#include "save.h"

#include <debug.h>
#include <fileioc.h>

#include "logic.h"
#include "util.h"

#define SAVEFILE "CHICKS"

const uint8_t VERSION = 0;

void gen_save_data(struct save_contents *save, const struct game_state *state) {
    save->lamp_on = state->lamp_on;
    save->last_time = state->time;
    save->start_time = state->start_time;
    save->lamp_switch_time = state->lamp_switch_time;
}

void load_save_data(const struct save_contents *save, struct game_state *state) {
    state->num_days = (save->last_time - save->start_time) / ONE_DAY;
    state->lamp_on = save->lamp_on;
    state->time = save->last_time;
    state->start_time = save->start_time;
    state->lamp_switch_time = save->lamp_switch_time;
    for(uint8_t i = 0; i < NUM_CHICKS; i++) {
        init_chick(&state->chicks[i]);
    }
}

bool save(const struct save_contents *save) {
    ti_var_t f = ti_Open(SAVEFILE, "w");
    if(!f) {
        dbg_printf("Failed to open save file for writing\n");
        return false;
    }
    ti_Write(&VERSION, sizeof VERSION, 1, f);
    ti_Write(save, sizeof *save, 1, f);
    ti_Close(f);

    // todo: security stuff
    return true;
}

bool load_save(struct save_contents *save) {
    ti_var_t f = ti_Open(SAVEFILE, "r");
    if(!f) {
        dbg_printf("Failed to open save file for reading\n");
        goto error;
    }
    uint8_t version;
    ti_Read(&version, sizeof version, 1, f);
    if(version != VERSION) {
        dbg_printf("Version mismatch: file has %u instead of %u\n", version, VERSION);
        goto error;
    }
    uint24_t size = ti_Read(save, sizeof *save, 1, f);
    ti_Close(f);
    ti_Delete(SAVEFILE);
    if(!size) {
        dbg_printf("Failed to read from save file\n");
        goto error;
    }
    // todo: security stuff
    return true;
error:
    get_default_save(save);
    return true;
}

void get_default_save(struct save_contents *save) {
    dbg_printf("Generating new default savefile\n");
    save->start_time = time(NULL);
    save->last_time = save->start_time;
    save->lamp_switch_time = save->start_time;
    save->lamp_on = lamp_should_be_on(save->last_time);
}