#include <dirent.h>
#include <errno.h>
#include <locale.h>
#include <math.h>
#include <ncursesw/ncurses.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include "client.h"
#include "tui.h"
#include "formula.h"
#include "util.h"
#include "version.h"
#include "yyjson.h"
#include "ui.h"

struct vdctx {
    struct app *a;
    int64_t id;
    size_t natts;
    const char *resp;
    int corrected;
    int want_refresh;
    int posted_new;
    int64_t posted_id;
};

static int vd_key(void *ud, int ch)
{
    struct vdctx *ctx = ud;
    struct app *a = ctx->a;
    if (ch == TUI_KEY_CTRL_N) {
        int64_t nid = vouchers_new(a);
        if (nid > 0) {
            ctx->posted_id = nid;
            ctx->posted_new = 1;
            return TUI_HOOK_BACK;
        }
        return TUI_HOOK_STAY;
    }
    if (ch == 'c') {
        char reasonbuf[512];
        char *reason =
            tui_prompt_into(reasonbuf, sizeof reasonbuf, "Beskriv rättelsen: ",
                            "", 0)
                ? reasonbuf
                : NULL;
        if (reason && *reason) {
            yyjson_mut_doc *d = yyjson_mut_doc_new(NULL);
            yyjson_mut_val *o = yyjson_mut_obj(d);
            yyjson_mut_doc_set_root(d, o);
            yyjson_mut_obj_add_int(d, o, "voucher", ctx->id);
            yyjson_mut_obj_add_strcpy(d, o, "description", reason);
            char *ref = util_random_id("tui-", 8);
            yyjson_mut_obj_add_strcpy(d, o, "client_ref", ref);
            char *cargs = yyjson_mut_write(d, 0, NULL);
            yyjson_mut_doc_free(d);
            char *r = client_rpc(&a->conn, "voucher.correct", a->session,
                                 a->org, cargs);
            if (r && client_ok(r)) {
                int64_t new_id = jint_val(r, "result.id", 0);
                tui_message("Rättat", "Ändringsverifikat %lld skapat",
                            (long long)new_id);
                ctx->corrected = 1;
            } else {
                show_error("Kunde inte rätta", r);
            }
            free(r);
            free(cargs);
            free(ref);
        }
        return TUI_HOOK_BACK;
    }
    if (ch == 6) { /* ^F: attach a file to this voucher */
        char *path = file_browser(a, a->attachment_dir);
        if (path) {
            struct stat sb;
            if (stat(path, &sb) == 0 &&
                (long)sb.st_size > a->max_attachment_bytes) {
                tui_message("Bilaga", "Filen är %.1f MB, max %ld MB.",
                            (double)sb.st_size / (1024 * 1024),
                            a->max_attachment_bytes / (1024 * 1024));
                free(path);
            } else {
                char *b64 = read_file_b64(path);
                if (!b64) {
                    tui_message("Fel", "Kunde inte läsa %s", path);
                    free(path);
                } else {
                    const char *base = strrchr(path, '/');
                    base = base ? base + 1 : path;
                    yyjson_mut_doc *d = yyjson_mut_doc_new(NULL);
                    yyjson_mut_val *o = yyjson_mut_obj(d);
                    yyjson_mut_doc_set_root(d, o);
                    yyjson_mut_obj_add_strcpy(d, o, "filename", base);
                    yyjson_mut_obj_add_strcpy(d, o, "content_base64", b64);
                    yyjson_mut_obj_add_int(d, o, "voucher_id", ctx->id);
                    char *fargs = yyjson_mut_write(d, 0, NULL);
                    yyjson_mut_doc_free(d);
                    free(b64);
                    free(path);
                    char *r = client_rpc(&a->conn, "attachment.put", a->session,
                                         a->org, fargs);
                    if (r && client_ok(r))
                        tui_message("Underlag", "Bifogat.");
                    else
                        show_error("Kunde inte bifoga", r);
                    free(r);
                    free(fargs);
                    ctx->want_refresh = 1;
                    return TUI_HOOK_BACK;
                }
            }
        }
        return TUI_HOOK_STAY;
    }
    if (ch == 'f' && ctx->natts > 0) {
        char **alines = xcalloc(ctx->natts, sizeof(char *));
        int64_t *aids = xcalloc(ctx->natts, sizeof(int64_t));
        for (size_t i = 0; i < ctx->natts; i++) {
            char path[64];
            snprintf(path, sizeof path, "result.attachments.%zu.id", i);
            aids[i] = jint_val(ctx->resp, path, 0);
            snprintf(path, sizeof path, "result.attachments.%zu.filename", i);
            char *fn = jstr_dup(ctx->resp, path);
            alines[i] = xstrdup(fn ? fn : "(namnlös)");
            free(fn);
        }
        int acursor = 0;
        int asel = tui_select_list("Underlag", alines, (int)ctx->natts, 0, 0,
                                   &acursor, 0, "ta bort", 0);
        if (asel >= 0) {
            attachment_download(a, aids[asel]);
        } else if (asel == -6 && acursor >= 0 &&
                   (size_t)acursor < ctx->natts) {
            char q[320];
            snprintf(q, sizeof q, "Ta bort '%s' från verifikatet? (j/n): ",
                     alines[acursor]);
            char ansbuf[512];
            char *ans = tui_prompt_into(ansbuf, sizeof ansbuf, q, "n", 0)
                            ? ansbuf
                            : NULL;
            if (ans && (ans[0] == 'j' || ans[0] == 'J')) {
                char uargs[64];
                snprintf(uargs, sizeof uargs, "{\"id\":%lld,\"voucher_id\":%lld}",
                         (long long)aids[acursor], (long long)ctx->id);
                char *r = client_rpc(&a->conn, "attachment.unlink", a->session,
                                     a->org, uargs);
                if (r && client_ok(r)) {
                    tui_message("Underlag", "Länken borttagen.");
                    ctx->want_refresh = 1;
                    for (size_t i = 0; i < ctx->natts; i++)
                        free(alines[i]);
                    free(alines);
                    free(aids);
                    return TUI_HOOK_REFRESH;
                }
                show_error("Kunde inte ta bort", r);
                free(r);
            }
        }
        for (size_t i = 0; i < ctx->natts; i++)
            free(alines[i]);
        free(alines);
        free(aids);
        return TUI_HOOK_STAY;
    }
    return TUI_HOOK_NONE;
}

