"""Run scheduler in incremental mode: only current/latest season per league."""

from __future__ import annotations

import os
from typing import Dict, List

from databank.db import MongoDB
from databank.reporter.daily_file import DailyFileReporter
from databank.spiders.get_league_match_list import GetLeagueMatchListSpider
from databank.spiders.base import BaseSpider
from databank.scheduler.orchestrator import DatabankScheduler, TaskProvider
from databank.tasks.providers import league_matchlist_from_mongo
from databank.analytics.simple_counts import PerTokenCounter


essential_env = {
    "DATABANK_DB_URI": "mongodb://localhost:27017",
    "DATABANK_DB_NAME": "databank",
}


def main() -> None:
    """Entry point: run the scheduler in incremental mode (latest season only)."""
    uri = os.getenv("DATABANK_DB_URI", essential_env["DATABANK_DB_URI"])
    name = os.getenv("DATABANK_DB_NAME", essential_env["DATABANK_DB_NAME"])

    db = MongoDB(uri=uri, name=name)
    db.connect()

    # Spiders
    get_match = GetLeagueMatchListSpider()
    spiders: List[BaseSpider] = [get_match]

    # Reporters
    reporters = [DailyFileReporter(timezone="utc+8")]

    # Task providers wiring (incremental)
    provider = league_matchlist_from_mongo(mode="incremental")
    tasks_provider: Dict[BaseSpider, TaskProvider] = {get_match: provider}

    # Preflight: generate tasks once to validate seeds/config
    preview_tasks = provider(get_match, db)
    if not preview_tasks:
        print(
            "No tasks generated (incremental mode). "
            "Please ensure MongoDB has seeds in 'leagues' and 'seasons'."
        )
        print(
            "Try seeding first: python scripts/seed_leagues_mongo.py "
            "and python scripts/seed_seasons_mongo.py"
        )
        return
    else:
        print(
            f"Prepared {len(preview_tasks)} task(s) for incremental run "
            f"(showing up to 3):"
        )
        for t in preview_tasks[:3]:
            token = t.token() if hasattr(t, "token") else str(t)
            print(" -", token)

    # Analyzers
    analyzers = [PerTokenCounter()]

    scheduler = DatabankScheduler(
        db=db,
        spiders=spiders,
        reporters=reporters,
        task_providers=tasks_provider,
        analyzers=analyzers,
    )

    summary = scheduler.run_once()
    print("Scheduler(incremental) finished. Total persisted:", summary.total_docs)
    if summary.total_docs == 0:
        # Diagnostics: inspect returned docs to explain why nothing persisted
        docs = scheduler.get_last_docs() if hasattr(scheduler, "get_last_docs") else []
        kinds = {}
        for d in docs:
            kinds[d.kind] = kinds.get(d.kind, 0) + 1
        if kinds:
            print("Returned document kinds:", kinds)
            # Show first few error reasons if present
            errs = [d for d in docs if d.kind == "error"]
            if errs:
                preview = errs[:3]
                print("Sample errors (up to 3):")
                for e in preview:
                    reason = e.data.get("reason") if isinstance(e.data, dict) else None
                    detail = e.data.get("detail") if isinstance(e.data, dict) else None
                    print(" -", reason, ":", detail)
        else:
            print(
                "Runner produced no documents. "
                "Check network/API accessibility and spider filters."
            )
        print(
            "Note: Spider filters keep only groupName='联赛' and "
            "elapsedTime='已完场', and skip future-dated matches."
        )


if __name__ == "__main__":
    main()