from __future__ import annotations

import os
from typing import Any

from fastapi import APIRouter, File, Form, Request, UploadFile
from fastapi.responses import FileResponse
from pydantic import BaseModel, Field

from app.services import auth_service, elaboracao_service
from app.services.audit_log_service import log_event
from app.services.session_store import session_store


router = APIRouter(prefix="/api/elaboracao", tags=["elaboracao"])


class SessionPayload(BaseModel):
    session_id: str


class ConfirmSheetPayload(SessionPayload):
    sheet_name: str


class MapCoordsPayload(SessionPayload):
    col_lat: str
    col_lon: str


class GeocodePayload(SessionPayload):
    col_cdlog: str
    col_num: str
    auto_200: bool = False


class CorrecaoGeo(BaseModel):
    linha: int
    cdlog_corrigido: str | None = None
    numero_corrigido: str | None = None


class GeocodeCorrecaoPayload(SessionPayload):
    correcoes: list[CorrecaoGeo] = Field(default_factory=list)
    auto_200: bool = False


class ApplySelectionPayload(SessionPayload):
    coluna_y: str
    colunas_x: list[str]
    tipo_y: str | None = None
    coluna_area: str | None = None
    dicotomicas: list[str] = Field(default_factory=list)
    codigo_alocado: list[str] = Field(default_factory=list)
    percentuais: list[str] = Field(default_factory=list)
    outliers_anteriores: list[int] = Field(default_factory=list)
    grau_min_coef: int = 0
    grau_min_f: int = 0


class ClassificarXPayload(SessionPayload):
    colunas_x: list[str] = Field(default_factory=list)


class SearchTransformPayload(SessionPayload):
    grau_min_coef: int = 0
    grau_min_f: int = 0
    transformacoes_fixas: dict[str, str] = Field(default_factory=dict)
    transformacao_y_fixa: str | None = None


class AdoptSuggestionPayload(SessionPayload):
    indice: int


class FitModelPayload(SessionPayload):
    transformacao_y: str
    transformacoes_x: dict[str, str] = Field(default_factory=dict)
    dicotomicas: list[str] = Field(default_factory=list)
    codigo_alocado: list[str] = Field(default_factory=list)
    percentuais: list[str] = Field(default_factory=list)


class DispersaoPayload(SessionPayload):
    eixo_x: str = "transformado"
    eixo_y_tipo: str = "y_transformado"
    eixo_y_residuo: str | None = None
    eixo_y_coluna: str | None = None


class DispersaoInterativoPayload(SessionPayload):
    alvo: str = "secao10"


class DiagnosticoInterativoPayload(SessionPayload):
    grafico: str = "obs_calc"


class TransformPreviewPayload(SessionPayload):
    transformacao_y: str = "(x)"
    transformacoes_x: dict[str, str] = Field(default_factory=dict)


class OutlierFiltro(BaseModel):
    variavel: str
    operador: str
    valor: float


class OutlierFilterPayload(SessionPayload):
    filtros: list[OutlierFiltro] = Field(default_factory=list)


class OutlierRestartPayload(SessionPayload):
    outliers_texto: str | None = None
    reincluir_texto: str | None = None
    grau_min_coef: int = 3
    grau_min_f: int = 3


class OutlierSummaryPayload(SessionPayload):
    outliers_texto: str | None = None
    reincluir_texto: str | None = None


class AvaliacaoPayload(SessionPayload):
    valores_x: dict[str, Any]
    indice_base: str | None = None


class AvaliacaoKnnDetalhesPayload(SessionPayload):
    valores_x: dict[str, Any]


class AvaliacaoDeletePayload(SessionPayload):
    indice: str | None = None
    indice_base: str | None = None


class AvaliacaoBasePayload(SessionPayload):
    indice_base: str | None = None


class ExportModeloPayload(SessionPayload):
    nome_arquivo: str
    elaborador: dict[str, Any] | None = None
    observacao_modelo: str | None = None


class SalvarModeloRepositorioPayload(ExportModeloPayload):
    confirmar_substituicao: bool = False


class UpdateMapaPayload(SessionPayload):
    variavel_mapa: str | None = None
    modo_mapa: str | None = None
    escala_extremo_abs: float | None = None


class ColunaDataMercadoPayload(SessionPayload):
    coluna_data: str


class RepositorioModeloPayload(SessionPayload):
    modelo_id: str


@router.post("/upload")
async def upload_file(
    session_id: str = Form(...),
    file: UploadFile = File(...),
) -> dict[str, Any]:
    session = session_store.get(session_id)
    conteudo = await file.read()
    elaboracao_service.save_uploaded_file(session, file.filename, conteudo)
    return elaboracao_service.load_uploaded_file(session)


