#include <errno.h>
#include <stdlib.h>
#include <string.h>

#include "toml.h"
#include "log_private.h"
#include "stellar_config.h"

#define CONFIG_LOG_ERROR(format, ...) STELLAR_LOG_ERROR(__thread_local_logger, "config", format, ##__VA_ARGS__)
#define CONFIG_LOG_DEBUG(format, ...) STELLAR_LOG_DEBUG(__thread_local_logger, "config", format, ##__VA_ARGS__)

// return  0: success
// retuun -1: failed
static int parse_snowflake_section(toml_table_t *root, struct snowflake_options *opts)
{
    const char *ptr;
    toml_table_t *table;

    table = toml_table_in(root, "snowflake");
    if (table == NULL)
    {
        CONFIG_LOG_ERROR("config file missing snowflake section");
        return -1;
    }

    ptr = toml_raw_in(table, "snowflake_base");
    if (ptr == NULL)
    {
        CONFIG_LOG_ERROR("config file missing snowflake->snowflake_base");
        return -1;
    }
    opts->snowflake_base = atoi(ptr);

    ptr = toml_raw_in(table, "snowflake_offset");
    if (ptr == NULL)
    {
        CONFIG_LOG_ERROR("config file missing snowflake->snowflake_offset");
        return -1;
    }
    opts->snowflake_offset = atoi(ptr);

    return 0;
}

// return  0: success
// retuun -1: failed
static int parse_packet_io_section(toml_table_t *root, struct packet_io_options *opts)
{
    int ret = -1;
    char *ptr_mode = NULL;
    char *ptr_dumpfile_path = NULL;
    char *ptr_app_symbol = NULL;
    char *ptr_dev_symbol = NULL;
    const char *ptr;
    toml_table_t *table;
    toml_array_t *mask_array;

    table = toml_table_in(root, "packet_io");
    if (table == NULL)
    {
        CONFIG_LOG_ERROR("config file missing packet_io section");
        goto error_out;
    }

    ptr = toml_raw_in(table, "mode");
    if (ptr == NULL || toml_rtos(ptr, &ptr_mode) != 0)
    {
        CONFIG_LOG_ERROR("config file missing packet_io->mode");
        goto error_out;
    }
    if (strcmp(ptr_mode, "dumpfile") == 0)
    {
        opts->mode = PACKET_IO_DUMPFILE;
    }
    else if (strcmp(ptr_mode, "dumpfilelist") == 0)
    {
        opts->mode = PACKET_IO_DUMPFILELIST;
    }
    else if (strcmp(ptr_mode, "marsio") == 0)
    {
        opts->mode = PACKET_IO_MARSIO;
    }
    else
    {
        CONFIG_LOG_ERROR("config file invalid packet_io->mode %s, only support dumpfile and marsio", ptr);
        goto error_out;
    }

    if (opts->mode == PACKET_IO_DUMPFILE || opts->mode == PACKET_IO_DUMPFILELIST)
    {
        ptr = toml_raw_in(table, "dumpfile_path");
        if (ptr == NULL || toml_rtos(ptr, &ptr_dumpfile_path) != 0)
        {
            CONFIG_LOG_ERROR("config file missing packet_io->dumpfile_path");
            goto error_out;
        }
        strcpy(opts->dumpfile_path, ptr_dumpfile_path);
    }
    else
    {
        ptr = toml_raw_in(table, "app_symbol");
        if (ptr == NULL || toml_rtos(ptr, &ptr_app_symbol) != 0)
        {
            CONFIG_LOG_ERROR("config file missing packet_io->app_symbol");
            goto error_out;
        }
        strcpy(opts->app_symbol, ptr_app_symbol);

        ptr = toml_raw_in(table, "dev_symbol");
        if (ptr == NULL || toml_rtos(ptr, &ptr_dev_symbol) != 0)
        {
            CONFIG_LOG_ERROR("config file missing packet_io->dev_symbol");
            goto error_out;
        }
        strcpy(opts->dev_symbol, ptr_dev_symbol);
    }

    ptr = toml_raw_in(table, "nr_worker_thread");
    if (ptr == NULL)
    {
        CONFIG_LOG_ERROR("config file missing packet_io->nr_worker_thread");
        goto error_out;
    }
    if (atoi(ptr) <= 0 || atoi(ptr) > MAX_THREAD_NUM)
    {
        CONFIG_LOG_ERROR("config file invalid packet_io->nr_worker_thread %d, range [1, %d]", atoi(ptr), MAX_THREAD_NUM);
        goto error_out;
    }
    opts->nr_worker_thread = atoi(ptr);

    mask_array = toml_array_in(table, "cpu_mask");
    if (mask_array == NULL)
    {
        CONFIG_LOG_ERROR("config file missing packet_io->cpu_mask");
        goto error_out;
    }
    for (uint16_t i = 0; i < opts->nr_worker_thread; i++)
    {
        ptr = toml_raw_at(mask_array, i);
        if (ptr == NULL)
        {
            CONFIG_LOG_ERROR("config file missing packet_io->cpu_mask[%d]", i);
            goto error_out;
        }
        opts->cpu_mask[i] = atoi(ptr);
    }

    ret = 0;

error_out:
    if (ptr_mode)
    {
        free(ptr_mode);
    }
    if (ptr_dumpfile_path)
    {
        free(ptr_dumpfile_path);
    }
    if (ptr_app_symbol)
    {
        free(ptr_app_symbol);
    }
    if (ptr_dev_symbol)
    {
        free(ptr_dev_symbol);
    }

