package main

import (
	"bufio"
	"fmt"
	"github.com/stretchr/testify/assert"
	"os"
	"testing"
)

func TestSimulation_SimulateOneInitialWord(t *testing.T) {
	type fields struct {
		Words []string
	}
	type args struct {
		initialWord string
	}
	tests := []struct {
		name              string
		words             []string
		fields            fields
		args              args
		wantedLossCount   int
		wantedMaxRounds   int
		wantedTotalRounds int
	}{
		{
			name:  "simple game with no losses",
			words: []string{"aaa", "aab", "abb"},
			args: args{
				initialWord: "aaa",
			},
			wantedLossCount:   0,
			wantedMaxRounds:   2,
			wantedTotalRounds: 5,
		},
		{
			name:  "simple failed game",
			words: []string{"aaa", "aab", "aac", "aad", "aae"},
			args: args{
				initialWord: "aaa",
			},
			wantedLossCount:   1,
			wantedMaxRounds:   5,
			wantedTotalRounds: 15,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {

			game := &Game{}
			game.Words = make(map[string]*Word)
			for _, word := range tt.words {
				game.Words[word] = &Word{Word: word}
			}

			s := Simulation{
				Game: game,
			}

			lossCount, maxRounds, totalRounds := s.SimulateOneInitialWord(game, tt.args.initialWord)
			assert.Equalf(t, tt.wantedLossCount, lossCount, "loss count for %v => %v", game, tt.args.initialWord)
			assert.Equalf(t, tt.wantedMaxRounds, maxRounds, "max rounds for %v => %v)", game, tt.args.initialWord)
			assert.Equalf(t, tt.wantedTotalRounds, totalRounds, "total rounds for %v => %v)", game, tt.args.initialWord)
		})
	}
}

func TestSimulation_SimulateOneGame(t *testing.T) {
	type fields struct {
		BestGuess       string
		BestGuessRounds int
		SuccessCount    int
		FailCount       int
		TotalRounds     int
	}
	type args struct {
		initialWord string
		answer      string
	}
	tests := []struct {
		name      string
		words     []string
		fields    fields
		args      args
		won       bool
		numRounds int
	}{

		{
			name:  "initial word is answer",
			words: []string{"aaa", "aab", "abb"},
			args: args{
				initialWord: "aaa",
				answer:      "aaa",
			},
			won:       true,
			numRounds: 1,
		},
		{
			name:  "one guess to get answer",
			words: []string{"aaa", "aab", "abb"},
			args: args{
				initialWord: "aaa",
				answer:      "aab",
			},
			won:       true,
			numRounds: 2,
		},
		{
			name:  "one guess to get answer",
			words: []string{"aaa", "aab", "aac", "aad", "aae"},
			args: args{
				initialWord: "aaa",
				answer:      "aae",
			},
			won:       false,
			numRounds: 5,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {

			game := &Game{}
			game.Words = make(map[string]*Word)
			for _, word := range tt.words {
				game.Words[word] = &Word{Word: word}
			}

			s := NewSimulator(*game)

			got, got1 := s.SimulateOneGame(game, tt.args.initialWord, tt.args.answer)
			assert.Equalf(t, tt.won, got, "SimulateOneGame(%v, %v, %v)", game, tt.args.initialWord, tt.args.answer)
			assert.Equalf(t, tt.numRounds, got1, "SimulateOneGame(%v, %v, %v)", game, tt.args.initialWord, tt.args.answer)
		})
	}
}

func TestSimulation_SimulateAllPossibleGames(t *testing.T) {
	tests := []struct {
		name    string
		words   []string
		want    string
		wantErr assert.ErrorAssertionFunc
	}{
		{
			name:    "simple game with no losses",
			words:   []string{"aaa", "aab", "aac", "aad", "aae"},
			want:    "aaa",
			wantErr: assert.NoError,
		},
		{
			name:    "simple game with no losses",
			words:   []string{"hazards", "hurting", "manages", "varying", "gabbing", "packing", "warring", "cantina", "caravan", "gangers", "falling", "waiting", "screens", "happens", "largest", "lawless", "dangers", "variety"},
			want:    "warring",
			wantErr: assert.NoError,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {

			game := &Game{}
			game.Words = make(map[string]*Word)
			for _, word := range tt.words {
				game.Words[word] = &Word{Word: word}
			}
			s := NewSimulator(*game)

			got, err := s.SimulateAllPossibleGames()
			if !tt.wantErr(t, err, fmt.Sprintf("SimulateAllPossibleGames()")) {
				return
			}
			assert.Equalf(t, tt.want, got, "SimulateAllPossibleGames()")
		})
	}
}

func TestSimulation_SimulateAllPossibleGamesFromGameLog(t *testing.T) {

	file, err := os.Open("games.txt")
	if err != nil {
		t.Fatalf("Error opening file: %s", err)
	}
	defer func(file *os.File) {
		err := file.Close()
		if err != nil {
			t.Fatalf("Error closing file: %s", err)
		}
	}(file)

	var words []string

	scanner := bufio.NewScanner(file)
	for scanner.Scan() {
		line := scanner.Text()
		fmt.Println(line)

		if line == "." {

			game := &Game{}
			game.Words = make(map[string]*Word)
			for _, word := range words {
				game.Words[word] = &Word{Word: word}
			}
			s := NewSimulator(*game)

			_, err := s.SimulateAllPossibleGames()
			assert.NoError(t, err)

			words = nil

			// skip the answer
			scanner.Scan()
			for scanner.Scan() {
				line = scanner.Text()
				fmt.Printf("Got line: %s\n", line)
				if line != "" {
					break
				}
			}

		}

		fmt.Printf("Adding word: %s\n", line)
		words = append(words, line)
	}
}