// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// uistate contains the UIState struct that holds all variables relevant to creating and updating the app UI
// uistate also contains View, which defines different UI views

package uistate

import (
	"encoding/json"
	"fmt"
	"sync"
	"time"

	"hearts/img/coords"
	"hearts/img/staticimg"
	"hearts/logic/card"
	"hearts/logic/table"

	"golang.org/x/mobile/exp/gl/glutil"
	"golang.org/x/mobile/exp/sprite"

	"v.io/v23/context"
	"v.io/v23/syncbase"
)

type View string

const (
	None      View = "None"
	Arrange   View = "Arrange"
	Discovery View = "Discovery"
	Pass      View = "Pass"
	Take      View = "Take"
	Table     View = "Table"
	Play      View = "Play"
	Score     View = "Score"
	Split     View = "Split"
)

const (
	Avatar string = "avatar"
	Name   string = "name"
	Device string = "device"
)

const (
	numPlayers    int     = 4
	numSuits      int     = 4
	cardSize      float32 = 35
	cardScaler    float32 = .5
	topPadding    float32 = 15
	bottomPadding float32 = 5
)

type UIState struct {
	StartTime time.Time
	Images    *glutil.Images
	Eng       sprite.Engine
	Scene     *sprite.Node
	// the following arrays keep track of all displayed images
	Cards          []*card.Card
	TableCards     []*card.Card
	BackgroundImgs []*staticimg.StaticImg
	EmptySuitImgs  []*staticimg.StaticImg
	DropTargets    []*staticimg.StaticImg
	Buttons        map[string]*staticimg.StaticImg
	Other          []*staticimg.StaticImg
	ModText        []*staticimg.StaticImg
	RoundScores    []int                // the scores of the most recently finished round
	Winners        []int                // the list of players, if any, who have won
	CardToPlay     *card.Card           // the card, if any, curPlayer has decided to play before their turn
	CurCard        *card.Card           // the card that is currently clicked on
	CurImg         *staticimg.StaticImg // the image that is currently clicked on
	// lastMouseXY is in Px: divide by pixelsPerPt to get Pt
	LastMouseXY *coords.Vec // the position of the mouse in the most recent frame
	NumPlayers  int
	NumSuits    int
	// the following variables are used for sizing and positioning specifications
	CardSize         float32
	CardScaler       float32
	TopPadding       float32
	BottomPadding    float32
	WindowSize       *coords.Vec // windowSize is in Pt
	CardDim          *coords.Vec
	TableCardDim     *coords.Vec
	PlayerIconDim    *coords.Vec
	PixelsPerPt      float32
	Overlap          *coords.Vec
	Padding          float32
	CurView          View                     // the screen currently being shown to the user
	ViewOnTouch      View                     // the view at the beginning of a touch action
	CurTable         *table.Table             // the table of the current game
	Done             bool                     // true if the app has been quit
	Texs             map[string]sprite.SubTex // map of all loaded images
	CurPlayerIndex   int                      // the player number of this player
	Ctx              *context.T
	Service          syncbase.Service
	LogSG            string                         // name of the game log syncgroup the user is currently in
	Debug            bool                           // true if debugging, adds extra functionality to switch between players
	SequentialPhases bool                           // true if trying to match Croupier Flutter Pass -> Take -> Play phase system
	SwitchingViews   bool                           // true if currently animating between play and split views
	Shutdown         func()                         // used to shut down a v23.Init()
	GameID           int                            // used to differentiate between concurrent games
	IsOwner          bool                           // true if this player is the game creator
	UserData         map[int]map[string]interface{} // user data indexed by user ID
	PlayerData       map[int]int                    // key = player number, value = user id
	AnimChans        []chan bool                    // keeps track of all 'quit' channels in animations so their goroutines can be stopped
	SGChan           chan bool                      // pass in a bool to stop advertising the syncgroup
	ScanChan         chan bool                      // pass in a bool to stop scanning for syncgroups
	GameChan         chan bool                      // pass in a bool to stop receiving updates from the current game
	DiscGroups       map[string]*DiscStruct         // contains a set of addresses and game start data for each advertised game found
	M                sync.Mutex
}

func MakeUIState() *UIState {
	return &UIState{
		StartTime:        time.Now(),
		Cards:            make([]*card.Card, 0),
		TableCards:       make([]*card.Card, 0),
		BackgroundImgs:   make([]*staticimg.StaticImg, 0),
		EmptySuitImgs:    make([]*staticimg.StaticImg, 0),
		DropTargets:      make([]*staticimg.StaticImg, 0),
		Buttons:          make(map[string]*staticimg.StaticImg),
		Other:            make([]*staticimg.StaticImg, 0),
		ModText:          make([]*staticimg.StaticImg, 0),
		RoundScores:      make([]int, numPlayers),
		LastMouseXY:      coords.MakeVec(-1, -1),
		NumPlayers:       numPlayers,
		NumSuits:         numSuits,
		CardSize:         cardSize,
		CardScaler:       cardScaler,
		TopPadding:       topPadding,
		BottomPadding:    bottomPadding,
		WindowSize:       coords.MakeVec(-1, -1),
		CardDim:          coords.MakeVec(cardSize, cardSize),
		TableCardDim:     coords.MakeVec(cardSize*cardScaler, cardSize*cardScaler),
		PlayerIconDim:    coords.MakeVec(2*cardSize/3, 2*cardSize/3),
		Overlap:          coords.MakeVec(3*cardSize*cardScaler/4, 3*cardSize*cardScaler/4),
		Padding:          float32(5),
		CurView:          None,
		Done:             false,
		Debug:            false,
		SequentialPhases: true,
		SwitchingViews:   false,
		UserData:         make(map[int]map[string]interface{}),
		PlayerData:       make(map[int]int),
		AnimChans:        make([]chan bool, 0),
		DiscGroups:       make(map[string]*DiscStruct),
		CurPlayerIndex:   -1,
	}
}

func GetAvatar(playerNum int, u *UIState) sprite.SubTex {
	blankTex := u.Texs["Heart.png"]
	userID := u.PlayerData[playerNum]
	if u.UserData[userID][Avatar] == nil {
		return blankTex
	}
	return u.Texs[u.UserData[userID][Avatar].(string)]
}

func GetName(playerNum int, u *UIState) string {
	emptyString := ""
	userID := u.PlayerData[playerNum]
	if u.UserData[userID][Name] == nil {
		return emptyString
	}
	return u.UserData[userID][Name].(string)
}

func GetDevice(playerNum int, u *UIState) sprite.SubTex {
	blankTex := u.Texs["laptop.png"]
	userID := u.PlayerData[playerNum]
	if u.UserData[userID][Device] == nil {
		return blankTex
	}
	return u.Texs[u.UserData[userID][Device].(string)]
}

type DiscStruct struct {
	SettingsAddr  string
	LogAddr       string
	GameStartData map[string]interface{}
}

func MakeDiscStruct(s, l, g string) *DiscStruct {
	gameStartData := []byte(g)
	var dataMap map[string]interface{}
	err := json.Unmarshal(gameStartData, &dataMap)
	if err != nil {
		fmt.Println("Unmarshal error:", err)
	}
	return &DiscStruct{
		SettingsAddr:  s,
		LogAddr:       l,
		GameStartData: dataMap,
	}
}