#include <string.h>
#include <unistd.h>
#include <math.h>
#include <grass/gis.h>
#include <grass/display.h>
#include <grass/colors.h>
#include <grass/vector.h>
#include <grass/dbmi.h>
#include <grass/glocale.h>
#include "what.h"

/* TODO: remove leftover from interactive querying */
static int nlines = 50;

#define WDTH 5
#define SEP "------------------------------------------------------------------"

static void F_generate(const char *drvname, const char *dbname,
		       const char *tblname, const char *key, int keyval,
		       int script, int json, char **form)
{
    int col, ncols, sqltype, more;
    char buf[5000];
    const char *colname;
    dbString sql, html, str;
    dbDriver *driver;
    dbHandle handle;
    dbCursor cursor;
    dbTable *table;
    dbColumn *column;
    dbValue *value;

    G_debug(2,
	    "F_generate(): drvname = '%s', dbname = '%s', tblname = '%s', key = '%s', keyval = %d",
	    drvname, dbname, tblname, key, keyval);

    db_init_string(&sql);
    db_init_string(&html);	/* here is the result stored */
    db_init_string(&str);

    G_debug(2, "Open driver");
    driver = db_start_driver(drvname);
    if (!driver)
	G_fatal_error(_("Cannot open driver"));

    G_debug(2, "Driver opened");

    db_init_handle(&handle);
    db_set_handle(&handle, dbname, NULL);
    G_debug(2, "Open database");
    if (db_open_database(driver, &handle) != DB_OK)
	G_fatal_error(_("Cannot open database"));
    db_set_error_handler_driver(driver);

    G_debug(2, "Database opened");

    /* TODO: test if table exist first, but this should be tested by application befor
     *        F_generate() is called, because it may be correct (connection defined in DB
     *        but table does not exist) */

    sprintf(buf, "select * from %s where %s = %d", tblname, key, keyval);
    G_debug(2, "%s", buf);
    db_set_string(&sql, buf);
    if (db_open_select_cursor(driver, &sql, &cursor, DB_SEQUENTIAL) != DB_OK)
	G_fatal_error(_("Cannot open select cursor"));

    G_debug(2, "Select Cursor opened");

    table = db_get_cursor_table(&cursor);

    if (db_fetch(&cursor, DB_NEXT, &more) != DB_OK)
	G_fatal_error(_("Cannot fetch next record"));

    if (!more) {
	G_warning(_("No database record"));
	*form = G_store("No record selected.");
    }
    else {
	ncols = db_get_table_number_of_columns(table);

	/* Start form */
	for (col = 0; col < ncols; col++) {
	    column = db_get_table_column(table, col);
	    sqltype = db_get_column_sqltype(column);
	    value = db_get_column_value(column);
	    db_convert_value_to_string(value, sqltype, &str);
	    colname = db_get_column_name(column);

	    G_debug(2, "%s: %s", colname, db_get_string(&str));
	    if (json) {
		sprintf(buf, "%s\"%s\": \"%s\"", col == 0 ? "" : ",\n",
			colname, db_get_string(&str));
	    }
	    else if (script)
		sprintf(buf, "%s=%s\n", colname, db_get_string(&str));
	    else
		sprintf(buf, "%s : %s\n", colname, db_get_string(&str));
	    db_append_string(&html, buf);
	}
    }
    G_debug(2, "FORM STRING:%s", db_get_string(&html));

    db_close_cursor(&cursor);
    db_close_database(driver);
    db_shutdown_driver(driver);

    *form = G_store(db_get_string(&html));

    db_free_string(&sql);
    db_free_string(&html);
    db_free_string(&str);
}

void what(struct Map_info *Map, int nvects, char **vect, double east, double north,
          double maxdist, int qtype, int topo, int showextra, int script, int json, int *field)
{
    int type;
    char east_buf[40], north_buf[40];
    double sq_meters, sqm_to_sqft, acres, hectares, sq_miles;
    double z, l;
    int getz;
    struct field_info *Fi;
    plus_t line, area, centroid;
    int i;
    struct line_pnts *Points;
    struct line_cats *Cats;
    char buf[1000], *str;
    dbString html;
    char *form;

