#include "game.h"
#include <time.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>


#define MAX_RAND_TRIES_PER_WORD 10
#define EMPTY_CHAR 0

//TODO: Spiellogik implementieren:
/* * Wörter aus der Wortliste zufällig horizontal oder vertikal platzieren
   * restliche Felder mit zufälligen Buchstaben füllen */

//Enum for direction
typedef enum {
   HORIZONTAL,
   VERTICAL
} Direction;

//this function clears gameboard
static void initializeSalad(char salad[MAX_SEARCH_FIELD_LEN][MAX_SEARCH_FIELD_LEN], unsigned int searchFieldLen){
   for (int i = 0; i < searchFieldLen; i++){
      for (int j = 0; j < searchFieldLen; j++){
         salad[i][j] = EMPTY_CHAR;
      }
   }
}

// this function checks if the word is placable at the current coordinates
static int isPlacementPossible(char salad[MAX_SEARCH_FIELD_LEN][MAX_SEARCH_FIELD_LEN], const char* word, int row, int col, Direction dir){
   int len = strlen(word);
   for (int k = 0; k < len; k++){
      if (dir == HORIZONTAL){
         if (salad[row][col + k] != EMPTY_CHAR) return 0;
      } else { //Vertikal
         if (salad[row + k][col] != EMPTY_CHAR) return 0;
      }
   }
   return 1;
}

//this function places the word at the current coordinate
static void placeWord (char salad[MAX_SEARCH_FIELD_LEN][MAX_SEARCH_FIELD_LEN], const char* word, int row, int col, Direction dir){
   int len = strlen(word);
   for (int k = 0; k < len; k++){
      if (dir == HORIZONTAL){
         salad[row][col + k] = word[k];
      } else {
         salad[row + k][col] = word[k];
      }
   }
}

// this function fills the empty cells with random characters
static void fillEmtpyCellsRandom(char salad[MAX_SEARCH_FIELD_LEN][MAX_SEARCH_FIELD_LEN], unsigned int searchFieldLen){
   for (int i = 0; i < searchFieldLen; i++){
      for (int j = 0; j < searchFieldLen; j++){
         if (salad[i][j] == EMPTY_CHAR){
            salad[i][j] = rand() % ('Z' - 'A' + 1) + 'A';
         }
      }
   }
}


// Creates the word salad by placing words randomly and filling empty spaces
int createWordSalad(char salad[MAX_SEARCH_FIELD_LEN][MAX_SEARCH_FIELD_LEN], unsigned int searchFieldLen, const char words[][MAX_WORD_LEN], unsigned int wordCount){
   srand(time(NULL));
   int placedWords = 0;

   initializeSalad(salad, searchFieldLen);

   for (int i = 0; i < wordCount; i++){
      const char* currentWord = words[i];
      int len = strlen(currentWord);
      int tries = 0;
      int success = 0;

      while (tries < MAX_RAND_TRIES_PER_WORD && !success){
         Direction dir = rand() % 2;
         int row, col;

         if (dir == HORIZONTAL){
            row = rand() % searchFieldLen;
            col = rand() % (searchFieldLen - len + 1);
         } else { //Vertikal
            row = rand() % (searchFieldLen - len + 1);
            col = rand() % searchFieldLen;
         }
         if (isPlacementPossible(salad, currentWord, row, col, dir)){
            placeWord(salad, currentWord, row, col, dir);
            success = 1;
            placedWords++;
         }
         tries++;
      }
   }
   fillEmtpyCellsRandom(salad, searchFieldLen);

   return placedWords;
}

// Prints the word salad to console
void showWordSalad(const char salad[MAX_SEARCH_FIELD_LEN][MAX_SEARCH_FIELD_LEN], unsigned int searchFieldLen)
{
   for (unsigned int i = 0; i < searchFieldLen; i++) {
      for (unsigned int j = 0; j < searchFieldLen; j++) {
         printf("%c ", salad[i][j]);
      }
      printf("\n");
   }
}


/*int main(void)
{
   // Spielfeldgröße
   unsigned int searchFieldLen = 15;

   // Beispiel-Wortliste
   const char words[][MAX_WORD_LEN] = {
      "AUTO",
      "BAUM",
      "HAUS",
      "KATZE",
      "SONNE"
  };
   unsigned int wordCount = sizeof(words) / sizeof(words[0]);

   // Spielfeld-Array
   char salad[MAX_SEARCH_FIELD_LEN][MAX_SEARCH_FIELD_LEN];

   // Zufall initialisieren (einmalig!)
   srand((unsigned int)time(NULL));

   // Wortsalat erzeugen
   int placed = createWordSalad(salad, searchFieldLen, words, wordCount);

   printf("Platziert: %d von %u Woertern\n\n", placed, wordCount);

   // Wortsalat ausgeben
   showWordSalad(salad, searchFieldLen);

   return 0;
}*/