use libc::{c_void, size_t};
use std::ffi::CString;
use std::ptr;

use crate::libssv::SSV_LireCartePS;
use crate::ssv_memory::{decode_ssv_memory, Block};

#[derive(Debug, Default)]
pub struct CartePS {
    titulaire: TitulairePS,
    situations: Vec<SituationPS>,
}

// 1. CB = Caractères Binaires »
// 2. CE = Caractères « Etendus » (ISO 8859-1)
// 3. CA = Caractères Alphanumériques (ASCII?)
// 4. CN = Caractères Numériques
#[derive(Debug, Default)]
struct TitulairePS {
    type_de_carte_ps: String,                         // CN
    type_d_identification_nationale: String,          // CN
    numero_d_identification_nationale: String,        // CE - 8 -> 30
    cle_du_numero_d_identification_nationale: String, // CN
    code_civilite: String,                            // CN
    nom_du_ps: String,                                // CE - 27
    prenom_du_ps: String,                             // CE - 27
    categorie_carte: char,                            // CA
}

#[derive(Debug, Default)]
struct SituationPS {
    numero_logique_de_la_situation_de_facturation_du_ps: u8,
    mode_d_exercice: String,
    statut_d_exercice: String,
    secteur_d_activite: String,
    type_d_identification_structure: String,
    numero_d_identification_structure: String,
    cle_du_numero_d_identification_structure: String,
    raison_sociale_structure: String,
    numero_d_identification_de_facturation_du_ps: String,
    cle_du_numero_d_identification_de_facturation_du_ps: String,
    numero_d_identification_du_ps_remplaçant: String,
    cle_du_numero_d_identification_du_ps_remplaçant: String,
    code_conventionnel: String,
    code_specialite: String,
    code_zone_tarifaire: String,
    code_zone_ik: String,
    code_agrement_1: String,
    code_agrement_2: String,
    code_agrement_3: String,
    habilitation_à_signer_une_facture: String,
    habilitation_à_signer_un_lot: String,
}

pub fn lire_carte(code_pin: &str, lecteur: &str) -> Result<CartePS, String> {
    let resource_ps = CString::new(lecteur).expect("CString::new failed");
    let resource_reader = CString::new("").expect("CString::new failed");
    let card_number = CString::new(code_pin).expect("CString::new failed");

    let mut buffer: *mut c_void = ptr::null_mut();
    let mut size: size_t = 0;
    let mut hex_values: &[u8] = &[];
    unsafe {
        let result = SSV_LireCartePS(
            resource_ps.as_ptr(),
            resource_reader.as_ptr(),
            card_number.as_ptr(),
            &mut buffer,
            &mut size,
        );
        println!("SSV_LireCartePS result: {}", result);

        if !buffer.is_null() {
            hex_values = std::slice::from_raw_parts(buffer as *const u8, size);
            libc::free(buffer);
        }
    }
    let groups = decode_ssv_memory(hex_values, hex_values.len());
    decode_carte_ps(groups)
}

fn decode_carte_ps(groups: Vec<Block>) -> Result<CartePS, String> {
    let mut carte_ps = CartePS::default();
    for group in groups {
        for field in group.content {
            match (group.id, field.id) {
                (1, 1) => {
                    carte_ps.titulaire.type_de_carte_ps =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (1, 2) => {
                    carte_ps.titulaire.type_d_identification_nationale =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (1, 3) => {
                    carte_ps.titulaire.numero_d_identification_nationale =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (1, 4) => {
                    carte_ps.titulaire.cle_du_numero_d_identification_nationale =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (1, 5) => {
                    carte_ps.titulaire.code_civilite =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (1, 6) => {
                    carte_ps.titulaire.nom_du_ps =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (1, 7) => {
                    carte_ps.titulaire.prenom_du_ps =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (1, 8) => {
                    let byte = field.content[0];
                    carte_ps.titulaire.categorie_carte = byte as char;
                }
                (2..=16, 1) => {
                    carte_ps.situations.push(SituationPS::default());
                    carte_ps
                        .situations
                        .last_mut()
                        .unwrap()
                        .numero_logique_de_la_situation_de_facturation_du_ps = field.content[0];
                }
                (2..=16, 2) => {
                    carte_ps.situations.last_mut().unwrap().mode_d_exercice =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 3) => {
                    carte_ps.situations.last_mut().unwrap().statut_d_exercice =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 4) => {
                    carte_ps.situations.last_mut().unwrap().secteur_d_activite =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 5) => {
                    carte_ps
                        .situations
                        .last_mut()
                        .unwrap()
                        .type_d_identification_structure =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 6) => {
                    carte_ps
                        .situations
                        .last_mut()
                        .unwrap()
                        .numero_d_identification_structure =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 7) => {
                    carte_ps
                        .situations
                        .last_mut()
                        .unwrap()
                        .cle_du_numero_d_identification_structure =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 8) => {
                    carte_ps
                        .situations
                        .last_mut()
                        .unwrap()
                        .raison_sociale_structure =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 9) => {
                    carte_ps
                        .situations
                        .last_mut()
                        .unwrap()
                        .numero_d_identification_de_facturation_du_ps =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 10) => {
                    carte_ps
                        .situations
                        .last_mut()
                        .unwrap()
                        .cle_du_numero_d_identification_de_facturation_du_ps =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 11) => {
                    carte_ps
                        .situations
                        .last_mut()
                        .unwrap()
                        .numero_d_identification_du_ps_remplaçant =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 12) => {
                    carte_ps
                        .situations
                        .last_mut()
                        .unwrap()
                        .cle_du_numero_d_identification_du_ps_remplaçant =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 13) => {
                    carte_ps.situations.last_mut().unwrap().code_conventionnel =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 14) => {
                    carte_ps.situations.last_mut().unwrap().code_specialite =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 15) => {
                    carte_ps.situations.last_mut().unwrap().code_zone_tarifaire =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 16) => {
                    carte_ps.situations.last_mut().unwrap().code_zone_ik =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 17) => {
                    carte_ps.situations.last_mut().unwrap().code_agrement_1 =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 18) => {
                    carte_ps.situations.last_mut().unwrap().code_agrement_2 =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 19) => {
                    carte_ps.situations.last_mut().unwrap().code_agrement_3 =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 20) => {
                    carte_ps
                        .situations
                        .last_mut()
                        .unwrap()
                        .habilitation_à_signer_une_facture =
                        String::from_utf8_lossy(field.content).to_string();
                }
                (2..=16, 21) => {
                    carte_ps
                        .situations
                        .last_mut()
                        .unwrap()
                        .habilitation_à_signer_un_lot =
                        String::from_utf8_lossy(field.content).to_string();
                }
                _ => {
                    return Err(format!(
                        "Unknown (group, field) pair: ({}, {})",
                        group.id, field.id
                    ))
                }
            }
        }
    }
    Ok(carte_ps)
}

