#include "clar_libgit2.h"
#include <git2/types.h>
#include "commit.h"
#include "signature.h"

// Fixture setup
static git_repository *g_repo;
void test_commit_parse__initialize(void)
{
   g_repo = cl_git_sandbox_init("testrepo");
}
void test_commit_parse__cleanup(void)
{
   cl_git_sandbox_cleanup();
}


// Header parsing
typedef struct {
   const char *line;
   const char *header;
} parse_test_case;

static parse_test_case passing_header_cases[] = {
   { "parent 05452d6349abcd67aa396dfb28660d765d8b2a36\n", "parent " },
   { "tree 05452d6349abcd67aa396dfb28660d765d8b2a36\n", "tree " },
   { "random_heading 05452d6349abcd67aa396dfb28660d765d8b2a36\n", "random_heading " },
   { "stuck_heading05452d6349abcd67aa396dfb28660d765d8b2a36\n", "stuck_heading" },
   { "tree 5F4BEFFC0759261D015AA63A3A85613FF2F235DE\n", "tree " },
   { "tree 1A669B8AB81B5EB7D9DB69562D34952A38A9B504\n", "tree " },
   { "tree 5B20DCC6110FCC75D31C6CEDEBD7F43ECA65B503\n", "tree " },
   { "tree 173E7BF00EA5C33447E99E6C1255954A13026BE4\n", "tree " },
   { NULL, NULL }
};

static parse_test_case failing_header_cases[] = {
   { "parent 05452d6349abcd67aa396dfb28660d765d8b2a36", "parent " },
   { "05452d6349abcd67aa396dfb28660d765d8b2a36\n", "tree " },
   { "parent05452d6349abcd67aa396dfb28660d765d8b2a6a\n", "parent " },
   { "parent 05452d6349abcd67aa396dfb280d765d8b2a6\n", "parent " },
   { "tree  05452d6349abcd67aa396dfb28660d765d8b2a36\n", "tree " },
   { "parent 0545xd6349abcd67aa396dfb28660d765d8b2a36\n", "parent " },
   { "parent 0545xd6349abcd67aa396dfb28660d765d8b2a36FF\n", "parent " },
   { "", "tree " },
   { "", "" },
   { NULL, NULL }
};

void test_commit_parse__header(void)
{
   git_oid oid;

   parse_test_case *testcase;
   for (testcase = passing_header_cases; testcase->line != NULL; testcase++)
   {
      const char *line = testcase->line;
      const char *line_end = line + strlen(line);

      cl_git_pass(git_oid__parse(&oid, &line, line_end, testcase->header));
      cl_assert(line == line_end);
   }

   for (testcase = failing_header_cases; testcase->line != NULL; testcase++)
   {
      const char *line = testcase->line;
      const char *line_end = line + strlen(line);

      cl_git_fail(git_oid__parse(&oid, &line, line_end, testcase->header));
   }
}


// Signature parsing
typedef struct {
   const char *string;
   const char *header;
   const char *name;
   const char *email;
   git_time_t time;
   int offset;
} passing_signature_test_case;

