//
//  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 festivalStats(realm: Realm) -> FestivalStats {
        
        let tournaments = realm.objects(Tournament.self)

        let stats = FestivalStats()
        stats.cumulatedBuyins = tournaments.sum(ofProperty: "buyin")
        stats.totalEntries = tournaments.sum(ofProperty: "entries")
        stats.totalPrizePool = tournaments.sum(ofProperty: "prizepool")
        stats.eventsCount = tournaments.count
        
        return stats
    }
    
    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 averageCash(realm: Realm, minCount: Int) -> [CumulatedResults] {
        
        let players = realm.objects(Player.self).filter(NSPredicate(format: "results.@count >= %i", minCount))
        var crArray: [CumulatedResults] = []
        
        for player in players {
            crArray.append(CumulatedResults(player: player, options: [.average]))
        }
        
        return crArray.sorted(by: { (cr1, cr2) -> Bool in
            return cr1.total > cr2.total
        })
    }
    
    static func mostCashes(realm: Realm, notable: Bool = false) -> [CumulatedResults] {
        
        var  players = realm.objects(Player.self)
        if (notable) {
            players = players.filter("notable = true")
        }
        var crArray: [CumulatedResults] = []
        
        for player in players {
            crArray.append(CumulatedResults(player: player, options: [.countSorted]))
        }
        
        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 mostWins(realm: Realm) -> [CumulatedWins] {
        
        var crArray: [CumulatedWins] = []
        for player in realm.objects(Player.self) {
            crArray.append(CumulatedWins(player: player))
        }
        
        crArray = crArray.filter { $0.winsCount > 0 }
        return  crArray.sorted(by: { (cr1, cr2) -> Bool in
            if cr1.winsCount == cr2.winsCount {
                return cr1.numberOfCashes > cr2.numberOfCashes
            }
            return cr1.winsCount > cr2.winsCount
        })
    }
    
    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) -> [CountryCounter] {
        let playerDistinctCountries = realm.objects(Player.self).distinct(by: ["country"])
        var countryCashes: [CountryCounter] = []
        
        for player in playerDistinctCountries {
            let country = player.country
            let resultsByCountry = realm.objects(Result.self).filter("player.country == %@", country)
            
            let cc = CountryCounter(country: country, counter: resultsByCountry.count)
            countryCashes.append(cc)
            
        }
        
        countryCashes.sort { (cc1, cc2) -> Bool in
            return cc1.counter > cc2.counter
        }
        
        return countryCashes
    }
    
    static func winsByCountry(realm: Realm) -> [CountryCounter] {
        
        let winners: Results<Result> = realm.objects(Result.self).filter("rank == 1")
        var countryWins: [String : CountryCounter] = [:]
        for winner in winners {
            
            if let country = winner.player?.country {
                if let cc = countryWins[country] {
                    cc.increment()
                } else {
                    countryWins[country] = CountryCounter(country: country, counter: 1)
                }
            }
        }
        
        var sortedCountries = countryWins.values.map { $0 }
        
        sortedCountries.sort { (cc1, cc2) -> Bool in
            return cc1.counter > cc2.counter
        }
        
        return sortedCountries
    }
    
    static func averageEvent(realm: Realm) -> [TournamentStats] {
        
        let tournaments: Results<Tournament> = realm.objects(Tournament.self)
        let entries: Double? = tournaments.average(ofProperty: "entries")
        let buyin: Double? = tournaments.average(ofProperty: "buyin")
        let prizepool: Double? = tournaments.average(ofProperty: "prizepool")
        
        let winnerResults = tournaments.compactMap { (tournament) -> Result? in
            return tournament.results.first { $0.rank == 1 }
        }
        let averageFirstPrize = winnerResults.reduce(0.0) { $0 + Double($1.earnings) } / Double(tournaments.count)
        
        if let entries = entries, let buyin = buyin, let prizepool = prizepool {
            let ts = TournamentStats(entries: entries, buyin: buyin, prizepool: prizepool, firstPrize: averageFirstPrize)
            return [ts]
        }
        
        return []
    }
    
    static func tournamentBuyinDistribution(realm: Realm) -> [DistributionCounter] {
        
        let tournaments: Results<Tournament> = realm.objects(Tournament.self)
        
        let verylow = DistributionCounter(name: "<$1,000")
        let low = DistributionCounter(name: "$1,000 - $1,999")
        let medium = DistributionCounter(name: "$2,000 - $5,000")
        let high = DistributionCounter(name: ">$5,000")
        let counters: [DistributionCounter] = [verylow, low, medium, high]
        
