package handlers

import (
	"github.com/gofiber/fiber/v3"
	"gorm.io/gorm"

	"optoant/config"
)

// HealthResponse is the structure returned by the /health endpoint.
type HealthResponse struct {
	Status   string `json:"status"`
	Database string `json:"database"`
	Config   struct {
		OpenAIBackend string `json:"openai_backend"`
		Port          string `json:"port"`
	} `json:"config"`
}

// HealthHandler returns service status and basic config info.
// @Summary      Health check
// @Description  Returns service health status, database connectivity, and active configuration.
// @Tags         health
// @Produce      json
// @Success      200  {object}  HealthResponse
// @Router       /health [get]
func HealthHandler(cfg *config.Config, db *gorm.DB) fiber.Handler {
	return func(c fiber.Ctx) error {
		resp := HealthResponse{
			Status: "ok",
		}
		resp.Config.OpenAIBackend = cfg.OpenAIBackend
		resp.Config.Port = cfg.Port

		// Check DB connectivity
		if db != nil {
			sqlDB, err := db.DB()
			if err != nil || sqlDB.Ping() != nil {
				resp.Database = "unreachable"
			} else {
				resp.Database = "ok"
			}
		} else {
			resp.Database = "disabled"
		}

		return c.JSON(resp)
	}
}