package main

import (
	"github.com/valyala/fasthttp"
)

func (suite *Tests) Test_parseGraphQLQuery() {

	type results struct {
		op_name      string
		op_type      string
		cached_ttl   int
		returnCode   int
		is_cached    bool
		shouldBlock  bool
		shouldIgnore bool
	}

	type queries struct {
		headers map[string]string
		body    string
	}

	tests := []struct {
		name             string
		suppliedSettings *config
		suppliedQuery    queries
		wantResults      results
	}{
		{
			name: "test empty body",
			suppliedQuery: queries{
				body:    "",
				headers: map[string]string{},
			},
			wantResults: results{
				is_cached:    false,
				shouldBlock:  false,
				shouldIgnore: true,
				op_name:      "",
				op_type:      "",
			},
		},

		{
			name: "test empty json",
			suppliedQuery: queries{
				body:    "{}",
				headers: map[string]string{},
			},
			wantResults: results{
				is_cached:    false,
				shouldBlock:  false,
				shouldIgnore: true,
				op_name:      "",
				op_type:      "",
			},
		},

		{
			name: "test empty with some random garbage",
			suppliedQuery: queries{
				body:    "{\"variables\": {\"id\": \"1\"}}",
				headers: map[string]string{},
			},
			wantResults: results{
				is_cached:    false,
				shouldBlock:  false,
				shouldIgnore: true,
				op_name:      "",
				op_type:      "",
			},
		},

		{
			name: "test valid query with op name",
			suppliedQuery: queries{
				body: "{\"query\":\"query MyQuery { tg_users(where: {handle: {_eq: \\\"tozuo\\\"}}) { id __typename } }\"}",
			},
			wantResults: results{
				is_cached:    false,
				shouldBlock:  false,
				shouldIgnore: false,
				op_name:      "MyQuery",
				op_type:      "query",
			},
		},

		{
			name: "test valid query with op name, variables and cache",
			suppliedQuery: queries{
				body: "{\"query\":\"query MyQuery @cached { tg_users(where: {handle: {_eq: \\\"tozuo\\\"}}) { id __typename } }\", \"variables\": {\"id\": \"1\"}}",
			},
			wantResults: results{
				is_cached:    true,
				shouldBlock:  false,
				shouldIgnore: false,
				op_name:      "MyQuery",
				op_type:      "query",
			},
		},

		{
			name: "test valid query with op name, cache and ttl",
			suppliedQuery: queries{
				body: "{\"query\":\"query MyQuery @cached(ttl: 60) { tg_users(where: {handle: {_eq: \\\"tozuo\\\"}}) { id __typename } }\", \"variables\": {\"id\": \"1\"}}",
			},
			wantResults: results{
				is_cached:    true,
				cached_ttl:   60,
				shouldBlock:  false,
				shouldIgnore: false,
				op_name:      "MyQuery",
				op_type:      "query",
			},
		},

		{
			name: "test valid query with op name, force refreshed cache",
			suppliedQuery: queries{
				body: "{\"query\":\"query MyQuery @cached(refresh: true) { tg_users(where: {handle: {_eq: \\\"tozuo\\\"}}) { id __typename } }\", \"variables\": {\"id\": \"1\"}}",
			},
			wantResults: results{
				is_cached:    true,
				cached_ttl:   0,
				shouldBlock:  false,
				shouldIgnore: false,
				op_name:      "MyQuery",
				op_type:      "query",
			},
		},

		{
			name: "test valid query with op name, cache and INVALID ttl",
			suppliedQuery: queries{
				body: "{\"query\":\"query MyQuery @cached(ttl: nope) { tg_users(where: {handle: {_eq: \\\"tozuo\\\"}}) { id __typename } }\", \"variables\": {\"id\": \"1\"}}",
			},
			wantResults: results{
				is_cached:    true,
				cached_ttl:   0,
				shouldBlock:  false,
				shouldIgnore: false,
				op_name:      "MyQuery",
				op_type:      "query",
			},
		},

		{
			name: "test mutation query with op name",
			suppliedQuery: queries{
				body: "{\"query\":\"mutation MyMutation { tg_users(where: {handle: {_eq: \\\"tozuo\\\"}}) { id __typename } }\"}",
			},
			wantResults: results{
				is_cached:    false,
				shouldBlock:  false,
				shouldIgnore: false,
				op_name:      "MyMutation",
				op_type:      "mutation",
			},
		},

		{
			name: "test mutation query with config: read only",
			suppliedSettings: func() *config {
				parseConfig()
				cfg.Server.ReadOnlyMode = true
				return cfg
			}(),
			suppliedQuery: queries{
				body: "{\"query\":\"mutation MyMutation { tg_users(where: {handle: {_eq: \\\"tozuo\\\"}}) { id __typename } }\"}",
			},
			wantResults: results{
				is_cached:    false,
				shouldBlock:  true,
				shouldIgnore: false,
				op_name:      "MyMutation",
				op_type:      "mutation",
				returnCode:   403,
			},
		},

