package hermes

import (
	"github.com/stretchr/testify/assert"
	"testing"
)

var testedThemes = []Theme{
	// Insert your new theme here
	new(Default),
}

/////////////////////////////////////////////////////
// Every theme should display the same information //
// Find below the tests to check that              //
/////////////////////////////////////////////////////

// Implement this interface when creating a new example checking a common feature of all themes
type Example interface {
	// Create the hermes example with data
	// Represents the "Given" step in Given/When/Then Workflow
	getExample() (h Hermes, email Email)
	// Checks the content of the generated HTML email by asserting content presence or not
	assertHTMLContent(t *testing.T, s string)
	// Checks the content of the generated Plaintext email by asserting content presence or not
	assertPlainTextContent(t *testing.T, s string)
}

// Scenario
type SimpleExample struct {
	theme Theme
}

func (ed *SimpleExample) getExample() (Hermes, Email) {
	h := Hermes{
		Theme: ed.theme,
		Product: Product{
			Name:      "HermesName",
			Link:      "http://hermes-link.com",
			Copyright: "Copyright © Hermes-Test",
			Logo:      "http://www.duchess-france.org/wp-content/uploads/2016/01/gopher.png",
		},
		TextDirection: TDLeftToRight,
	}

	email := Email{
		Body{
			Name: "Jon Snow",
			Intros: []string{
				"Welcome to Hermes! We're very excited to have you on board.",
			},
			Dictionary: []Entry{
				{"Firstname", "Jon"},
				{"Lastname", "Snow"},
				{"Birthday", "01/01/283"},
			},
			Table: Table{
				Data: [][]Entry{
					{
						{Key: "Item", Value: "Golang"},
						{Key: "Description", Value: "Open source programming language that makes it easy to build simple, reliable, and efficient software"},
						{Key: "Price", Value: "$10.99"},
					},
					{
						{Key: "Item", Value: "Hermes"},
						{Key: "Description", Value: "Programmatically create beautiful e-mails using Golang."},
						{Key: "Price", Value: "$1.99"},
					},
				},
				Columns: Columns{
					CustomWidth: map[string]string{
						"Item":  "20%",
						"Price": "15%",
					},
					CustomAlignement: map[string]string{
						"Price": "right",
					},
				},
			},
			Actions: []Action{
				{
					Instructions: "To get started with Hermes, please click here:",
					Button: Button{
						Color: "#22BC66",
						Text:  "Confirm your account",
						Link:  "https://hermes-example.com/confirm?token=d9729feb74992cc3482b350163a1a010",
					},
				},
			},
			Outros: []string{
				"Need help, or have questions? Just reply to this email, we'd love to help.",
			},
		},
	}
	return h, email
}

func (ed *SimpleExample) assertHTMLContent(t *testing.T, r string) {

	// Assert on product
	assert.Contains(t, r, "HermesName", "Product: Should find the name of the product in email")
	assert.Contains(t, r, "http://hermes-link.com", "Product: Should find the link of the product in email")
	assert.Contains(t, r, "Copyright © Hermes-Test", "Product: Should find the Copyright of the product in email")
	assert.Contains(t, r, "http://www.duchess-france.org/wp-content/uploads/2016/01/gopher.png", "Product: Should find the logo of the product in email")
	assert.Contains(t, r, "If you’re having trouble with the button 'Confirm your account', copy and paste the URL below into your web browser.", "Product: Should find the trouble text in email")
	// Assert on email body
	assert.Contains(t, r, "Hi Jon Snow", "Name: Should find the name of the person")
	assert.Contains(t, r, "Welcome to Hermes", "Intro: Should have intro")
	assert.Contains(t, r, "Birthday", "Dictionary: Should have dictionary")
	assert.Contains(t, r, "Open source programming language", "Table: Should have table with first row and first column")
	assert.Contains(t, r, "Programmatically create beautiful e-mails using Golang", "Table: Should have table with second row and first column")
	assert.Contains(t, r, "$10.99", "Table: Should have table with first row and second column")
	assert.Contains(t, r, "$1.99", "Table: Should have table with second row and second column")
	assert.Contains(t, r, "started with Hermes", "Action: Should have instruction")
	assert.Contains(t, r, "Confirm your account", "Action: Should have button of action")
	assert.Contains(t, r, "#22BC66", "Action: Button should have given color")
	assert.Contains(t, r, "https://hermes-example.com/confirm?token=d9729feb74992cc3482b350163a1a010", "Action: Button should have link")
	assert.Contains(t, r, "Need help, or have questions", "Outro: Should have outro")
}

