/*
 * Copyright (C) Kirill A. Korinskiy
 */


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_dc.h>


static char *ngx_dc_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);


ngx_uint_t  ngx_dc_max_module;


static ngx_command_t  ngx_dc_commands[] = {

    { ngx_string("dc"),
      NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE1,
      ngx_dc_block,
      0,
      0,
      NULL },

      ngx_null_command
};


static ngx_core_module_t  ngx_dc_module_ctx = {
    ngx_string("dc"),
    NULL,
    NULL
};


ngx_module_t  ngx_dc_module = {
    NGX_MODULE_V1,
    &ngx_dc_module_ctx,		/* module context */
    ngx_dc_commands,		/* module directives */
    NGX_CORE_MODULE,		/* module type */
    NULL,			/* init master */
    NULL,			/* init module */
    NULL,			/* init process */
    NULL,			/* init thread */
    NULL,			/* exit thread */
    NULL,			/* exit process */
    NULL,			/* exit master */
    NGX_MODULE_V1_PADDING
};

static void *ngx_dc_core_create_conf(ngx_conf_t *cf);

static ngx_command_t  ngx_dc_core_commands[] = {

    { ngx_string("uri"),
      NGX_DC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_str_slot,
      NGX_DC_CONF_OFFSET,
      offsetof(ngx_dc_core_conf_t, uri),
      NULL },

      ngx_null_command
};

ngx_dc_module_t ngx_dc_core_module_ctx = {
    ngx_dc_core_create_conf,	/* create configuration */
    NULL			/* init configuration */
};

ngx_module_t  ngx_dc_core_module = {
    NGX_MODULE_V1,
    &ngx_dc_core_module_ctx,	/* module context */
    ngx_dc_core_commands,	/* module directives */
    NGX_DC_MODULE,		/* module type */
    NULL,			/* init master */
    NULL,			/* init module */
    NULL,			/* init process */
    NULL,			/* init thread */
    NULL,			/* exit thread */
    NULL,			/* exit process */
    NULL,			/* exit master */
    NGX_MODULE_V1_PADDING
};

static char *ngx_dc_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
    char               *rv;
    ngx_str_t          *value;
    ngx_uint_t          i;
    ngx_uint_t          mi;
    ngx_conf_t          pcf;
    ngx_dc_module_t    *m;
    ngx_dc_conf_ctx_t  *ctx;

    /* the dc context */

    ctx = ngx_pcalloc(cf->pool, sizeof(ngx_dc_conf_ctx_t));
    if (ctx == NULL) {
	return NGX_CONF_ERROR;
    }
    
    *(ngx_dc_conf_ctx_t **) conf = ctx;

    ngx_dc_max_module = 0;
    for (i = 0; ngx_modules[i]; i++) {
        if (ngx_modules[i]->type != NGX_DC_MODULE) {
            continue;
        }

        ngx_modules[i]->ctx_index = ngx_dc_max_module++;
    }

    value = cf->args->elts;

    ctx->name = value[1];

    /* the dc conf context, it is the same in the all dc contexts */

    ctx->conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_dc_max_module);
    if (ctx->conf == NULL) {
	return NGX_CONF_ERROR;
    }

    for (i = 0; ngx_modules[i]; i++) {
        if (ngx_modules[i]->type != NGX_DC_MODULE) {
            continue;
        }

	m = ngx_modules[i]->ctx;
        mi = ngx_modules[i]->ctx_index;

	if (m->create_conf) {
	    ctx->conf[mi] = m->create_conf(cf);
	    if (ctx->conf[mi] == NULL) {
		return NGX_CONF_ERROR;
	    }
	}
    }

    pcf = *cf;
    cf->ctx = ctx;

    cf->module_type = NGX_DC_MODULE;
    cf->cmd_type = NGX_DC_CONF;

    rv = ngx_conf_parse(cf, NULL);

    *cf = pcf;

    if (rv != NGX_CONF_OK) {
        *cf = pcf;
        return rv;
    }

    for (i = 0; ngx_modules[i]; i++) {
        if (ngx_modules[i]->type != NGX_DC_MODULE) {
            continue;
        }

	m = ngx_modules[i]->ctx;
        mi = ngx_modules[i]->ctx_index;

	if (m->init_conf) {
	    rv = m->init_conf(cf, ctx->conf[mi]);
	    if (rv != NGX_CONF_OK) {
		return rv;
	    }
	}
    }

    return NGX_CONF_OK;
}

static void *
ngx_dc_core_create_conf(ngx_conf_t *cf)
{
    ngx_dc_core_conf_t *conf;

    conf = ngx_pcalloc(cf->pool, sizeof(ngx_dc_core_conf_t));
    if (conf == NULL) {
	return NGX_CONF_ERROR;
    }

    return conf;
}

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