import json as json_lib
from fastapi import APIRouter, Request, Depends
from fastapi.responses import JSONResponse

import httpx

from app.database import get_connection
from app.auth import get_current_user
from app.services.firebird_service import get_firebird_from_config
from app.services.json_generator import (
    generar_tercero_api,
    generar_rda_paciente,
    agrupar_por_recepcion,
)
from app.services.api_client import get_tns_token, TNS_BASE

router = APIRouter(prefix="/test-rda", tags=["test-rda"])

_SQL_RDA_BY_WHERE = """
SELECT
    r.IDRECEPCION, r.PREFIJO, r.NUM_FACTURA, r.FECHA_RECEPCION, r.COD_PACIENTE,
    r.NIT_EMPRESA, r.DIAG_PPAL, r.TIPOUSU, r.TIPOUSUSISPRO, r.AUTORIZACION, r.CLASEPROC,
    r.HORAINICIORECEPCION, r.VALORTOTAL, rel.COD_EXAMEN, rel.PRECIO, rel.DESCUENTO, rel.FECHA_REPORTADO,
    m.COD_ESPECIALIDAD,
    COALESCE(NULLIF(TRIM(m.CODIGO), ''), NULLIF(TRIM(r.USUARIO), ''), '') AS profesional,
    e.CODCONTRATO,
    TRIM(m.DOCIDMEDICO) AS DOCIDMEDICO
FROM RECEPCION r
JOIN RELACION rel ON rel.IDRECEPCION = r.IDRECEPCION
LEFT JOIN MEDICO m ON m.CODIGO = r.COD_MEDICO
LEFT JOIN EMPRESA e ON e.NIT = r.NIT_EMPRESA
WHERE {where}
  AND r.NUM_FACTURA > 0
  AND e.CODCONTRATO IS NOT NULL
  AND TRIM(e.CODCONTRATO) <> ''
ORDER BY r.IDRECEPCION
"""

_SQL_CANDIDATOS = """
SELECT FIRST 100
    r.IDRECEPCION,
    r.NUM_FACTURA,
    r.FECHA_RECEPCION,
    r.COD_PACIENTE,
    r.NIT_EMPRESA,
    e.CODCONTRATO,
    LIST(DISTINCT rel.COD_EXAMEN, ', ') AS examenes,
    COUNT(DISTINCT rel.COD_EXAMEN) AS total_examenes
FROM RECEPCION r
JOIN RELACION rel ON rel.IDRECEPCION = r.IDRECEPCION
LEFT JOIN EMPRESA e ON e.NIT = r.NIT_EMPRESA
WHERE r.NUM_FACTURA > 0
  AND e.CODCONTRATO IS NOT NULL
  AND TRIM(e.CODCONTRATO) <> ''
GROUP BY r.IDRECEPCION, r.NUM_FACTURA, r.FECHA_RECEPCION, r.COD_PACIENTE, r.NIT_EMPRESA, e.CODCONTRATO
ORDER BY r.IDRECEPCION DESC
"""

_SQL_PACIENTE = """
SELECT p.CODIGO, p.NOMBRES, p.APELLIDOS, p.DOCIDENT, p.TIPOIDENT,
       p.F_NACIMIENTO, p.SEXO, p.DIRECCION, p.TELEFONOS, p.EMAIL
FROM PACIENTE p WHERE p.CODIGO = :cod
"""


@router.get("")
async def test_page(request: Request, user: dict = Depends(get_current_user)):
    return request.app.state.templates.TemplateResponse(
        "test_rda.html", {"request": request, "user": user}
    )


@router.get("/enviados")
async def get_enviados(request: Request, user: dict = Depends(get_current_user)):
    db = get_connection()
    rows = db.execute(
        "SELECT idrecepcion, ok FROM rda_test_log ORDER BY created_at DESC"
    ).fetchall()
    db.close()
    enviados = {r["idrecepcion"]: bool(r["ok"]) for r in rows}
    return JSONResponse({"enviados": enviados})


