package agenda

import (
	"context"
	"fmt"
	"net/http"

	"github.com/gin-gonic/gin"
	"github.com/google/uuid"
	"github.com/jackc/pgx/v5/pgtype"
)

type Handler struct {
	service *Service
}

func NewHandler(service *Service) *Handler {
	return &Handler{service: service}
}

// Create godoc
// @Summary      Create a new agenda event
// @Description  Create a new agenda event
// @Tags         agenda
// @Accept       json
// @Produce      json
// @Param        request body CreateAgendaRequest true "Create Agenda Request"
// @Success      201  {object}  map[string]interface{}
// @Failure      400  {object}  map[string]string
// @Failure      500  {object}  map[string]string
// @Router       /api/agenda [post]
func (h *Handler) Create(c *gin.Context) {
	var req CreateAgendaRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Dados inválidos: " + err.Error()})
		return
	}

	// Security: Block RESEARCHER
	if c.GetString("role") == "RESEARCHER" {
		c.JSON(http.StatusForbidden, gin.H{"error": "Acesso negado: Somente leitura"})
		return
	}

	userIDStr := c.GetString("userID")
	userID, err := uuid.Parse(userIDStr)
	if err != nil {
		c.JSON(http.StatusUnauthorized, gin.H{"error": "Usuário não autenticado"})
		return
	}

	regiao := c.GetString("regiao")
	agenda, err := h.service.Create(c.Request.Context(), userID, req, regiao)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao criar agenda: " + err.Error()})
		return
	}

	c.JSON(http.StatusCreated, agenda)
}

// List godoc
// @Summary      List all agenda events
// @Description  List all agenda events with details
// @Tags         agenda
// @Accept       json
// @Produce      json
// @Success      200  {array}   map[string]interface{}
// @Failure      500  {object}  map[string]string
// @Router       /api/agenda [get]
func (h *Handler) List(c *gin.Context) {
	userIDStr := c.GetString("userID")
	role := c.GetString("role")
	userID, _ := uuid.Parse(userIDStr)

	regiao := c.GetString("regiao")
	agendas, err := h.service.List(c.Request.Context(), userID, role, regiao)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao listar agendas: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, agendas)
}

// Get godoc
// @Summary      Get agenda event by ID
// @Description  Get agenda event details by ID
// @Tags         agenda
// @Accept       json
// @Produce      json
// @Param        id   path      string  true  "Agenda ID"
// @Success      200  {object}  map[string]interface{}
// @Failure      400  {object}  map[string]string
// @Failure      500  {object}  map[string]string
// @Router       /api/agenda/{id} [get]
func (h *Handler) Get(c *gin.Context) {
	idParam := c.Param("id")
	id, err := uuid.Parse(idParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID inválido: " + err.Error()})
		return
	}

	regiao := c.GetString("regiao")
	agenda, err := h.service.Get(c.Request.Context(), id, regiao)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao buscar agenda: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, agenda)
}

// Update godoc
// @Summary      Update agenda event
// @Description  Update agenda event by ID
// @Tags         agenda
// @Accept       json
// @Produce      json
// @Param        id   path      string  true  "Agenda ID"
// @Param        request body CreateAgendaRequest true "Update Agenda Request"
// @Success      200  {object}  map[string]interface{}
// @Failure      400  {object}  map[string]string
// @Failure      500  {object}  map[string]string
// @Router       /api/agenda/{id} [put]
func (h *Handler) Update(c *gin.Context) {
	idParam := c.Param("id")
	id, err := uuid.Parse(idParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID inválido: " + err.Error()})
		return
	}

	var req CreateAgendaRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Dados inválidos: " + err.Error()})
		return
	}

	// Security: Block RESEARCHER
	if c.GetString("role") == "RESEARCHER" {
		c.JSON(http.StatusForbidden, gin.H{"error": "Acesso negado: Somente leitura"})
		return
	}

	fmt.Printf("Update Payload: %+v\n", req)

	regiao := c.GetString("regiao")
	agenda, err := h.service.Update(c.Request.Context(), id, req, regiao)
	if err != nil {
		fmt.Printf("Update Error for ID %s: %v\n", id, err)
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao atualizar agenda: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, agenda)
}

