("")
    output.append("The project code is MIT. Model weights carry their own licenses:")
    output.append("")
    output.append(sep)
    output.append(header)
    output.append(sep)
    for name, lic, com in rows:
        output.append(f"  {name:<{col1}}  {lic:<{col2}}  {com}")
    output.append(sep)
    output.append("")
    output.append("Users are responsible for complying with respective model licenses.")

    return "\n".join(output)


def inject_into_license(license_table):
    """Inject license table into LICENSE file after the '---' separator. Returns: True=written, False=unchanged, None=error"""
    license_path = Path(__file__).parent.parent / "LICENSE"

    with open(license_path, "r", encoding="utf-8") as f:
        content = f.read()

    separator = "\n---\n"
    sep_idx = content.find(separator)
    if sep_idx == -1:
        print("⚠️  '---' separator not found in LICENSE")
        return None

    mit_section = content[: sep_idx + len(separator)]
    new_content = mit_section + "\n" + license_table + "\n"

    if new_content == content:
        return False

    with open(license_path, "w", encoding="utf-8") as f:
        f.write(new_content)

    return True


def inject_into_readme(condensed_table):
    """Inject condensed table into README.md between markers. Returns: True=written, False=unchanged, None=error"""
    readme_path = Path(__file__).parent.parent / "README.md"

    # Read current README
    with open(readme_path, "r", encoding="utf-8") as f:
        content = f.read()

    # Define markers
    start_marker = "<!-- ENGINE_COMPARISON_START -->"
    end_marker = "<!-- ENGINE_COMPARISON_END -->"

    # Check if markers exist
    if start_marker not in content or end_marker not in content:
        print("⚠️  Markers not found in README.md")
        print(f"   Please add these markers where you want the table:")
        print(f"   {start_marker}")
        print(f"   {end_marker}")
        return None  # Error

    # Replace content between markers
    pattern = f"{re.escape(start_marker)}.*?{re.escape(end_marker)}"
    replacement = f"{start_marker}\n\n{condensed_table}\n\n{end_marker}"

    new_content = re.sub(pattern, replacement, content, flags=re.DOTALL)

    # Check if content actually changed
    if new_content == content:
        return False  # No change

    # Write back only if changed
    with open(readme_path, "w", encoding="utf-8") as f:
        f.write(new_content)

    return True  # Written


def inject_section_into_readme(section_body, start_marker, end_marker):
    """Inject generated content into README.md between custom markers."""
    readme_path = Path(__file__).parent.parent / "README.md"

    with open(readme_path, "r", encoding="utf-8") as f:
        content = f.read()

    if start_marker not in content or end_marker not in content:
        print("⚠️  Markers not found in README.md")
        print(f"   Please add these markers where you want the table:")
        print(f"   {start_marker}")
        print(f"   {end_marker}")
        return None

    pattern = f"{re.escape(start_marker)}.*?{re.escape(end_marker)}"
    replacement = f"{start_marker}\n\n{section_body}\n\n{end_marker}"
    new_content = re.sub(pattern, replacement, content, flags=re.DOTALL)

    if new_content == content:
        return False

    with open(readme_path, "w", encoding="utf-8") as f:
        f.write(new_content)

    return True


def write_if_changed(file_path, new_content):
    """Write file only if content changed. Returns True if written."""
    # Check if file exists and compare content
    if file_path.exists():
        with open(file_path, "r", encoding="utf-8") as f:
            existing_content = f.read()

        if existing_content == new_content:
            return False  # No change needed

    # Write the file
    with open(file_path, "w", encoding="utf-8") as f:
        f.write(new_content)
    return True  # File was written


def main():
    """Generate all tables and optionally inject into README"""
    import sys

    data = load_data()
    docs_dir = Path(__file__).parent.parent / "docs"

    # Generate Engine Comparison
    print("Generating Engine Comparison table...")
    engine_comp = generate_engine_comparison(data)
    if write_if_changed(docs_dir / "ENGINE_COMPARISON.md", engine_comp):
        print(f"✅ Written to {docs_dir / 'ENGINE_COMPARISON.md'}")
    else:
        print(f"⏭️  Skipped {docs_dir / 'ENGINE_COMPARISON.md'} (unchanged)")

    # Generate Language Support
    print("Generating Language Support table...")
    lang_support = generate_language_support(data)
    if write_if_changed(docs_dir / "LANGUAGE_SUPPORT.md", lang_support):
        print(f"✅ Written to {docs_dir / 'LANGUAGE_SUPPORT.md'}")
    else:
        print(f"⏭️  Skipped {docs_dir / 'LANGUAGE_SUPPORT.md'} (unchanged)")

    # Generate Feature Comparison
    print("Generating Feature Comparison table...")
    feat_comp = generate_feature_comparison(data)
    if write_if_changed(docs_dir / "FEATURE_COMPARISON.md", feat_comp):
        print(f"✅ Written to {docs_dir / 'FEATURE_COMPARISON.md'}")
    else:
        print(f"⏭️  Skipped {docs_dir / 'FEATURE_COMPARISON.md'} (unchanged)")

    # Generate Model Download Sources
    print("Generating Model Download Sources table...")
    model_sources = generate_model_download_sources(data)
    if write_if_changed(docs_dir / "MODEL_DOWNLOAD_SOURCES.md", model_sources):
        print(f"✅ Written to {docs_dir / 'MODEL_DOWNLOAD_SOURCES.md'}")
    else:
        print(f"⏭️  Skipped {docs_dir / 'MODEL_DOWNLOAD_SOURCES.md'} (unchanged)")

    # Generate Model Layouts
    print("Generating Model Folder Layouts doc...")
    model_layouts = generate_model_layouts(data)
    if write_if_changed(docs_dir / "MODEL_LAYOUTS.md", model_layouts):
        print(f"✅ Written to {docs_dir / 'MODEL_LAYOUTS.md'}")
    else:
        print(f"⏭️  Skipped {docs_dir / 'MODEL_LAYOUTS.md'} (unchanged)")

    # Generate and inject license table into LICENSE file
    print("Generating model licenses table...")
    license_table = generate_license_table(data)
    result = inject_into_license(license_table)
    if result is True:
        print("✅ LICENSE updated successfully!")
    elif result is False:
        print("⏭️  Skipped LICENSE (unchanged)")
    else:
        print("❌ LICENSE injection failed (markers not found)")

    # Generate and inject condensed README table
    print("\nGenerating condensed README table...")
    condensed = generate_readme_condensed_table(data)
    print("Generating README model auto-download table...")
    readme_model_table = generate_readme_model_download_table(data)

    # Check if --readme flag is passed
    if "--readme" in sys.argv:
        print("Injecting into README.md...")
        condensed_result = inject_into_readme(condensed)
        model_table_result = inject_section_into_readme(
            readme_model_table,
            "<!-- README_MODEL_DOWNLOAD_TABLE_START -->",
            "<!-- README_MODEL_DOWNLOAD_TABLE_END -->",
        )
        if condensed_result is None or model_table_result is None:
            print("❌ README.md injection failed (markers not found)")
        elif condensed_result is True or model_table_result is True:
            print("✅ README.md updated successfully!")
        else:
            print("⏭️  Skipped README.md (unchanged)")
    else:
        print("ℹ️  Condensed table generated (use --readme flag to inject into README.md)")
        print("\nPreview:")
        print(condensed)

    print("\n✅ All tables generated successfully!")


if __name__ == "__main__":
    configure_utf8_console()
    main()