package openresty

import (
	"strings"
	"testing"
)

func TestRenderPagesAPIProxyLocationBlock(t *testing.T) {
	tests := []struct {
		name       string
		deployment *PagesDeployment
		expected   []string
		unexpected []string
	}{
		{
			name:       "nil deployment",
			deployment: nil,
			expected:   []string{""},
		},
		{
			name: "disabled proxy",
			deployment: &PagesDeployment{
				APIProxyEnabled: false,
				APIProxyPath:    "/api",
				APIProxyPass:    "http://127.0.0.1:8080",
			},
			expected: []string{""},
		},
		{
			name: "enabled proxy without rewrite",
			deployment: &PagesDeployment{
				APIProxyEnabled: true,
				APIProxyPath:    "/api",
				APIProxyPass:    "http://127.0.0.1:8080",
				APIProxyRewrite: "",
			},
			expected: []string{
				"location /api {",
				"proxy_pass http://127.0.0.1:8080;",
				"proxy_http_version 1.1;",
				"proxy_set_header Host $http_host;",
			},
			unexpected: []string{
				"rewrite",
			},
		},
		{
			name: "enabled proxy with rewrite to root",
			deployment: &PagesDeployment{
				APIProxyEnabled: true,
				APIProxyPath:    "/api",
				APIProxyPass:    "http://127.0.0.1:8080",
				APIProxyRewrite: "/",
			},
			expected: []string{
				"location /api {",
				"rewrite ^/api/(.*)$ /$1 break;",
				"rewrite ^/api$ / break;",
				"proxy_pass http://127.0.0.1:8080;",
			},
		},
		{
			name: "enabled proxy with rewrite to subpath",
			deployment: &PagesDeployment{
				APIProxyEnabled: true,
				APIProxyPath:    "/api",
				APIProxyPass:    "http://127.0.0.1:8080",
				APIProxyRewrite: "/v2",
			},
			expected: []string{
				"location /api {",
				"rewrite ^/api/(.*)$ /v2/$1 break;",
				"rewrite ^/api$ /v2 break;",
				"proxy_pass http://127.0.0.1:8080;",
			},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got := renderPagesAPIProxyLocationBlock(tt.deployment)
			if len(tt.expected) == 1 && tt.expected[0] == "" {
				if got != "" {
					t.Fatalf("expected empty output, got: %q", got)
				}
				return
			}
			for _, exp := range tt.expected {
				if !strings.Contains(got, exp) {
					t.Errorf("expected output to contain %q, but got:\n%s", exp, got)
				}
			}
			for _, unexp := range tt.unexpected {
				if strings.Contains(got, unexp) {
					t.Errorf("expected output NOT to contain %q, but got:\n%s", unexp, got)
				}
			}
		})
	}
}