#[cfg(test)]
mod test_decode_carte_ps {
    use super::*;

    #[test]
    fn test_francoise_pharmacien0052419() {
        let bytes: &[u8] = &[
            0, 1, 51, // Block 01, Content size 51
            1, 48, // Field 01, Content size 1
            1, 56, // Field 02, Content size 1
            11, 57, 57, 55, 48, 48, 53, 50, 52, 49, 57, 52, // Field 03, Content size 11
            1, 52, // Field 04, Content size 1
            2, 50, 50, // Field 05, Content size 2
            17, 80, 72, 65, 82, 77, 65, 67, 73, 69, 78, 48, 48, 53, 50, 52, 49,
            57, // Field 06, Content size 17
            9, 70, 82, 65, 78, 67, 79, 73, 83, 69, // Field 07, Content size 9
            1, 84, // Field 08, Content size 1
            0, 2, 83, // Block 02, Content size 83
            1, 1, 1, 48, 1, 49, 2, 56, 54, 1, 49, 9, 48, 66, 48, 50, 50, 49, 57, 53, 56, 1, 56, 24,
            80, 72, 65, 82, 77, 65, 67, 73, 69, 32, 68, 85, 32, 67, 69, 78, 84, 82, 69, 50, 50, 49,
            57, 53, 8, 48, 48, 50, 48, 50, 52, 49, 57, 1, 56, 0, 1, 48, 1, 49, 2, 53, 48, 2, 49,
            48, 2, 48, 48, 1, 48, 1, 48, 1, 48, 1, 49, 1, 49,
        ];
        let blocks = decode_ssv_memory(bytes, bytes.len());
        let carte_ps = decode_carte_ps(blocks).unwrap();

        assert_eq!(carte_ps.titulaire.type_de_carte_ps, "0");
        assert_eq!(carte_ps.titulaire.type_d_identification_nationale, "8");
        assert_eq!(
            carte_ps.titulaire.numero_d_identification_nationale,
            "99700524194"
        );
        assert_eq!(
            carte_ps.titulaire.cle_du_numero_d_identification_nationale,
            "4"
        );
        assert_eq!(carte_ps.titulaire.code_civilite, "22");
        assert_eq!(carte_ps.titulaire.nom_du_ps, "PHARMACIEN0052419");
        assert_eq!(carte_ps.titulaire.prenom_du_ps, "FRANCOISE");
        assert_eq!(carte_ps.titulaire.categorie_carte, 'T');