    Points = Vect_new_line_struct();
    Cats = Vect_new_cats_struct();
    db_init_string(&html);

    /* always use plain feet not US survey ft */
    /*  if you really want USfeet, try G_database_units_to_meters_factor()
        here, but then watch that sq_miles is not affected too */
    sqm_to_sqft = 1 / ( 0.0254 * 0.0254 * 12 * 12 );


    for (i = 0; i < nvects; i++) {
	/* init variables */
	area = 0;
	getz = 0;
	z = 0;
	l = 0;
	line = 0;

	Vect_reset_cats(Cats);
	Vect_reset_line(Points);

	/* Try to find point first and only if no one was found try lines,
	 *  otherwise point on line could not be selected and similarly for areas */
	
	type = (GV_POINTS & qtype);
	if (type) {
	    line =
		Vect_find_line(&Map[i], east, north, 0.0, type,
			       maxdist, 0, 0);
	}
	type = ((GV_LINE | GV_BOUNDARY | GV_FACE) & qtype);
	if (line == 0 && type) {
	    line = Vect_find_line(&Map[i], east, north, 0.0,
				  type, maxdist, 0, 0);
	}

	if (line == 0 && (qtype & GV_AREA)) {
	    area = Vect_find_area(&Map[i], east, north);
	    getz = Vect_tin_get_z(&Map[i], east, north, &z, NULL, NULL);
	}

	G_debug(2, "line = %d area = %d", line, area);

	if (!i) {
	    G_format_easting(east, east_buf, G_projection());
	    G_format_northing(north, north_buf, G_projection());
	    if (line + area > 0 || G_verbose() >= G_verbose_std()) {
		if (script) {
		    fprintf(stdout, "East=%s\nNorth=%s\n", east_buf,
			    north_buf);
		}
		else if (json) {
		    fprintf(stdout, "{\"Coordinates\": {\"East\": \"%s\", \"North\": \"%s\"}",
			    east_buf, north_buf);
		}
		else {
		    fprintf(stdout, "East: %s\nNorth: %s\n", east_buf,
			    north_buf);
		}
	    }
	    nlines++;
	}

	strcpy(buf, vect[i]);
	if ((str = strchr(buf, '@')))
	    *str = 0;

	if (script) {
	    fprintf(stdout, "\nMap=%s\nMapset=%s\n", Map[i].name,
		    Map[i].mapset);
	}
	else if (json) {
	    if (!i) {
		if (line + area > 0 || G_verbose() >= G_verbose_std())
		    fprintf(stdout, ",\n\"Maps\":\n[{\"Map\": \"%s\",\n\"Mapset\": \"%s\"",
			    Map[i].name, Map[i].mapset);
		else
		    fprintf(stdout, "{\"Maps\":\n[{\"Map\": \"%s\",\n\"Mapset\": \"%s\"",
			    Map[i].name, Map[i].mapset);
	    }
	    else
		fprintf(stdout, ",\n{\"Map\": \"%s\",\n\"Mapset\": \"%s\"",
			Map[i].name, Map[i].mapset);
	}
	else {
	    fprintf(stdout, "%s", SEP);
	    fprintf(stdout, "\nMap: %s \nMapset: %s\n", Map[i].name,
		    Map[i].mapset);
	}
	
	nlines++;

	if (line + area == 0) {
	    if (json)
		fprintf(stdout, "}\n");
	    else if (!script) 
		fprintf(stdout, _("Nothing found.\n"));
	    nlines++;
	    continue;
	}

	if (line > 0) {
	    type = Vect_read_line(&Map[i], Points, Cats, line);

	    if (field[i] != -1 && !Vect_cat_get(Cats, field[i], NULL)) {
		if (json) {
		    fprintf(stdout, "}\n");
		}
		continue;
	    }
	    
	    switch (type) {
	    case GV_POINT:
		sprintf(buf, "Point");
		break;
	    case GV_LINE:
		sprintf(buf, "Line");
		break;
	    case GV_BOUNDARY:
		sprintf(buf, "Boundary");
		break;
	    case GV_FACE:
		sprintf(buf, "Face");
		break;
	    case GV_CENTROID:
		sprintf(buf, "Centroid");
		break;
	    default:
		sprintf(buf, "Unknown");
	    }
	    if (type & GV_LINES) {
		if (G_projection() == 3)
		    l = Vect_line_geodesic_length(Points);
		else
		    l = Vect_line_length(Points);
	    }


