#include "httpd.h"
#include "http_config.h"
#include "http_protocol.h"
#include "http_log.h"
#include "ap_config.h"
#include "apr_hash.h"
#include "ClearSilver.h"

module AP_MODULE_DECLARE_DATA cs_module;

typedef struct {
    apr_hash_t *vars;
    char *hdf;
} cs_dir_config;

static void *cs_create_config(apr_pool_t *p, char *path)
{
    cs_dir_config *c = apr_pcalloc(p, sizeof(cs_dir_config));
    c->vars = apr_hash_make(p);
    c->hdf = NULL;
    return (void *)c;
}

static NEOERR *render_cb(void *data, char *s) {
    request_rec *r = (request_rec *)data;
    ap_rputs(s, r);
    return STATUS_OK;
}

static int process_cs(request_rec *r) {
    HDF *hdf;
    CSPARSE *cs;
    apr_pool_t *p;
    apr_hash_index_t *hi;
    cs_dir_config *c = ap_get_module_config(r->per_dir_config, &cs_module);
    hdf_init(&hdf);
    if(c->hdf != NULL)
      hdf_read_file(hdf, c->hdf);
    for (hi = apr_hash_first(NULL, c->vars); hi; hi = apr_hash_next(hi)) {
        const char *k;
        const char *v;
        apr_hash_this(hi, (const void**)&k, NULL, (void**)&v);
        hdf_set_value(hdf, (char *)k, (char *)v);
    }
    cs_init(&cs, hdf);
    cs_parse_file(cs, r->filename);
    cs_render(cs, r, render_cb);
    cs_destroy(&cs);
    hdf_destroy(&hdf);
    return OK;
}

/* The sample content handler */
static int cs_handler(request_rec *r)
{
    if (strcmp(r->handler, "cs-handler")) {
        return DECLINED;
    }
    r->content_type = "text/html";      
    process_cs(r);
    return OK;
}

static const char *cmd_set_hdf_file(cmd_parms *cmd, void *conf, const char *v1) {
    cs_dir_config *c = (cs_dir_config *)conf;
    c->hdf = ap_server_root_relative(cmd->pool, v1);
    return NULL;
}

static const char *cmd_set_hdf_value(cmd_parms *cmd, void *conf, const char *v1, const char *v2) {
    cs_dir_config *c = (cs_dir_config *)conf;
    apr_hash_set(c->vars, v1, APR_HASH_KEY_STRING, v2);
    return NULL;
}

static const command_rec command_table[] = {
    AP_INIT_TAKE2("HDFValue", cmd_set_hdf_value, NULL, 
                  ACCESS_CONF, "set HDF value"),
    AP_INIT_TAKE1("HDFFile", cmd_set_hdf_file, NULL, 
                  ACCESS_CONF, "set HDF filename"),
    { NULL }
};

static void cs_register_hooks(apr_pool_t *p)
{
    ap_hook_handler(cs_handler, NULL, NULL, APR_HOOK_MIDDLE);
}

/* Dispatch list for API hooks */
module AP_MODULE_DECLARE_DATA cs_module = {
    STANDARD20_MODULE_STUFF, 
    cs_create_config,      /* create per-dir    config structures */
    NULL,                  /* merge  per-dir    config structures */
    NULL,                  /* create per-server config structures */
    NULL,                  /* merge  per-server config structures */
    command_table,         /* table of config file commands       */
    cs_register_hooks      /* register hooks                      */
};