func (ed *SimpleExample) assertPlainTextContent(t *testing.T, r string) {

	// Assert on product
	assert.Contains(t, r, "HermesName", "Product: Should find the name of the product in email")
	assert.Contains(t, r, "http://hermes-link.com", "Product: Should find the link of the product in email")
	assert.Contains(t, r, "Copyright © Hermes-Test", "Product: Should find the Copyright of the product in email")
	assert.NotContains(t, r, "http://www.duchess-france.org/wp-content/uploads/2016/01/gopher.png", "Product: Should not find any logo in plain text")

	// Assert on email body
	assert.Contains(t, r, "Hi Jon Snow", "Name: Should find the name of the person")
	assert.Contains(t, r, "Welcome to Hermes", "Intro: Should have intro")
	assert.Contains(t, r, "Birthday", "Dictionary: Should have dictionary")
	assert.NotContains(t, r, "Open source programming language", "Table: Not possible to have table in plain text")
	assert.NotContains(t, r, "Programmatically create beautiful e-mails using Golang", "Table: Not possible to have table in plain text")
	assert.NotContains(t, r, "$10.99", "Table: Not possible to have table in plain text")
	assert.NotContains(t, r, "$1.99", "Table: Not possible to have table in plain text")
	assert.Contains(t, r, "started with Hermes", "Action: Should have instruction")
	assert.NotContains(t, r, "Confirm your account", "Action: Should not have button of action in plain text")
	assert.NotContains(t, r, "#22BC66", "Action: Button should not have color in plain text")
	assert.Contains(t, r, "https://hermes-example.com/confirm?token=d9729feb74992cc3482b350163a1a010", "Action: Even if button is not possible in plain text, it should have the link")
	assert.Contains(t, r, "Need help, or have questions", "Outro: Should have outro")
}

type WithTitleInsteadOfNameExample struct {
	theme Theme
}

func (ed *WithTitleInsteadOfNameExample) getExample() (Hermes, Email) {
	h := Hermes{
		Theme: ed.theme,
		Product: Product{
			Name: "Hermes",
			Link: "http://hermes.com",
		},
	}

	email := Email{
		Body{
			Name:  "Jon Snow",
			Title: "A new e-mail",
		},
	}
	return h, email
}

func (ed *WithTitleInsteadOfNameExample) assertHTMLContent(t *testing.T, r string) {
	assert.NotContains(t, r, "Hi Jon Snow", "Name: should not find greetings from Jon Snow because title should be used")
	assert.Contains(t, r, "A new e-mail", "Title should be used instead of name")
}

func (ed *WithTitleInsteadOfNameExample) assertPlainTextContent(t *testing.T, r string) {
	assert.NotContains(t, r, "Hi Jon Snow", "Name: should not find greetings from Jon Snow because title should be used")
	assert.Contains(t, r, "A new e-mail", "Title shoud be used instead of name")
}

type WithGreetingDifferentThanDefault struct {
	theme Theme
}

func (ed *WithGreetingDifferentThanDefault) getExample() (Hermes, Email) {
	h := Hermes{
		Theme: ed.theme,
		Product: Product{
			Name: "Hermes",
			Link: "http://hermes.com",
		},
	}

	email := Email{
		Body{
			Greeting: "Dear",
			Name:     "Jon Snow",
		},
	}
	return h, email
}

func (ed *WithGreetingDifferentThanDefault) assertHTMLContent(t *testing.T, r string) {
	assert.NotContains(t, r, "Hi Jon Snow", "Should not find greetings with 'Hi' which is default")
	assert.Contains(t, r, "Dear Jon Snow", "Should have greeting with Dear")
}

func (ed *WithGreetingDifferentThanDefault) assertPlainTextContent(t *testing.T, r string) {
	assert.NotContains(t, r, "Hi Jon Snow", "Should not find greetings with 'Hi' which is default")
	assert.Contains(t, r, "Dear Jon Snow", "Should have greeting with Dear")
}

type WithSignatureDifferentThanDefault struct {
	theme Theme
}

func (ed *WithSignatureDifferentThanDefault) getExample() (Hermes, Email) {
	h := Hermes{
		Theme: ed.theme,
		Product: Product{
			Name: "Hermes",
			Link: "http://hermes.com",
		},
	}