		{
			name: "test simple query with introspection __schema",
			suppliedQuery: queries{
				body: "{\"query\":\"mutation MyMutation { tg_users(where: {handle: {_eq: \\\"tozuo\\\"}}) { id __schema } }\"}",
			},
			wantResults: results{
				is_cached:    false,
				shouldBlock:  false,
				shouldIgnore: false,
				op_name:      "MyMutation",
				op_type:      "mutation",
			},
		},

		{
			name: "test simple query with introspection __schema config: block introspection",
			suppliedSettings: func() *config {
				parseConfig()
				cfg.Security.BlockIntrospection = true
				return cfg
			}(),
			suppliedQuery: queries{
				body: "{\"query\":\"query MyIntroQuery { tg_users(where: {handle: {_eq: \\\"tozuo\\\"}}) { id __schema } }\"}",
			},
			wantResults: results{
				is_cached:    false,
				shouldBlock:  true,
				shouldIgnore: false,
				op_name:      "MyIntroQuery",
				op_type:      "query",
				returnCode:   403,
			},
		},

		{
			name: "test user supplied query with introspection #1 - config: block",
			suppliedSettings: func() *config {
				parseConfig()
				cfg.Security.BlockIntrospection = true
				cfg.Security.IntrospectionAllowed = []string{}
				return cfg
			}(),
			suppliedQuery: queries{
				body: "{\"query\":\"{__schema {queryType {fields {name description}}}}\"}",
			},
			wantResults: results{
				is_cached:    false,
				shouldBlock:  true,
				shouldIgnore: false,
				op_name:      "undefined",
				op_type:      "query",
				returnCode:   403,
			},
		},

		{
			name: "test user supplied query with introspection #1 - config: block & allow __schema",
			suppliedSettings: func() *config {
				parseConfig()
				cfg.Security.BlockIntrospection = true
				cfg.Security.IntrospectionAllowed = []string{"__schema"}
				return cfg
			}(),
			suppliedQuery: queries{
				body: "{\"query\":\"{__schema {queryType {fields {name description}}}}\"}",
			},
			wantResults: results{
				is_cached:    false,
				shouldBlock:  false,
				shouldIgnore: false,
				op_name:      "undefined",
				op_type:      "query",
				returnCode:   200,
			},
		},

		{
			name: "test invalid query",
			suppliedQuery: queries{
				body: "{\"query\":\"query MyQuery tg_users(where: {handle: {_eq: \\\"tozuo\\\"}}) { id __typename } \"}",
			},
			wantResults: results{
				is_cached:    false,
				shouldBlock:  false,
				shouldIgnore: true,
				op_name:      "",
				op_type:      "",
			},
		},
	}

	for _, tt := range tests {
		suite.Run(tt.name, func() {
			cfg = &config{}
			parseConfig()
			ctx_headers := func() *fasthttp.RequestHeader {
				h := fasthttp.RequestHeader{}
				for k, v := range tt.suppliedQuery.headers {
					h.Add(k, v)
				}
				return &h
			}()

			ctx_request := fasthttp.Request{
				Header: *ctx_headers,
			}

			ctx_request.AppendBody([]byte(tt.suppliedQuery.body))

			ctx := suite.app.AcquireCtx(&fasthttp.RequestCtx{
				Request: ctx_request,
			})

			// defer func() {
			// 	cfg = &config{}
			// 	parseConfig()
			// 	suite.app.ReleaseCtx(ctx)
			// }()

			assert.NotNil(ctx, "Fiber context is nil")

			if tt.suppliedSettings != nil {
				cfg = tt.suppliedSettings
			}
			prepareQueriesAndExemptions()
			parseResult := parseGraphQLQuery(ctx)
			assert.Equal(tt.wantResults.op_type, parseResult.operationType, "Unexpected operation type "+tt.name)
			assert.Equal(tt.wantResults.op_name, parseResult.operationName, "Unexpected operation name "+tt.name)
			assert.Equal(tt.wantResults.is_cached, parseResult.cacheRequest, "Unexpected cache value "+tt.name)
			assert.Equal(tt.wantResults.cached_ttl, parseResult.cacheTime, "Unexpected cache TTL value "+tt.name)
			assert.Equal(tt.wantResults.shouldBlock, parseResult.shouldBlock, "Unexpected block value "+tt.name)
			assert.Equal(tt.wantResults.shouldIgnore, parseResult.shouldIgnore, "Unexpected ignore value "+tt.name)

			if tt.wantResults.returnCode > 0 {
				assert.Equal(tt.wantResults.returnCode, ctx.Response().StatusCode(), "Unexpected return code", tt.name)
			}
		})
	}
}