static int voucher_detail(struct app *a, int64_t id, int64_t *out_new)
{
    if (out_new)
        *out_new = 0;
    char args[64];
    snprintf(args, sizeof args, "{\"id\":%lld}", (long long)id);
    for (;;) {
        char *resp =
            client_rpc(&a->conn, "voucher.get", a->session, a->org, args);
        if (!resp || !client_ok(resp)) {
            show_error("Verifikat", resp);
            free(resp);
            return 0;
        }
        struct buf text;
        buf_init(&text);
        char *series = jstr_dup(resp, "result.series");
        char *date = jstr_dup(resp, "result.date");
        char *desc = jstr_dup(resp, "result.description");
        char *hash = jstr_dup(resp, "result.hash");
        int64_t number = jint_val(resp, "result.number", 0);
        char line[1024];
        snprintf(line, sizeof line, "%s%lld   %s   %s\n\n",
                 series ? series : "", (long long)number, date ? date : "",
                 desc ? desc : "");
        buf_append(&text, line, strlen(line));
        int hdr = snprintf(
            line, sizeof line, MK_HEAD "  %-6s %-34s D %12s  K %12s\n",
            "Konto", "Benämning", "Debet", "Kredit");
        buf_append(&text, line, (size_t)hdr);
        size_t nrows = jarr_size(resp, "result.rows");
        for (size_t i = 0; i < nrows; i++) {
            char path[64];
            snprintf(path, sizeof path, "result.rows.%zu.account", i);
            char *acc = jstr_dup(resp, path);
            snprintf(path, sizeof path, "result.rows.%zu.name", i);
            char *name = jstr_dup(resp, path);
            snprintf(path, sizeof path, "result.rows.%zu.debit_ore", i);
            int64_t debit = jint_val(resp, path, 0);
            snprintf(path, sizeof path, "result.rows.%zu.credit_ore", i);
            int64_t credit = jint_val(resp, path, 0);
            char d[32], c[32];
            tui_kr_format(debit, d, sizeof d);
            tui_kr_format(credit, c, sizeof c);
            char acol[32], ncol[256];
            snprintf(acol, sizeof acol, "%s", acc ? acc : "");
            tui_pad_field(acol, sizeof acol, 6);
            snprintf(ncol, sizeof ncol, "%s", name ? name : "");
            tui_pad_field(ncol, sizeof ncol, 34);
            snprintf(line, sizeof line, "  %s %s D %12s  K %12s\n", acol,
                     ncol, d, c);
            buf_append(&text, line, strlen(line));
            free(acc);
            free(name);
        }
        size_t natts = jarr_size(resp, "result.attachments");
        if (natts) {
            buf_append(&text, "\n", 1);
            line[0] = MK_RULE[0];
            for (int i = 1; i <= 98; i++)
                line[i] = '-';
            line[99] = '\n';
            buf_append(&text, line, 100);
            buf_append(&text, MK_HEAD "Underlag:\n", 11);
            for (size_t i = 0; i < natts; i++) {
                char path[64];
                snprintf(path, sizeof path, "result.attachments.%zu.filename",
                         i);
                char *fn = jstr_dup(resp, path);
                snprintf(line, sizeof line, "  %s\n", fn ? fn : "");
                buf_append(&text, line, strlen(line));
                free(fn);
            }
        }
        if (hash) {
            snprintf(line, sizeof line, "\nHash: %s\n", hash);
            buf_append(&text, line, strlen(line));
        }
        int64_t corrects = jint_val(resp, "result.corrects_voucher_id", 0);
        if (corrects) {
            snprintf(line, sizeof line, "Rättar verifikat: %lld\n",
                     (long long)corrects);
            buf_append(&text, line, strlen(line));
        }
        buf_append(&text, "\0", 1);