	    if (topo) {
		int n, node[2], nnodes, nnlines, nli, nodeline, left, right;
		float angle;

		if (type & GV_BOUNDARY)
		    Vect_get_line_areas(&(Map[i]), line, &left, &right);
		else
		    left = right = 0;
		if (script) {
		    fprintf(stdout, "Feature_max_distance=%f\n", maxdist);
		    fprintf(stdout,
			    "Id=%d\nType=%s\nLeft=%d\nRight=%d\n",
			    line, buf, left, right);
		}
		else if (json) {
		    fprintf(stdout, ",\n\"Feature_max_distance\": %f", maxdist);
		    fprintf(stdout,
			    ",\n\"Id\": %d,\n\"Type\": \"%s\",\n\"Left\": %d,\n\"Right\": %d",
			    line, buf, left, right);
		}
		else {
		    fprintf(stdout, "Looking for features within: %f\n",
			    maxdist);
		    fprintf(stdout,
			    _("Id: %d\nType: %s\nLeft: %d\nRight: %d\n"),
			    line, buf, left, right);
		}
		if (type & GV_LINES) {
		    nnodes = 2;
		    fprintf(stdout, _("Length: %f\n"), l);
		}
		else {		/* points */
		    nnodes = 0;
		    if (!script)
			fprintf(stdout, "\n");
		}

		if (nnodes > 0)
		    Vect_get_line_nodes(&(Map[i]), line, &node[0], &node[1]);

		for (n = 0; n < nnodes; n++) {
		    double nx, ny, nz;

		    nnlines = Vect_get_node_n_lines(&(Map[i]), node[n]);

		    Vect_get_node_coor(&(Map[i]), node[n], &nx, &ny, &nz);
		    if (script) {
			fprintf(stdout,
				_("Node[%d]=%d\nNumber_lines=%d\nCoordinates=%.6f,%.6f,%.6f\n"),
				n, node[n], nnlines, nx, ny, nz);
		    }
		    else if (json) {
			fprintf(stdout,
				_(",\n\"Node[%d]\": %d,\n\"Number_lines\": %d,\n\"Coordinates\": %.6f,%.6f,%.6f"),
				n, node[n], nnlines, nx, ny, nz);
		    }
		    else {
			fprintf(stdout,
				_("Node[%d]: %d\nNumber of lines: %d\nCoordinates: %.6f, %.6f, %.6f\n"),
				n, node[n], nnlines, nx, ny, nz);
		    }

		    for (nli = 0; nli < nnlines; nli++) {
			nodeline =
			    Vect_get_node_line(&(Map[i]), node[n], nli);
			angle =
			    Vect_get_node_line_angle(&(Map[i]), node[n], nli);
			if (script) {
			    fprintf(stdout, "Id=%5d\nAngle=%.8f\n",
				    nodeline, angle);
			}
			else if (json) {
			    fprintf(stdout, ",\n\"Id\": %5d,\n\"Angle\": %.8f",
				    nodeline, angle);
			}
			else {
			    fprintf(stdout, _("Id: %5d\nAngle: %.8f\n"),
				    nodeline, angle);
			}
		    }
		}
	    }
	    else {
		if (script) {
		    fprintf(stdout, "Type=%s\n", buf);
		    fprintf(stdout, "Id=%d\n", line);
		    if (type & GV_LINES)
			fprintf(stdout, "Length=%f\n", l);
		}
		else if (json) {
		    fprintf(stdout, ",\n\"Type\": \"%s\"", buf);
		    fprintf(stdout, ",\n\"Id\": %d", line);
		    if (type & GV_LINES)
			fprintf(stdout, ",\n\"Length\": %f", l);
		}
		else {
		    fprintf(stdout, _("Type: %s\n"), buf);
		    fprintf(stdout, _("Id: %d\n"), line);
		    if (type & GV_LINES)
			fprintf(stdout, _("Length: %f\n"), l);
		}
	    }

