#include "config.h"
#include "ch32v30x_flash.h"
#include "util/hexdump.h"
#include "util/log.h"

PersistentData_t persistent;
#define TAG "Config"

NodeEntry * getNextNode() {
    uint32_t oldest_timestamp = UINT32_MAX;
    NodeEntry *selectedNode = &(persistent.contacts[0]);
    for (int i = 0; i < CONTACT_COUNT; i++) {
        NodeEntry *curNode = &(persistent.contacts[i]);
        if (curNode->last_seen_lt == 0) {
            break;
        }
        if (curNode->last_seen_lt < oldest_timestamp) {
            oldest_timestamp = curNode->last_seen_lt;
            selectedNode = curNode;
        }
    }
    return selectedNode;
}

NodeEntry * getNode(uint8_t hash) {
    NodeEntry *selectedNode = NULL;
    for (int i = 0; i < CONTACT_COUNT; i++) {
        NodeEntry *curNode = &(persistent.contacts[i]);
        if (curNode->pubKey[0] == hash) {
            selectedNode = curNode;
            break;
        }
    }
    return selectedNode;
}

void printNodeDB() {
    printf("Node database:\n");
    for (int i = 0; i < CONTACT_COUNT; i++) {
        const NodeEntry *node = &(persistent.contacts[i]);
        if (node->last_seen_lt == 0) continue; // skip inactive nodes

        printf("Node %d:\n", i);
        printf("  Name: %s\n", node->name);
        hexdump("Pubkey", node->pubKey, sizeof(node->pubKey));
        hexdump("Secret", node->secret, sizeof(node->secret));
        printf("\n");

        printf("  GPS: lat=%d, lon=%d\n", node->gps_latitude, node->gps_longitude);
        printf("  Path: ... (not expanded, add if needed)\n");
        printf("  Flags: 0x%02X\n", node->flags);
        printf("  Type: 0x%02X\n", node->type);
        printf("  Authenticated: %s\n", node->authenticated ? "Yes" : "No");
        printf("  Last Seen (remote ts): %d\n", node->last_seen_rt);
        printf("  Last Seen (local ts): %d\n", node->last_seen_lt);
        printf("  Sync timestamp: %d\n", node->sync_timestamp);
        printf("--------------------------------------\n");
    }
}

void loadConfig() {
    memcpy (&persistent, FLASH_USER_PAGE_ADDR, sizeof (persistent));
    uint32_t crcSum = *((uint32_t *)(((uint8_t *)&persistent) + (sizeof (persistent) - 2)));
    memset ((((uint8_t *)&persistent) + (sizeof (persistent) - sizeof(crcSum))), 0, 4);
    CRC_ResetDR();
    uint32_t currentSum = CRC_CalcBlockCRC ((uint32_t *)&persistent, sizeof (persistent) - 2);

    if (currentSum != crcSum) {
        memset (&persistent, 0, sizeof (persistent));
    }
}

void saveConfig() {
    CRC_ResetDR();
    uint32_t currentSum = CRC_CalcBlockCRC ((uint32_t *)&persistent, sizeof (persistent) - 2);
    memcpy ((((uint8_t *)&persistent) + (sizeof (persistent) - sizeof(currentSum))), (uint8_t *)currentSum, 4);
    FLASH_Unlock();
    FLASH_ErasePage_Fast (1919);
    FLASH_ProgramPage_Fast (1919, (uint32_t *)&persistent);
    FLASH_Lock();
}