@router.get("/candidatos")
async def get_candidatos(request: Request, user: dict = Depends(get_current_user),
                         contrato: str = "", factura: str = "", articulos: str = "",
                         tipo_usuario: str = "", offset: int = 0):
    db = get_connection()
    cfg = {r[0]: r[1] for r in db.execute("SELECT key, value FROM config").fetchall()}
    db.close()

    fb, fb_ok, fb_msg = get_firebird_from_config(cfg)
    if not fb_ok:
        return JSONResponse({"error": f"Error Firebird: {fb_msg}"})

    arts_default = "CH4,CREA,TGP,VSG,PCR,AU,FER,TPO,TSH,TGO,GLI,BUN,COL,TRI,HDL,LDL,HBA1,VB12,VITD,PO,K,NA,MG,URO,PRL,T4L,T3,T4,T3L,HIV,VDRL,PSA,AFP,CEA,CA125,CA199,FV,TP,TPT"
    arts_str = articulos.strip() if articulos.strip() else arts_default
    arts_list = [a.strip().upper() for a in arts_str.split(",") if a.strip()]
    arts_in = ", ".join(f"'{a}'" for a in arts_list)

    es_particular = tipo_usuario.strip() == "12"

    filtros = ["r.NUM_FACTURA > 0"]

    if not es_particular:
        # Para convenios: solo registros con contrato registrado
        filtros += [
            "e.CODCONTRATO IS NOT NULL",
            "TRIM(e.CODCONTRATO) <> ''",
        ]

    # Solo exámenes configurados en TNS
    filtros.append(
        f"NOT EXISTS (SELECT 1 FROM RELACION rx WHERE rx.IDRECEPCION = r.IDRECEPCION AND rx.COD_EXAMEN NOT IN ({arts_in}))"
    )

    params = {}
    if contrato:
        c = contrato.strip()
        c_alt = c.lstrip("0") or c          # "012" → "12", "12" → "12"
        c_pad = c.zfill(max(3, len(c)))     # "12" → "012", "011" → "011"
        filtros.append("TRIM(e.CODCONTRATO) IN (:contrato, :contrato_alt, :contrato_pad)")
        params["contrato"] = c
        params["contrato_alt"] = c_alt
        params["contrato_pad"] = c_pad
    elif es_particular:
        # Particulares: NIT_EMPRESA es PART/PARTIC o sin contrato
        filtros.append(
            "(r.TIPOUSUSISPRO = '12' OR r.NIT_EMPRESA IN ('PART', 'PARTIC', 'PARTICULAR') "
            "OR COALESCE(TRIM(e.CODCONTRATO), '') = '')"
        )
    if tipo_usuario and not es_particular:
        filtros.append("r.TIPOUSUSISPRO = :tipo_usuario")
        params["tipo_usuario"] = tipo_usuario.strip()
    if factura:
        filtros.append("r.NUM_FACTURA = :factura")
        params["factura"] = int(factura)

    sql_final = f"""
    SELECT FIRST 10 SKIP {int(offset)}
        r.IDRECEPCION, r.NUM_FACTURA, r.FECHA_RECEPCION, r.COD_PACIENTE, r.NIT_EMPRESA,
        e.CODCONTRATO,
        LIST(DISTINCT rel.COD_EXAMEN, ', ') AS EXAMENES,
        COUNT(DISTINCT rel.COD_EXAMEN) AS TOTAL_EXAMENES
    FROM RECEPCION r
    JOIN RELACION rel ON rel.IDRECEPCION = r.IDRECEPCION
    LEFT JOIN EMPRESA e ON e.NIT = r.NIT_EMPRESA
    WHERE {" AND ".join(filtros)}
    GROUP BY r.IDRECEPCION, r.NUM_FACTURA, r.FECHA_RECEPCION, r.COD_PACIENTE, r.NIT_EMPRESA, e.CODCONTRATO
    ORDER BY r.IDRECEPCION DESC
    """

    ok2, err2, rows = fb.execute_query(sql_final, params)
    fb.disconnect()

    if not ok2:
        return JSONResponse({"error": err2})

    candidatos = []
    for row in rows:
        candidatos.append({
            "idrecepcion": row.get("IDRECEPCION"),
            "factura": row.get("NUM_FACTURA"),
            "fecha": str(row.get("FECHA_RECEPCION", ""))[:10],
            "paciente": row.get("COD_PACIENTE", ""),
            "empresa": row.get("NIT_EMPRESA", ""),
            "contrato": row.get("CODCONTRATO", ""),
            "examenes": row.get("EXAMENES", ""),
            "total": row.get("TOTAL_EXAMENES", 0),
        })

    return JSONResponse({"candidatos": candidatos})


