package handlers

import (
	"context"
	"fmt"
	"strconv"
	"time"

	"github.com/SamuelTariku/FortuneBet-Backend/internal/domain"
	"github.com/gofiber/fiber/v2"
)

// GetDashboardReport returns a comprehensive dashboard report
// @Summary Get dashboard report
// @Description Returns a comprehensive dashboard report with key metrics
// @Tags Reports
// @Accept json
// @Produce json
// @Param company_id query int false "Company ID filter"
// @Param branch_id query int false "Branch ID filter"
// @Param user_id query int false "User ID filter"
// @Param start_time query string false "Start time filter (RFC3339 format)"
// @Param end_time query string false "End time filter (RFC3339 format)"
// @Param sport_id query string false "Sport ID filter"
// @Param status query int false "Status filter (0=Pending, 1=Win, 2=Loss, 3=Half, 4=Void, 5=Error)"
// @Security ApiKeyAuth
// @Success 200 {object} report.DashboardSummary
// @Failure 400 {object} domain.ErrorResponse
// @Failure 401 {object} domain.ErrorResponse
// @Failure 500 {object} domain.ErrorResponse
// @Router /api/v1/reports/dashboard [get]
func (h *Handler) GetDashboardReport(c *fiber.Ctx) error {
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	// Parse query parameters
	filter, err := parseReportFilter(c)
	if err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(domain.ErrorResponse{
			Message: "Invalid filter parameters",
			Error:   err.Error(),
		})
	}

	// Get report data
	summary, err := h.reportSvc.GetDashboardSummary(ctx, filter)
	if err != nil {
		h.logger.Error("failed to get dashboard report", "error", err)
		return c.Status(fiber.StatusInternalServerError).JSON(domain.ErrorResponse{
			Message: "Failed to generate report",
			Error:   err.Error(),
		})
	}

	return c.Status(fiber.StatusOK).JSON(summary)
}

// parseReportFilter parses query parameters into ReportFilter
func parseReportFilter(c *fiber.Ctx) (domain.ReportFilter, error) {
	var filter domain.ReportFilter
	var err error

	if c.Query("company_id") != "" {
		companyID, err := strconv.ParseInt(c.Query("company_id"), 10, 64)
		if err != nil {
			return domain.ReportFilter{}, fmt.Errorf("invalid company_id: %w", err)
		}
		filter.CompanyID = domain.ValidInt64{Value: companyID, Valid: true}
	}

	if c.Query("branch_id") != "" {
		branchID, err := strconv.ParseInt(c.Query("branch_id"), 10, 64)
		if err != nil {
			return domain.ReportFilter{}, fmt.Errorf("invalid branch_id: %w", err)
		}
		filter.BranchID = domain.ValidInt64{Value: branchID, Valid: true}
	}

	if c.Query("user_id") != "" {
		userID, err := strconv.ParseInt(c.Query("user_id"), 10, 64)
		if err != nil {
			return domain.ReportFilter{}, fmt.Errorf("invalid user_id: %w", err)
		}
		filter.UserID = domain.ValidInt64{Value: userID, Valid: true}
	}

	if c.Query("start_time") != "" {
		startTime, err := time.Parse(time.RFC3339, c.Query("start_time"))
		if err != nil {
			return domain.ReportFilter{}, fmt.Errorf("invalid start_time: %w", err)
		}
		filter.StartTime = domain.ValidTime{Value: startTime, Valid: true}
	}

	if c.Query("end_time") != "" {
		endTime, err := time.Parse(time.RFC3339, c.Query("end_time"))
		if err != nil {
			return domain.ReportFilter{}, fmt.Errorf("invalid end_time: %w", err)
		}
		filter.EndTime = domain.ValidTime{Value: endTime, Valid: true}
	}

	if c.Query("sport_id") != "" {
		filter.SportID = domain.ValidString{Value: c.Query("sport_id"), Valid: true}
	}

	if c.Query("status") != "" {
		status, err := strconv.ParseInt(c.Query("status"), 10, 32)
		if err != nil {
			return domain.ReportFilter{}, fmt.Errorf("invalid status: %w", err)
		}
		filter.Status = domain.ValidOutcomeStatus{Value: domain.OutcomeStatus(status), Valid: true}
	}

	return filter, err
}