//
//  Queries.swift
//  TournamentStats
//
//  Created by Laurent Morvillier on 03/06/2019.
//  Copyright © 2019 Stax River. All rights reserved.
//

import Foundation
import RealmSwift
import Realm

class Queries {
    
    static func biggestWinners(realm: Realm) -> [CumulatedResults] {
        
        let players = realm.objects(Player.self)
        var crArray: [CumulatedResults] = []
        
        for player in players {
            crArray.append(CumulatedResults(player: player))
        }
        
        return crArray.sorted(by: { (cr1, cr2) -> Bool in
            return cr1.total > cr2.total
        })
    }
    
    static func mostCashes(realm: Realm) -> [CumulatedResults] {
        
        let players = realm.objects(Player.self)
        var crArray: [CumulatedResults] = []
        
        for player in players {
            crArray.append(CumulatedResults(player: player))
        }
        
        return crArray.sorted(by: { (cr1, cr2) -> Bool in
            if cr1.numberOfCashes == cr2.numberOfCashes {
                return cr1.total > cr2.total
            }
            return cr1.numberOfCashes > cr2.numberOfCashes
        })
    }

    static func allWinnersSortedByEvent(realm: Realm, date: Date? = nil) -> [TournamentWinner] {
        
        let winners: Results<Result>
        if let day = date {
            winners = realm.objects(Result.self).filter("rank == 1 && ANY tournaments.date IN %@", [day])
        } else {
            winners = realm.objects(Result.self).filter("rank == 1")
        }

        var tws: [TournamentWinner] = []
        
        for w in winners {
            let tw = TournamentWinner(tournament: w.tournaments.first!, result: w)
            tws.append(tw)
        }
        
        tws.sort { (tw1, tw2) -> Bool in
            tw1.tournament.number < tw2.tournament.number
        }
        
        return tws
    }
    
    static func notableCashes(realm: Realm, date: Date) -> [PlayerResult] {
        
        let notableCashes: Results<Result> = realm.objects(Result.self).filter("player.notable = true && ANY tournaments.date IN %@", [date])
        
        var prs: [PlayerResult] = []
        
        for nc in notableCashes {
            let pr = PlayerResult(tournament: nc.tournaments.first!, result: nc)
            prs.append(pr)
        }
        
        prs.sort { (pr1, pr2) -> Bool in
            if pr1.result.rank == pr2.result.rank {
                return pr1.result.earnings > pr2.result.earnings
            }
            return pr1.result.rank < pr2.result.rank
        }
        
        return prs
    }

    static func sortedEvents(realm: Realm, fieldName: String, ascending: Bool) -> [TournamentRepresentable] {
        let tournies = realm.objects(Tournament.self).sorted(byKeyPath: fieldName, ascending: ascending)
        var trs: [TournamentRepresentable] = []
        for tourny in tournies {
            trs.append(TournamentRepresentable(tournament: tourny))
        }
        return trs
    }
    
    static func cashesByCountry(realm: Realm) -> [CountryCashes] {
        let playerDistinctCountries = realm.objects(Player.self).distinct(by: ["country"])
        var countryCashes: [CountryCashes] = []
        
        for player in playerDistinctCountries {
            let country = player.country
            let resultsByCountry = realm.objects(Result.self).filter("player.country == %@", country)
            
            let cc = CountryCashes(country: country, cashes: resultsByCountry.count)
            countryCashes.append(cc)
            
        }
        
        countryCashes.sort { (cc1, cc2) -> Bool in
            return cc1.cashes > cc2.cashes
        }
        
        return countryCashes
    }
    
}