	    /* Height */
	    if (Vect_is_3d(&(Map[i]))) {
		int j;
		double min, max;

		if (type & GV_POINTS) {
		    if (script) {
			fprintf(stdout, "Point_height=%f\n", Points->z[0]);
		    }
		    else if (json) {
			fprintf(stdout, ",\n\"Point_height\": %f", Points->z[0]);
		    }
		    else {
			fprintf(stdout, _("Point height: %f\n"),
				Points->z[0]);
		    }
		}
		else if (type & GV_LINES) {
		    min = max = Points->z[0];
		    for (j = 1; j < Points->n_points; j++) {
			if (Points->z[j] < min)
			    min = Points->z[j];
			if (Points->z[j] > max)
			    max = Points->z[j];
		    }
		    if (min == max) {
			if (script) {
			    fprintf(stdout, "Line_height=%f\n", min);
			}
			else if (json) {
			    fprintf(stdout, ",\n\"Line_height\": %f", min);
			}
			else {
			    fprintf(stdout, _("Line height: %f\n"), min);
			}
		    }
		    else {
			if (script) {
			    fprintf(stdout,
				    "Line_height_min=%f\nLine_height_max=%f\n",
				    min, max);
			}
			else if (json) {
			    fprintf(stdout,
				    ",\n\"Line_height_min\": %f,\n\"Line_height_max\": %f",
				    min, max);
			}
			else {
			    fprintf(stdout,
				    _("Line height min: %f\nLine height max: %f\n"),
				    min, max);
			}
		    }
		}
	    }			/* if height */
	}			/* if line > 0 */

	if (area > 0) {
	    if (Map[i].head.with_z && getz) {
		if (script) {
		    fprintf(stdout, "Type=Area\nArea_height=%f\n", z);
		}
		else if (json) {
		    fprintf(stdout, ",\n\"Type\": \"Area\",\n\"Area_height\": %f", z);
		}
		else {
		fprintf(stdout, _("Type: Area\nArea height: %f\n"), z);
		}
	    }
	    else {
		if (script) {
		    fprintf(stdout, "Type=Area\n");
		}
		else if (json) {
		    fprintf(stdout, ",\n\"Type\": \"Area\"");
		}
		else {
		    fprintf(stdout, _("Type: Area\n"));
		}
	    }


	    sq_meters = Vect_get_area_area(&Map[i], area);
	    hectares  = sq_meters / 10000.;
	    /* 1 acre = 1 chain(66') * 1 furlong(10 chains),
		or if you prefer ( 5280 ft/mi ^2 / 640 acre/sq mi ) */
	    acres = (sq_meters * sqm_to_sqft) / (66 * 660);
	    sq_miles = acres / 640.;


	    if (topo) {
		int nisles, isleidx, isle, isle_area;

		nisles = Vect_get_area_num_isles(&Map[i], area);
		if (script) {
		    fprintf(stdout, "Area=%d\nNumber_isles=%d\n", area,
			    nisles);
		}
		else if (json) {
		    fprintf(stdout, ",\n\"Area\": %d,\n\"Number_isles\": %d", area,
			    nisles);
		}
		else {
		    fprintf(stdout, _("Area: %d\nNumber of isles: %d\n"),
			    area, nisles);
		}

		for (isleidx = 0; isleidx < nisles; isleidx++) {
		    isle = Vect_get_area_isle(&Map[i], area, isleidx);
		    if (script) {
			fprintf(stdout, "Isle[%d]=%d\n", isleidx, isle);
		    }
		    else if (json) {
			fprintf(stdout, ",\n\"Isle[%d]\": %d", isleidx, isle);
		    }
		    else {
			fprintf(stdout, _("Isle[%d]: %d\n"), isleidx, isle);
		    }
		}

		isle = Vect_find_island(&Map[i], east, north);

