"""Orchestrator + click CLI for the examples ingest pipeline.

`ingest_subreddit(...)` is the testable async unit: fetch → filter →
extract (Tier 1+2) → upsert → return (inserted, skipped) counts.

`ingest_all(...)` fans out across the 12 target subreddits with
`asyncio.gather(..., return_exceptions=True)` so a single sub's failure
doesn't sink the others. Job exits 0 when >=half succeed, else exits 2.

The click commands at the bottom of the file are the entrypoints the
K8s Job + CronJob use.
"""
from __future__ import annotations

import asyncio
import logging
import os
from datetime import date
from decimal import Decimal
from typing import Any, cast

import asyncpraw
import click
import httpx

from fire_planner.db import create_engine_from_env, make_session_factory
from fire_planner.examples.filters import is_candidate
from fire_planner.examples.llm_extract import extract_with_fallback
from fire_planner.examples.praw_source import TopWhen, fetch_top
from fire_planner.examples.service import upsert_example
from fire_planner.fx import fetch_rates

log = logging.getLogger(__name__)

DEFAULT_SUBS: list[str] = [
    "financialindependence", "leanfire", "fatFIRE", "coastFIRE",
    "baristaFIRE", "ExpatFIRE", "EuropeFIRE", "FIRE_Ind",
    "AusFinance", "CanadianFIRE", "UKPersonalFinance",
    "financialindependence_UK",
]


async def ingest_subreddit(
    session: Any,
    reddit: Any,
    *,
    sub: str,
    when: TopWhen,
    limit: int,
    llama_url: str,
    claude_url: str,
    claude_bearer: str,
    client: httpx.AsyncClient,
    fx_rates: dict[str, Decimal],
) -> tuple[int, int]:
    inserted = 0
    skipped = 0
    async for post in fetch_top(reddit, sub, when, limit=limit):
        if not is_candidate(post):
            skipped += 1
            continue
        extracted = await extract_with_fallback(
            post,
            llama_url=llama_url,
            claude_url=claude_url,
            claude_bearer=claude_bearer,
            client=client,
        )
        if extracted is None:
            log.info("dropping %s — both LLM tiers failed", post.reddit_id)
            skipped += 1
            continue
        did_insert = await upsert_example(session, post, extracted, fx_rates)
        if did_insert:
            inserted += 1
        else:
            skipped += 1
    return inserted, skipped


async def _ingest_all(
    when_list: list[TopWhen],
    limit: int,
    subs: list[str],
) -> tuple[int, int, int]:
    engine = create_engine_from_env()
    factory = make_session_factory(engine)
    rates = await fetch_rates(date.today())

    reddit = asyncpraw.Reddit(
        client_id=os.environ["REDDIT_CLIENT_ID"],
        client_secret=os.environ["REDDIT_CLIENT_SECRET"],
        user_agent=os.environ.get("REDDIT_USER_AGENT", "fire-planner/0.1"),
    )
    llama_url = os.environ["LLAMA_CPP_BASE_URL"]
    claude_url = os.environ["CLAUDE_AGENT_SERVICE_URL"]
    claude_bearer = os.environ["CLAUDE_AGENT_BEARER"]

    async def _one(sub: str, when: TopWhen) -> tuple[int, int]:
        async with factory() as session, httpx.AsyncClient() as client:
            return await ingest_subreddit(
                session, reddit,
                sub=sub, when=when, limit=limit,
                llama_url=llama_url,
                claude_url=claude_url,
                claude_bearer=claude_bearer,
                client=client,
                fx_rates=rates,
            )

    tasks = [_one(s, w) for s in subs for w in when_list]
    results = await asyncio.gather(*tasks, return_exceptions=True)
    await reddit.close()
    await engine.dispose()

    n_succ = sum(1 for r in results if not isinstance(r, Exception))
    total_inserted = sum(r[0] for r in results if isinstance(r, tuple))
    total_skipped = sum(r[1] for r in results if isinstance(r, tuple))
    return total_inserted, total_skipped, n_succ


@click.group(name="examples")
def examples_cli() -> None:
    """Reddit FIRE examples ingest commands."""


@examples_cli.command("ingest")
@click.option("--top", "top_csv", default="all,year",
              help="Comma-list of top-of-X windows (all,year,week).")
@click.option("--limit", default=1000, show_default=True)
@click.option("--sub", "subs_csv", default=None,
              help="Comma-list of subs (default: all 12).")
def ingest_cmd(top_csv: str, limit: int, subs_csv: str | None) -> None:
    """Bulk one-shot ingest. Used by the K8s Job."""
    logging.basicConfig(level=os.environ.get("LOG_LEVEL", "INFO"))
    # click hands us free-form strings; narrow to TopWhen at the boundary.
    # Invalid values surface as an asyncpraw API error rather than a type error.
    when_list = cast(
        list[TopWhen],
        [w.strip() for w in top_csv.split(",") if w.strip()],
    )
    subs = [s.strip() for s in subs_csv.split(",")] if subs_csv else DEFAULT_SUBS

    inserted, skipped, succ = asyncio.run(_ingest_all(when_list, limit, subs))
    total = len(subs) * len(when_list)
    log.info("ingest done: inserted=%d skipped=%d sub_runs_succ=%d/%d",
             inserted, skipped, succ, total)

    # Exit 2 if fewer than half the (sub, when) pairs succeeded.
    if succ < (total // 2 + 1):
        raise click.exceptions.Exit(code=2)