// Delete godoc
// @Summary      Delete agenda event
// @Description  Delete agenda event by ID
// @Tags         agenda
// @Accept       json
// @Produce      json
// @Param        id   path      string  true  "Agenda ID"
// @Success      204  {object}  nil
// @Failure      400  {object}  map[string]string
// @Failure      500  {object}  map[string]string
// @Router       /api/agenda/{id} [delete]
func (h *Handler) Delete(c *gin.Context) {
	idParam := c.Param("id")
	id, err := uuid.Parse(idParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID inválido: " + err.Error()})
		return
	}

	regiao := c.GetString("regiao")
	if err := h.service.Delete(c.Request.Context(), id, regiao); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao deletar agenda: " + err.Error()})
		return
	}

	c.Status(http.StatusNoContent)
}

// AssignProfessional godoc
// @Summary      Assign professional to agenda
// @Tags         agenda
// @Router       /api/agenda/{id}/professionals [post]
func (h *Handler) AssignProfessional(c *gin.Context) {
	idParam := c.Param("id")
	agendaID, err := uuid.Parse(idParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de agenda inválido"})
		return
	}

	var req struct {
		ProfessionalID string  `json:"professional_id" binding:"required"`
		FuncaoID       *string `json:"funcao_id"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Dados inválidos: " + err.Error()})
		return
	}

	if idParam == "" {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID inválido"})
		return
	}

	// Security: Block RESEARCHER
	if c.GetString("role") == "RESEARCHER" {
		c.JSON(http.StatusForbidden, gin.H{"error": "Acesso negado: Somente leitura"})
		return
	}

	profID, err := uuid.Parse(req.ProfessionalID)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de profissional inválido"})
		return
	}

	var funcaoID *uuid.UUID
	if req.FuncaoID != nil && *req.FuncaoID != "" {
		if parsed, err := uuid.Parse(*req.FuncaoID); err == nil {
			funcaoID = &parsed
		}
	}

	regiao := c.GetString("regiao")
	if err := h.service.AssignProfessional(c.Request.Context(), agendaID, profID, funcaoID, regiao); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao atribuir profissional: " + err.Error()})
		return
	}

	c.Status(http.StatusOK)
}

// RemoveProfessional godoc
// @Summary      Remove professional from agenda
// @Tags         agenda
// @Router       /api/agenda/{id}/professionals/{profId} [delete]
func (h *Handler) RemoveProfessional(c *gin.Context) {
	idParam := c.Param("id")
	agendaID, err := uuid.Parse(idParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de agenda inválido"})
		return
	}

	profIdParam := c.Param("profId")
	profID, err := uuid.Parse(profIdParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de profissional inválido"})
		return
	}

	// Security: Block RESEARCHER
	if c.GetString("role") == "RESEARCHER" {
		c.JSON(http.StatusForbidden, gin.H{"error": "Acesso negado: Somente leitura"})
		return
	}

	if err := h.service.RemoveProfessional(c.Request.Context(), agendaID, profID); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao remover profissional: " + err.Error()})
		return
	}

	c.Status(http.StatusNoContent)
}

// GetProfessionals godoc
// @Summary      Get professionals assigned to agenda
// @Tags         agenda
// @Router       /api/agenda/{id}/professionals [get]

func (h *Handler) GetProfessionals(c *gin.Context) {
	idParam := c.Param("id")
	agendaID, err := uuid.Parse(idParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de agenda inválido"})
		return
	}

	profs, err := h.service.GetAgendaProfessionals(c.Request.Context(), agendaID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao buscar profissionais: " + err.Error()})
		return
	}

	// Security: Mask data for RESEARCHER
	if c.GetString("role") == "RESEARCHER" {
		for i := range profs {
			// Set sensitive fields to generic or empty values
			// Using generated struct pointers or values?
			// generated.GetAgendaProfessionalsRow has fields like Email (pgtype.Text)
			// We can override them.
			// Note: 'profs' is a slice of structs, we iterate by index to modify.

