/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
#ident "Copyright (c) 2007-2012 Tokutek Inc.  All rights reserved."
#ident "The technology is licensed by the Massachusetts Institute of Technology, Rutgers State University of New Jersey, and the Research Foundation of State University of New York at Stony Brook under United States of America Serial No. 11/760379 and to the patents and/or patent applications resulting from it."

#include "ft-cachetable-wrappers.h"
#include "ft-flusher.h"
#include "ft-internal.h"
#include "ft.h"
#include "fttypes.h"
#include "ule.h"

// dummymsn needed to simulate msn because messages are injected at a lower level than toku_ft_root_put_cmd()
#define MIN_DUMMYMSN ((MSN) {(uint64_t)1 << 62})
static MSN dummymsn;      
static int testsetup_initialized = 0;


// Must be called before any other test_setup_xxx() functions are called.
void
toku_testsetup_initialize(void) {
    if (testsetup_initialized == 0) {
        testsetup_initialized = 1;
        dummymsn = MIN_DUMMYMSN;
    }
}

static MSN
next_dummymsn(void) {
    ++(dummymsn.msn);
    return dummymsn;
}


bool ignore_if_was_already_open;
int toku_testsetup_leaf(FT_HANDLE brt, BLOCKNUM *blocknum, int n_children, char **keys, int *keylens) {
    FTNODE node;
    assert(testsetup_initialized);
    toku_create_new_ftnode(brt, &node, 0, n_children);
    int i;
    for (i=0; i<n_children; i++) {
        BP_STATE(node,i) = PT_AVAIL;
    }

    for (i=0; i+1<n_children; i++) {
        toku_memdup_dbt(&node->childkeys[i], keys[i], keylens[i]);
        node->totalchildkeylens += keylens[i];
    }

    *blocknum = node->thisnodename;
    toku_unpin_ftnode(brt->ft, node);
    return 0;
}

// Don't bother to clean up carefully if something goes wrong.  (E.g., it's OK to have malloced stuff that hasn't been freed.)
int toku_testsetup_nonleaf (FT_HANDLE brt, int height, BLOCKNUM *blocknum, int n_children, BLOCKNUM *children, char **keys, int *keylens) {
    FTNODE node;
    assert(testsetup_initialized);
    assert(n_children<=FT_FANOUT);
    toku_create_new_ftnode(brt, &node, height, n_children);
    int i;
    for (i=0; i<n_children; i++) {
        BP_BLOCKNUM(node, i) = children[i];
        BP_STATE(node,i) = PT_AVAIL;
    }
    for (i=0; i+1<n_children; i++) {
        toku_memdup_dbt(&node->childkeys[i], keys[i], keylens[i]);
        node->totalchildkeylens += keylens[i];
    }
    *blocknum = node->thisnodename;
    toku_unpin_ftnode(brt->ft, node);
    return 0;
}

int toku_testsetup_root(FT_HANDLE brt, BLOCKNUM blocknum) {
    assert(testsetup_initialized);
    brt->ft->h->root_blocknum = blocknum;
    return 0;
}

int toku_testsetup_get_sersize(FT_HANDLE brt, BLOCKNUM diskoff) // Return the size on disk
{
    assert(testsetup_initialized);
    void *node_v;
    struct ftnode_fetch_extra bfe;
    fill_bfe_for_full_read(&bfe, brt->ft);
    int r  = toku_cachetable_get_and_pin(
        brt->ft->cf, diskoff,
        toku_cachetable_hash(brt->ft->cf, diskoff),
        &node_v,
        NULL,
        get_write_callbacks_for_node(brt->ft),
        toku_ftnode_fetch_callback,
        toku_ftnode_pf_req_callback,
        toku_ftnode_pf_callback,
        true,
        &bfe
        );
    assert(r==0);
    FTNODE CAST_FROM_VOIDP(node, node_v);
    int size = toku_serialize_ftnode_size(node);
    toku_unpin_ftnode(brt->ft, node);
    return size;
}

int toku_testsetup_insert_to_leaf (FT_HANDLE brt, BLOCKNUM blocknum, const char *key, int keylen, const char *val, int vallen) {
    void *node_v;
    int r;