        struct vdctx ctx;
        memset(&ctx, 0, sizeof ctx);
        ctx.a = a;
        ctx.id = id;
        ctx.natts = natts;
        ctx.resp = resp;
        char hint[256];
        snprintf(hint, sizeof hint,
                 "^N = nytt verifikat   c = rätta   ^F = bifoga%s",
                 natts ? "   f = underlag" : "");
        int want_refresh = 0, corrected = 0;
        int ret = tui_pager_hook("Verifikat", (const char *)text.p, hint, 0,
                                 vd_key, &ctx);
        if (ret == 1)
            want_refresh = 1;
        if (ctx.want_refresh)
            want_refresh = 1;
        corrected = ctx.corrected;
        int posted_new = ctx.posted_new;
        int64_t posted_id = ctx.posted_id;
        free(series);
        free(date);
        free(desc);
        free(hash);
        buf_free(&text);
        free(resp);
        if (posted_new) {
            if (out_new)
                *out_new = posted_id;
            return 2;
        }
        if (want_refresh)
            continue;
        return corrected;
    }
}

struct tui_vrow {
    char account[16];
    char debit[32];
    char credit[32];
    char text[64];
};

struct acct_cache {
    int loaded;
    int64_t org;
    char **numbers;
    char **names;
    size_t n;
};

static struct acct_cache g_accts;

void acct_cache_free(void)
{
    for (size_t i = 0; i < g_accts.n; i++) {
        free(g_accts.numbers[i]);
        free(g_accts.names[i]);
    }
    free(g_accts.numbers);
    free(g_accts.names);
    memset(&g_accts, 0, sizeof g_accts);
}

static void acct_cache_load(struct app *a)
{
    if (g_accts.loaded && g_accts.org == a->org)
        return;
    acct_cache_free();
    char *resp = client_rpc(&a->conn, "account.list", a->session, a->org,
                            "{\"active_only\":true}");
    if (!resp || !client_ok(resp)) {
        free(resp);
        return;
    }
    size_t n = jarr_size(resp, "result.items");
    g_accts.numbers = xcalloc(n ? n : 1, sizeof(char *));
    g_accts.names = xcalloc(n ? n : 1, sizeof(char *));
    for (size_t i = 0; i < n; i++) {
        char path[64];
        snprintf(path, sizeof path, "result.items.%zu.number", i);
        char *number = jstr_dup(resp, path);
        snprintf(path, sizeof path, "result.items.%zu.name", i);
        char *name = jstr_dup(resp, path);
        g_accts.numbers[i] = number ? number : xstrdup("");
        g_accts.names[i] = name ? name : xstrdup("");
    }
    g_accts.n = n;
    g_accts.org = a->org;
    g_accts.loaded = 1;
    free(resp);
}

const char *acct_name(struct app *a, const char *number)
{
    if (!number || !*number)
        return NULL;
    acct_cache_load(a);
    for (size_t i = 0; i < g_accts.n; i++)
        if (strcmp(g_accts.numbers[i], number) == 0)
            return g_accts.names[i];
    return NULL;
}

int acct_exists(struct app *a, const char *number)
{
    if (!number || !*number)
        return 0;
    acct_cache_load(a);
    for (size_t i = 0; i < g_accts.n; i++)
        if (strcmp(g_accts.numbers[i], number) == 0)
            return 1;
    return 0;
}


