var strs = {}; // shared strings
var _ssfopts = {}; // spreadsheet formatting options

RELS.WS = [
    "http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet",
    "http://purl.oclc.org/ooxml/officeDocument/relationships/worksheet"
];

/*global Map */
var browser_has_Map = typeof Map !== 'undefined';

function get_sst_id(sst /*:SST*/ , str /*:string*/ , rev) /*:number*/ {
    var i = 0,
        len = sst.length;
    if (rev) {
        if (browser_has_Map ? rev.has(str) : rev.hasOwnProperty(str)) {
            var revarr = browser_has_Map ? rev.get(str) : rev[str];
            for (; i < revarr.length; ++i) {
                if (sst[revarr[i]].t === str) {
                    sst.Count++;
                    return revarr[i];
                }
            }
        }
    } else
        for (; i < len; ++i) {
            if (sst[i].t === str) {
                sst.Count++;
                return i;
            }
        }
    sst[len] = ({
        t: str
    } /*:any*/ );
    sst.Count++;
    sst.Unique++;
    if (rev) {
        if (browser_has_Map) {
            if (!rev.has(str)) rev.set(str, []);
            rev.get(str).push(len);
        } else {
            if (!rev.hasOwnProperty(str)) rev[str] = [];
            rev[str].push(len);
        }
    }
    return len;
}

function col_obj_w(C /*:number*/ , col) {
    var p = ({
        min: C + 1,
        max: C + 1
    } /*:any*/ );
    /* wch (chars), wpx (pixels) */
    var wch = -1;
    if (col.MDW) MDW = col.MDW;
    if (col.width != null) p.customWidth = 1;
    else if (col.wpx != null) wch = px2char(col.wpx);
    else if (col.wch != null) wch = col.wch;
    if (wch > -1) {
        p.width = char2width(wch);
        p.customWidth = 1;
    } else if (col.width != null) p.width = col.width;
    if (col.hidden) p.hidden = true;
    return p;
}

function default_margins(margins /*:Margins*/ , mode /*:?string*/ ) {
    if (!margins) return;
    var defs = [0.7, 0.7, 0.75, 0.75, 0.3, 0.3];
    if (mode == 'xlml') defs = [1, 1, 1, 1, 0.5, 0.5];
    if (margins.left == null) margins.left = defs[0];
    if (margins.right == null) margins.right = defs[1];
    if (margins.top == null) margins.top = defs[2];
    if (margins.bottom == null) margins.bottom = defs[3];
    if (margins.header == null) margins.header = defs[4];
    if (margins.footer == null) margins.footer = defs[5];
}

function get_cell_style(styles /*:Array<any>*/ , cell /*:Cell*/ , opts) {
    var z = opts.revssf[cell.z != null ? cell.z : "General"];
    var i = 0x3c,
        result;
    if (z == null && opts.ssf) {
        for (; i < 0x188; ++i)
            if (opts.ssf[i] == null) {
                SSF.load(cell.z, i);
                // $FlowIgnore
                opts.ssf[i] = cell.z;
                opts.revssf[cell.z] = z = i;
                break;
            }
    }
    if (cell.p && !styles.find(s => !!s.applyProtection)) {
        styles[styles.length] = {
            numFmtId: z,
            fontId: 0,
            fillId: 0,
            borderId: 0,
            xfId: 1,
            applyNumberFormat: 1,
            applyProtection: 1
        };
    }
    for (i = 0; i != styles.length; ++i) {
        if (styles[i].numFmtId === z) {
            if (cell.p && !styles[i].applyProtection) {
                continue;
            }
            result = i;
            break;
        }
    }
    if (result == undefined) {
        let length = styles.length;
        styles[length] = {
            numFmtId: z,
            fontId: 0,
            fillId: 0,
            borderId: 0,
            xfId: 0,
            applyNumberFormat: 1
        };
        result = length;
    }
    return result;
}

function safe_format(p /*:Cell*/ , fmtid /*:number*/ , fillid /*:?number*/ , opts, themes, styles) {
    if (p.t === 'z') return;
    if (p.t === 'd' && typeof p.v === 'string') p.v = parseDate(p.v);
    try {
        if (opts.cellNF) p.z = SSF._table[fmtid];
    } catch (e) {
        if (opts.WTF) throw e;
    }
    if (!opts || opts.cellText !== false) try {
        if (SSF._table[fmtid] == null) SSF.load(SSFImplicit[fmtid] || "General", fmtid);
        if (p.t === 'e') p.w = p.w || BErr[p.v];
        else if (fmtid === 0) {
            if (p.t === 'n') {
                if ((p.v | 0) === p.v) p.w = SSF._general_int(p.v);
                else p.w = SSF._general_num(p.v);
            } else if (p.t === 'd') {
                var dd = datenum(p.v);
                if ((dd | 0) === dd) p.w = SSF._general_int(dd);
                else p.w = SSF._general_num(dd);
            } else if (p.v === undefined) return "";
            else p.w = SSF._general(p.v, _ssfopts);
        } else if (p.t === 'd') p.w = SSF.format(fmtid, datenum(p.v), _ssfopts);
        else p.w = SSF.format(fmtid, p.v, _ssfopts);
    } catch (e) {
        if (opts.WTF) throw e;
    }
    if (!opts.cellStyles) return;
    if (fillid != null) try {
        p.s = styles.Fills[fillid];
        if (p.s.fgColor && p.s.fgColor.theme && !p.s.fgColor.rgb) {
            p.s.fgColor.rgb = rgb_tint(themes.themeElements.clrScheme[p.s.fgColor.theme].rgb, p.s.fgColor.tint || 0);
            if (opts.WTF) p.s.fgColor.raw_rgb = themes.themeElements.clrScheme[p.s.fgColor.theme].rgb;
        }
        if (p.s.bgColor && p.s.bgColor.theme) {
            p.s.bgColor.rgb = rgb_tint(themes.themeElements.clrScheme[p.s.bgColor.theme].rgb, p.s.bgColor.tint || 0);
            if (opts.WTF) p.s.bgColor.raw_rgb = themes.themeElements.clrScheme[p.s.bgColor.theme].rgb;
        }
    } catch (e) {
        if (opts.WTF && styles.Fills) throw e;
    }
}

function check_ws(ws /*:Worksheet*/ , sname /*:string*/ , i /*:number*/ ) {
    if (ws && ws['!ref']) {
        var range = safe_decode_range(ws['!ref']);
        if (range.e.c < range.s.c || range.e.r < range.s.r) throw new Error("Bad range (" + i + "): " + ws['!ref']);
    }
}