			// Mask Email
			profs[i].Email = pgtype.Text{String: "bloqueado@acesso.restrito", Valid: true}

			// Mask Phone/Whatsapp if available in struct
			// Checking struct definition... list includes p.*
			// p (CadastroProfissionais) has Whatsapp, CpfCnpjTitular, Banco, Agencia, ContaPix

			profs[i].Whatsapp = pgtype.Text{String: "Bloqueado", Valid: true}

			profs[i].CpfCnpjTitular = pgtype.Text{String: "***", Valid: true}

			profs[i].Banco = pgtype.Text{String: "***", Valid: true}

			profs[i].Agencia = pgtype.Text{String: "***", Valid: true}

			profs[i].ContaPix = pgtype.Text{String: "***", Valid: true}
		}
	}

	c.JSON(http.StatusOK, profs)
}

// UpdateStatus godoc
// @Summary      Update agenda status
// @Tags         agenda
// @Router       /api/agenda/{id}/status [patch]
func (h *Handler) UpdateStatus(c *gin.Context) {
	idParam := c.Param("id")
	agendaID, err := uuid.Parse(idParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de agenda inválido"})
		return
	}

	var req struct {
		Status string `json:"status" binding:"required"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Dados inválidos: " + err.Error()})
		return
	}

	regiao := c.GetString("regiao")
	agenda, err := h.service.UpdateStatus(c.Request.Context(), agendaID, req.Status, regiao)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao atualizar status: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, agenda)
}

// UpdateAssignmentStatus godoc
// @Summary      Update professional assignment status
// @Tags         agenda
// @Router       /api/agenda/{id}/professionals/{profId}/status [patch]
func (h *Handler) UpdateAssignmentStatus(c *gin.Context) {
	idParam := c.Param("id")
	agendaID, err := uuid.Parse(idParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de agenda inválido"})
		return
	}

	profIdParam := c.Param("profId")
	profID, err := uuid.Parse(profIdParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de profissional inválido"})
		return
	}

	var req struct {
		Status string `json:"status" binding:"required"`
		Reason string `json:"reason"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Dados inválidos: " + err.Error()})
		return
	}

	regiao := c.GetString("regiao")
	if err := h.service.UpdateAssignmentStatus(c.Request.Context(), agendaID, profID, req.Status, req.Reason, regiao); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao atualizar status: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"status": "success"})
}

// UpdateAssignmentPosition godoc
// @Summary      Update professional position in agenda
// @Tags         agenda
// @Router       /api/agenda/{id}/professionals/{profId}/position [patch]
func (h *Handler) UpdateAssignmentPosition(c *gin.Context) {
	idParam := c.Param("id")
	agendaID, err := uuid.Parse(idParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de agenda inválido"})
		return
	}

	profIdParam := c.Param("profId")
	profID, err := uuid.Parse(profIdParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de profissional inválido"})
		return
	}

	var req struct {
		Posicao string `json:"posicao" binding:"required"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Dados inválidos: " + err.Error()})
		return
	}

	if err := h.service.UpdateAssignmentPosition(c.Request.Context(), agendaID, profID, req.Posicao); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao atualizar posição: " + err.Error()})
		return
	}

	c.Status(http.StatusOK)
}

// ListAvailableProfessionals godoc
// @Summary      List available professionals for agenda date
// @Tags         agenda
// @Router       /api/agenda/{id}/available [get]
func (h *Handler) ListAvailableProfessionals(c *gin.Context) {
	idParam := c.Param("id")
	agendaID, err := uuid.Parse(idParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de agenda inválido"})
		return
	}

	// Fetch agenda to get date
	regiao := c.GetString("regiao")
	agenda, err := h.service.Get(c.Request.Context(), agendaID, regiao)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao buscar agenda: " + err.Error()})
		return
	}

	// Check if date is valid
	if !agenda.DataEvento.Valid {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Agenda sem data definida"})
		return
	}

	profs, err := h.service.ListAvailableProfessionals(c.Request.Context(), agenda.DataEvento.Time, regiao)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao buscar profissionais disponíveis: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, profs)
}

