# 2023 April 30
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
#

source [file join [file dirname [info script]] fts5_common.tcl]
set testprefix fts5corrupt7

# If SQLITE_ENABLE_FTS5 is defined, omit this file.
ifcapable !fts5 {
  finish_test
  return
}
sqlite3_fts5_may_be_corrupt 1

do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE t1 USING fts5(x);
  INSERT INTO t1(t1, rank) VALUES('pgsz', 32);
}

set doc [string repeat "a b " 30]

do_execsql_test 1.1 {
  BEGIN;
    INSERT INTO t1(rowid, x) VALUES(123, $doc);
    INSERT INTO t1(rowid, x) VALUES(124, $doc);
  COMMIT;
}

execsql_pp {
  SELECT id, fts5_decode(id, block), quote(block) FROM t1_data
}

set rows [db eval { SELECT rowid FROM t1_data }]
db_save_and_close

foreach r $rows {
  db_restore_and_reopen

  proc edit_block {b} {
    binary scan $b c* in
    set out [lreplace $in 0 1 255 255]
    binary format c* $out
  }
  db func edit_block edit_block

  do_execsql_test 1.2.$r.1 {
    UPDATE t1_data SET block = edit_block(block) WHERE rowid=$r;
  }

  do_execsql_test 1.2.$r.2 {
    INSERT INTO t1(t1, rank) VALUES('secure-delete', 1);
  }

  do_test 1.2.$r.3 {
    catchsql { DELETE FROM t1 WHERE rowid=123; }
    catchsql { DELETE FROM t1 WHERE rowid=124; }
    set {} {}
  } {}

  db close
}

foreach r $rows {
set r 137438953475
  db_restore_and_reopen

  proc edit_block {b} {
    binary scan $b c* in
    set out [lreplace $in end end 127]
    binary format c* $out
  }
  db func edit_block edit_block

  do_execsql_test 1.2.$r.1 {
    UPDATE t1_data SET block = edit_block(block) WHERE rowid=$r;
  }

  do_execsql_test 1.2.$r.2 {
    INSERT INTO t1(t1, rank) VALUES('secure-delete', 1);
  }

  do_test 1.2.$r.3 {
    catchsql { DELETE FROM t1 WHERE rowid=124; }
    catchsql { DELETE FROM t1 WHERE rowid=123; }
    set {} {}
  } {}

  db close
}

finish_test