    assert(testsetup_initialized);

    struct ftnode_fetch_extra bfe;
    fill_bfe_for_full_read(&bfe, brt->ft);
    r = toku_cachetable_get_and_pin(
        brt->ft->cf,
        blocknum,
        toku_cachetable_hash(brt->ft->cf, blocknum),
        &node_v,
        NULL,
        get_write_callbacks_for_node(brt->ft),
	toku_ftnode_fetch_callback,
        toku_ftnode_pf_req_callback,
        toku_ftnode_pf_callback,
        true,
	&bfe
	);
    if (r!=0) return r;
    FTNODE CAST_FROM_VOIDP(node, node_v);
    toku_verify_or_set_counts(node);
    assert(node->height==0);

    DBT keydbt,valdbt;
    MSN msn = next_dummymsn();
    FT_MSG_S cmd = { FT_INSERT, msn, xids_get_root_xids(),
                     .u = { .id = { toku_fill_dbt(&keydbt, key, keylen),
                                    toku_fill_dbt(&valdbt, val, vallen) } } };

    static size_t zero_flow_deltas[] = { 0, 0 };
    toku_ft_node_put_cmd (
        brt->ft->compare_fun,
        brt->ft->update_fun,
        &brt->ft->cmp_descriptor,
        node,
        -1,
        &cmd,
        true,
        make_gc_info(true),
        zero_flow_deltas,
        NULL
        );

    toku_verify_or_set_counts(node);

    toku_unpin_ftnode(brt->ft, node);
    return 0;
}

static int
testhelper_string_key_cmp(DB *UU(e), const DBT *a, const DBT *b)
{
    char *CAST_FROM_VOIDP(s, a->data), *CAST_FROM_VOIDP(t, b->data);
    return strcmp(s, t);
}


void
toku_pin_node_with_min_bfe(FTNODE* node, BLOCKNUM b, FT_HANDLE t)
{
    struct ftnode_fetch_extra bfe;
    fill_bfe_for_min_read(&bfe, t->ft);
    toku_pin_ftnode_off_client_thread(
        t->ft, 
        b,
        toku_cachetable_hash(t->ft->cf, b),
        &bfe,
        PL_WRITE_EXPENSIVE,
        0,
        NULL,
        node
        );
}

int toku_testsetup_insert_to_nonleaf (FT_HANDLE brt, BLOCKNUM blocknum, enum ft_msg_type cmdtype, const char *key, int keylen, const char *val, int vallen) {
    void *node_v;
    int r;

    assert(testsetup_initialized);

    struct ftnode_fetch_extra bfe;
    fill_bfe_for_full_read(&bfe, brt->ft);
    r = toku_cachetable_get_and_pin(
        brt->ft->cf,
        blocknum,
        toku_cachetable_hash(brt->ft->cf, blocknum),
        &node_v,
        NULL,
        get_write_callbacks_for_node(brt->ft),
	toku_ftnode_fetch_callback,
        toku_ftnode_pf_req_callback,
        toku_ftnode_pf_callback,
        true,
	&bfe
        );
    if (r!=0) return r;
    FTNODE CAST_FROM_VOIDP(node, node_v);
    assert(node->height>0);

    DBT k;
    int childnum = toku_ftnode_which_child(node,
                                            toku_fill_dbt(&k, key, keylen),
                                            &brt->ft->cmp_descriptor, brt->ft->compare_fun);

    XIDS xids_0 = xids_get_root_xids();
    MSN msn = next_dummymsn();
    toku_bnc_insert_msg(BNC(node, childnum), key, keylen, val, vallen, cmdtype, msn, xids_0, true, NULL, testhelper_string_key_cmp);
    // Hack to get the test working. The problem is that this test
    // is directly queueing something in a FIFO instead of 
    // using brt APIs.
    node->max_msn_applied_to_node_on_disk = msn;
    node->dirty = 1;
    // Also hack max_msn_in_ft
    brt->ft->h->max_msn_in_ft = msn;

    toku_unpin_ftnode(brt->ft, node);
    return 0;
}
