#!/usr/bin/env python3
"""Synthesize Praxy/Chatterbox audio from cleaned S2S text CSV rows."""

from __future__ import annotations

import argparse
import csv
from pathlib import Path
import sys
import traceback
from typing import Any

ROOT = Path(__file__).resolve().parents[1]
for path in (ROOT / "src", ROOT / "scripts"):
    if str(path) not in sys.path:
        sys.path.insert(0, str(path))

from run_s2s_live import DEFAULT_PRAXY_ANCHOR  # noqa: E402
from urdu_s2s.schemas import BridgeResult, ReplyResult, SpeechToSpeechRequest  # noqa: E402
from urdu_s2s.tts_providers import ChatterboxPraxyTTSProvider  # noqa: E402


DEFAULT_INPUT_CSV = ROOT / "reports/evals/s2s_live_smoke10_text_v2.csv"
DEFAULT_OUTPUT_DIR = ROOT / "reports/evals/s2s_live_smoke10_text_v2_audio"
DEFAULT_SUMMARY_CSV = ROOT / "reports/evals/s2s_live_smoke10_text_v2_audio_summary.csv"

FIELDNAMES = [
    "id",
    "status",
    "assistant_reply_urdu",
    "devanagari_tts_text",
    "tts_audio_path",
    "duration_seconds",
    "error",
]


def resolve_repo_path(path: Path) -> Path:
    return path if path.is_absolute() else ROOT / path


def parse_ids(raw_ids: str) -> set[str] | None:
    ids = {part.strip() for part in raw_ids.split(",") if part.strip()}
    return ids or None


def read_rows(path: Path, selected_ids: set[str] | None = None) -> list[dict[str, str]]:
    with path.open(newline="", encoding="utf-8") as handle:
        rows = list(csv.DictReader(handle))
    if selected_ids is not None:
        rows = [row for row in rows if row.get("id") in selected_ids]
    return rows


def write_summary(path: Path, rows: list[dict[str, object]]) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    with path.open("w", newline="", encoding="utf-8") as handle:
        writer = csv.DictWriter(handle, fieldnames=FIELDNAMES)
        writer.writeheader()
        for row in rows:
            writer.writerow({field: row.get(field, "") for field in FIELDNAMES})


def run_tts_rows(
    *,
    input_csv: Path,
    output_dir: Path,
    summary_csv: Path,
    voice_prompt_audio_path: Path,
    selected_ids: set[str] | None = None,
    device: str = "cuda",
    t3_model: str = "v3",
    model_loader: Any | None = None,
    wav_writer: Any | None = None,
    duration_reader: Any | None = None,
    fail_fast: bool = False,
) -> list[dict[str, object]]:
    rows = read_rows(input_csv, selected_ids)
    if not rows:
        raise ValueError(f"No rows selected from {input_csv}")

    output_dir.mkdir(parents=True, exist_ok=True)
    provider = ChatterboxPraxyTTSProvider(
        output_audio_path=output_dir / "placeholder.wav",
        voice_prompt_audio_path=voice_prompt_audio_path,
        device=device,
        t3_model=t3_model,
        model_loader=model_loader,
        wav_writer=wav_writer,
        duration_reader=duration_reader,
    )
    summary_rows: list[dict[str, object]] = []

    for index, row in enumerate(rows, start=1):
        bench_id = row["id"]
        wav_path = output_dir / f"{bench_id}_praxy_text_v2.wav"
        print(f"[{index}/{len(rows)}] {bench_id} -> {wav_path}", flush=True)
        try:
            provider.output_audio_path = wav_path
            result = provider.synthesize(
                SpeechToSpeechRequest(
                    request_id=f"{bench_id}_tts_text_v2",
                    audio_path=Path(row.get("audio_path", "")),
                ),
                ReplyResult(
                    text_urdu=row.get("assistant_reply_urdu", ""),
                    provider="text_csv",
                    model="s2s_live_text_v2",
                ),
                BridgeResult(
                    text_devanagari=row.get("devanagari_tts_text", ""),
                    provider="text_csv",
                    model="s2s_live_text_v2",
                ),
            )
            summary_rows.append(
                {
                    "id": bench_id,
                    "status": "ok",
                    "assistant_reply_urdu": row.get("assistant_reply_urdu", ""),
                    "devanagari_tts_text": row.get("devanagari_tts_text", ""),
                    "tts_audio_path": str(result.audio_path),
                    "duration_seconds": result.duration_seconds,
                    "error": "",
                }
            )
        except Exception as exc:  # noqa: BLE001 - batch runner should report row failures.
            error = "".join(traceback.format_exception_only(type(exc), exc)).strip()
            print(f"[{bench_id}] ERROR: {error}", flush=True)
            summary_rows.append(
                {
                    "id": bench_id,
                    "status": "error",
                    "assistant_reply_urdu": row.get("assistant_reply_urdu", ""),
                    "devanagari_tts_text": row.get("devanagari_tts_text", ""),
                    "tts_audio_path": str(wav_path),
                    "error": error,
                }
            )
            if fail_fast:
                break

    write_summary(summary_csv, summary_rows)
    return summary_rows


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser()
    parser.add_argument("--input-csv", type=Path, default=DEFAULT_INPUT_CSV)
    parser.add_argument("--output-dir", type=Path, default=DEFAULT_OUTPUT_DIR)
    parser.add_argument("--summary-csv", type=Path, default=DEFAULT_SUMMARY_CSV)
    parser.add_argument("--ids", default="", help="Comma-separated IDs. Defaults to all rows.")
    parser.add_argument("--voice-prompt-audio-path", type=Path, default=DEFAULT_PRAXY_ANCHOR)
    parser.add_argument("--device", default="cuda")
    parser.add_argument("--chatterbox-t3-model", default="v3")
    parser.add_argument("--fail-fast", action="store_true")
    return parser.parse_args()


def main() -> int:
    args = parse_args()
    summary_rows = run_tts_rows(
        input_csv=resolve_repo_path(args.input_csv),
        output_dir=resolve_repo_path(args.output_dir),
        summary_csv=resolve_repo_path(args.summary_csv),
        voice_prompt_audio_path=resolve_repo_path(args.voice_prompt_audio_path),
        selected_ids=parse_ids(args.ids),
        device=args.device,
        t3_model=args.chatterbox_t3_model,
        fail_fast=args.fail_fast,
    )
    ok_count = sum(1 for row in summary_rows if row["status"] == "ok")
    print(f"summary={resolve_repo_path(args.summary_csv)}")
    print(f"ok={ok_count} total={len(summary_rows)}")
    return 0 if ok_count == len(summary_rows) else 1


if __name__ == "__main__":
    raise SystemExit(main())