#include <stdarg.h>
#include <time.h>
#include "storage_number.h"

#ifndef NETDATA_WEB_BUFFER_H
#define NETDATA_WEB_BUFFER_H 1

#define WEB_DATA_LENGTH_INCREASE_STEP 16384

typedef struct web_buffer {
	size_t size;		// allocation size of buffer
	size_t len;		// current data length in buffer
	char *buffer;	// the buffer
	uint8_t contenttype;
	uint8_t options;
	time_t date;	// the date this content has been generated
} BUFFER;

// options
#define WB_CONTENT_CACHEABLE			1
#define WB_CONTENT_NO_CACHEABLE			2

// content-types
#define CT_APPLICATION_JSON				1
#define CT_TEXT_PLAIN					2
#define CT_TEXT_HTML					3
#define CT_APPLICATION_X_JAVASCRIPT		4
#define CT_TEXT_CSS						5
#define CT_TEXT_XML						6
#define CT_APPLICATION_XML				7
#define CT_TEXT_XSL						8
#define CT_APPLICATION_OCTET_STREAM		9
#define CT_APPLICATION_X_FONT_TRUETYPE	10
#define CT_APPLICATION_X_FONT_OPENTYPE	11
#define CT_APPLICATION_FONT_WOFF		12
#define CT_APPLICATION_FONT_WOFF2		13
#define CT_APPLICATION_VND_MS_FONTOBJ	14
#define CT_IMAGE_SVG_XML				15
#define CT_IMAGE_PNG					16
#define CT_IMAGE_JPG					17
#define CT_IMAGE_GIF					18
#define CT_IMAGE_XICON					19
#define CT_IMAGE_ICNS					20
#define CT_IMAGE_BMP					21

#define buffer_strlen(wb) ((wb)->len)
extern const char *buffer_tostring(BUFFER *wb);

#define buffer_need_bytes(buffer, needed_free_size) do { if(unlikely((buffer)->size - (buffer)->len < (size_t)(needed_free_size))) buffer_increase((buffer), (size_t)(needed_free_size)); } while(0)

#define buffer_flush(wb) wb->buffer[wb->len = 0] = '\0'
extern void buffer_reset(BUFFER *wb);

extern void buffer_strcat(BUFFER *wb, const char *txt);
extern void buffer_rrd_value(BUFFER *wb, calculated_number value);

extern void buffer_date(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds);
extern void buffer_jsdate(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds);

extern BUFFER *buffer_create(long size);
extern void buffer_free(BUFFER *b);
extern void buffer_increase(BUFFER *b, size_t free_size_required);

extern void buffer_snprintf(BUFFER *wb, size_t len, const char *fmt, ...);
extern void buffer_vsprintf(BUFFER *wb, const char *fmt, va_list args);
extern void buffer_sprintf(BUFFER *wb, const char *fmt, ...);

extern void buffer_char_replace(BUFFER *wb, char from, char to);

#endif /* NETDATA_WEB_BUFFER_H */