@router.get("/preview")
async def preview_rda(request: Request, user: dict = Depends(get_current_user),
                      idrecepcion: int = 0):
    if not idrecepcion:
        return JSONResponse({"error": "Falta idrecepcion"})
    db = get_connection()
    cfg = {r[0]: r[1] for r in db.execute("SELECT key, value FROM config").fetchall()}
    db.close()
    prof_def = cfg.get("profesional_default", "XIMENA")
    esp_def = cfg.get("especialidad_default", "02")
    remis_def = cfg.get("remisionante_default", "00")
    prefijo_def = cfg.get("prefijo_tns_default", "00")
    fb, fb_ok, fb_msg = get_firebird_from_config(cfg)
    if not fb_ok:
        return JSONResponse({"error": fb_msg})
    ok2, err2, rows_rda = fb.execute_query(
        _SQL_RDA_BY_WHERE.format(where="r.IDRECEPCION = :val"), {"val": idrecepcion}
    )
    fb.disconnect()
    if not ok2 or not rows_rda:
        return JSONResponse({"error": err2 or "Sin registros"})
    grupos = agrupar_por_recepcion(rows_rda)
    rda_json = generar_rda_paciente(list(grupos.values())[0], prof_def, esp_def, remis_def, prefijo_def)
    return JSONResponse({"json": rda_json})


@router.post("/enviar")
async def test_enviar(request: Request, user: dict = Depends(get_current_user)):
    form = await request.form()
    modo = form.get("modo", "idrecepcion")
    valor = str(form.get("valor", "")).strip()

    if not valor:
        return JSONResponse({"error": "Ingresa un IDRECEPCION o número de factura"})

    db = get_connection()
    cfg = {r[0]: r[1] for r in db.execute("SELECT key, value FROM config").fetchall()}
    db.close()

    prof_def = cfg.get("profesional_default", "XIMENA")
    esp_def = cfg.get("especialidad_default", "02")
    remis_def = cfg.get("remisionante_default", "00")
    prefijo_def = cfg.get("prefijo_tns_default", "00")
    api_sucursal = cfg.get("api_sucursal", "00") or "00"

    fb, fb_ok, fb_msg = get_firebird_from_config(cfg)
    if not fb_ok:
        return JSONResponse({"error": f"Error Firebird: {fb_msg}"})

    if modo == "factura":
        import re as _re
        nums = _re.findall(r'\d+', valor)
        num_val = int(nums[-1]) if nums else 0
        prefix = _re.sub(r'[\d\s]', '', valor).strip().upper()
        if prefix:
            where = "r.NUM_FACTURA = :val AND TRIM(r.PREFIJO) = :prefijo"
            params = {"val": num_val, "prefijo": prefix}
        else:
            where = "r.NUM_FACTURA = :val"
            params = {"val": num_val}
    else:
        where = "r.IDRECEPCION = :val"
        params = {"val": int(valor)}

    ok2, err2, rows_rda = fb.execute_query(
        _SQL_RDA_BY_WHERE.format(where=where), params
    )
    if not ok2:
        fb.disconnect()
        return JSONResponse({"error": f"Error consulta: {err2}"})

    if not rows_rda:
        fb.disconnect()
        return JSONResponse({"error": "Sin registros (¿NUM_FACTURA = 0 o contrato vacío?)"})

