#pragma once

#include "config.hpp"
#include "simclist.h"

typedef struct
{
    char id[16];
    char country_code[3];
    float rate; // 0-100
    char description[32];
} country_tax_bracket;

typedef struct
{
    char id[16];
    char code[5];
    char description[64];
} cost_center;

typedef struct
{
    char address1[128];
    char address2[128];
    char country_code[3]; // 2 letter country code.
} address;

typedef enum
{
    CONTACT_BUSINESS,
    CONTACT_CONSUMER,
} contact_type;

typedef struct
{
    char id[16];
    char name[64];
    address address;
    contact_type type;
    char taxid[32];
    char businessid[32];
    char email[64];
    char phone_number[16];
    char bank_account[32];
} contact;

typedef enum
{
    PROJECT_RUNNING,
    PROJECT_PAUSED,
    PROJECT_CANCELLED,
} project_state;

typedef struct
{
    char id[16];
    char description[64];
    project_state state;
    time_t start_date;
    time_t end_date;
} project;

typedef enum
{
    INVOICE_PAID,
    INVOICE_EXPIRED,
    INVOICE_CANCELLED,
    INVOICE_REFUNDED,
    INVOICE_CORRECTED,
} invoice_status;

#define CURRENCY_LENGTH 8

typedef struct
{
    char id[16];
    char invoice_id[16];
    float amount;
    bool amount_is_percentage;
    char description[128];
    float net_per_item;
    float discount;
    bool discount_is_percentage;
    float net;
    char currency[CURRENCY_LENGTH];
    char tax_bracket_id[16];
    
    // todo
    char tax_section[16];
    float tax;
    float total;
    bool is_intra_community;
    bool is_triangulation;
    char internal_code[64];
} billing_item;

typedef struct
{
    char id[16];
    char sequential_number[16]; // INV0000000000 - INV9999999999
    char customer_id[16];
    char supplier_id[16];
    address shipping_address;
    time_t issued_at;
    time_t expires_at;
    time_t delivered_at;
    char document[255]; // path to copy of document for incomming invoice.
    char project_id[16];
    char cost_center_id[16];
    
    list_t billing_items;
    float total;
    float tax;
    float net;
    invoice_status status;
    char currency[CURRENCY_LENGTH];

    time_t payment_on_account_date; // TODO
    char tax_representative[64]; // TODO
    char corrected_sequential_number[16]; // TODO

    // Not stored.
    contact supplier;
    contact customer;
} invoice;

typedef struct
{
    // Company info used for invoices. User should not be able to create invoices when this is empty.
    contact company_info;

    s32 next_id; // Shared across all objects that have an ID.
    s32 next_sequence_number; // Sequence number for generating invoice numbers.
    char path[4096];
    char program_version[10];
    list_t contacts;
    list_t projects;
    list_t invoices;
    list_t tax_brackets;
    list_t cost_centers;
} administration;

void    administration_create();
void    administration_destroy();

char*   administration_get_file_path();

contact administration_get_company_info();
void    administration_set_company_info(contact data);

bool    administration_can_contact_be_deleted(contact data);
bool    administration_remove_contact(contact data);
bool    administration_create_contact(contact data);
bool    administration_update_contact(contact data);
u32     administration_get_contact_count();
u32     administration_get_contacts(u32 page_index, u32 page_size, contact* buffer);
contact administration_create_empty_contact();
bool    administration_is_contact_valid(contact data);
int     administration_get_contact_recommendations(contact* buffer, int buf_size, char* name);

void    administration_cancel_project(project data);
bool    administration_remove_project(project data);
bool    administration_create_project(project data);
bool    administration_update_project(project data);
char*   administration_project_get_status_string(project data);
u32     administration_get_project_count();
u32     administration_get_projects(u32 page_index, u32 page_size, project* buffer);
bool    administration_is_project_valid(project data);
project administration_create_empty_project();
u32     administration_get_all_projects(project* buffer);

u32     administration_get_tax_bracket_count();
u32     administration_get_tax_brackets(country_tax_bracket* buffer);
u32     administration_get_tax_brackets_for_country(country_tax_bracket* buffer, char* country_code);
bool    administration_add_tax_bracket(country_tax_bracket data);
bool    administration_update_tax_bracket(country_tax_bracket data);

u32     administration_get_cost_center_count();
u32     administration_get_cost_centers(cost_center* buffer);
bool    administration_verify_cost_center_code(char* code);
bool    administration_verify_cost_center_description(char* text);
bool    administration_add_cost_center(cost_center data);
bool    administration_update_cost_center(cost_center data);

invoice administration_create_empty_invoice();
void    administration_invoice_set_currency(invoice* invoice, char* currency);

billing_item administration_create_empty_billing_item();
u32     administration_get_all_billing_items_for_invoice(invoice* invoice, billing_item* buffer);
u32     administration_get_billing_items_count(invoice* invoice);
bool    administration_add_billing_item_to_invoice(invoice* invoice, billing_item item);
bool    administration_update_billing_item_of_invoice(invoice* invoice, billing_item item);