    return ret;
}

// return  0: success
// retuun -1: failed
static int parse_schedule_options(toml_table_t *root, struct schedule_options *opts)
{
    const char *ptr;
    toml_table_t *table;

    table = toml_table_in(root, "schedule");
    if (table == NULL)
    {
        CONFIG_LOG_ERROR("config file missing schedule section");
        return -1;
    }

    ptr = toml_raw_in(table, "merge_stat_interval");
    if (ptr == NULL)
    {
        CONFIG_LOG_ERROR("config file missing schedule->merge_stat_interval");
        return -1;
    }
    opts->merge_stat_interval = atoll(ptr);
    if (opts->merge_stat_interval < 1 || opts->merge_stat_interval > 60000)
    {
        CONFIG_LOG_ERROR("config file invalid schedule->merge_stat_interval %ld, range [1, 60000]", opts->merge_stat_interval);
        return -1;
    }

    ptr = toml_raw_in(table, "output_stat_interval");
    if (ptr == NULL)
    {
        CONFIG_LOG_ERROR("config file missing schedule->output_stat_interval");
        return -1;
    }
    opts->output_stat_interval = atoll(ptr);
    if (opts->output_stat_interval < 1 || opts->output_stat_interval > 60000)
    {
        CONFIG_LOG_ERROR("config file invalid schedule->output_stat_interval %ld, range [1, 60000]", opts->output_stat_interval);
        return -1;
    }

    ptr = toml_raw_in(table, "packet_io_yield_interval");
    if (ptr == NULL)
    {
        CONFIG_LOG_ERROR("config file missing schedule->packet_io_yield_interval");
        return -1;
    }
    opts->packet_io_yield_interval = atoll(ptr);
    if (opts->packet_io_yield_interval < 1 || opts->packet_io_yield_interval > 60000)
    {
        CONFIG_LOG_ERROR("config file invalid schedule->packet_io_yield_interval %ld, range [1, 60000]", opts->packet_io_yield_interval);
        return -1;
    }

    return 0;
}

// return  0: success
// retuun -1: failed
int stellar_config_load(struct stellar_config *config, const char *file)
{
    int ret = -1;
    char errbuf[200];
    FILE *fp = NULL;
    toml_table_t *table = NULL;

    fp = fopen(file, "r");
    if (fp == NULL)
    {
        CONFIG_LOG_ERROR("open config file %s failed, %s", file, strerror(errno));
        goto error_out;
    }

    table = toml_parse_file(fp, errbuf, sizeof(errbuf));
    if (table == NULL)
    {
        CONFIG_LOG_ERROR("parse config file %s failed, %s", file, errbuf);
        goto error_out;
    }

    if (parse_snowflake_section(table, &config->snowflake_opts) != 0)
    {
        goto error_out;
    }

    if (parse_packet_io_section(table, &config->pkt_io_opts) != 0)
    {
        goto error_out;
    }

    if (parse_schedule_options(table, &config->sched_opts) != 0)
    {
        goto error_out;
    }

    ret = 0;

error_out:
    if (table)
    {
        toml_free(table);
    }

    if (fp)
    {
        fclose(fp);
    }

    return ret;
}

void stellar_config_print(const struct stellar_config *config)
{
    if (config == NULL)
    {
        return;
    }

    const struct packet_io_options *pkt_io_opts = &config->pkt_io_opts;
    const struct snowflake_options *snowflake_opts = &config->snowflake_opts;

    // snowflake config
    CONFIG_LOG_DEBUG("snowflake->snowflake_base                            : %d", snowflake_opts->snowflake_base);
    CONFIG_LOG_DEBUG("snowflake->snowflake_offset                          : %d", snowflake_opts->snowflake_offset);

    // packet io config
    CONFIG_LOG_DEBUG("packet_io->mode                                      : %s", pkt_io_opts->mode == PACKET_IO_DUMPFILE ? "dumpfile" : (pkt_io_opts->mode == PACKET_IO_DUMPFILELIST ? "dumpfilelist" : "marsio"));
    if (pkt_io_opts->mode == PACKET_IO_DUMPFILE || pkt_io_opts->mode == PACKET_IO_DUMPFILELIST)
    {
        CONFIG_LOG_DEBUG("packet_io->dumpfile_path                             : %s", pkt_io_opts->dumpfile_path);
    }
    else
    {
        CONFIG_LOG_DEBUG("packet_io->app_symbol                                : %s", pkt_io_opts->app_symbol);
        CONFIG_LOG_DEBUG("packet_io->dev_symbol                                : %s", pkt_io_opts->dev_symbol);
    }
    CONFIG_LOG_DEBUG("packet_io->nr_worker_thread                                : %d", pkt_io_opts->nr_worker_thread);
    for (uint16_t i = 0; i < pkt_io_opts->nr_worker_thread; i++)
    {
        CONFIG_LOG_DEBUG("packet_io->cpu_mask[%3d]                             : %d", i, pkt_io_opts->cpu_mask[i]);
    }

    // schedule config
    CONFIG_LOG_DEBUG("schedule->merge_stat_interval                        : %ld", config->sched_opts.merge_stat_interval);
    CONFIG_LOG_DEBUG("schedule->output_stat_interval                       : %ld", config->sched_opts.output_stat_interval);
    CONFIG_LOG_DEBUG("schedule->packet_io_yield_interval                   : %ld", config->sched_opts.packet_io_yield_interval);
}