package functiontest

import (
	"encoding/json"
	"fmt"
	"os"

	function "example.com/database/function"
	"example.com/database/functiontag"
	testrequest "example.com/test/testrequest"
	testsetup "example.com/test/testsetup"
	functiontagtest "example.com/unit/functiontagtest"
	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/suite"
	"gorm.io/gorm"
)

type TestFunction struct {
	Result []function.Function `json:"result"`
}

type FunctionTestSuite struct {
	suite.Suite
	globalAuthHeader   string
	router             *gin.Engine
	function           function.Function
	functionJSON       []byte
	functionUpdate     function.Function
	functionUpdateJSON []byte
}

func (s *FunctionTestSuite) SetupTestSuite() {
	s.globalAuthHeader, s.router = testsetup.SetupTestSuite()
	// Create Test Data
	testFunctionTag := functiontag.FunctionTag{
		Model: gorm.Model{ID: 1},
		Name:  "test",
	}
	testFunction := function.Function{
		Model:        gorm.Model{ID: 2},
		Name:         "test",
		Tags:         []functiontag.FunctionTag{},
		Requirements: []function.Function{},
	}
	s.function = function.Function{
		Model:        gorm.Model{ID: 1},
		Name:         "another_test",
		Tags:         []functiontag.FunctionTag{},
		Requirements: []function.Function{},
	}
	s.functionJSON, _ = json.Marshal(s.function)
	s.functionUpdate = function.Function{
		Model: gorm.Model{ID: 1},
		Name:  "yet_another_test",
		Tags: []functiontag.FunctionTag{
			testFunctionTag,
		},
		Requirements: []function.Function{
			testFunction,
		},
	}
	s.functionUpdateJSON, _ = json.Marshal(function.FunctionParams{
		Name:         s.functionUpdate.Name,
		Tags:         []uint{1},
		Requirements: []uint{2},
	})
}

func (s *FunctionTestSuite) TearDownTestSuite() {
	os.Remove("db/main.db")
}

func (s *FunctionTestSuite) Test01CreateFunction() {
	// Setup variables
	var output TestFunction
	target := fmt.Sprintf("/function?id=%d", s.function.ID)

	// Attempt to create function
	status := testrequest.MakePostRequest(&s.functionJSON, "/function", s.globalAuthHeader, s.router)
	// Check that the request was successful
	s.Equal(status, "200 OK", "function created successfully")

	// Attempt to get function
	body := testrequest.MakeGetRequest(target, s.router)
	// Unmarshal the result
	json.Unmarshal(body, &output)
	// Check that the function listed matches the created function
	s.Equal(s.function.Name, output.Result[0].Name, "input name matches output name")
}

func (s *FunctionTestSuite) Test02GetFunction() {
	// Setup variables
	var output TestFunction

	// Attempt to get functions
	body := testrequest.MakeGetRequest("/function", s.router)
	// Unmarshal the result
	json.Unmarshal(body, &output)
	// Check that the functions listed match the created functions
	s.Equal(s.function.Name, output.Result[0].Name, "input name matches output name")
}

func (s *FunctionTestSuite) Test03UpdateFunction() {
	// Setup variables
	var output TestFunction
	target := fmt.Sprintf("/function?id=%d", s.function.ID)

	// Create needed field objects
	// Setup variables
	var functionTagOutput functiontagtest.TestFunctionTag
	functionTagBody, _ := json.Marshal(s.functionUpdate.Tags[0])
	// Attempt to create function tag
	functionTagStatus := testrequest.MakePostRequest(&functionTagBody, "/function-tag", s.globalAuthHeader, s.router)
	// Check that the request was successful
	s.Equal(functionTagStatus, "200 OK", "function tag created successfully")
	// Setup variables
	functionTagTarget := fmt.Sprintf("/function-tag?id=%d", s.functionUpdate.Tags[0].ID)
	// Attempt to get function tag
	functionTagBody = testrequest.MakeGetRequest(functionTagTarget, s.router)
	// Unamrshal the result
	json.Unmarshal(functionTagBody, &functionTagOutput)
	// Check that the function tag listed matches the created function tag
	s.Equal(s.functionUpdate.Tags[0].Name, functionTagOutput.Result[0].Name, "input function tag name matches created function tag name")
	// Setup variables
	var functionOutput TestFunction
	functionBody, _ := json.Marshal(s.functionUpdate.Requirements[0])
	// Attempt to create function
	functionStatus := testrequest.MakePostRequest(&functionBody, "/function", s.globalAuthHeader, s.router)
	// Check that the request was successful
	s.Equal(functionStatus, "200 OK", "function created successfully")
	// Setup variables
	functionTarget := fmt.Sprintf("/function?id=%d", s.functionUpdate.Requirements[0].ID)
	// Attempt to get function
	functionBody = testrequest.MakeGetRequest(functionTarget, s.router)
	// Unmarshal the result
	json.Unmarshal(functionBody, &functionOutput)
	// Check that the function listed matches the created function
	s.Equal(s.functionUpdate.Requirements[0].Name, functionOutput.Result[0].Name, "input function name matches created function name")

	// Attempt to update function
	status := testrequest.MakePutRequest(&s.functionUpdateJSON, target, s.globalAuthHeader, s.router)
	// Check that the request was successful
	s.Equal(status, "200 OK", "function created successfully")

	// Attempt to get function
	body := testrequest.MakeGetRequest(target, s.router)
	// Unmarshal the result
	json.Unmarshal(body, &output)
	// Check that the function listed matches the updated function
	s.Equal(s.functionUpdate.Name, output.Result[0].Name, "input name matches output name")
	s.Equal(s.functionUpdate.Tags[0].Name, output.Result[0].Tags[0].Name, "input tags match output tags")
	s.Equal(s.functionUpdate.Requirements[0].Name, output.Result[0].Requirements[0].Name, "input requirements match output requirements")
}

func (s *FunctionTestSuite) Test04DeleteFunction() {
	// Setup variables
	var output TestFunction
	target := fmt.Sprintf("/function?id=%d", s.function.ID)

	// Attempt to delete function
	status := testrequest.MakeDeleteRequest(target, s.globalAuthHeader, s.router)
	// Check that the request was successful
	s.Equal(status, "200 OK", "function deleted successfully")

	// Attempt to get function
	body := testrequest.MakeGetRequest(target, s.router)
	// Unmarshal the result
	json.Unmarshal(body, &output)
	// Check that the function list has one entry
	s.Equal(1, len(output.Result), "function list has one entry left")
}