passing_signature_test_case passing_signature_cases[] = {
	{"author Vicent Marti <tanoku@gmail.com> 12345 \n", "author ", "Vicent Marti", "tanoku@gmail.com", 12345, 0},
	{"author Vicent Marti <> 12345 \n", "author ", "Vicent Marti", "", 12345, 0},
	{"author Vicent Marti <tanoku@gmail.com> 231301 +1020\n", "author ", "Vicent Marti", "tanoku@gmail.com", 231301, 620},
	{"author Vicent Marti with an outrageously long name which will probably overflow the buffer <tanoku@gmail.com> 12345 \n", "author ", "Vicent Marti with an outrageously long name which will probably overflow the buffer", "tanoku@gmail.com", 12345, 0},
	{"author Vicent Marti <tanokuwithaveryveryverylongemailwhichwillprobablyvoverflowtheemailbuffer@gmail.com> 12345 \n", "author ", "Vicent Marti", "tanokuwithaveryveryverylongemailwhichwillprobablyvoverflowtheemailbuffer@gmail.com", 12345, 0},
	{"committer Vicent Marti <tanoku@gmail.com> 123456 +0000 \n", "committer ", "Vicent Marti", "tanoku@gmail.com", 123456, 0},
	{"committer Vicent Marti <tanoku@gmail.com> 123456 +0100 \n", "committer ", "Vicent Marti", "tanoku@gmail.com", 123456, 60},
	{"committer Vicent Marti <tanoku@gmail.com> 123456 -0100 \n", "committer ", "Vicent Marti", "tanoku@gmail.com", 123456, -60},
	// Parse a signature without an author field
	{"committer <tanoku@gmail.com> 123456 -0100 \n", "committer ", "", "tanoku@gmail.com", 123456, -60},
	// Parse a signature without an author field
	{"committer  <tanoku@gmail.com> 123456 -0100 \n", "committer ", "", "tanoku@gmail.com", 123456, -60},
	// Parse a signature with an empty author field
	{"committer   <tanoku@gmail.com> 123456 -0100 \n", "committer ", "", "tanoku@gmail.com", 123456, -60},
	// Parse a signature with an empty email field
	{"committer Vicent Marti <> 123456 -0100 \n", "committer ", "Vicent Marti", "", 123456, -60},
	// Parse a signature with an empty email field
	{"committer Vicent Marti < > 123456 -0100 \n", "committer ", "Vicent Marti", "", 123456, -60},
	// Parse a signature with empty name and email
	{"committer <> 123456 -0100 \n", "committer ", "", "", 123456, -60},
	// Parse a signature with empty name and email
	{"committer  <> 123456 -0100 \n", "committer ", "", "", 123456, -60},
	// Parse a signature with empty name and email
	{"committer  < > 123456 -0100 \n", "committer ", "", "", 123456, -60},
	// Parse an obviously invalid signature
	{"committer foo<@bar> 123456 -0100 \n", "committer ", "foo", "@bar", 123456, -60},
	// Parse an obviously invalid signature
	{"committer    foo<@bar>123456 -0100 \n", "committer ", "foo", "@bar", 123456, -60},
	// Parse an obviously invalid signature
	{"committer <>\n", "committer ", "", "", 0, 0},
	{"committer Vicent Marti <tanoku@gmail.com> 123456 -1500 \n", "committer ", "Vicent Marti", "tanoku@gmail.com", 0, 0},
	{"committer Vicent Marti <tanoku@gmail.com> 123456 +0163 \n", "committer ", "Vicent Marti", "tanoku@gmail.com", 0, 0},
	{"author Vicent Marti <tanoku@gmail.com> notime \n", "author ", "Vicent Marti", "tanoku@gmail.com", 0, 0},
	{"author Vicent Marti <tanoku@gmail.com> 123456 notimezone \n", "author ", "Vicent Marti", "tanoku@gmail.com", 0, 0},
	{"author Vicent Marti <tanoku@gmail.com> notime +0100\n", "author ", "Vicent Marti", "tanoku@gmail.com", 0, 0},
	{"author Vicent Marti <tanoku@gmail.com>\n", "author ", "Vicent Marti", "tanoku@gmail.com", 0, 0},
	{"author A U Thor <author@example.com>,  C O. Miter <comiter@example.com> 1234567890 -0700\n", "author ", "A U Thor", "author@example.com", 1234567890, -420},
	{"author A U Thor <author@example.com> and others 1234567890 -0700\n", "author ", "A U Thor", "author@example.com", 1234567890, -420},
	{"author A U Thor <author@example.com> and others 1234567890\n", "author ", "A U Thor", "author@example.com", 1234567890, 0},
	{"author A U Thor> <author@example.com> and others 1234567890\n", "author ", "A U Thor>", "author@example.com", 1234567890, 0},
   {NULL,NULL,NULL,NULL,0,0}
};

typedef struct {
   const char *string;
   const char *header;
} failing_signature_test_case;

failing_signature_test_case failing_signature_cases[] = {
	{"committer Vicent Marti tanoku@gmail.com> 123456 -0100 \n", "committer "},
	{"author Vicent Marti <tanoku@gmail.com> 12345 \n", "author  "},
	{"author Vicent Marti <tanoku@gmail.com> 12345 \n", "committer "},
	{"author Vicent Marti 12345 \n", "author "},
	{"author Vicent Marti <broken@email 12345 \n", "author "},
	{"committer Vicent Marti ><\n", "committer "},
	{"author ", "author "},
   {NULL,NULL,}
};

