#include "../bech32.c"
#include "../bolt11.c"
#include "../hash_u5.c"
#include <ccan/err/err.h>
#include <ccan/mem/mem.h>
#include <ccan/str/hex/hex.h>
#include <stdio.h>

/* AUTOGENERATED MOCKS START */
/* Generated stub for fromwire_pubkey */
void fromwire_pubkey(const u8 **cursor UNNEEDED, size_t *max UNNEEDED, struct pubkey *pubkey UNNEEDED)
{ fprintf(stderr, "fromwire_pubkey called!\n"); abort(); }
/* Generated stub for fromwire_short_channel_id */
void fromwire_short_channel_id(const u8 **cursor UNNEEDED, size_t *max UNNEEDED,
			       struct short_channel_id *short_channel_id UNNEEDED)
{ fprintf(stderr, "fromwire_short_channel_id called!\n"); abort(); }
/* Generated stub for fromwire_u16 */
u16 fromwire_u16(const u8 **cursor UNNEEDED, size_t *max UNNEEDED)
{ fprintf(stderr, "fromwire_u16 called!\n"); abort(); }
/* Generated stub for fromwire_u64 */
u64 fromwire_u64(const u8 **cursor UNNEEDED, size_t *max UNNEEDED)
{ fprintf(stderr, "fromwire_u64 called!\n"); abort(); }
/* Generated stub for towire_pubkey */
void towire_pubkey(u8 **pptr UNNEEDED, const struct pubkey *pubkey UNNEEDED)
{ fprintf(stderr, "towire_pubkey called!\n"); abort(); }
/* Generated stub for towire_short_channel_id */
void towire_short_channel_id(u8 **pptr UNNEEDED,
			     const struct short_channel_id *short_channel_id UNNEEDED)
{ fprintf(stderr, "towire_short_channel_id called!\n"); abort(); }
/* Generated stub for towire_u16 */
void towire_u16(u8 **pptr UNNEEDED, u16 v UNNEEDED)
{ fprintf(stderr, "towire_u16 called!\n"); abort(); }
/* Generated stub for towire_u64 */
void towire_u64(u8 **pptr UNNEEDED, u64 v UNNEEDED)
{ fprintf(stderr, "towire_u64 called!\n"); abort(); }
/* AUTOGENERATED MOCKS END */

static struct privkey privkey;

static bool test_sign(const u5 *u5bytes,
		      const u8 *hrpu8,
		      secp256k1_ecdsa_recoverable_signature *rsig,
		      void *unused)
{
	struct hash_u5 hu5;
	char *hrp;
	struct sha256 sha;

	hrp = tal_dup_arr(NULL, char, (char *)hrpu8, tal_len(hrpu8), 1);
	hrp[tal_len(hrpu8)] = '\0';

	hash_u5_init(&hu5, hrp);
	hash_u5(&hu5, u5bytes, tal_len(u5bytes));
	hash_u5_done(&hu5, &sha);
	tal_free(hrp);

        if (!secp256k1_ecdsa_sign_recoverable(secp256k1_ctx, rsig,
                                              (const u8 *)&sha,
                                              privkey.secret.data,
                                              NULL, NULL))
		abort();

	return true;
}

static void test_b11(const char *b11str,
		     const struct bolt11 *expect_b11,
		     const char *hashed_desc)
{
	struct bolt11 *b11;
	const void *tmpctx = tal_tmpctx(NULL);
	char *fail;
	char *reproduce;

	b11 = bolt11_decode(tmpctx, b11str, hashed_desc, &fail);
	if (!b11)
		errx(1, "%s:%u:%s", __FILE__, __LINE__, fail);

	assert(b11->chain == expect_b11->chain);
	assert(b11->timestamp == expect_b11->timestamp);
	if (!b11->msatoshi)
		assert(!expect_b11->msatoshi);
	else
		assert(*b11->msatoshi == *expect_b11->msatoshi);
	assert(structeq(&b11->payment_hash, &expect_b11->payment_hash));
	if (!b11->description)
		assert(!expect_b11->description);
	else
		assert(streq(b11->description, expect_b11->description));

	assert(b11->expiry == expect_b11->expiry);
	assert(b11->min_final_cltv_expiry == expect_b11->min_final_cltv_expiry);

	if (!b11->fallback)
		assert(!expect_b11->fallback);
	else
		assert(memeq(b11->fallback, tal_len(b11->fallback),
			     expect_b11->fallback,
			     tal_len(expect_b11->fallback)));

	/* FIXME: compare routes. */
	assert(tal_count(b11->routes) == tal_count(expect_b11->routes));

	/* FIXME: compare extra fields. */
	assert(list_empty(&b11->extra_fields) == list_empty(&expect_b11->extra_fields));

