#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <time.h>

#include "ImGuiDatePicker/ImGuiDatePicker.hpp"
//#include "tinyfiledialogs/tinyfiledialogs.h"

#include "strops.hpp"
#include "ui.hpp"
#include "imgui.h"
#include "administration.hpp"
#include "locales.hpp"

void ui_draw_address_form(address* buffer);

static view_state current_view_state = view_state::LIST;
static invoice active_invoice = {0};

void draw_contact_form_ex(contact* buffer, bool viewing_only = false, bool with_autocomplete = false, bool* on_autocomplete = 0);

void ui_setup_invoices()
{
    current_view_state = view_state::LIST;
    active_invoice = administration_create_empty_invoice();
}

void draw_costcenter_selector(char* costcenter_id)
{
    cost_center* selected_costcenter = NULL;

    u32 costcenter_count = administration_get_cost_center_count();
    cost_center* buffer = (cost_center*) malloc(sizeof(cost_center) * costcenter_count);
    costcenter_count = administration_get_cost_centers(buffer);

    // Select cost center by given id.
    if (strlen(costcenter_id) > 0)
    {
        for (u32 i = 0; i < costcenter_count; i++)
        {
            if (strcmp(buffer[i].id, costcenter_id) == 0)
            {
                selected_costcenter = &buffer[i];
                break;
            }
        }
    }

    int selected_costcenter_index = -1;
    if (ImGui::BeginCombo("Cost center", selected_costcenter == NULL ? NULL : localize(selected_costcenter->description)))
    {
        for (u32 n = 0; n < costcenter_count; n++)
        {
            bool is_selected = selected_costcenter && strcmp(selected_costcenter->id, buffer[n].id) == 0;
            if (ImGui::Selectable(localize(buffer[n].description), is_selected)) {
                selected_costcenter_index = n;
            }
        }
        ImGui::EndCombo();
    }
    
    if (selected_costcenter_index != -1) {
        strops_copy(costcenter_id, buffer[selected_costcenter_index].id, 16);
    }

    free(buffer);
}

void draw_project_selector(char* project_id)
{
    project* selected_project = NULL;

    u32 project_count = administration_get_project_count();
    project* buffer = (project*) malloc(sizeof(project) * project_count);
    project_count = administration_get_all_projects(buffer);

    // Select project by given id.
    if (strlen(project_id) > 0)
    {
        for (u32 i = 0; i < project_count; i++)
        {
            if (strcmp(buffer[i].id, project_id) == 0)
            {
                selected_project = &buffer[i];
                break;
            }
        }
    }

    int selected_project_index = -1;
    if (ImGui::BeginCombo("Project", selected_project == NULL ? NULL : selected_project->description))
    {
        for (u32 n = 0; n < project_count; n++)
        {
            bool is_selected = selected_project && strcmp(selected_project->id, buffer[n].id) == 0;
            if (ImGui::Selectable(buffer[n].description, is_selected)) {
                selected_project_index = n;
            }
        }
        ImGui::EndCombo();
    }
    
    if (selected_project_index != -1) {
        strops_copy(project_id, buffer[selected_project_index].id, 16);
    }

    free(buffer);
}

void draw_invoice_form(invoice* buffer, bool viewing_only = false)
{
    //float widthAvailable = ImGui::GetContentRegionAvail().x;
    ImGui::BeginDisabled();

    // 1. Identifier
    //ImGui::SetNextItemWidth(widthAvailable*0.2f);
    //ImGui::InputText(localize("contact.form.identifier"), buffer->id, IM_ARRAYSIZE(buffer->id));
    if (!viewing_only) ImGui::EndDisabled();

    // 2. Sequential number
    ImGui::Text("Invoice number: %s", buffer->sequential_number);

    // 3. Supplier (you)
    ImGui::Text("Supplier: %s", buffer->supplier.name);

        // 6. Invoice issued at
    ImGui::BeginDisabled();
    tm issued_at_date = *gmtime(&buffer->issued_at);
    if (ImGui::DatePicker("##issuedAt", issued_at_date))
    {
        buffer->issued_at = mktime(&issued_at_date);
    }
    ImGui::SameLine();
    ImGui::Text("Invoice issued at");
    ImGui::EndDisabled();

    // 7. Invoice expires at
    ImGui::BeginDisabled();
    tm expires_at_date = *gmtime(&buffer->expires_at);
    if (ImGui::DatePicker("##expiresAt", expires_at_date))
    {
        buffer->expires_at = mktime(&expires_at_date);
    }
    ImGui::SameLine();
    ImGui::Text("Invoice expires at");
    ImGui::EndDisabled();

    // 8. Product/service delivered at
    tm delivered_at_date = *gmtime(&buffer->delivered_at);
    if (ImGui::DatePicker("##deliveredAt", delivered_at_date))
    {
        buffer->delivered_at = mktime(&delivered_at_date);
    }
    ImGui::SameLine();
    ImGui::Text("Product/service delivered at");

    ImGui::Separator();

    // 4. Customer information
    ImGui::Text("Billing information");
    bool on_autocomplete;
    draw_contact_form_ex(&buffer->customer, false, true, &on_autocomplete);

    if (on_autocomplete) {
        strops_copy(buffer->customer_id, buffer->customer.id, sizeof(buffer->customer_id));
    }

    // 5. (optional) shipping address.
    static bool shipping_is_billing_addr = true;
    ImGui::Checkbox("Shipping information is billing information", &shipping_is_billing_addr);
    if (!shipping_is_billing_addr) {
        ImGui::Spacing();
        ImGui::Text("Shipping information");
        ui_draw_address_form(&buffer->shipping_address);
    }
    ImGui::Separator();

    // 9. Project selection
    draw_project_selector(buffer->project_id);

    // 10. Cost center selection
    draw_costcenter_selector(buffer->cost_center_id);

    //ImGui::SetNextItemWidth(widthAvailable*0.5f);
    //ImGui::InputTextWithHint("Invoice number", "Invoice number", buffer->sequential_number, IM_ARRAYSIZE(buffer->sequential_number));
    //ImGui::SameLine();ui_helper_draw_required_tag();
    
    if (viewing_only) ImGui::EndDisabled();
}

void draw_invoices_list()
{
    // Table header controls: create button and pagination.
    if (ImGui::Button(localize("form.create")))
    {
        current_view_state = view_state::CREATE;
        active_invoice = administration_create_empty_invoice(); 
        active_invoice.supplier = administration_get_company_info();
        strops_copy(active_invoice.supplier_id, active_invoice.supplier.id, sizeof(active_invoice.supplier_id));
    }
}

void ui_draw_invoices()
{
    switch(current_view_state)
    {
        case view_state::LIST: draw_invoices_list(); break;
        case view_state::CREATE:

            if (ImGui::Button(localize("form.back"))) {
                current_view_state = view_state::LIST;
            }
            draw_invoice_form(&active_invoice);

            //if () {
                //administration_create_invoice(active_invoice);
                //current_view_state = view_state::LIST;
            //} 
            break;
        case view_state::EDIT: break;
        case view_state::VIEW: break;
    }
}