// GetProfessionalFinancialStatement godoc
// @Summary      Get professional financial statement
// @Description  Get financial statement for the logged-in professional
// @Tags         agenda
// @Accept       json
// @Produce      json
// @Success      200  {object}  FinancialStatementResponse
// @Failure      401  {object}  map[string]string
// @Failure      500  {object}  map[string]string
// @Router       /api/professionals/me/financial-statement [get]
func (h *Handler) GetProfessionalFinancialStatement(c *gin.Context) {
	userIDStr := c.GetString("userID")
	userID, err := uuid.Parse(userIDStr)
	if err != nil {
		c.JSON(http.StatusUnauthorized, gin.H{"error": "Usuário não autenticado"})
		return
	}

	statement, err := h.service.GetProfessionalFinancialStatement(c.Request.Context(), userID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao buscar extrato: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, statement)
}

// NotifyLogistics godoc
// @Summary      Send logistics notification to all professionals
// @Tags         agenda
// @Router       /api/agenda/{id}/notify-logistics [post]
func (h *Handler) NotifyLogistics(c *gin.Context) {
	idParam := c.Param("id")
	agendaID, err := uuid.Parse(idParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de agenda inválido"})
		return
	}

	// Async or Sync? User wants visual feedback "Liberar o gatilho".
	// We can do it sync to return "Success" only after initiation, or async.
	// Service.NotifyLogistics is currently synchronous (except the internal async parts? No, I copied it as sync loop).
	// Wait, I removed the `go func()` wrapper in the extraction, so the loop runs in the caller's goroutine.
	// But `UpdateStatus` calls it with `go s.NotifyLogistics(...)`.
	// For this endpoint, we might want to return quickly.
	// But returning success implies "Notification Sent".
	// Let's run it in background for speed.

	var req struct {
		PassengerOrders map[string]map[string]int `json:"passenger_orders"`
	}
	_ = c.ShouldBindJSON(&req)

	// Security: Block RESEARCHER
	if c.GetString("role") == "RESEARCHER" {
		c.JSON(http.StatusForbidden, gin.H{"error": "Acesso negado: Somente leitura"})
		return
	}

	regiao := c.GetString("regiao")
	go h.service.NotifyLogistics(context.Background(), agendaID, req.PassengerOrders, regiao)

	c.JSON(http.StatusOK, gin.H{"message": "Notificação de logística iniciada com sucesso."})
}

// Import godoc
// @Summary      Import agenda events from Excel/JSON
// @Tags         agenda
// @Router       /api/import/agenda [post]
func (h *Handler) Import(c *gin.Context) {
	var req []ImportAgendaRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Dados inválidos: " + err.Error()})
		return
	}

	userIDStr := c.GetString("userID")
	userID, err := uuid.Parse(userIDStr)
	if err != nil {
		c.JSON(http.StatusUnauthorized, gin.H{"error": "Usuário não autenticado"})
		return
	}

	regiao := c.GetString("regiao")
	if err := h.service.ImportAgenda(c.Request.Context(), userID, req, regiao); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao importar agenda: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "Agenda importada com sucesso"})
}

// SetCoordinator godoc
// @Summary      Set professional as coordinator
// @Tags         agenda
// @Router       /api/agenda/{id}/professionals/{profId}/coordinator [put]
func (h *Handler) SetCoordinator(c *gin.Context) {
	idParam := c.Param("id")
	agendaID, err := uuid.Parse(idParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de agenda inválido"})
		return
	}

	profIdParam := c.Param("profId")
	profID, err := uuid.Parse(profIdParam)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "ID de profissional inválido"})
		return
	}

	var req struct {
		IsCoordinator bool `json:"is_coordinator"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Dados inválidos: " + err.Error()})
		return
	}

	// Security: Block RESEARCHER
	if c.GetString("role") == "RESEARCHER" {
		c.JSON(http.StatusForbidden, gin.H{"error": "Acesso negado: Somente leitura"})
		return
	}

	// regiao := c.GetString("regiao") // Not needed for SetCoordinator
	if err := h.service.SetCoordinator(c.Request.Context(), agendaID, profID, req.IsCoordinator); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Erro ao definir coordenador: " + err.Error()})
		return
	}

	c.Status(http.StatusOK)
}

// ToggleFinalizada godoc
// @Summary      Toggle FOT finalized status
// @Tags         agenda
// @Router       /api/fots/{id}/finalize [post]