	/* Re-encode to check */
	reproduce = bolt11_encode(tmpctx, b11, false, test_sign, NULL);
	for (size_t i = 0; i < strlen(reproduce); i++) {
		if (reproduce[i] != b11str[i])
			abort();
	}
	assert(streq(reproduce, b11str));
	tal_free(tmpctx);
}

int main(void)
{
	struct bolt11 *b11;
	struct pubkey node;
	u64 msatoshi;
	const void *ctx = tal_tmpctx(NULL);

	secp256k1_ctx = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY
						 | SECP256K1_CONTEXT_SIGN);

	/* BOLT #11:
	 *
	 * # Examples
	 *
	 * NB: all the following examples are signed with `priv_key`=`e126f68f7eafcc8b74f54d269fe206be715000f94dac067d1c04a8ca3b2db734`.
	 */
	if (!hex_decode("e126f68f7eafcc8b74f54d269fe206be715000f94dac067d1c04a8ca3b2db734",
			strlen("e126f68f7eafcc8b74f54d269fe206be715000f94dac067d1c04a8ca3b2db734"),
			&privkey, sizeof(privkey)))
		abort();

	/* BOLT #11:
	 *
	 * > ### Please make a donation of any amount using payment_hash 0001020304050607080900010203040506070809000102030405060708090102 to me @03e7156ae33b0a208d0744199163177e909e80176e55d97a2f221ede0f934dd9ad
	 * > lnbc1pvjluezpp5qqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqypqdpl2pkx2ctnv5sxxmmwwd5kgetjypeh2ursdae8g6twvus8g6rfwvs8qun0dfjkxaq8rkx3yf5tcsyz3d73gafnh3cax9rn449d9p5uxz9ezhhypd0elx87sjle52x86fux2ypatgddc6k63n7erqz25le42c4u4ecky03ylcqca784w
	 */
	if (!pubkey_from_hexstr("03e7156ae33b0a208d0744199163177e909e80176e55d97a2f221ede0f934dd9ad", strlen("03e7156ae33b0a208d0744199163177e909e80176e55d97a2f221ede0f934dd9ad"), &node))
		abort();

	/* BOLT #11:
	 *
	 * Breakdown:
	 *
	 * * `lnbc`: prefix, lightning on bitcoin mainnet
	 * * `1`: Bech32 separator
	 * * `pvjluez`: timestamp (1496314658)
	 * * `p`: payment hash
	 *   * `p5`: `data_length` (`p` = 1, `5` = 20. 1 * 32 + 20 == 52)
	 *   * `qqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqypq`: payment hash 0001020304050607080900010203040506070809000102030405060708090102
	 * * `d`: short description
	 *   * `pl`: `data_length` (`p` = 1, `l` = 31. 1 * 32 + 31 == 63)
	 *   * `2pkx2ctnv5sxxmmwwd5kgetjypeh2ursdae8g6twvus8g6rfwvs8qun0dfjkxaq`: 'Please consider supporting this project'
	 * * `8rkx3yf5tcsyz3d73gafnh3cax9rn449d9p5uxz9ezhhypd0elx87sjle52x86fux2ypatgddc6k63n7erqz25le42c4u4ecky03ylcq`: signature
	 * * `ca784w`: Bech32 checksum
	 */
	b11 = new_bolt11(ctx, NULL);
	b11->chain = chainparams_for_network("bitcoin");
	b11->timestamp = 1496314658;
	if (!hex_decode("0001020304050607080900010203040506070809000102030405060708090102",
			strlen("0001020304050607080900010203040506070809000102030405060708090102"),
			&b11->payment_hash, sizeof(b11->payment_hash)))
		abort();
	b11->receiver_id = node;
	b11->description = "Please consider supporting this project";

	test_b11("lnbc1pvjluezpp5qqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqypqdpl2pkx2ctnv5sxxmmwwd5kgetjypeh2ursdae8g6twvus8g6rfwvs8qun0dfjkxaq8rkx3yf5tcsyz3d73gafnh3cax9rn449d9p5uxz9ezhhypd0elx87sjle52x86fux2ypatgddc6k63n7erqz25le42c4u4ecky03ylcqca784w", b11, NULL);