@router.get("/repositorio-modelos")
def repositorio_modelos(request: Request) -> dict[str, Any]:
    user = auth_service.require_user(request)
    resposta = elaboracao_service.listar_modelos_repositorio()
    log_event(
        "repositorio",
        "listar_modelos_elaboracao",
        user=user,
        request=request,
        details={"total_modelos": resposta.get("total_modelos")},
    )
    return resposta


@router.post("/repositorio-carregar")
def repositorio_carregar(payload: RepositorioModeloPayload, request: Request) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    user = auth_service.require_user(request)
    resposta = elaboracao_service.carregar_modelo_repositorio(session, payload.modelo_id)
    log_event(
        "repositorio",
        "carregar_modelo_elaboracao",
        user=user,
        session_id=payload.session_id,
        request=request,
        details={"modelo_id": payload.modelo_id},
    )
    return resposta


@router.post("/confirm-sheet")
def confirm_sheet(payload: ConfirmSheetPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.load_uploaded_file(session, selected_sheet=payload.sheet_name)


@router.post("/map-coords")
def map_coords(payload: MapCoordsPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.mapear_coordenadas_manualmente(session, payload.col_lat, payload.col_lon)


@router.post("/geocodificar")
def geocodificar(payload: GeocodePayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.geocodificar(session, payload.col_cdlog, payload.col_num, auto_200=payload.auto_200)


@router.post("/geocodificar-correcoes")
def geocodificar_correcoes(payload: GeocodeCorrecaoPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    correcoes = [item.model_dump() for item in payload.correcoes]
    return elaboracao_service.aplicar_correcoes_geocodificacao(session, correcoes, auto_200=payload.auto_200)


@router.post("/geocodificar-reiniciar")
def geocodificar_reiniciar(payload: SessionPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.reiniciar_geocodificacao(session)


@router.post("/geocodificar-excluir-coords")
def geocodificar_excluir_coords(payload: SessionPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.excluir_coordenadas_para_geocodificacao(session)


@router.post("/apply-selection")
def apply_selection(payload: ApplySelectionPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.apply_selection(
        session,
        coluna_y=payload.coluna_y,
        colunas_x=payload.colunas_x,
        tipo_y=payload.tipo_y,
        coluna_area=payload.coluna_area,
        dicotomicas=payload.dicotomicas,
        codigo_alocado=payload.codigo_alocado,
        percentuais=payload.percentuais,
        outliers_anteriores=payload.outliers_anteriores,
        grau_min_coef=payload.grau_min_coef,
        grau_min_f=payload.grau_min_f,
    )


@router.post("/classify-x")
def classify_x(payload: ClassificarXPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.classificar_tipos_variaveis_x(session, payload.colunas_x)


@router.post("/search-transformations")
def search_transformations(payload: SearchTransformPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.search_transformacoes(
        session,
        grau_min_coef=payload.grau_min_coef,
        grau_min_f=payload.grau_min_f,
        transformacoes_fixas_usuario=payload.transformacoes_fixas,
        transformacao_y_fixa_usuario=payload.transformacao_y_fixa,
    )


@router.post("/adopt-suggestion")
def adopt_suggestion(payload: AdoptSuggestionPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.adotar_sugestao(session, payload.indice)


@router.post("/fit-model")
def fit_model(payload: FitModelPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.fit_model(
        session,
        transformacao_y=payload.transformacao_y,
        transformacoes_x=payload.transformacoes_x,
        dicotomicas=payload.dicotomicas,
        codigo_alocado=payload.codigo_alocado,
        percentuais=payload.percentuais,
    )


