package api

import (
	"fmt"
	"net/http"

	"git.jnss.me/joakim/opal/internal/api/handlers"
	"github.com/go-chi/chi/v5"
	"github.com/go-chi/chi/v5/middleware"
)

// Server represents the API server
type Server struct {
	router  chi.Router
	addr    string
	devMode bool
}

// NewServer creates a new API server
func NewServer(addr string, devMode bool) *Server {
	s := &Server{
		router:  chi.NewRouter(),
		addr:    addr,
		devMode: devMode,
	}
	s.setupRoutes()
	return s
}

// setupRoutes configures all API routes
func (s *Server) setupRoutes() {
	r := s.router

	// Global middleware
	r.Use(middleware.Logger)
	r.Use(middleware.Recoverer)
	r.Use(CORSMiddleware())

	// Health check (no auth required)
	r.Get("/health", func(w http.ResponseWriter, r *http.Request) {
		JSON(w, http.StatusOK, map[string]string{"status": "ok"})
	})

	if s.devMode {
		// Dev mode: fake session endpoint so the frontend can "log in"
		r.Get("/auth/dev-session", func(w http.ResponseWriter, r *http.Request) {
			JSON(w, http.StatusOK, map[string]interface{}{
				"access_token":  "dev-token",
				"refresh_token": "",
				"expires_at":    9999999999,
				"token_type":    "bearer",
				"user": map[string]interface{}{
					"id":       1,
					"username": "dev",
					"email":    "dev@localhost",
				},
			})
		})
	} else {
		// OAuth endpoints (no auth required)
		r.Get("/auth/login", handlers.GetLoginURL)
		r.Get("/auth/callback", handlers.OAuthCallback)
		r.Post("/auth/callback", handlers.OAuthCallback)
		r.Post("/auth/refresh", handlers.RefreshToken)
		r.Post("/auth/logout", handlers.Logout)
	}

	// Protected routes
	r.Group(func(r chi.Router) {
		if s.devMode {
			r.Use(DevAuthMiddleware())
		} else {
			r.Use(AuthMiddleware())
		}

		// Tasks
		r.Route("/tasks", func(r chi.Router) {
			r.Get("/", handlers.ListTasks)
			r.Post("/", handlers.CreateTask)
			r.Post("/parse", handlers.ParseTask)
			r.Get("/{uuid}", handlers.GetTask)
			r.Put("/{uuid}", handlers.UpdateTask)
			r.Delete("/{uuid}", handlers.DeleteTask)
			r.Post("/{uuid}/complete", handlers.CompleteTask)
			r.Post("/{uuid}/start", handlers.StartTask)
			r.Post("/{uuid}/stop", handlers.StopTask)

			// Tags
			r.Get("/{uuid}/tags", handlers.GetTaskTags)
			r.Post("/{uuid}/tags", handlers.AddTaskTag)
			r.Delete("/{uuid}/tags/{tag}", handlers.RemoveTaskTag)
		})

		// Metadata
		r.Get("/tags", handlers.ListAllTags)
		r.Get("/projects", handlers.ListProjects)

		// Sync endpoints
		r.Post("/sync/changes", handlers.GetChanges)
		r.Post("/sync/push", handlers.PushChanges)

		// Key management
		r.Get("/auth/keys", handlers.ListAPIKeys)
		r.Delete("/auth/keys/{id}", handlers.RevokeAPIKey)
	})
}

// Start starts the HTTP server
func (s *Server) Start() error {
	fmt.Printf("Starting opal API server on %s\n", s.addr)
	return http.ListenAndServe(s.addr, s.router)
}