        tournaments.forEach { tournament in
            switch tournament.buyin {
            case 0..<1000:
                verylow.increment()
            case 1000..<2000:
                low.increment()
            case 2000...5000:
                medium.increment()
            default:
                high.increment()
            }
        }
        return counters
    }
    
    static func tournamentPrizepoolDistribution(realm: Realm) -> [DistributionCounter] {
        
        let tournaments: Results<Tournament> = realm.objects(Tournament.self)
        
        let low = DistributionCounter(name: "<$1M)")
        let medium = DistributionCounter(name: "$1M - $5M")
        let high = DistributionCounter(name: ">5M")
        let counters: [DistributionCounter] = [low, medium, high]
        
        tournaments.forEach { tournament in
            switch tournament.prizepool {
            case 0.0..<1000000.0:
                low.increment()
            case 1000000.0...5000000.0:
                medium.increment()
            default:
                high.increment()
            }
        }
        return counters
    }
    
    static func firstPrizeDistribution(realm: Realm) -> [DistributionCounter] {
        
        let winnerResults = realm.objects(Result.self).filter("rank == 1")
        
        let low = DistributionCounter(name: "<$250K")
        let medium = DistributionCounter(name: "$250K - $1M")
        let high = DistributionCounter(name: ">$1M")
        let counters: [DistributionCounter] = [low, medium, high]
        
        winnerResults.forEach { result in
            switch result.earnings {
            case 0.0..<250000.0:
                low.increment()
            case 250000.0...1000000.0:
                medium.increment()
            default:
                high.increment()
            }
        }
        return counters
    }
    
    static func gamesDistribution(realm: Realm) -> [DistributionCounter] {
        
        let tournaments: Results<Tournament> = realm.objects(Tournament.self)
        
        let noLimitHoldem = DistributionCounter(name: Game.holdem.rawValue)
        let potLimitOmaha = DistributionCounter(name: Game.omaha.rawValue)
        let not = DistributionCounter(name: "Others")
        let games: [DistributionCounter] = [noLimitHoldem, potLimitOmaha, not]
        
        tournaments.forEach { tournament in
            if tournament.name.contains(Game.holdem.rawValue) {
                noLimitHoldem.increment()
            } else if tournament.name.contains(Game.omaha.rawValue) {
                potLimitOmaha.increment()
            } else {
                not.increment()
            }
            
        }
        return games
    }
    
    static func tableSizeDistribution(realm: Realm) -> [DistributionCounter] {
        
        let tournaments: Results<Tournament> = realm.objects(Tournament.self).filter("name CONTAINS %@", "No-Limit Hold'em").distinct(by: ["tableSize"])
        var slices: [DistributionCounter] = []
        var othersCount: Int = 0
        for tournament in tournaments {
            let tableSizeCount = realm.objects(Tournament.self).filter("name CONTAINS %@", "No-Limit Hold'em").filter("tableSize == %i", tournament.tableSize).count
            if (tableSizeCount < 6) {
                othersCount += tableSizeCount
            } else {
                let counter = DistributionCounter(name: TableSize.format(tableSize: tournament.tableSize), counter: tableSizeCount)
                slices.append(counter)
            }
        }
        let others = DistributionCounter(name: "Others", counter: othersCount)
        slices.append(others)
        
        slices.sort { (d1, d2) -> Bool in
            return d1.counter > d2.counter
        }
        return slices
    }
    
    static func rankingCounts(realm: Realm) -> [PlayerNotableFinishes] {
        
        let players: Results<Player> = realm.objects(Player.self)
        
        var notableFinishes: [PlayerNotableFinishes] = []
        
        players.forEach { player in
            
            var wins: [Result] = []
            var runnerUps: [Result] = []
            var finalTables: [Result] = []

            player.results.forEach { result in
                switch result.rank {
                case 1:
                    wins.append(result)
                case 2:
                    runnerUps.append(result)
                default:
                    break
                }
                let tableSize: Int = result.tournaments.first?.tableSize ?? 9
                if result.rank <= tableSize {
                    finalTables.append(result)
                }
            }

            notableFinishes.append(PlayerNotableFinishes(player: player, wins: wins, runnerUps: runnerUps, finalTables: finalTables))
            
        }
        
        return notableFinishes
    }
    
}