@router.post("/model-dispersao")
def model_dispersao(payload: DispersaoPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.gerar_grafico_dispersao_modelo(
        session,
        eixo_x=payload.eixo_x,
        eixo_y_tipo=payload.eixo_y_tipo,
        eixo_y_residuo=payload.eixo_y_residuo,
        eixo_y_coluna=payload.eixo_y_coluna,
    )


@router.post("/dispersao-interativo")
def dispersao_interativo(payload: DispersaoInterativoPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.obter_grafico_dispersao_interativo(session, payload.alvo)


@router.post("/diagnostico-interativo")
def diagnostico_interativo(payload: DiagnosticoInterativoPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.obter_grafico_diagnostico_interativo(session, payload.grafico)


@router.post("/transform-preview")
def transform_preview(payload: TransformPreviewPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.preview_transformacao_manual(
        session,
        transformacao_y=payload.transformacao_y,
        transformacoes_x=payload.transformacoes_x,
    )


@router.post("/outliers/apply-filters")
def outliers_apply_filters(payload: OutlierFilterPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    filtros = [item.model_dump() for item in payload.filtros]
    return elaboracao_service.apply_outlier_filters(session, filtros)


@router.post("/outliers/apply-filters-recursive")
def outliers_apply_filters_recursive(payload: OutlierFilterPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    filtros = [item.model_dump() for item in payload.filtros]
    return elaboracao_service.apply_outlier_filters_recursive(session, filtros)


@router.post("/outliers/restart")
def outliers_restart(payload: OutlierRestartPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.reiniciar_iteracao(
        session,
        outliers_texto=payload.outliers_texto,
        reincluir_texto=payload.reincluir_texto,
        grau_min_coef=payload.grau_min_coef,
        grau_min_f=payload.grau_min_f,
    )


@router.post("/outliers/summary")
def outliers_summary(payload: OutlierSummaryPayload) -> dict[str, str]:
    session = session_store.get(payload.session_id)
    texto = elaboracao_service.resumir_outliers(
        session.outliers_anteriores,
        payload.outliers_texto,
        payload.reincluir_texto,
    )
    return {"resumo": texto}


@router.post("/outliers/clear-history")
def outliers_clear_history(payload: SessionPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.limpar_historico_outliers(session)


@router.post("/evaluation/fields")
def evaluation_fields(payload: SessionPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return {"campos": elaboracao_service.build_campos_avaliacao(session)}


@router.post("/evaluation/calculate")
def evaluation_calculate(payload: AvaliacaoPayload, request: Request) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    user = auth_service.require_user(request)
    resposta = elaboracao_service.calcular_avaliacao_elaboracao(session, payload.valores_x, payload.indice_base)
    log_event(
        "elaboracao",
        "avaliacao_calcular",
        user=user,
        session_id=payload.session_id,
        request=request,
        details={"total_avaliacoes": len(resposta.get("avaliacoes") or [])},
    )
    return resposta


@router.post("/evaluation/knn-details")
def evaluation_knn_details(payload: AvaliacaoKnnDetalhesPayload, request: Request) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    user = auth_service.require_user(request)
    resposta = elaboracao_service.detalhes_knn_avaliacao_elaboracao(session, payload.valores_x)
    log_event(
        "elaboracao",
        "avaliacao_knn_detalhes",
        user=user,
        session_id=payload.session_id,
        request=request,
    )
    return resposta


@router.post("/evaluation/clear")
def evaluation_clear(payload: SessionPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.limpar_avaliacoes_elaboracao(session)


@router.post("/evaluation/delete")
def evaluation_delete(payload: AvaliacaoDeletePayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.excluir_avaliacao_elaboracao(session, payload.indice, payload.indice_base)


@router.post("/evaluation/base")
def evaluation_base(payload: AvaliacaoBasePayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.atualizar_base_avaliacao_elaboracao(session, payload.indice_base)


@router.get("/evaluation/export")
def evaluation_export(session_id: str) -> FileResponse:
    session = session_store.get(session_id)
    caminho = elaboracao_service.exportar_avaliacoes_elaboracao(session)
    return FileResponse(
        path=caminho,
        media_type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
        filename=os.path.basename(caminho),
    )


