#include <imgui.h>
#include <ctime>
#include <string>
#include <vector>

#include "../misc.h"
#include "../logcat_entry.h"
#include "../logcat_thread.h"
#include "main.h"

static inline void render_table(ImFont* monospace_font, std::vector<LogcatEntry>& logcat_entries, std::vector<size_t>& filtered_logcat_entry_offsets) {
    ImGui::TableSetupScrollFreeze(0, 1);
    ImGui::TableSetupColumn("Time", ImGuiTableColumnFlags_None);
    ImGui::TableSetupColumn("User", ImGuiTableColumnFlags_None);
    ImGui::TableSetupColumn("PID", ImGuiTableColumnFlags_None);
    ImGui::TableSetupColumn("TID", ImGuiTableColumnFlags_None);
    ImGui::TableSetupColumn("Buffer", ImGuiTableColumnFlags_None);
    ImGui::TableSetupColumn("Priority", ImGuiTableColumnFlags_None);
    ImGui::TableSetupColumn("Tag", ImGuiTableColumnFlags_None);
    ImGui::TableSetupColumn("Message", ImGuiTableColumnFlags_None);
    ImGui::TableHeadersRow();

    ImGui::PushFont(monospace_font);

    ImGuiListClipper clipper;
    clipper.Begin(static_cast<int>(filtered_logcat_entry_offsets.size()));
    while (clipper.Step()) {
        for (int i = clipper.DisplayStart; i < clipper.DisplayEnd; i++) {
            const LogcatEntry* logcat_entry = &logcat_entries[filtered_logcat_entry_offsets[static_cast<size_t>(i)]];
            struct tm tm;
            char time_as_str[128] = {0};
            strftime(time_as_str, 127 * sizeof(char), "%c", localtime_r(&logcat_entry->time, &tm));

            ImGui::TableNextRow();
            if (ImGui::TableSetColumnIndex(0)) ImGui::TextUnformatted(time_as_str);
            if (logcat_entry->user && ImGui::TableSetColumnIndex(1)) {
                ImGui::TextUnformatted(*logcat_entry->user);
            }
            if (ImGui::TableSetColumnIndex(2)) ImGui::Text("%zu", logcat_entry->pid);
            if (ImGui::TableSetColumnIndex(3)) ImGui::Text("%zu", logcat_entry->tid);
            if (ImGui::TableSetColumnIndex(4)) ImGui::TextUnformatted(buffer_to(logcat_entry->buffer));
            if (ImGui::TableSetColumnIndex(5)) ImGui::TextUnformatted(priority_to(logcat_entry->priority));
            if (ImGui::TableSetColumnIndex(6)) ImGui::TextUnformatted(logcat_entry->tag);
            if (ImGui::TableSetColumnIndex(7)) ImGui::TextUnformatted(logcat_entry->message);
        }
    }
    clipper.End();

    ImGui::PopFont();
    if (ImGui::GetScrollY() >= ImGui::GetScrollMaxY()) {
        ImGui::SetScrollHereY(1.0f);
    }

    ImGui::EndTable();
}

void main_window(bool latest_log_entries_read, ImFont* monospace_font, LogcatThread& logcat_thread,
        std::vector<LogcatEntry>& logcat_entries, std::vector<size_t>& filtered_logcat_entry_offsets,
        const Config& __restrict active_config, Config& __restrict inactive_config,
        bool* __restrict show_settings_window, bool* __restrict show_filters_window, bool* __restrict show_exclusions_window, bool* __restrict show_logs_window) {

    ImGui::SetNextWindowPos(ImGui::GetMainViewport()->WorkPos);
    ImGui::SetNextWindowSize(ImGui::GetMainViewport()->WorkSize);
    if (!ImGui::BeginWithCloseShortcut("LogMeow", nullptr,
            ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoBringToFrontOnFocus)) {
        ImGui::End();
        return;
    }

    if (ImGui::Button("Settings") && !*show_settings_window) {
        inactive_config.logcat_command = active_config.logcat_command;
        inactive_config.normal_font_size = active_config.normal_font_size;
        inactive_config.monospace_font_size = active_config.monospace_font_size;
        *show_settings_window = true;
    }
    ImGui::SameLine();
    if (ImGui::Button("Filters") && !*show_filters_window) {
        copy_filters(inactive_config.filters, active_config.filters);
        *show_filters_window = true;
    }
    ImGui::SameLine();
    if (ImGui::Button("Exclusions") && !*show_exclusions_window) {
        copy_filters(inactive_config.exclusions, active_config.exclusions);
        *show_exclusions_window = true;
    }
    ImGui::SameLine();
    bool open_logs = latest_log_entries_read ? ImGui::Button("Logs") : ImGui::RedButton("Logs");
    if (open_logs) {
        *show_logs_window = true;
    }

    bool can_send_logcat_request = logcat_thread.logcat_process_request.load() == LogcatProcessRequest::None;
    bool logcat_running = logcat_thread.logcat_process_running.test();
    ImGui::AlignTextToFramePadding();
    ImGui::TextUnformatted("Logcat:");
    ImGui::SameLine();

    if (!can_send_logcat_request) {
        ImGui::BeginDisabled();
    }

    if (ImGui::Button("Start", !logcat_running)) {
        logcat_entries.clear();
        filtered_logcat_entry_offsets.clear();
        logcat_thread.logcat_process_request.store(LogcatProcessRequest::Start);
    }
    ImGui::SameLine();
    if (ImGui::Button("Stop", logcat_running)) {
        logcat_thread.logcat_process_request.store(LogcatProcessRequest::Stop);
    }
    ImGui::SameLine();
    if (ImGui::Button("Restart", logcat_running)) {
        logcat_entries.clear();
        filtered_logcat_entry_offsets.clear();
        logcat_thread.logcat_process_request.store(LogcatProcessRequest::Start);
    }

    if (!can_send_logcat_request) {
        ImGui::EndDisabled();
    }

    ImGui::Separator();
    // copied from imgui/imgui_demo.cpp: [SECTION] Example App: Debug Console / ShowExampleAppConsole()
    // and [SECTION] Example App: Long Text / ShowExampleAppLongText()
    // and [SECTION] Example App: Debug Log / ShowExampleAppLog()
    // and Tables/Vertical scrolling, with clipping
    const constexpr ImGuiTableFlags flags = ImGuiTableFlags_ScrollY | ImGuiTableFlags_ScrollX | ImGuiTableFlags_RowBg | ImGuiTableFlags_BordersOuter | ImGuiTableFlags_BordersV | ImGuiTableFlags_Resizable | ImGuiTableFlags_Reorderable | ImGuiTableFlags_Hideable;
    if (ImGui::BeginTable("logcat", 8, flags)) {
        render_table(monospace_font, logcat_entries, filtered_logcat_entry_offsets);
    }
    ImGui::End();
}