#ifndef CC_LWEB_H
#define CC_LWEB_H
#include "Bitmap.h"
#include "Constants.h"
/* Implements asynchronous web tasks for the launcher.
	Copyright 2014-2023 ClassiCube | Licensed under BSD-3
*/

struct HttpRequest;
struct JsonContext;
typedef void (*JsonOnValue)(struct JsonContext* ctx, const cc_string* v);
typedef void (*JsonOnNew)(struct JsonContext* ctx);

/* State for parsing JSON text */
struct JsonContext {
	char* cur;        /* Pointer to current character in JSON stream being inspected. */
	int left;         /* Number of characters left to be inspected. */
	cc_bool failed;   /* Whether there was an error parsing the JSON. */
	cc_string curKey; /* Key/Name of current member */
	int depth;        /* Object/Array depth (e.g. { { { is depth 3 */
	
	JsonOnNew OnNewArray;  /* Invoked when start of an array is read. */
	JsonOnNew OnNewObject; /* Invoked when start of an object is read. */
	JsonOnValue OnValue;   /* Invoked on each member value in an object/array. */
	cc_string _tmp; /* temp value used for reading string values */
	char _tmpBuffer[STRING_SIZE];
};
/* Initialises state of JSON parser. */
void Json_Init(struct JsonContext* ctx, STRING_REF char* str, int len);
/* Parses the JSON text, invoking callbacks when value/array/objects are read. */
/* NOTE: DO NOT persist the value argument in OnValue. */
cc_bool Json_Parse(struct JsonContext* ctx);

/* Represents all known details about a server. */
struct ServerInfo {
	cc_string hash, name, ip, mppass, software;
	int players, maxPlayers, port, uptime;
	cc_bool featured;
	char country[2];
	int _order; /* (internal) order in servers table after filtering */
	char _hashBuffer[32],   _nameBuffer[STRING_SIZE];
	char _ipBuffer[16],     _mppassBuffer[STRING_SIZE];
	char _softBuffer[STRING_SIZE];
};

/* Represents a country flag */
struct Flag {
	struct Bitmap bmp;
	char country[2]; /* ISO 3166-1 alpha-2 */
	void* meta; /* Backend specific meta */
};

struct LWebTask {
	cc_bool completed; /* Whether the task has finished executing. */
	cc_bool working;   /* Whether the task is currently in progress, or is scheduled to be. */
	cc_bool success;   /* Whether the task completed successfully. */
	
	int reqID; /* Unique request identifier for this web task. */
	/* Called when task successfully downloaded/uploaded data. */
	void (*Handle)(cc_uint8* data, cc_uint32 len);
};
typedef void (*LWebTask_ErrorCallback)(struct HttpRequest* req);

void LWebTask_Tick(struct LWebTask* task, LWebTask_ErrorCallback errorCallback);
void LWebTasks_Init(void);


extern struct GetTokenTaskData {
	struct LWebTask Base;
	cc_string token;    /* Random CSRF token for logging in. */
	cc_string username; /* Username if session is already logged in. */
	cc_bool   error;    /* Whether a signin error occurred */
} GetTokenTask;
void GetTokenTask_Run(void);

extern struct SignInTaskData {
	struct LWebTask Base;
	cc_string username; /* Username to sign in as. Changed to case correct username. */
	const char* error;  /* If sign in fails, the reason why. */
	cc_bool needMFA;    /* need login code for multifactor authentication */
} SignInTask;
void SignInTask_Run(const cc_string* user, const cc_string* pass, const cc_string* mfaCode);


extern struct FetchServerData {
	struct LWebTask Base;
	struct ServerInfo server; /* Details about the given server on success. */
} FetchServerTask;
void FetchServerTask_Run(const cc_string* hash);


extern struct FetchServersData {
	struct LWebTask Base;
	struct ServerInfo* servers; /* List of all public servers on server list. */
	cc_uint16* orders;          /* Order of each server (after sorting) */
	int numServers;             /* Number of public servers. */
} FetchServersTask;
void FetchServersTask_Run(void);
void FetchServersTask_ResetOrder(void);
#define Servers_Get(i) (&FetchServersTask.servers[FetchServersTask.orders[i]])


extern struct CheckUpdateData {
	struct LWebTask Base;
	/* Unix timestamp latest commit/dev build and release were at. */
	cc_uint64 devTimestamp, relTimestamp;
	/* Version of latest release. */
	cc_string latestRelease;
} CheckUpdateTask; /* TODO: Work out the JSON for this.. */
void CheckUpdateTask_Run(void);


extern struct FetchUpdateData {
	struct LWebTask Base;
	/* Unix timestamp downloaded build was originally built at. */
	cc_uint64 timestamp;
} FetchUpdateTask;
void FetchUpdateTask_Run(cc_bool release, int buildIndex);


extern struct FetchFlagsData { 
	struct LWebTask Base;
	/* Number of flags downloaded. */
	int count;
} FetchFlagsTask;

/* Asynchronously downloads the flag associated with the given server's country. */
void FetchFlagsTask_Add(const struct ServerInfo* server);
/* Gets the country flag associated with the given server's country. */
struct Flag* Flags_Get(const struct ServerInfo* server);
/* Frees all flag bitmaps. */
void Flags_Free(void);

void Session_Load(void);
void Session_Save(void);
#endif