package api

import (
	"database/sql"
	"net/http"

	"github.com/gin-gonic/gin"
	"github.com/yourusername/victorialogs-manager/internal/config"
)

// NewRouter creates and configures the main router
func NewRouter(cfg *config.Config, db *sql.DB) *gin.Engine {
	// Set Gin mode
	gin.SetMode(gin.ReleaseMode)

	router := gin.Default()

	// CORS middleware
	router.Use(corsMiddleware())

	// Health check endpoint
	router.GET("/health", func(c *gin.Context) {
		c.JSON(http.StatusOK, gin.H{
			"status": "ok",
			"service": "victorialogs-manager",
		})
	})

	// API v1 routes
	v1 := router.Group("/api/v1")
	{
		// Authentication routes (public)
		auth := v1.Group("/auth")
		{
			auth.POST("/login", func(c *gin.Context) {
				// TODO: Implement login handler
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			auth.POST("/refresh", func(c *gin.Context) {
				// TODO: Implement refresh handler
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			auth.GET("/me", func(c *gin.Context) {
				// TODO: Implement me handler (requires auth)
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
		}

		// Protected routes (require authentication)
		// TODO: Add auth middleware here

		// User management routes
		users := v1.Group("/users")
		{
			users.GET("", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			users.POST("", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			users.GET("/:id", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			users.PUT("/:id", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			users.DELETE("/:id", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
		}

		// Log querying routes
		logs := v1.Group("/logs")
		{
			logs.POST("/query", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			logs.POST("/tail", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			logs.GET("/facets", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			logs.POST("/stats", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			logs.POST("/export", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
		}

		// Alert management routes
		alerts := v1.Group("/alerts")
		{
			alerts.GET("/rules", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			alerts.POST("/rules", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			alerts.GET("/rules/:id", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			alerts.PUT("/rules/:id", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			alerts.DELETE("/rules/:id", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			alerts.POST("/reload", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			alerts.GET("/active", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
		}

		// Pattern detection routes
		patterns := v1.Group("/patterns")
		{
			patterns.GET("", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			patterns.POST("", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			patterns.PUT("/:id", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			patterns.DELETE("/:id", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			patterns.POST("/detect", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			patterns.POST("/ml/train", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			patterns.POST("/ml/detect", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
		}

		// Report routes
		reports := v1.Group("/reports")
		{
			reports.GET("", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			reports.POST("", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			reports.GET("/:id", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			reports.PUT("/:id", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			reports.DELETE("/:id", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
			reports.POST("/:id/execute", func(c *gin.Context) {
				c.JSON(http.StatusNotImplemented, gin.H{"message": "not implemented yet"})
			})
		}
	}

	return router
}

// corsMiddleware handles CORS headers
func corsMiddleware() gin.HandlerFunc {
	return func(c *gin.Context) {
		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
		c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
		c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT, DELETE")

		if c.Request.Method == "OPTIONS" {
			c.AbortWithStatus(204)
			return
		}

		c.Next()
	}
}