struct vform {
    struct app *a;
    struct tui_rt rt;
    struct tui_vrow rows[64];
    int64_t att_ids[32];
    char att_names[32][80];
    int natt;
    char date[16];
    char series[16];
    char desc[256];
    char client_ref[64];
};

static void vform_cell(void *ud, int row, int col, char **buf, size_t *cap)
{
    struct vform *vf = ud;
    struct tui_vrow *r = &vf->rows[row];
    if (col == 0) {
        *buf = r->account;
        *cap = sizeof r->account;
    } else if (col == 2) {
        *buf = r->debit;
        *cap = sizeof r->debit;
    } else if (col == 3) {
        *buf = r->credit;
        *cap = sizeof r->credit;
    } else {
        *buf = r->text;
        *cap = sizeof r->text;
    }
}

static void vform_info(void *ud, int row, char *buf, size_t n)
{
    struct vform *vf = ud;
    const char *nm = acct_name(vf->a, vf->rows[row].account);
    snprintf(buf, n, "%s", nm ? nm : "");
}

static void vform_footer(void *ud, char *buf, size_t n)
{
    struct vform *vf = ud;
    int64_t sum_d = 0, sum_c = 0;
    for (int i = 0; i < vf->rt.nrows; i++) {
        int64_t v;
        if (tui_parse_kr(vf->rows[i].debit, &v) == 0)
            sum_d += v;
        if (tui_parse_kr(vf->rows[i].credit, &v) == 0)
            sum_c += v;
    }
    char d1[32], c1[32], diff[32], line[1024];
    tui_kr_format(sum_d, d1, sizeof d1);
    tui_kr_format(sum_c, c1, sizeof c1);
    tui_kr_format(sum_d - sum_c, diff, sizeof diff);
    int balanced = sum_d == sum_c;
    struct buf t;
    buf_init(&t);
    if (vf->natt > 0) {
        snprintf(line, sizeof line, "Bilagor: ");
        for (int i = 0; i < vf->natt; i++) {
            size_t used = strlen(line);
            if (used + 1 >= sizeof line)
                break;
            snprintf(line + used, sizeof line - used, "%.79s%s",
                     vf->att_names[i], i + 1 < vf->natt ? ", " : "");
        }
        buf_append(&t, line, strlen(line));
        buf_append(&t, "\n", 1);
    }
    snprintf(line, sizeof line, "Summa debet %12s   kredit %12s   %s", d1, c1,
             balanced ? "I BALANS" : "DIFF");
    buf_append(&t, line, strlen(line));
    if (!balanced) {
        snprintf(line, sizeof line, "\nDifferens: %s", diff);
        buf_append(&t, line, strlen(line));
    }
    buf_append(&t, "\0", 1);
    snprintf(buf, n, "%s", (char *)t.p);
    buf_free(&t);
}

static void vform_attach(struct vform *vf)
{
    struct app *a = vf->a;
    char *path = file_browser(a, a->attachment_dir);
    if (!path)
        return;
    struct stat sb;
    if (stat(path, &sb) == 0 &&
        (long)sb.st_size > a->max_attachment_bytes) {
        tui_message("Bilaga", "Filen är %.1f MB, max %ld MB.",
                    (double)sb.st_size / (1024 * 1024),
                    a->max_attachment_bytes / (1024 * 1024));
        free(path);
        return;
    }
    char *b64 = read_file_b64(path);
    if (!b64) {
        tui_message("Bilaga", "Kunde inte läsa %s", path);
        free(path);
        return;
    }
    if (vf->natt >= 32) {
        tui_message("Bilaga", "Max 32 bilagor per verifikat.");
        free(b64);
        free(path);
        return;
    }
    const char *base = strrchr(path, '/');
    base = base ? base + 1 : path;
    yyjson_mut_doc *d = yyjson_mut_doc_new(NULL);
    yyjson_mut_val *o = yyjson_mut_obj(d);
    yyjson_mut_doc_set_root(d, o);
    yyjson_mut_obj_add_strcpy(d, o, "filename", base);
    yyjson_mut_obj_add_strcpy(d, o, "content_base64", b64);
    char *args = yyjson_mut_write(d, 0, NULL);
    yyjson_mut_doc_free(d);
    size_t need = strlen(args) + 256;
    char *raw = xmalloc(need);
    snprintf(raw, need,
             "{\"v\":1,\"id\":\"tui\",\"cmd\":\"attachment.put\","
             "\"session\":\"%s\",\"org\":%lld,\"args\":%s}",
             a->session, (long long)a->org, args);
    free(args);
    char *r = NULL;
    if (client_send_line(&a->conn, raw) == 0)
        r = client_read_line(&a->conn);
    free(raw);
    if (r && client_ok(r)) {
        vf->att_ids[vf->natt] = jint_val(r, "result.id", 0);
        snprintf(vf->att_names[vf->natt], sizeof vf->att_names[vf->natt],
                 "%s", base);
        vf->natt++;
    } else {
        show_error("Kunde inte bifoga filen", r);
    }
    free(r);
    free(b64);
    free(path);
}

