from douzero.server.orm import Model, Battle, Baseline
from douzero.server.battle import tick
from flask import Flask, jsonify, request
from flask_cors import CORS
from datetime import datetime
from concurrent.futures import ThreadPoolExecutor

app = Flask(__name__)
CORS(app)

Model.create_table()
Battle.create_table()
Baseline.create_table()
positions = ['landlord', 'landlord_up', 'landlord_front', 'landlord_down']

threadpool = ThreadPoolExecutor(1)

@app.route('/upload', methods=['POST'])
def upload():
    type = request.form.get('type')
    if type not in ['lite_resnet', 'lite_vanilla', 'legacy_vanilla']:
        return jsonify({'status': -1, 'message': 'illegal type'})
    position = request.form.get("position")
    if position not in positions:
        return jsonify({'status': -2, 'message': 'illegal position'})
    frame = int(request.form.get("frame"))
    model_file = request.files.get('model_file')
    if model_file is None:
        return jsonify({'status': -3, 'message': 'illegal model_file'})
    path = "baselines_server/%s_%s_%d.ckpt" % (type, position, frame)
    model = Model.get_or_none(Model.path == path)
    if model is None:
        model_file.save(path)
        Model.create(path=path, position=position,type=type,frame=frame,create_time=datetime.now())
        Battle.create(challenger_path=path, challenger_position=position, status=0)
    threadpool.submit(tick)
    return jsonify({'status': 0, 'message': 'success', 'result': ''})

@app.route('/battle_tick', methods=['POST'])
def battle_tick():
    tick()
    return jsonify({'status': 0, 'message': 'success', 'result': ''})

@app.route('/metrics', methods=['GET'])
def metrics():
    type = request.args.get('type')
    baselines = Baseline.select().order_by(Baseline.rank.desc()).limit(3)
    end_time = datetime.now()
    metrics = {}
    for i in range(len(baselines)):
        baseline = baselines[i]
        baseline_metric = {}
        models = Model.select(Model.frame, Model.path).where(
            Model.type == type,
            Model.create_time >= baseline.create_time,
            Model.create_time >= end_time
        ).order_by(Model.create_time.asc())
        end_time = baseline.create_time
        for model in models:
            battle = Battle.get_or_none(Battle.challenger_path == model.path, Battle.status > 0, Battle.status != 3)
            if battle is not None:
                baseline_metric[model.frame] = {
                    'position': battle.challenger_position,
                    'wp': '%.4f' % float(battle.challenger_wp),
                    'adp': '%.4f' % float(battle.challenger_adp)
                }
        metrics[baseline.rank] = baseline_metric
    return jsonify({'status': 0, 'message': 'success', 'result': metrics})

if __name__ == '__main__':
    import argparse
    parser = argparse.ArgumentParser(description='DouZero evaluation backend')
    parser.add_argument('--debug', action='store_true')
    args = parser.parse_args()
    app.run(debug=args.debug, host="0.0.0.0")