#pragma once

#include "gmutil.h"

#include <the_Foundation/array.h>
#include <the_Foundation/object.h>
#include <the_Foundation/rect.h>
#include <the_Foundation/string.h>
#include <the_Foundation/time.h>
#include <SDL_render.h>

iDeclareType(GmImageInfo)
iDeclareType(GmHeading)
iDeclareType(GmRun)

typedef uint16_t iGmLinkId;

enum iGmLinkFlags {
    gemini_GmLinkFlag             = iBit(1),
    gopher_GmLinkFlag             = iBit(2),
    http_GmLinkFlag               = iBit(3),
    file_GmLinkFlag               = iBit(4),
    data_GmLinkFlag               = iBit(5),
    supportedProtocol_GmLinkFlag  = 0x1f,
    remote_GmLinkFlag             = iBit(9),
    userFriendly_GmLinkFlag       = iBit(10),
    imageFileExtension_GmLinkFlag = iBit(11),
    audioFileExtension_GmLinkFlag = iBit(12),
    content_GmLinkFlag            = iBit(13), /* content visible below */
    visited_GmLinkFlag            = iBit(14), /* in the history */
};

struct Impl_GmImageInfo {
    iInt2 size;
    size_t numBytes;
    const char *mime;
};

struct Impl_GmHeading {
    iRangecc text;
    int level; /* 0, 1, 2 */
};

enum iGmRunFlags {
    decoration_GmRunFlag  = iBit(1), /* not part of the source */
    startOfLine_GmRunFlag = iBit(2),
    endOfLine_GmRunFlag   = iBit(3),
    siteBanner_GmRunFlag  = iBit(4), /* area reserved for the site banner */
};

struct Impl_GmRun {
    iRangecc  text;
    uint8_t   font;
    uint8_t   color;
    uint8_t   flags;
    iRect     bounds;    /* used for hit testing, may extend to edges */
    iRect     visBounds; /* actual visual bounds */
    iGmLinkId linkId;    /* zero for non-links */
    uint16_t  imageId;   /* zero for images */
};

const char *    findLoc_GmRun   (const iGmRun *, iInt2 pos);

iDeclareClass(GmDocument)
iDeclareObjectConstruction(GmDocument)

enum iGmDocumentFormat {
    undefined_GmDocumentFormat = -1,
    gemini_GmDocumentFormat  = 0,
    plainText_GmDocumentFormat,
};

void    setThemeSeed_GmDocument (iGmDocument *, const iBlock *seed);
void    setFormat_GmDocument    (iGmDocument *, enum iGmDocumentFormat format);
void    setWidth_GmDocument     (iGmDocument *, int width);
void    setUrl_GmDocument       (iGmDocument *, const iString *url);
void    setSource_GmDocument    (iGmDocument *, const iString *source, int width);
void    setImage_GmDocument     (iGmDocument *, iGmLinkId linkId, const iString *mime, const iBlock *data);

void    reset_GmDocument        (iGmDocument *); /* free images */

typedef void (*iGmDocumentRenderFunc)(void *, const iGmRun *);

void            render_GmDocument           (const iGmDocument *, iRangei visRangeY,
                                             iGmDocumentRenderFunc render, void *);
iInt2           size_GmDocument             (const iGmDocument *);
iBool           hasSiteBanner_GmDocument    (const iGmDocument *);
const iArray *  headings_GmDocument         (const iGmDocument *);

iRangecc        findText_GmDocument         (const iGmDocument *, const iString *text, const char *start);
iRangecc        findTextBefore_GmDocument   (const iGmDocument *, const iString *text, const char *before);

enum iGmLinkPart {
    icon_GmLinkPart,
    text_GmLinkPart,
    textHover_GmLinkPart,
    domain_GmLinkPart,
    visited_GmLinkPart,
};

const iGmRun *  findRun_GmDocument      (const iGmDocument *, iInt2 pos);
const char *    findLoc_GmDocument      (const iGmDocument *, iInt2 pos);
const iGmRun *  findRunAtLoc_GmDocument (const iGmDocument *, const char *loc);
const iString * linkUrl_GmDocument      (const iGmDocument *, iGmLinkId linkId);
uint16_t        linkImage_GmDocument    (const iGmDocument *, iGmLinkId linkId);
int             linkFlags_GmDocument    (const iGmDocument *, iGmLinkId linkId);
enum iColorId   linkColor_GmDocument    (const iGmDocument *, iGmLinkId linkId, enum iGmLinkPart part);
const iTime *   linkTime_GmDocument     (const iGmDocument *, iGmLinkId linkId);
iBool           isMediaLink_GmDocument  (const iGmDocument *, iGmLinkId linkId);
const iString * title_GmDocument        (const iGmDocument *);
iChar           siteIcon_GmDocument     (const iGmDocument *);

SDL_Texture *   imageTexture_GmDocument (const iGmDocument *, uint16_t imageId);
void            imageInfo_GmDocument    (const iGmDocument *, uint16_t imageId, iGmImageInfo *info_out);