/** @license 2022 Neil Edelman, distributed under the terms of the
 [MIT License](https://opensource.org/licenses/MIT).

 Scan journal entries for kjv references. */

#include "../src/journal.h"
#include "../src/helper.h"
#include <inttypes.h> /* C99 */
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <limits.h>

struct substring { const char *str; int len; };

/** type, reg, launch, how, height, landing, pilot_min, dual_min, instr_min,
 remarks */
struct glider {
	struct substring type, reg, launch;
	enum launch how;
	unsigned height_ft, pilot_min, dual_min, instr_min;
	struct substring remarks;
};

/** type, reg, launch -- landing, pilot, copilot, dual_min, pilot_min,
 ifrsim_min, ifr_min, remarks */
struct power {
	struct substring type, reg, launch, landing, pilot, copilot;
	unsigned dual_min, pilot_min, ifrsim_min, ifr_min;
	struct substring remarks;
};

/** Could be a glider or power. */
struct flight {
	enum { GLIDER, POWER } type;
	union { struct glider glider; struct power power; };
};

struct flights {
};

/*!conditions:re2c*/

static int scan(union date32 date, const char *const buffer,
	struct flights *const f) {
	const char *YYCURSOR, *YYMARKER, *yyt1, *yyt2, *yyt3, *s0, *s1, *t0, *t1;
	enum flight_type type = Glider;
	uint32_t chapter = 0, verse = 0, verse_end = 0;
	enum YYCONDTYPE condition = yycline;
	size_t line = 1;
	char datestr[12] = {0};
	const char *why = "unexpected";
	assert(buffer && kj);
	YYCURSOR = YYMARKER = yyt1 = buffer;
	/*!re2c /**/
	re2c:define:YYCTYPE = char;
	re2c:yyfill:enable = 0;
	re2c:define:YYGETCONDITION = "condition";
	re2c:define:YYSETCONDITION = "condition = @@;";
	re2c:define:YYGETCONDITION:naked = 1;
	re2c:define:YYSETCONDITION:naked = 1;

	unix_control = [\x01-\x08\x0b-\x1f\x7f];
	ws = [ \t];
	glyph = [^] \ ("\x00" | "\n" | unix_control | ws);
	natural = [1-9][0-9]*;
	lookat = ws* natural ":" natural [ab]? ("-" natural [ab]?)? engage;
	*/
	for( ; ; ) { /*!re2c /**/
		<skip> [^\n\x00] { continue; }
		<skip> "\x00" { why = "no newline at end of file"; goto catch; }
		<skip> "\n" => line { line++; continue; }
		<line> "\x00" { return 1; }
		<line> "\n" { line++; continue; }
		<line> * :=> skip /* Guess it can't be simplified? */
		<line> "[glider]" :=> glider
		<line> "[flight]" :=> flight
		/* "M" - Motor Car Tow
		 "W" - Winch
		 "A" - Aero Tow */
		/* type; registration; launch -- landing; pic; sic;
		 single engine day dual; pilot; instrument simulated; actual; remarks */
		<book> * { why = "default unrecognized"; goto catch; }
		/* 19:15a, just ignore the a. */
		<book> ws+ @s0 natural @s1 ":" @t0 natural @t1 [ab]? {
			if(chapter || verse || verse_end)
				{ why = "reference unrecognized"; goto catch; }
			if(!helper_natural(s0, s1, &chapter)
				|| !helper_natural(t0, t1, &verse))
				{ why = "reference numerical error"; goto catch; }
			continue;
		}
		<book> "-" @s0 natural @s1 [ab]? { /* Verse range. */
			if(!chapter || !verse || verse_end)
				{ why = "range unrecognized"; goto catch; }
			if(!helper_natural(s0, s1, &verse_end))
				{ why = "range numerical error"; goto catch; }
			continue;
		}
		<book> engage => skip {
			char citestr[12];
			if(!chapter || !verse) { why = "missing information"; goto catch; }
			if(verse_end && verse_end <= verse)
				{ why = "interval error"; goto catch; }
			union kjvcite cite
				= { .book = book, .chapter = chapter, .verse = verse };
			if(!datestr[0]) date32_to_string(date, &datestr); /* Only once. */
			kjvcite_to_string(cite, &citestr);
			for( ; ; verse++, cite.verse++) {
				if(!kjv_add(kj, cite)) { why = "add to set"; goto catch; }
				if(!verse_end || verse_end <= verse) break;
			}
			printf("%s\t%zu\t%zu\t%zu\t# ",
				datestr, kj->words.verse, kj->words.set, kj->words.cumulative);
			if(verse_end) {
				printf("%s-%" PRIu32 "\n", citestr, verse_end);
			} else {
				printf("%s\n", citestr);
			}
			book = Revelation, chapter = 0, verse = 0, verse_end = 0;
			continue;
		}
	*/ }
	assert(0); /* Never gets here. */
catch:
	if(!errno) errno = EILSEQ;
	date32_to_string(date, &datestr);
	fprintf(stderr, "%s\n"
		"%s line %zu: %s.\n", buffer, datestr, line, why);
	return 0;
}

int main(void) {
	int success = EXIT_SUCCESS;
	struct journal j;
	struct journal_iterator it;
	struct kjv kj = kjv();
	union date32 k;
	union load *v;
	size_t i;
	j = journal();
	if(!journal_is_valid(&j)) goto catch;
	fprintf(stderr, "Journal: %s.\n", journal_to_string(&j));
	printf("set term postscript eps enhanced\n"
		"set output \"kjv.eps\"\n"
		"$Data <<EOD\n"
		"# date\tverse\tset\tcumulative / %zu\n", kj.words.total);
	it = journal_begin(&j), i = 0; while(journal_next(&it, &k, &v))
		if(!scan(k, v->text, &kj)) goto catch;
	printf("EOD\n"
		"set monochrome\n"
		"set xdata time\n"
		"set timefmt \"%%Y-%%m-%%d\"\n"
		"set xtics format \"%%Y-%%m-%%d\" rotate by -30\n"
		"set ylabel \"words in KJV\"\n"
		"set format y \"%%g%%%%\"\n"
		"set key top left\n"
		"set grid\n"
		"unset border\n"
		"#set style fill solid 0.1 #pattern 5 (better, but restarts)\n"
		"plot $Data using 1:($3)*100/%zu with fillsteps lw 2 title \"set\", \\\n"
		"$Data using 1:($4)*100/%zu with steps lw 1 title \"cumulative\"\n",
		kj.words.total, kj.words.total);
	goto finally;
catch:
	success = EXIT_FAILURE;
	perror("journal");
finally:
	journal_(&j);
	return success;
}