package touka

import (
	"net/http"
	"testing"
)

func TestHandleRequestRedirectFixedPath(t *testing.T) {
	engine := New()
	engine.GET("/api/v1/users/:id/settings", func(c *Context) {
		c.Status(http.StatusNoContent)
	})

	rr := PerformRequest(engine, http.MethodGet, "/API/V1/USERS/123/SETTINGS", nil, nil)
	if rr.Code != http.StatusMovedPermanently {
		t.Fatalf("expected fixed-path redirect status %d, got %d", http.StatusMovedPermanently, rr.Code)
	}
	if location := rr.Header().Get("Location"); location != "/api/v1/users/123/settings" {
		t.Fatalf("expected fixed-path redirect location %q, got %q", "/api/v1/users/123/settings", location)
	}
}

func TestHandleRequestSkipsFixedPathLookupForLowercaseMiss(t *testing.T) {
	engine := New()
	engine.GET("/api/v1/users/:id/settings", func(c *Context) {
		c.Status(http.StatusNoContent)
	})

	rr := PerformRequest(engine, http.MethodGet, "/does/not/exist", nil, nil)
	if rr.Code != http.StatusNotFound {
		t.Fatalf("expected lowercase miss to stay as 404, got %d", rr.Code)
	}
}

func TestHandleRequestKeepsFixedPathLookupForUppercaseMiss(t *testing.T) {
	engine := New()
	engine.GET("/Users/Profile", func(c *Context) {
		c.Status(http.StatusNoContent)
	})

	rr := PerformRequest(engine, http.MethodGet, "/users/profile", nil, nil)
	if rr.Code != http.StatusMovedPermanently {
		t.Fatalf("expected uppercase route miss to trigger fixed-path redirect, got %d", rr.Code)
	}
	if location := rr.Header().Get("Location"); location != "/Users/Profile" {
		t.Fatalf("expected uppercase route redirect location %q, got %q", "/Users/Profile", location)
	}
}

func TestNoRouteCanContinueToDefaultNotFound(t *testing.T) {
	engine := New()
	engine.NoRoute(func(c *Context) {
		c.Writer.Header().Set("X-NoRoute", "hit")
		c.Next()
	})

	rr := PerformRequest(engine, http.MethodGet, "/missing", nil, nil)
	if rr.Code != http.StatusNotFound {
		t.Fatalf("expected default not found status %d, got %d", http.StatusNotFound, rr.Code)
	}
	if got := rr.Header().Get("X-NoRoute"); got != "hit" {
		t.Fatalf("expected NoRoute middleware header to be preserved, got %q", got)
	}
}

func TestMethodNotAllowedDoesNotContinueToNoRoute(t *testing.T) {
	engine := New()
	engine.GET("/users", func(c *Context) {
		c.Status(http.StatusNoContent)
	})
	engine.NoRoute(func(c *Context) {
		c.Writer.Header().Set("X-NoRoute", "hit")
		c.Next()
	})

	rr := PerformRequest(engine, http.MethodDelete, "/users", nil, nil)
	if rr.Code != http.StatusMethodNotAllowed {
		t.Fatalf("expected method not allowed status %d, got %d", http.StatusMethodNotAllowed, rr.Code)
	}
	if got := rr.Header().Get("X-NoRoute"); got != "" {
		t.Fatalf("expected NoRoute chain to be skipped after 405, got header %q", got)
	}
}

func TestOptionsAllowHeaderListsMatchingMethods(t *testing.T) {
	engine := New()
	engine.GET("/users", func(c *Context) {
		c.Status(http.StatusNoContent)
	})
	engine.POST("/users", func(c *Context) {
		c.Status(http.StatusNoContent)
	})

	rr := PerformRequest(engine, http.MethodOptions, "/users", nil, nil)
	if rr.Code != http.StatusOK {
		t.Fatalf("expected OPTIONS allow status %d, got %d", http.StatusOK, rr.Code)
	}
	allow := rr.Header().Get("Allow")
	if allow != "GET, POST" && allow != "POST, GET" {
		t.Fatalf("expected Allow header to list matching methods, got %q", allow)
	}
}