// Package api wires together the HTTP router and all handlers.
package api

import (
	"net/http"

	"github.com/go-chi/chi/v5"
	"github.com/go-chi/chi/v5/middleware"
	"github.com/go-chi/cors"
	"github.com/jackc/pgx/v5/pgxpool"
	"github.com/yourname/deflated/internal/db"
)

// NewRouter builds the full Chi router with middleware and all routes.
// This is the only place routes are registered — easy to see the full API shape.
func NewRouter(pool *pgxpool.Pool) http.Handler {
	queries := db.NewQueries(pool)
	h := &handlers{q: queries}

	r := chi.NewRouter()

	// ── Middleware stack ────────────────────────────────────────────────────
	r.Use(middleware.RequestID)   // adds X-Request-Id header
	r.Use(middleware.RealIP)      // reads X-Forwarded-For
	r.Use(middleware.Logger)      // logs every request: method, path, status, latency
	r.Use(middleware.Recoverer)   // catches panics, returns 500 instead of crashing

	r.Use(cors.Handler(cors.Options{
		AllowedOrigins: []string{"http://localhost:3000", "https://deflated.fyi"},
		AllowedMethods: []string{"GET", "POST", "OPTIONS"},
		AllowedHeaders: []string{"Accept", "Content-Type"},
	}))

	// ── Routes ──────────────────────────────────────────────────────────────
	r.Get("/health", h.health)

	r.Route("/api", func(r chi.Router) {
		// Receipt submission
		r.Post("/receipts", h.submitReceipt)
		r.Get("/receipts/{id}", h.getReceipt)

		// Price data for the dashboard
		r.Get("/items/{name}/history", h.getPriceHistory) // ?months=24
		r.Get("/items/movers", h.getTopMovers)            // ?limit=10

		// The torn dollar bill — purchasing power over time
		r.Get("/inflation/summary", h.getInflationSummary) // ?from=2009-01&to=2025-01
	})

	return r
}