void test_commit_parse__signature(void)
{
   passing_signature_test_case *passcase;
   failing_signature_test_case *failcase;

   for (passcase = passing_signature_cases; passcase->string != NULL; passcase++)
   {
      const char *str = passcase->string;
      size_t len = strlen(passcase->string);
      struct git_signature person = {0};
      cl_git_pass(git_signature__parse(&person, &str, str + len, passcase->header, '\n'));
      cl_assert(strcmp(passcase->name, person.name) == 0);
      cl_assert(strcmp(passcase->email, person.email) == 0);
      cl_assert(passcase->time == person.when.time);
      cl_assert(passcase->offset == person.when.offset);
      git__free(person.name); git__free(person.email);
   }

   for (failcase = failing_signature_cases; failcase->string != NULL; failcase++)
   {
      const char *str = failcase->string;
      size_t len = strlen(failcase->string);
      git_signature person = {0};
      cl_git_fail(git_signature__parse(&person, &str, str + len, failcase->header, '\n'));
      git__free(person.name); git__free(person.email);
   }
}


static char *failing_commit_cases[] = {
// empty commit
"",
// random garbage
"asd97sa9du902e9a0jdsuusad09as9du098709aweu8987sd\n",
// broken endlines 1
"tree f6c0dad3c7b3481caa9d73db21f91964894a945b\r\n\
parent 05452d6349abcd67aa396dfb28660d765d8b2a36\r\n\
author Vicent Marti <tanoku@gmail.com> 1273848544 +0200\r\n\
committer Vicent Marti <tanoku@gmail.com> 1273848544 +0200\r\n\
\r\n\
a test commit with broken endlines\r\n",
// broken endlines 2
"tree f6c0dad3c7b3481caa9d73db21f91964894a945b\
parent 05452d6349abcd67aa396dfb28660d765d8b2a36\
author Vicent Marti <tanoku@gmail.com> 1273848544 +0200\
committer Vicent Marti <tanoku@gmail.com> 1273848544 +0200\
\
another test commit with broken endlines",
// starting endlines
"\ntree f6c0dad3c7b3481caa9d73db21f91964894a945b\n\
parent 05452d6349abcd67aa396dfb28660d765d8b2a36\n\
author Vicent Marti <tanoku@gmail.com> 1273848544 +0200\n\
committer Vicent Marti <tanoku@gmail.com> 1273848544 +0200\n\
\n\
a test commit with a starting endline\n",
// corrupted commit 1
"tree f6c0dad3c7b3481caa9d73db21f91964894a945b\n\
parent 05452d6349abcd67aa396df",
// corrupted commit 2
"tree f6c0dad3c7b3481caa9d73db21f91964894a945b\n\
parent ",
// corrupted commit 3
"tree f6c0dad3c7b3481caa9d73db21f91964894a945b\n\
parent ",
// corrupted commit 4
"tree f6c0dad3c7b3481caa9d73db21f91964894a945b\n\
par",
};


static char *passing_commit_cases[] = {
// simple commit with no message
"tree 1810dff58d8a660512d4832e740f692884338ccd\n\
author Vicent Marti <tanoku@gmail.com> 1273848544 +0200\n\
committer Vicent Marti <tanoku@gmail.com> 1273848544 +0200\n\
\n",
// simple commit, no parent
"tree 1810dff58d8a660512d4832e740f692884338ccd\n\
author Vicent Marti <tanoku@gmail.com> 1273848544 +0200\n\
committer Vicent Marti <tanoku@gmail.com> 1273848544 +0200\n\
\n\
a simple commit which works\n",
// simple commit, no parent, no newline in message
"tree 1810dff58d8a660512d4832e740f692884338ccd\n\
author Vicent Marti <tanoku@gmail.com> 1273848544 +0200\n\
committer Vicent Marti <tanoku@gmail.com> 1273848544 +0200\n\
\n\
a simple commit which works",
// simple commit, 1 parent
"tree 1810dff58d8a660512d4832e740f692884338ccd\n\
parent e90810b8df3e80c413d903f631643c716887138d\n\
author Vicent Marti <tanoku@gmail.com> 1273848544 +0200\n\
committer Vicent Marti <tanoku@gmail.com> 1273848544 +0200\n\
\n\
a simple commit which works\n",
};