@router.get("/equation/export")
def equation_export(session_id: str, mode: str = "excel") -> FileResponse:
    session = session_store.get(session_id)
    caminho, nome = elaboracao_service.exportar_equacao(session, mode)
    return FileResponse(
        path=caminho,
        media_type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
        filename=nome,
    )


@router.get("/avaliadores")
def listar_avaliadores() -> dict[str, Any]:
    return {"avaliadores": elaboracao_service.list_avaliadores()}


@router.post("/export-model")
def export_model(payload: ExportModeloPayload, request: Request) -> FileResponse:
    session = session_store.get(payload.session_id)
    caminho, _ = elaboracao_service.exportar_modelo(
        session,
        payload.nome_arquivo,
        elaborador=payload.elaborador,
        observacao_modelo=payload.observacao_modelo,
    )
    user = auth_service.require_user(request)
    log_event(
        "elaboracao",
        "exportar_modelo",
        user=user,
        session_id=payload.session_id,
        request=request,
        details={"nome_arquivo": os.path.basename(caminho)},
    )
    return FileResponse(
        path=caminho,
        media_type="application/octet-stream",
        filename=os.path.basename(caminho),
    )


@router.post("/save-model-repository")
def save_model_repository(payload: SalvarModeloRepositorioPayload, request: Request) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    user = auth_service.require_admin(request)
    resposta = elaboracao_service.salvar_modelo_repositorio(
        session,
        payload.nome_arquivo,
        elaborador=payload.elaborador,
        observacao_modelo=payload.observacao_modelo,
        actor=user.get("usuario"),
        confirmar_substituicao=payload.confirmar_substituicao,
    )
    log_event(
        "repositorio",
        "salvar_modelo_repositorio_elaboracao",
        user=user,
        session_id=payload.session_id,
        request=request,
        details={
            "nome_arquivo": payload.nome_arquivo,
            "confirmar_substituicao": bool(payload.confirmar_substituicao),
            "substituidos": resposta.get("resultado_upload", {}).get("substituidos", []),
        },
    )
    return resposta


@router.get("/export-base")
def export_base(session_id: str, filtered: bool = True) -> FileResponse:
    session = session_store.get(session_id)
    caminho = elaboracao_service.exportar_base(session, usar_filtrado=filtered)
    return FileResponse(
        path=caminho,
        media_type="text/csv",
        filename=os.path.basename(caminho),
    )


@router.post("/map/update")
def map_update(payload: UpdateMapaPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.atualizar_mapa(session, payload.variavel_mapa, payload.modo_mapa)


@router.post("/residuos/map/update")
def residuos_map_update(payload: UpdateMapaPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.atualizar_mapa_residuos(
        session,
        payload.variavel_mapa,
        payload.modo_mapa,
        payload.escala_extremo_abs,
    )


@router.post("/market-date/preview")
def market_date_preview(payload: ColunaDataMercadoPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.previsualizar_coluna_data_mercado(session, payload.coluna_data)


@router.post("/market-date/apply")
def market_date_apply(payload: ColunaDataMercadoPayload) -> dict[str, Any]:
    session = session_store.get(payload.session_id)
    return elaboracao_service.aplicar_coluna_data_mercado(session, payload.coluna_data)


@router.get("/context")
def context(session_id: str) -> dict[str, Any]:
    session = session_store.get(session_id)
    return {
        "coluna_y": session.coluna_y,
        "tipo_y": session.tipo_y,
        "coluna_area": session.coluna_area,
        "colunas_area_candidatas": elaboracao_service.detectar_colunas_area(session.df_original) if session.df_original is not None else [],
        "colunas_x": session.colunas_x,
        "dicotomicas": session.dicotomicas,
        "codigo_alocado": session.codigo_alocado,
        "percentuais": session.percentuais,
        "outliers_anteriores": session.outliers_anteriores,
        "iteracao": session.iteracao,
        "coluna_data_mercado": session.coluna_data_mercado,
        "periodo_dados_mercado": {
            "coluna_data": session.coluna_data_mercado,
            "data_inicial": session.periodo_dados_mercado_inicio,
            "data_final": session.periodo_dados_mercado_fim,
        },
    }