        assert_eq!(carte_ps.situations.len(), 1);
        assert_eq!(
            carte_ps.situations[0].numero_logique_de_la_situation_de_facturation_du_ps,
            1
        );
        assert_eq!(carte_ps.situations[0].mode_d_exercice, "0");
        assert_eq!(carte_ps.situations[0].statut_d_exercice, "1");
        assert_eq!(carte_ps.situations[0].secteur_d_activite, "86");
        assert_eq!(carte_ps.situations[0].type_d_identification_structure, "1");
        assert_eq!(
            carte_ps.situations[0].numero_d_identification_structure,
            "0B0221958"
        );
        assert_eq!(
            carte_ps.situations[0].cle_du_numero_d_identification_structure,
            "8"
        );
        assert_eq!(
            carte_ps.situations[0].raison_sociale_structure,
            "PHARMACIE DU CENTRE22195"
        );
        assert_eq!(
            carte_ps.situations[0].numero_d_identification_de_facturation_du_ps,
            "00202419"
        );
        assert_eq!(
            carte_ps.situations[0].cle_du_numero_d_identification_de_facturation_du_ps,
            "8"
        );
        assert_eq!(
            carte_ps.situations[0].numero_d_identification_du_ps_remplaçant,
            ""
        );
        assert_eq!(
            carte_ps.situations[0].cle_du_numero_d_identification_du_ps_remplaçant,
            "0"
        );
        assert_eq!(carte_ps.situations[0].code_conventionnel, "1");
        assert_eq!(carte_ps.situations[0].code_specialite, "50");
        assert_eq!(carte_ps.situations[0].code_zone_tarifaire, "10");
        assert_eq!(carte_ps.situations[0].code_zone_ik, "00");
        assert_eq!(carte_ps.situations[0].code_agrement_1, "0");
        assert_eq!(carte_ps.situations[0].code_agrement_2, "0");
        assert_eq!(carte_ps.situations[0].code_agrement_3, "0");
        assert_eq!(
            carte_ps.situations[0].habilitation_à_signer_une_facture,
            "1"
        );
        assert_eq!(carte_ps.situations[0].habilitation_à_signer_un_lot, "1");
    }

    #[test]
    fn test_multiple_situations() {
        let bytes: &[u8] = &[
            0, 1, 51, // Block 01, Content size 51
            1, 48, 1, 56, 11, 57, 57, 55, 48, 48, 53, 50, 52, 49, 57, 52, 1, 52, 2, 50, 50, 17, 80,
            72, 65, 82, 77, 65, 67, 73, 69, 78, 48, 48, 53, 50, 52, 49, 57, 9, 70, 82, 65, 78, 67,
            79, 73, 83, 69, 1, 84, 0, 2, 83, // Block 02, Content size 83
            1, 1, 1, 48, 1, 49, 2, 56, 54, 1, 49, 9, 48, 66, 48, 50, 50, 49, 57, 53, 56, 1, 56, 24,
            80, 72, 65, 82, 77, 65, 67, 73, 69, 32, 68, 85, 32, 67, 69, 78, 84, 82, 69, 50, 50, 49,
            57, 53, 8, 48, 48, 50, 48, 50, 52, 49, 57, 1, 56, 0, 1, 48, 1, 49, 2, 53, 48, 2, 49,
            48, 2, 48, 48, 1, 48, 1, 48, 1, 48, 1, 49, 1, 49, 0, 3,
            83, // Block 03, Content size 83
            1, 1, 1, 48, 1, 49, 2, 56, 54, 1, 49, 9, 48, 66, 48, 50, 50, 49, 57, 53, 56, 1, 56, 24,
            80, 72, 65, 82, 77, 65, 67, 73, 69, 32, 68, 85, 32, 67, 69, 78, 84, 82, 69, 50, 50, 49,
            57, 53, 8, 48, 48, 50, 48, 50, 52, 49, 57, 1, 56, 0, 1, 48, 1, 49, 2, 53, 48, 2, 49,
            48, 2, 48, 48, 1, 48, 1, 48, 1, 48, 1, 49, 1, 49, 0, 4,
            83, // Block 04, Content size 83
            1, 1, 1, 48, 1, 49, 2, 56, 54, 1, 49, 9, 48, 66, 48, 50, 50, 49, 57, 53, 56, 1, 56, 24,
            80, 72, 65, 82, 77, 65, 67, 73, 69, 32, 68, 85, 32, 67, 69, 78, 84, 82, 69, 50, 50, 49,
            57, 53, 8, 48, 48, 50, 48, 50, 52, 49, 57, 1, 56, 0, 1, 48, 1, 49, 2, 53, 48, 2, 49,
            48, 2, 48, 48, 1, 48, 1, 48, 1, 48, 1, 49, 1, 49,
        ];
        let blocks = decode_ssv_memory(bytes, bytes.len());
        let carte_ps = decode_carte_ps(blocks).unwrap();

        assert_eq!(carte_ps.situations.len(), 3);
        assert_eq!(
            carte_ps.situations[0].raison_sociale_structure,
            "PHARMACIE DU CENTRE22195"
        );
        assert_eq!(
            carte_ps.situations[1].raison_sociale_structure,
            "PHARMACIE DU CENTRE22195"
        );
        assert_eq!(
            carte_ps.situations[2].raison_sociale_structure,
            "PHARMACIE DU CENTRE22195"
        );
    }

    #[test]
    #[should_panic]
    fn test_missing_field() {
        todo!();
    }

    #[test]
    #[should_panic]
    fn test_unknown_group_field_pair() {
        todo!();
    }

    #[test]
    #[should_panic]
    fn test_invalid_field_format() {
        todo!();
    }
}