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#ifndef BOKF_TAX_TABLE_H
#define BOKF_TAX_TABLE_H
#include <sqlite3.h>
#include <stddef.h>
#include <stdint.h>
#include "util.h"
/* One record from Skatteverket's fixed-width allmanna-tabeller-manad.txt.
Income and tax are öre; % records carry percent x100 in pct with
tax_ore 0, B records carry the whole-krona tax x100 in tax_ore. */
struct tax_row {
int table_no;
int column_no;
int64_t income_from_ore;
int64_t income_to_ore; /* < 0 = open-ended top range */
int64_t tax_ore;
int64_t pct;
int is_pct;
};
/* Parses the fixed-width file (UTF-8 BOM tolerated); skips blank lines.
Returns 0 with a malloc'd rows array, -1 with a message otherwise. */
int tax_table_parse(const unsigned char *data, size_t len,
struct tax_row **out, size_t *out_n, char **err);
/* Replaces year's rows and meta. The caller owns the transaction: on failure
the caller rolls the whole thing back. */
int tax_table_store(sqlite3 *db, int year, const struct tax_row *rows,
size_t n, const char *source_url,
const unsigned char sha256[32], const char *fetched_at,
char **err);
/* Looks up the B range containing gross_ore. 0 = found; 1 = gross is above
the tabulated B range; 2 = no B range contains it (or none stored);
-1 = database error. % rows exist in the table but wave 1 refuses to
guess how Skatteverket applies them. */
int tax_table_lookup(sqlite3 *db, int year, int table_no, int column_no,
int64_t gross_ore, int64_t *tax_ore);
/* HTTPS GET with the system trust store, following up to five redirects.
Returns 0 and the body, -1 with a message. */
int tax_table_https_get(const char *url, struct buf *out, char **err);
/* Downloads the official monthly table for year: finds the year's link on
Skatteverket's page in document order (current year first), downloads it
and returns the bytes and the absolute source URL. */
int tax_table_fetch_year(int year, unsigned char **data, size_t *len,
char **source_url, char **err);
#endif
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