/*
    Copyright (C) 2016 Fredrik Johansson

    This file is part of Arb.

    Arb is free software: you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License (LGPL) as published
    by the Free Software Foundation; either version 2.1 of the License, or
    (at your option) any later version.  See <http://www.gnu.org/licenses/>.
*/

#include "acb_dirichlet.h"

int main()
{
    slong iter;
    flint_rand_t state;

    flint_printf("l_fmpq....");
    fflush(stdout);

    flint_randinit(state);

    for (iter = 0; iter < 500 * arb_test_multiplier(); iter++)
    {
        fmpq_t x;
        acb_t s, t, u;
        dirichlet_group_t G;
        dirichlet_char_t chi;
        ulong q, k;
        slong prec;

        fmpq_init(x);
        acb_init(s);
        acb_init(t);
        acb_init(u);

        q = 1 + n_randint(state, 50);
        prec = 2 + n_randint(state, 300);
        k = n_randint(state, n_euler_phi(q));

        dirichlet_group_init(G, q);
        dirichlet_char_init(chi, G);
        dirichlet_char_index(chi, G, k);

        fmpq_randtest(x, state, 2 + n_randint(state, 100));
        if (fmpq_get_d(x) < -100.0)
            fmpq_neg(x, x);
        acb_set_fmpq(s, x, prec);

        if (n_randint(state, 2))
            acb_dirichlet_l_hurwitz(t, s, NULL, G, chi, prec);
        else
            acb_dirichlet_l(t, s, G, chi, prec);

        acb_dirichlet_l_fmpq(u, x, G, chi, prec);

        if (!acb_overlaps(t, u))
        {
            flint_printf("FAIL: overlap\n\n");
            flint_printf("iter = %wd  q = %wu  k = %wu  prec = %wd\n\n", iter, q, k, prec);
            flint_printf("x = "); fmpq_print(x); flint_printf("\n\n");
            flint_printf("s = "); acb_printn(s, 100, 0); flint_printf("\n\n");
            flint_printf("t = "); acb_printn(t, 100, 0); flint_printf("\n\n");
            flint_printf("u = "); acb_printn(u, 100, 0); flint_printf("\n\n");
            acb_sub(t, t, u, prec);
            flint_printf("t - u = "); acb_printd(t, 30); flint_printf("\n\n");
            flint_abort();
        }

        dirichlet_char_clear(chi);
        dirichlet_group_clear(G);
        fmpq_clear(x);
        acb_clear(s);
        acb_clear(t);
        acb_clear(u);
    }

    flint_randclear(state);
    flint_cleanup();
    flint_printf("PASS\n");
    return EXIT_SUCCESS;
}