    # Pacientes únicos
    pacientes_unicos = {}
    for row in rows_rda:
        cod = str(row.get("COD_PACIENTE", "")).strip()
        if cod and cod not in pacientes_unicos:
            ok3, err3, prows = fb.execute_query(_SQL_PACIENTE, {"cod": cod})
            if ok3 and prows:
                pacientes_unicos[cod] = prows[0]

    fb.disconnect()

    token, err_tns = await get_tns_token(
        cfg.get("tns_empresa", ""), cfg.get("tns_usuario", ""), cfg.get("tns_password", "")
    )
    if not token:
        return JSONResponse({"error": f"Error login TNS: {err_tns}"})

    headers = {"Authorization": f"Bearer {token}", "Content-Type": "application/json"}
    endpoint_rda = f"{TNS_BASE}/v2/rda/RdaPaciente/Insertar?codigosucursal={api_sucursal}"

    pasos = []

    # Paso 1: crear terceros
    async with httpx.AsyncClient(timeout=20) as client:
        for cod, pac_row in pacientes_unicos.items():
            tercero_json = generar_tercero_api(pac_row)
            try:
                r = await client.post(
                    f"{TNS_BASE}/v2/tablas/Tercero/Crear",
                    json=tercero_json, headers=headers,
                )
                try:
                    data = r.json()
                    msg = data.get("message") or r.text[:200]
                except Exception:
                    msg = r.text[:200]
                pasos.append({
                    "tipo": "tercero",
                    "codigo": cod,
                    "nombre": tercero_json.get("nombre", ""),
                    "status": r.status_code,
                    "ok": r.status_code in (200, 201),
                    "mensaje": msg,
                })
            except Exception as ex:
                pasos.append({"tipo": "tercero", "codigo": cod, "ok": False, "mensaje": str(ex)})

    # Paso 2: enviar RDA
    grupos = agrupar_por_recepcion(rows_rda)

    async with httpx.AsyncClient(timeout=30) as client:
        for id_rec, grupo_rows in grupos.items():
            num_factura = str(grupo_rows[0].get("NUM_FACTURA") or "").strip()
            numero_override = num_factura
            rda_json = generar_rda_paciente(grupo_rows, prof_def, esp_def, remis_def, prefijo_def, numero_override)
            examenes = [r.get("COD_EXAMEN", "") for r in grupo_rows]
            try:
                r = await client.post(endpoint_rda, json=rda_json, headers=headers)
                raw_resp = r.text
                try:
                    data = r.json()
                    ok_rda = bool(data.get("status") or (data.get("data") or {}).get("success", False)) if isinstance(data, dict) else False
                    msg_rda = (
                        ((data.get("data") or {}).get("response"))
                        or data.get("message")
                        or raw_resp[:300]
                    )
                except Exception:
                    ok_rda = r.status_code < 300
                    msg_rda = raw_resp[:300]
                pasos.append({
                    "tipo": "rda",
                    "idrecepcion": id_rec,
                    "factura": rda_json.get("numero", ""),
                    "paciente": rda_json.get("codTercero", ""),
                    "contrato": rda_json.get("numeroContrato", ""),
                    "examenes": examenes,
                    "status": r.status_code,
                    "ok": ok_rda,
                    "mensaje": msg_rda,
                    "respuesta_tns": raw_resp,
                    "json_enviado": rda_json,
                })
                if ok_rda:
                    facturas_usadas_sesion.add(num_factura)
                db_log = get_connection()
                db_log.execute(
                    "INSERT OR REPLACE INTO rda_test_log (idrecepcion, factura, contrato, ok, mensaje) VALUES (?,?,?,?,?)",
                    (id_rec, rda_json.get("numero", ""), rda_json.get("numeroContrato", ""), 1 if ok_rda else 0, msg_rda)
                )
                db_log.commit()
                db_log.close()
            except Exception as ex:
                pasos.append({
                    "tipo": "rda", "idrecepcion": id_rec, "ok": False,
                    "examenes": examenes, "mensaje": str(ex), "json_enviado": {},
                })

    rda_ok = sum(1 for p in pasos if p["tipo"] == "rda" and p["ok"])
    rda_err = sum(1 for p in pasos if p["tipo"] == "rda" and not p["ok"])

    return JSONResponse({
        "resumen": {
            "total_recepciones": len(grupos),
            "rda_exitosos": rda_ok,
            "rda_errores": rda_err,
            "pacientes_procesados": len(pacientes_unicos),
        },
        "pasos": pasos,
    })