#include <stdlib.h>
#include <stdio.h>
#include <SDL/SDL.h>
#include "structures.h"
#include "constantes.h"
#include "prototypes.h"

static inline void highlight_current_character(struct team_t *team, int character_idx)
{
    struct character_t *chr = &team->chrs[character_idx];

    chr->surf = chr->red_surf;
}

static inline void unhighlight_prev_character(struct team_t *team, int character_idx)
{
    struct character_t *chr = &team->chrs[character_idx];

    chr->surf = chr->def_surf;
}

static void generate_enemy_types(struct team_t *ally_team, ENNEMIS ennemis[], int Vnbennemis)
{
    int avg = 0;

    for (int i = 0; i < ally_team->chr_cnt; i++) {
        avg += ally_team->chrs[i].ally.nv;
    }

    avg /= ally_team->chr_cnt;

    if (avg < 5)
    {
        /* easy */
        for (int i=0; i <= Vnbennemis; i++) {
            ennemis[i].classe=GUERRIER_GOBELIN;
        }
    } else {
        /* XXX should not happen for now since we do not change the levels */
        abort();
    }
}

static int find_next_ally(const struct team_t *ally, int current)
{
    for (int i = current + 1; i < ally->chr_cnt; ++i) {
        const struct character_t *chr = &ally->chrs[i];

        if (chr->alive)
            return i;
    }

    for (int i = 0; i <= current; ++i) {
        const struct character_t *chr = &ally->chrs[i];

        if (chr->alive)
            return i;
    }

    return -1;
}

/* function called after an action has been performed */
static void update_current_character(struct team_t *ally, int *ally_idx, bool *ally_turn)
{
    if (*ally_turn) {
        int next;

        unhighlight_prev_character(ally, *ally_idx);

        next = find_next_ally(ally, *ally_idx);

        /* if there is no next ally or they are dead */
        if (next <= *ally_idx) {
            inverse_boolean(*ally_turn);
        }

        *ally_idx = next;

        if (*ally_turn) {
            highlight_current_character(ally, *ally_idx);
        }
    }
}

int Fjouer (SURFACES *surfaces, POSITIONS *positions, struct team_t *ally,ENNEMIS ennemis[])
{
    unsigned int continuer=1;
    int selection=0;
    int i;
    SDL_Event event;
    int Vtourallie=0;
    int Vtourennemi=0;
    int Vtour;
    int Vnbennemis=0;
    int page=0;
    int nbactions=5;

    unsigned int gagne,perdu;
    if(surfaces->Pfondjeu!=NULL)
    {
        SDL_FreeSurface(surfaces->Pfondjeu);
        surfaces->Pfondjeu=NULL;
    }
    Fblitterfond(surfaces); // on blit le fond du jeu
    Fremplirobjets(&ally->objects); // on monte les variables potions ether, etc
    Vnbennemis=Fcalculernbennemis(); // on tire aléatoirement le nombre d'ennemis présents dans le combat
    generate_enemy_types(ally, ennemis,Vnbennemis); // on choisit la classe des ennemis comme guerrier gobelin etc
    Fremplirennemis(surfaces,Vnbennemis,ennemis);

    /* compute whether the allies or the enemies should begin */
    Vtour = rand() % 2;

    if (Vtour == ALLIE) {
        /* the current character will be highlighted in red */
        /* TODO should be generic for an enemy or an ally */
        highlight_current_character(ally, Vtourallie);
    }


    Fblitterennemis(surfaces,positions,ennemis,Vnbennemis); // idem pour les ennemis
    blit_team(surfaces, ally);

    while (continuer)
    {
        if(Vtour==ALLIE) //si un player joue
        {
            while (!ally->chrs[Vtourallie].alive) //si le perso selectionné est mort
            {
                if(Vtourallie<2) // si ce n'est pas le dernier
                    Vtourallie++; // on prend le perso suivant
                else // sinon si c'est le dernier
                    Vtourallie=0; // on reprend le 1er
            }
            Fchangeractionselectionnee(surfaces,positions,selection,page,nbactions,ACTIONS,NULL);
            SDL_WaitEvent(&event);
            switch(event.type)
            {
                case SDL_KEYDOWN:
                switch(event.key.keysym.unicode)
                {
                    case SDLK_ESCAPE:
                    case SDLK_a:
                    continuer=0;
                    break;
                }
                switch (event.key.keysym.sym)
                {
                    case SDLK_UP:
                    case SDLK_k:
                    if (selection!=0)
                        selection--;
                    else
                        selection=nbactions-1;
                    page=selection/3;
                    Fchangeractionselectionnee(surfaces,positions,selection,page,nbactions,ACTIONS,NULL);
                    break;
                    case SDLK_DOWN:
                    case SDLK_j:
                    if (selection!=nbactions-1)
                        selection++;
                    else
                        selection=0;
                    page=selection/3;
                    Fchangeractionselectionnee(surfaces,positions,selection,page,nbactions,ACTIONS,NULL);
                    break;
                    case SDLK_RETURN:
                    case SDLK_f:
                    {
                        enum action_state_t (*actionp)(SURFACES *, POSITIONS *, struct team_t *ally, int, ENNEMIS[], int) = NULL;

                        switch (selection) {
                            case ATTAQUE: actionp = Fattaquer; break;
                            case MAGIE_BLANCHE: actionp = Fselectionnermagieblanche; break;
                            case MAGIE_NOIRE: actionp = Fselectionnermagienoire; break;
                            case TECHNIQUES: break;
                            case OBJETS: actionp = Fselectionnerobjet; break;
                            default: abort(); break;
                        }