static void vform_template(struct vform *vf)
{
    struct app *a = vf->a;
    char *lresp = client_rpc(&a->conn, "template.list", a->session, a->org,
                             "{\"active_only\":true}");
    if (!lresp || !client_ok(lresp)) {
        show_error("Mallar", lresp);
        free(lresp);
        return;
    }
    size_t ln = jarr_size(lresp, "result.items");
    if (ln == 0) {
        tui_message("Mallar",
                    "Inga mallar ännu. Skapa en under Mallar först.");
        free(lresp);
        return;
    }
    char **names = xcalloc(ln, sizeof(char *));
    char **lines = xcalloc(ln, sizeof(char *));
    for (size_t i = 0; i < ln; i++) {
        char path[64], line[512];
        snprintf(path, sizeof path, "result.items.%zu.name", i);
        char *nm = jstr_dup(lresp, path);
        snprintf(path, sizeof path, "result.items.%zu.series", i);
        char *ser = jstr_dup(lresp, path);
        snprintf(path, sizeof path, "result.items.%zu.row_count", i);
        int64_t rc = jint_val(lresp, path, 0);
        snprintf(path, sizeof path, "result.items.%zu.description", i);
        char *ds = jstr_dup(lresp, path);
        char nmbuf[128];
        snprintf(nmbuf, sizeof nmbuf, "%s", nm ? nm : "");
        tui_pad_field(nmbuf, sizeof nmbuf, 24);
        snprintf(line, sizeof line, "%s %-3s %2lld rader  %s", nmbuf,
                 ser ? ser : "", (long long)rc, ds ? ds : "");
        names[i] = xstrdup(nm ? nm : "");
        lines[i] = xstrdup(line);
        free(nm);
        free(ser);
        free(ds);
    }
    int tsel = tui_select_list("Välj mall", lines, (int)ln, 0, 1, NULL, 0,
                               NULL, 0);
    char tname[128] = "";
    if (tsel >= 0)
        snprintf(tname, sizeof tname, "%s", names[tsel]);
    for (size_t i = 0; i < ln; i++) {
        free(names[i]);
        free(lines[i]);
    }
    free(names);
    free(lines);
    free(lresp);
    if (tsel < 0)
        return;
    yyjson_mut_doc *d = yyjson_mut_doc_new(NULL);
    yyjson_mut_val *to = yyjson_mut_obj(d);
    yyjson_mut_doc_set_root(d, to);
    yyjson_mut_obj_add_strcpy(d, to, "name", tname);
    char *targs = yyjson_mut_write(d, 0, NULL);
    yyjson_mut_doc_free(d);
    char *resp =
        client_rpc(&a->conn, "template.get", a->session, a->org, targs);
    free(targs);
    if (!resp || !client_ok(resp)) {
        show_error("Mall", resp);
        free(resp);
        return;
    }
    char xsbuf[512];
    char *xs = tui_prompt_into(xsbuf, sizeof xsbuf, "Belopp (x, kr): ", "",
                               0)
                   ? xsbuf
                   : NULL;
    double xv = 0;
    if (xs && *xs && !parse_x_double(xs, &xv)) {
        tui_message("Fel", "Ogiltigt belopp.");
        free(resp);
        return;
    }
    size_t n = jarr_size(resp, "result.rows");
    char **accts = xcalloc(n ? n : 1, sizeof(char *));
    char **forms = xcalloc(n ? n : 1, sizeof(char *));
    char **descs = xcalloc(n ? n : 1, sizeof(char *));
    struct template_row *in = xcalloc(n ? n : 1, sizeof *in);
    for (size_t i = 0; i < n; i++) {
        char path[64];
        snprintf(path, sizeof path, "result.rows.%zu.account", i);
        accts[i] = jstr_dup(resp, path);
        snprintf(path, sizeof path, "result.rows.%zu.formula", i);
        forms[i] = jstr_dup(resp, path);
        snprintf(path, sizeof path, "result.rows.%zu.description", i);
        descs[i] = jstr_dup(resp, path);
        in[i].account = accts[i] ? accts[i] : "";
        in[i].formula = forms[i] ? forms[i] : "";
        in[i].description = descs[i] && *descs[i] ? descs[i] : NULL;
    }
    struct resolved_row *out = xcalloc(n ? n : 1, sizeof *out);
    size_t on = 0;
    char ferr[256] = "";
    if (formula_resolve_rows(in, n, xv, out, &on, ferr, sizeof ferr) != 0) {
        tui_message("Mall", "%s",
                    ferr[0] ? ferr : "kunde inte lösa mallen");
    } else {
        memset(vf->rows, 0, sizeof vf->rows);
        int use = (int)(on > 64 ? 64 : on);
        for (int i = 0; i < use; i++) {
            snprintf(vf->rows[i].account, sizeof vf->rows[i].account, "%s",
                     out[i].account);
            char tmp[32];
            if (out[i].debit_ore) {
                tui_kr_format(out[i].debit_ore, tmp, sizeof tmp);
                snprintf(vf->rows[i].debit, sizeof vf->rows[i].debit, "%s",
                         tmp);
            } else {
                tui_kr_format(out[i].credit_ore, tmp, sizeof tmp);
                snprintf(vf->rows[i].credit, sizeof vf->rows[i].credit, "%s",
                         tmp);
            }
            if (out[i].description[0])
                snprintf(vf->rows[i].text, sizeof vf->rows[i].text, "%s",
                         out[i].description);
        }
        vf->rt.nrows = use > 0 ? use : 1;
        char *tds = jstr_dup(resp, "result.description");
        char *tser = jstr_dup(resp, "result.series");
        if (!vf->desc[0] && tds && *tds)
            replace_x_into(tds, xv, vf->desc, sizeof vf->desc);
        if (tser && *tser)
            snprintf(vf->series, sizeof vf->series, "%s", tser);
        free(tds);
        free(tser);
        vf->rt.row = 0;
        vf->rt.col = 0;
        vf->rt.focus = -1;
        vf->rt.fresh = 1;
        vf->rt.pos = (size_t)-1;
        tui_rt_normalize(&vf->rt);
    }
    free(out);
    for (size_t i = 0; i < n; i++) {
        free(accts[i]);
        free(forms[i]);
        free(descs[i]);
    }
    free(accts);
    free(forms);
    free(descs);
    free(in);
    free(resp);
}