void test_commit_parse__entire_commit(void)
{
	const int broken_commit_count = sizeof(failing_commit_cases) / sizeof(*failing_commit_cases);
	const int working_commit_count = sizeof(passing_commit_cases) / sizeof(*passing_commit_cases);
	int i;

	for (i = 0; i < broken_commit_count; ++i) {
		git_commit *commit;
		commit = (git_commit*)git__malloc(sizeof(git_commit));
		memset(commit, 0x0, sizeof(git_commit));
		commit->object.repo = g_repo;

		cl_git_fail(git_commit__parse_buffer(
                     commit,
                     failing_commit_cases[i],
                     strlen(failing_commit_cases[i]))
         );

		git_commit__free(commit);
	}

	for (i = 0; i < working_commit_count; ++i) {
		git_commit *commit;

		commit = (git_commit*)git__malloc(sizeof(git_commit));
		memset(commit, 0x0, sizeof(git_commit));
		commit->object.repo = g_repo;

		cl_git_pass(git_commit__parse_buffer(
                     commit,
                     passing_commit_cases[i],
                     strlen(passing_commit_cases[i]))
         );

		git_commit__free(commit);

		commit = (git_commit*)git__malloc(sizeof(git_commit));
		memset(commit, 0x0, sizeof(git_commit));
		commit->object.repo = g_repo;

		cl_git_pass(git_commit__parse_buffer(
                     commit,
                     passing_commit_cases[i],
                     strlen(passing_commit_cases[i]))
         );

		git_commit__free(commit);
	}
}


// query the details on a parsed commit
void test_commit_parse__details0(void) {
   static const char *commit_ids[] = {
      "a4a7dce85cf63874e984719f4fdd239f5145052f", /* 0 */
      "9fd738e8f7967c078dceed8190330fc8648ee56a", /* 1 */
      "4a202b346bb0fb0db7eff3cffeb3c70babbd2045", /* 2 */
      "c47800c7266a2be04c571c04d5a6614691ea99bd", /* 3 */
      "8496071c1b46c854b31185ea97743be6a8774479", /* 4 */
      "5b5b025afb0b4c913b4c338a42934a3863bf3644", /* 5 */
      "a65fedf39aefe402d3bb6e24df4d4f5fe4547750", /* 6 */
   };
	const size_t commit_count = sizeof(commit_ids) / sizeof(const char *);
   unsigned int i;

	for (i = 0; i < commit_count; ++i) {
		git_oid id;
		git_commit *commit;

		const git_signature *author, *committer;
		const char *message;
		git_time_t commit_time;
		unsigned int parents, p;
		git_commit *parent = NULL, *old_parent = NULL;

		git_oid_fromstr(&id, commit_ids[i]);

		cl_git_pass(git_commit_lookup(&commit, g_repo, &id));

		message = git_commit_message(commit);
		author = git_commit_author(commit);
		committer = git_commit_committer(commit);
		commit_time = git_commit_time(commit);
		parents = git_commit_parentcount(commit);

		cl_assert(strcmp(author->name, "Scott Chacon") == 0);
		cl_assert(strcmp(author->email, "schacon@gmail.com") == 0);
		cl_assert(strcmp(committer->name, "Scott Chacon") == 0);
		cl_assert(strcmp(committer->email, "schacon@gmail.com") == 0);
		cl_assert(message != NULL);
		cl_assert(strchr(message, '\n') != NULL);
		cl_assert(commit_time > 0);
		cl_assert(parents <= 2);
		for (p = 0;p < parents;p++) {
			if (old_parent != NULL)
				git_commit_free(old_parent);

			old_parent = parent;
			cl_git_pass(git_commit_parent(&parent, commit, p));
			cl_assert(parent != NULL);
			cl_assert(git_commit_author(parent) != NULL); // is it really a commit?
		}
		git_commit_free(old_parent);
		git_commit_free(parent);

		cl_git_fail(git_commit_parent(&parent, commit, parents));
		git_commit_free(commit);
	}
}