                        if (actionp && (*actionp)(surfaces,positions, ally, Vtourallie,ennemis,Vnbennemis) == ACTION_PERFORMED) {
                            update_current_character(ally, &Vtourallie, (bool *)&Vtour);
                            blit_team(surfaces, ally);
                        }
                    }
                    break;
                    default:
                    break;
                }
                break;
            }
        }
        else if(Vtour==ENNEMI) // sinon si c'est le cpu qui joue
        {
            while (ennemis[Vtourennemi].etat == MORT) {
                if (Vtourennemi < Vnbennemis) {
                    Vtourennemi++;
                } else if (Vtourennemi == Vnbennemis) {
                    Vtourennemi = 0;
                }
            }
/* TODO reactivate */
#if 0
            Factionennemi(&Vtourennemi,surfaces,positions,ennemis,persos,Vnbennemis,&Vtour,Vtourallie);
#endif
        } // les actions sont faites


        // on vérifie à présent si on a gagné ou si on a perdu !
        gagne=1;
        perdu=1;
        for(i=0;i<=Vnbennemis;i++)
        {
            if(ennemis[i].etat==VIE)
                gagne=0;
        }
        for (i = 0; i < ally->chr_cnt; i++) {
            if (ally->chrs[i].alive)
                perdu=0;
        }

        // la y'a des trucs a mettre pour si on gagne ou on perd parce que sa fait assez pitié :p
        if(perdu)
        {
            SDL_Delay(2000);
            continuer=0;
        }
        else if(gagne)
        {
            SDL_Delay(2000);
            continuer=0;
        }
    }
    return 0;
}

void Finitialiserpositionsennemis(SURFACES *surfaces,POSITIONS *positions,int Vnbennemis)
{
    if (Vnbennemis==0)
    {
        positions->Vpositionennemis[0].x=XWIN-20-surfaces->Tennemi[0]->w;
        positions->Vpositionennemis[0].y=YWIN/2-surfaces->Tennemi[0]->h/2;
    }
    if (Vnbennemis==1)
    {
        positions->Vpositionennemis[0].x = XWIN - 20 - surfaces->Tennemi[0]->w;
        positions->Vpositionennemis[0].y = YWIN/3 - surfaces->Tennemi[0]->h/2;
        positions->Vpositionennemis[1].x = XWIN - 20 - surfaces->Tennemi[2]->w;
        positions->Vpositionennemis[1].y = YWIN/3*2 - surfaces->Tennemi[1]->h/2;
    }
    else if (Vnbennemis==2)
    {
        positions->Vpositionennemis[1].x = XWIN - 20 - surfaces->Tennemi[1]->w;
        positions->Vpositionennemis[1].y = YWIN/2 - surfaces->Tennemi[1]->h/2;
        positions->Vpositionennemis[0].x = XWIN - 20 - surfaces->Tennemi[0]->w;
        positions->Vpositionennemis[0].y = YWIN/4 - surfaces->Tennemi[1]->h/2;
        positions->Vpositionennemis[2].x = XWIN - 20 - surfaces->Tennemi[2]->w;
        positions->Vpositionennemis[2].y = YWIN/4*3 - surfaces->Tennemi[2]->h/2;
    }
    else if (Vnbennemis==3)
    {
        positions->Vpositionennemis[1].x = XWIN - 20 - surfaces->Tennemi[1]->w;
        positions->Vpositionennemis[1].y = YWIN/5*2 - surfaces->Tennemi[1]->h/2;
        positions->Vpositionennemis[2].x = XWIN - 20 - surfaces->Tennemi[2]->w;
        positions->Vpositionennemis[2].y = YWIN/5*3 - surfaces->Tennemi[2]->h/2;
        positions->Vpositionennemis[0].x = XWIN - surfaces->Tennemi[1]->w - surfaces->Tennemi[0]->w/2;
        positions->Vpositionennemis[0].y = YWIN/5 -surfaces->Tennemi[0]->h/2;
        positions->Vpositionennemis[3].x = XWIN - surfaces->Tennemi[2]->w - surfaces->Tennemi[3]->w/2;
        positions->Vpositionennemis[3].y = YWIN/5*4 - surfaces->Tennemi[3]->h/2;
    }
    else if (Vnbennemis==4)
    {
        positions->Vpositionennemis[2].x = XWIN - 20 - surfaces->Tennemi[2]->w;
        positions->Vpositionennemis[2].y = YWIN/2 - surfaces->Tennemi[2]->h/2;
        positions->Vpositionennemis[1].x = XWIN - surfaces->Tennemi[2]->w - surfaces->Tennemi[1]->w/2;
        positions->Vpositionennemis[1].y = YWIN/6*2 - surfaces->Tennemi[1]->h/2;
        positions->Vpositionennemis[3].x = XWIN - surfaces->Tennemi[2]->w - surfaces->Tennemi[3]->w/2;
        positions->Vpositionennemis[3].y = YWIN/6*4 - surfaces->Tennemi[3]->h/2;
        positions->Vpositionennemis[0].x = XWIN - surfaces->Tennemi[2]->w - surfaces->Tennemi[1]->w - surfaces->Tennemi[0]->w/2;
        positions->Vpositionennemis[0].y = YWIN/6 - surfaces->Tennemi[0]->h/2;
        positions->Vpositionennemis[4].x = XWIN - surfaces->Tennemi[2]->w - surfaces->Tennemi[3]->w - surfaces->Tennemi[4]->w/2;
        positions->Vpositionennemis[4].y = YWIN/6*5 - surfaces->Tennemi[4]->h/2;
    }
}

void Fremplirobjets(OBJET *objets)
{
    objets->potions=10;
    objets->ethers=10;
    objets->potionsplus=5;
    objets->ethersplus=5;
}