/* Returns the posted voucher id, or 0 to stay in the form. */
static int64_t vform_post(struct vform *vf, int dry)
{
    struct app *a = vf->a;
    yyjson_mut_doc *d = yyjson_mut_doc_new(NULL);
    yyjson_mut_val *o = yyjson_mut_obj(d);
    yyjson_mut_doc_set_root(d, o);
    yyjson_mut_obj_add_strcpy(d, o, "date", vf->date);
    yyjson_mut_obj_add_strcpy(d, o, "description", vf->desc);
    yyjson_mut_obj_add_strcpy(d, o, "series", vf->series);
    yyjson_mut_obj_add_strcpy(d, o, "client_ref", vf->client_ref);
    yyjson_mut_val *arr = yyjson_mut_arr(d);
    for (int i = 0; i < vf->rt.nrows; i++) {
        if (!vf->rows[i].account[0])
            continue;
        int64_t dv = 0, cv = 0;
        if (tui_parse_kr(vf->rows[i].debit, &dv) != 0 ||
            tui_parse_kr(vf->rows[i].credit, &cv) != 0) {
            tui_message("Fel", "Ogiltigt belopp på rad %d", i + 1);
            yyjson_mut_doc_free(d);
            return 0;
        }
        yyjson_mut_val *ro = yyjson_mut_arr_add_obj(d, arr);
        yyjson_mut_obj_add_strcpy(d, ro, "account", vf->rows[i].account);
        yyjson_mut_obj_add_int(d, ro, "debit_ore", dv);
        yyjson_mut_obj_add_int(d, ro, "credit_ore", cv);
        if (vf->rows[i].text[0])
            yyjson_mut_obj_add_strcpy(d, ro, "description",
                                      vf->rows[i].text);
    }
    yyjson_mut_obj_add_val(d, o, "rows", arr);
    if (vf->natt > 0) {
        yyjson_mut_val *aa = yyjson_mut_arr(d);
        for (int i = 0; i < vf->natt; i++)
            yyjson_mut_arr_add_int(d, aa, vf->att_ids[i]);
        yyjson_mut_obj_add_val(d, o, "attachment_ids", aa);
    }
    char *args = yyjson_mut_write(d, 0, NULL);
    yyjson_mut_doc_free(d);
    if (dry) {
        char *raw = xmalloc(strlen(args) + 256);
        sprintf(raw,
                "{\"v\":1,\"id\":\"tui\",\"cmd\":\"voucher.post\","
                "\"session\":\"%s\",\"org\":%lld,\"dry_run\":true,"
                "\"args\":%s}",
                a->session, (long long)a->org, args);
        if (client_send_line(&a->conn, raw) == 0) {
            char *r = client_read_line(&a->conn);
            if (r && client_ok(r)) {
                int64_t num = jint_val(r, "result.number", 0);
                tui_message("Validering OK",
                            "Nummer %lld skulle tilldelas.", (long long)num);
            } else {
                show_error("Validering misslyckades", r);
            }
            free(r);
        } else {
            tui_message("Fel", "Kunde inte nå servern");
        }
        free(raw);
    } else {
        char *r = client_rpc(&a->conn, "voucher.post", a->session, a->org,
                             args);
        if (r && client_ok(r)) {
            int64_t id = jint_val(r, "result.id", 0);
            int64_t num = jint_val(r, "result.number", 0);
            char *ser = jstr_dup(r, "result.series");
            int replayed = jbool_val(r, "result.replayed", 0);
            tui_message("Bokfört", "%s%lld (id %lld)%s", ser ? ser : "",
                        (long long)num, (long long)id,
                        replayed ? " — redan bokfört (idempotent)" : "");
            free(ser);
            free(r);
            free(args);
            return id;
        }
        show_error("Kunde inte bokföra", r);
        free(r);
    }
    free(args);
    return 0;
}