		if (isle) {
		    isle_area = Vect_get_isle_area(&Map[i], isle);
		    if (script) {
			fprintf(stdout, "Island=%d\nIsland_area=%d\n", isle,
				isle_area);
		    }
		    else if (json) {
			fprintf(stdout, ",\n\"Island\": %d,\n\"Island_area\": %d", isle,
				isle_area);
		    }
		    else {
			fprintf(stdout, _("Island: %d In area: %d\n"), isle,
				isle_area);
		    }
		}
	    }
	    else {
		if (script) {
		    fprintf(stdout, "Sq_Meters=%.3f\nHectares=%.3f\n",
			    sq_meters, hectares);
		    fprintf(stdout, "Acres=%.3f\nSq_Miles=%.4f\n",
			    acres, sq_miles);
		}
		else if (json) {
		    fprintf(stdout, ",\n\"Sq_Meters\": %.3f,\n\"Hectares\": %.3f",
			    sq_meters, hectares);
		    fprintf(stdout, ",\n\"Acres\": %.3f,\n\"Sq_Miles\": %.4f",
			    acres, sq_miles);
		}
		else {
		    fprintf(stdout, _("Sq Meters: %.3f\nHectares: %.3f\n"),
			    sq_meters, hectares);
		    fprintf(stdout, _("Acres: %.3f\nSq Miles: %.4f\n"),
			    acres, sq_miles);
		}
		nlines += 3;
	    }
	    centroid = Vect_get_area_centroid(&Map[i], area);
	    if (centroid > 0) {
		Vect_read_line(&Map[i], Points, Cats, centroid);
	    }
	}			/* if area > 0 */

	if (Cats->n_cats > 0) {
	    int j;
	    char *formbuf1;
	    char *formbuf2;
	    if (json) {
		fprintf(stdout, ",\n\"Categories\": [");
	    }
	    for (j = 0; j < Cats->n_cats; j++) {
		G_debug(2, "field = %d  category = %d\n", Cats->field[j],
			Cats->cat[j]);
		if (script) {
		    fprintf(stdout, "Layer=%d\nCategory=%d\n", Cats->field[j],
			    Cats->cat[j]);
		}
		else if (json) {
		    fprintf(stdout, "%s\n{\"Layer\": %d, \"Category\": %d", j == 0 ? "": ",", 
			    Cats->field[j], Cats->cat[j]);
		}
		else {
		    fprintf(stdout, _("Layer: %d\nCategory: %d\n"),
			    Cats->field[j], Cats->cat[j]);
		}
		Fi = Vect_get_field(&(Map[i]), Cats->field[j]);
		if (Fi != NULL && showextra) {
		    if (script) {
			fprintf(stdout,
				"Driver=%s\nDatabase=%s\nTable=%s\nKey_column=%s\n",
				Fi->driver, Fi->database, Fi->table, Fi->key);
		    }
		    else if (json) {
			/* escape backslash to create valid JSON */
			formbuf2 = G_str_replace(Fi->database, "\\", "\\\\");
			fprintf(stdout,
				",\n\"Driver\": \"%s\",\n\"Database\": \"%s\",\n\"Table\": \"%s\",\n\"Key_column\": \"%s\"",
				Fi->driver, formbuf2, Fi->table, Fi->key);
			G_free(formbuf2);
		    }
		    else {
			fprintf(stdout,
				_("\nDriver: %s\nDatabase: %s\nTable: %s\nKey column: %s\n"),
				Fi->driver, Fi->database, Fi->table, Fi->key);
		    }
		    F_generate(Fi->driver, Fi->database, Fi->table,
			       Fi->key, Cats->cat[j], script, json, &form);

		    if (script) {
			formbuf1 = G_str_replace(form, " ", "_");
			fprintf(stdout, "%s", formbuf1);
			G_free(formbuf1);
		    }
		    else if (json)
			fprintf(stdout, ",\n\"Attributes\": {%s}", form);
		    else
			fprintf(stdout, "%s", form);
		    G_free(form);
		    G_free(Fi);
		}
		if (json) {
		    fprintf(stdout, "}"); /* for cat */
		}
	    }
	    if (json) {
		fprintf(stdout, "]"); /* for list of cats */
	    }
	}
	if (json) {
	    fprintf(stdout, "}"); /* for map */
	}
    }
    if (json) {
        fprintf(stdout, "]}\n"); /* for nvects */
    }

    fflush(stdout);
}