	/* BOLT #11:
	 *
	 * > ### Please send $3 for a cup of coffee to the same peer, within 1 minute
	 * > lnbc2500u1pvjluezpp5qqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqypqdq5xysxxatsyp3k7enxv4jsxqzpuaztrnwngzn3kdzw5hydlzf03qdgm2hdq27cqv3agm2awhz5se903vruatfhq77w3ls4evs3ch9zw97j25emudupq63nyw24cg27h2rspfj9srp
	 *
	 * Breakdown:
	 *
	 * * `lnbc`: prefix, lightning on bitcoin mainnet
	 * * `2500u`: amount (2500 micro-bitcoin)
	 * * `1`: Bech32 separator
	 * * `pvjluez`: timestamp (1496314658)
	 * * `p`: payment hash...
	 * * `d`: short description
	 *   * `q5`: `data_length` (`q` = 0, `5` = 20. 0 * 32 + 20 == 20)
	 *   * `xysxxatsyp3k7enxv4js`: '1 cup coffee'
	 * * `x`: expiry time
	 *   * `qz`: `data_length` (`q` = 0, `z` = 2. 0 * 32 + 2 == 2)
	 *   * `pu`: 60 seconds (`p` = 1, `u` = 28.  1 * 32 + 28 == 60)
	 * * `aztrnwngzn3kdzw5hydlzf03qdgm2hdq27cqv3agm2awhz5se903vruatfhq77w3ls4evs3ch9zw97j25emudupq63nyw24cg27h2rsp`: signature
	 * * `fj9srp`: Bech32 checksum
	 */
	msatoshi = 2500 * (1000ULL * 100000000) / 1000000;
	b11 = new_bolt11(ctx, &msatoshi);
	b11->chain = chainparams_for_network("bitcoin");
	b11->timestamp = 1496314658;
	if (!hex_decode("0001020304050607080900010203040506070809000102030405060708090102",
			strlen("0001020304050607080900010203040506070809000102030405060708090102"),
			&b11->payment_hash, sizeof(b11->payment_hash)))
		abort();
	b11->receiver_id = node;
	b11->description = "1 cup coffee";
	b11->expiry = 60;

	test_b11("lnbc2500u1pvjluezpp5qqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqypqdq5xysxxatsyp3k7enxv4jsxqzpuaztrnwngzn3kdzw5hydlzf03qdgm2hdq27cqv3agm2awhz5se903vruatfhq77w3ls4evs3ch9zw97j25emudupq63nyw24cg27h2rspfj9srp", b11, NULL);

	/* BOLT #11:
	 *
	 * > ### Now send $24 for an entire list of things (hashed)
	 * > lnbc20m1pvjluezpp5qqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqypqhp58yjmdan79s6qqdhdzgynm4zwqd5d7xmw5fk98klysy043l2ahrqscc6gd6ql3jrc5yzme8v4ntcewwz5cnw92tz0pc8qcuufvq7khhr8wpald05e92xw006sq94mg8v2ndf4sefvf9sygkshp5zfem29trqq2yxxz7
	 *
	 * Breakdown:
	 *
	 * * `lnbc`: prefix, lightning on bitcoin mainnet
	 * * `20m`: amount (20 milli-bitcoin)
	 * * `1`: Bech32 separator
	 * * `pvjluez`: timestamp (1496314658)
	 * * `p`: payment hash...
	 * * `h`: tagged field: hash of description
	 *   * `p5`: `data_length` (`p` = 1, `5` = 20. 1 * 32 + 20 == 52)
	 *   * `8yjmdan79s6qqdhdzgynm4zwqd5d7xmw5fk98klysy043l2ahrqs`: SHA256 of 'One piece of chocolate cake, one icecream cone, one pickle, one slice of swiss cheese, one slice of salami, one lollypop, one piece of cherry pie, one sausage, one cupcake, and one slice of watermelon'
	 * * `cc6gd6ql3jrc5yzme8v4ntcewwz5cnw92tz0pc8qcuufvq7khhr8wpald05e92xw006sq94mg8v2ndf4sefvf9sygkshp5zfem29trqq`: signature
	 * * `2yxxz7`: Bech32 checksum
	 */
	msatoshi = 20 * (1000ULL * 100000000) / 1000;
	b11 = new_bolt11(ctx, &msatoshi);
	b11->chain = chainparams_for_network("bitcoin");
	b11->timestamp = 1496314658;
	if (!hex_decode("0001020304050607080900010203040506070809000102030405060708090102",
			strlen("0001020304050607080900010203040506070809000102030405060708090102"),
			&b11->payment_hash, sizeof(b11->payment_hash)))
		abort();
	b11->receiver_id = node;
	b11->description_hash = tal(b11, struct sha256);
	test_b11("lnbc20m1pvjluezpp5qqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqypqhp58yjmdan79s6qqdhdzgynm4zwqd5d7xmw5fk98klysy043l2ahrqscc6gd6ql3jrc5yzme8v4ntcewwz5cnw92tz0pc8qcuufvq7khhr8wpald05e92xw006sq94mg8v2ndf4sefvf9sygkshp5zfem29trqq2yxxz7", b11, "One piece of chocolate cake, one icecream cone, one pickle, one slice of swiss cheese, one slice of salami, one lollypop, one piece of cherry pie, one sausage, one cupcake, and one slice of watermelon");

	/* FIXME: Test the others! */

	tal_free(ctx);
	return 0;
}