static int vform_key(void *ud, int ch)
{
    struct vform *vf = ud;
    if (ch == KEY_F(4)) {
        vform_template(vf);
        return TUI_HOOK_STAY;
    }
    if (ch == 6) {
        vform_attach(vf);
        return TUI_HOOK_STAY;
    }
    return TUI_HOOK_NONE;
}

int64_t vouchers_new(struct app *a)
{
    struct vform vf;
    memset(&vf, 0, sizeof vf);
    vf.a = a;
    snprintf(vf.date, sizeof vf.date, "%s",
             a->fy_start[0] ? a->fy_start : "2026-01-01");
    snprintf(vf.series, sizeof vf.series, "%s", a->default_series);
    char *ref = util_random_id("tui-", 8);
    snprintf(vf.client_ref, sizeof vf.client_ref, "%s", ref);
    free(ref);
    int text_w = COLS - 60;
    if (text_w < 8)
        text_w = 8;
    struct tui_rt_col cols[5] = {
        { "Konto", 2, 6, TUI_RT_EDIT },
        { "Namn", 9, 24, TUI_RT_INFO },
        { "Debet", 34, 11, TUI_RT_EDIT },
        { "Kredit", 46, 11, TUI_RT_EDIT },
        { "Text", 58, text_w, TUI_RT_EDIT },
    };
    tui_rt_init(&vf.rt, 1, 64, 5, cols, 7, vform_cell, vform_info, &vf);
    tui_rt_set_footer(&vf.rt, vform_footer);
    tui_rt_set_key(&vf.rt, vform_key);
    struct tui_form_field ff[3];
    memset(ff, 0, sizeof ff);
    ff[0].label = "Datum";
    ff[0].value = vf.date;
    ff[0].cap = sizeof vf.date;
    ff[0].kind = TUI_F_DATE;
    ff[1].label = "Serie";
    ff[1].value = vf.series;
    ff[1].cap = sizeof vf.series;
    ff[1].kind = TUI_F_TEXT;
    ff[2].label = "Text";
    ff[2].value = vf.desc;
    ff[2].cap = sizeof vf.desc;
    ff[2].kind = TUI_F_TEXT;
    tui_rt_set_fields(&vf.rt, ff, 3);
    const char *hint = "Enter = ändra fält  Tab = byta fält  F4 = mall"
                       "  ^F = bifoga fil  F5 = validera  ^X = rensa rad"
                       "  ^Enter = bokför  Esc = avbryt";
    for (;;) {
        int rr = tui_rt_run("Nytt verifikat", &vf.rt, hint);
        if (rr == -1)
            return 0;
        if (rr == -2) {
            vform_post(&vf, 1);
            continue;
        }
        if (rr == -3) {
            int64_t id = vform_post(&vf, 0);
            if (id > 0)
                return id;
        }
    }
}