	email := Email{
		Body{
			Name:      "Jon Snow",
			Signature: "Best regards",
		},
	}
	return h, email
}

func (ed *WithSignatureDifferentThanDefault) assertHTMLContent(t *testing.T, r string) {
	assert.NotContains(t, r, "Yours truly", "Should not find signature with 'Yours truly' which is default")
	assert.Contains(t, r, "Best regards", "Should have greeting with Dear")
}

func (ed *WithSignatureDifferentThanDefault) assertPlainTextContent(t *testing.T, r string) {
	assert.NotContains(t, r, "Yours truly", "Should not find signature with 'Yours truly' which is default")
	assert.Contains(t, r, "Best regards", "Should have greeting with Dear")
}

// Test all the themes for the features

func TestThemeSimple(t *testing.T) {
	for _, theme := range testedThemes {
		checkExample(t, &SimpleExample{theme})
	}
}

func TestThemeWithTitleInsteadOfName(t *testing.T) {
	for _, theme := range testedThemes {
		checkExample(t, &WithTitleInsteadOfNameExample{theme})
	}
}

func TestThemeWithGreetingDifferentThanDefault(t *testing.T) {
	for _, theme := range testedThemes {
		checkExample(t, &WithGreetingDifferentThanDefault{theme})
	}
}

func TestThemeWithGreetingDiffrentThanDefault(t *testing.T) {
	for _, theme := range testedThemes {
		checkExample(t, &WithSignatureDifferentThanDefault{theme})
	}
}

func checkExample(t *testing.T, ex Example) {
	// Given an example
	h, email := ex.getExample()

	// When generating HTML template
	r, err := h.GenerateHTML(email)
	t.Log(r)
	assert.Nil(t, err)
	assert.NotEmpty(t, r)

	// Then asserting HTML is OK
	ex.assertHTMLContent(t, r)

	// When generating plain text template
	r, err = h.GeneratePlainText(email)
	t.Log(r)
	assert.Nil(t, err)
	assert.NotEmpty(t, r)

	// Then asserting plain text is OK
	ex.assertPlainTextContent(t, r)
}

////////////////////////////////////////////
// Tests on default values for all themes //
// It does not check email content        //
////////////////////////////////////////////

func TestHermes_TextDirectionAsDefault(t *testing.T) {
	h := Hermes{
		Product: Product{
			Name: "Hermes",
			Link: "http://hermes.com",
		},
		TextDirection: "not-existing", // Wrong text-direction
	}

	email := Email{
		Body{
			Name: "Jon Snow",
			Intros: []string{
				"Welcome to Hermes! We're very excited to have you on board.",
			},
			Actions: []Action{
				{
					Instructions: "To get started with Hermes, please click here:",
					Button: Button{
						Color: "#22BC66",
						Text:  "Confirm your account",
						Link:  "https://hermes-example.com/confirm?token=d9729feb74992cc3482b350163a1a010",
					},
				},
			},
			Outros: []string{
				"Need help, or have questions? Just reply to this email, we'd love to help.",
			},
		},
	}

	_, err := h.GenerateHTML(email)
	assert.Nil(t, err)
	assert.Equal(t, h.TextDirection, TDLeftToRight)
	assert.Equal(t, h.Theme.Name(), "default")
}

func TestHermes_Default(t *testing.T) {
	h := Hermes{}
	setDefaultHermesValues(&h)
	email := Email{}
	setDefaultEmailValues(&email)

	assert.Equal(t, h.TextDirection, TDLeftToRight)
	assert.Equal(t, h.Theme, new(Default))
	assert.Equal(t, h.Product.Name, "Hermes")
	assert.Equal(t, h.Product.Copyright, "Copyright © 2017 Hermes. All rights reserved.")

	assert.Empty(t, email.Body.Actions)
	assert.Empty(t, email.Body.Dictionary)
	assert.Empty(t, email.Body.Intros)
	assert.Empty(t, email.Body.Outros)
	assert.Empty(t, email.Body.Table.Data)
	assert.Empty(t, email.Body.Table.Columns.CustomWidth)
	assert.Empty(t, email.Body.Table.Columns.CustomAlignement)

	assert.Equal(t, email.Body.Greeting, "Hi")
	assert.Equal(t, email.Body.Signature, "Yours truly")
	assert.Empty(t, email.Body.Title)
}