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#include "readerview.h"
#include <algorithm>
#include <libbible.h>

using namespace std;

std::vector<libbible::passage> conf;

std::string getCurrMod() {
    auto mods = libbible::getModuleNames();
    std::string currMod = libbible::settingsRead("biblereader::currMod");
    if(std::find(mods.begin(), mods.end(), currMod) == mods.end()) {
        currMod = libbible::settingsRead("module");
        if(std::find(mods.begin(), mods.end(), currMod) == mods.end()) {
            if(! mods.empty()) {
                // New default mod (previous was deleted)
                currMod = *mods.begin();
                libbible::settingsWrite("module", currMod);
                libbible::settingsWrite("biblereader::currMod", currMod);
            } else {
                currMod = std::string();
            }
        }
    }
    return currMod;
}

ReaderView::ReaderView()
    : text()
{
    text.set_editable(false);
    text.set_cursor_visible(false);
    text.set_wrap_mode(Gtk::WrapMode::WRAP_WORD_CHAR);
    auto scroll = new Gtk::ScrolledWindow();
    scroll->add(text);
    add(*scroll);
    // Open the passage we had last time
    setBook(libbible::settingsRead("book"));
    if(libbible::settingsRead("book").empty() || getChapter() == 0) {
        setBook("Genesis");
    }
    refresh();
}

ReaderView::~ReaderView() {}

void ReaderView::setChapter(unsigned int chapter) {
    libbible::settingsWriteInt("chapter", chapter);
}

unsigned int ReaderView::getChapter() {
    if(conf.empty()) return 0;
    return libbible::settingsReadInt("chapter");
}

unsigned int ReaderView::getChapterMax() {
    if(conf.empty()) return 0;
    return conf.back().chapterEnd;
}

void ReaderView::setBook(std::string book) {
    libbible::settingsWrite("book", book);
    conf = libbible::getPassages(getCurrMod(), book);
}

std::string ReaderView::getBook() {
    if(conf.empty()) return "";
    return conf[0].bookShort;
}

std::string ReaderView::getBookFull() {
    if(conf.empty()) return "";
    return conf[0].book;
}

std::vector<std::string> ReaderView::getAllBooks() {
    string currMod = getCurrMod();
    if(currMod.empty()) {
        return vector<string>();
    }
    return libbible::getBooks(currMod);
}

void ReaderView::refresh() {
    auto buf = text.get_buffer();
    buf->set_text(""); // Clear contents

    string currMod = getCurrMod();
    if(currMod.empty()) {
        auto iter = buf->get_iter_at_offset(0);
        iter = buf->insert_markup(iter, "<big><b>No modules installed.</b></big>\n");
        iter = buf->insert_markup(iter, "Please download some modules at:\n");
        iter = buf->insert_markup(iter, "\thttp://crosswire.org/sword/modules/ModDisp.jsp?modType=Bibles\n");
        iter = buf->insert_markup(iter, "Then install them using the menu in the upper right corner, or use the built-in installer to download and install modules.");
        return;
    }

    conf = libbible::getPassages(getCurrMod(), getBook());
    if(getChapter() > conf.size()) {
        setChapter(1);
    }
    auto texts = libbible::getText(conf[getChapter()-1]);

    auto iter = buf->get_iter_at_offset(0);

    auto verseSize = buf->create_tag();
    verseSize->property_size() = libbible::settingsReadInt("fontsize");
    if(verseSize->property_size() == 0) {
        verseSize->property_size() = 12000;
    }

    auto verseScale = buf->create_tag();
    verseScale->property_scale() = 0.8;
    auto titleScale = buf->create_tag();
    titleScale->property_scale() = 1.5;
    titleScale->property_weight() = 600;
    auto verseOffset = buf->create_tag();
    verseOffset->property_rise() = 3000;
    auto indent = buf->create_tag();
    indent->property_left_margin() = 40;
    auto redletter = buf->create_tag();
    redletter->property_foreground_gdk() = Gdk::Color("red");

    int verse = 0;
    string indentString = "    ";
    bool isNewline = true;
    for(auto tex : texts) {
        std::vector<Glib::RefPtr<Gtk::TextBuffer::Tag>> tags = {verseSize};
        bool isParagraph = false;
        bool isIndent = false;
        bool isDivineName = false;
        bool isPreverse = false;
        for(string modifier : tex.modifiers) {
            if(modifier == "paragraph") {
                isParagraph = true;
            } else if (modifier == "line indent0") {
                isIndent = true;
            } else if (modifier == "divineName") {
                isDivineName = true;
            } else if (modifier == "wordsOfJesus") {
                tags.push_back(redletter);
            } else if (modifier == "title") {
                tags.push_back(titleScale);
                // Ensure newline
                if(!tex.text.empty() and tex.text.back() != '\n') {
                    tex.text.push_back('\n');
                }
            } else if (modifier == "preverse") {
                isPreverse = true;
            } else if (modifier == "parallel") {
                // We don't support this (yet)
                tex.text = "";
            }
        }
        if(isIndent) {
            isParagraph = false;
            if(isNewline) {
                tags.push_back(indent);
            }
        }
        if(isParagraph) {
            iter = buf->insert_with_tags(iter, indentString, tags);
        }
        if(tex.verse != verse && ! isPreverse) {
            std::vector<Glib::RefPtr<Gtk::TextBuffer::Tag>> verseTags(tags.begin(), tags.end());
            verseTags.push_back(verseScale);
            verseTags.push_back(verseOffset);
            iter = buf->insert_with_tags(iter, " " + std::to_string(tex.verse), verseTags);
            verse = tex.verse;
        }
        if(isDivineName) {
            // There's no small caps support. Sigh. We do fake small caps instead.
            // Because i lazy, first letter is normal caps and rest small caps, always.
            transform(tex.text.begin(), tex.text.end(), tex.text.begin(), ::toupper);
            iter = buf->insert_with_tags(iter, tex.text.substr(0, 1), tags);
            auto tag = buf->create_tag();
            tag->property_scale() = 0.75;
            tags.push_back(tag);
            iter = buf->insert_with_tags(iter, tex.text.substr(1), tags);
        } else {
            iter = buf->insert_with_tags(iter, tex.text, tags);
        }
        if(!tex.text.empty() and tex.text.back() == '\n') {
            isNewline = true;
        } else {
            isNewline = false;
        }
    }
}