void vouchers_screen(struct app *a)
{
    char **items = NULL;
    int64_t *ids = NULL;
    size_t n = 0;
    int fetch = 1;
    for (;;) {
        if (g_quit) {
            for (size_t i = 0; i < n; i++)
                free(items[i]);
            free(items);
            free(ids);
            return;
        }
        if (fetch) {
            for (size_t i = 0; i < n; i++)
                free(items[i]);
            free(items);
            free(ids);
            items = NULL;
            ids = NULL;
            n = 0;
            fetch = 0;
            char largs[96];
            snprintf(largs, sizeof largs,
                     "{\"limit\":200,\"fiscal_year\":%lld}",
                     (long long)a->fy);
            char *resp = client_rpc(&a->conn, "voucher.list", a->session, a->org,
                                    largs);
            if (!resp || !client_ok(resp)) {
                show_error("Verifikat", resp);
                free(resp);
                return;
            }
            n = jarr_size(resp, "result.items");
            items = xcalloc(n + 1, sizeof(char *));
            ids = xcalloc(n ? n : 1, sizeof(int64_t));
            char **idstr = xcalloc(n ? n : 1, sizeof(char *));
            int idw = 4;
            for (size_t i = 0; i < n; i++) {
                char path[64];
                snprintf(path, sizeof path, "result.items.%zu.id", i);
                ids[i] = jint_val(resp, path, 0);
                snprintf(path, sizeof path, "result.items.%zu.series", i);
                char *ser = jstr_dup(resp, path);
                snprintf(path, sizeof path, "result.items.%zu.number", i);
                int64_t number = jint_val(resp, path, 0);
                char idbuf[32];
                snprintf(idbuf, sizeof idbuf, "%s%lld", ser ? ser : "",
                         (long long)number);
                idstr[i] = xstrdup(idbuf);
                int l = (int)strlen(idbuf);
                if (l > idw)
                    idw = l;
                free(ser);
            }
            for (size_t i = 0; i < n; i++) {
                char path[64], line[512];
                snprintf(path, sizeof path, "result.items.%zu.date", i);
                char *date = jstr_dup(resp, path);
                snprintf(path, sizeof path, "result.items.%zu.description", i);
                char *desc = jstr_dup(resp, path);
                snprintf(path, sizeof path, "result.items.%zu.attachment_count",
                         i);
                int atts = (int)jint_val(resp, path, 0);
                snprintf(line, sizeof line, "  %c   %-*s   %s   %s",
                         atts ? 'x' : ' ', idw, idstr[i], date ? date : "",
                         desc ? desc : "");
                items[i] = xstrdup(line);
                free(date);
                free(desc);
                free(idstr[i]);
            }
            free(idstr);
            free(resp);
            items[n] = xstrdup("+ Nytt verifikat   (^N)");
        }
        size_t total = n + 1;
        int start = 0;
        if (a->voucher_sel) {
            for (size_t i = 0; i < n; i++)
                if (ids[i] == a->voucher_sel) {
                    start = (int)i;
                    break;
                }
        }
        int cur = start;
        int sel = tui_select_list("Verifikat", items, (int)total, start, 1, &cur,
                              1, NULL, 0);
        if (cur >= 0 && (size_t)cur < n)
            a->voucher_sel = ids[cur];
        if (sel == -2) {
            fetch = 1;
            continue;
        }
        int64_t open_id = 0;
        int want_new = (sel == -4);
        if (sel >= 0) {
            if ((size_t)sel == n)
                want_new = 1;
            else if ((size_t)sel < n)
                open_id = ids[sel];
        } else if (sel != -4) {
            for (size_t i = 0; i < n; i++)
                free(items[i]);
            free(items);
            free(ids);
            return;
        }
        if (want_new) {
            open_id = vouchers_new(a);
            if (open_id <= 0)
                continue;
            a->voucher_sel = open_id;
            fetch = 1;
        }
        for (;;) {
            int64_t nv = 0;
            int act = voucher_detail(a, open_id, &nv);
            if (act == 2) {
                open_id = nv;
                a->voucher_sel = nv;
                fetch = 1;
                continue;
            }
            if (act == 1)
                fetch = 1;
            break;
        }
    }
}