//===----------------------------------------------------------------------===//
//
// This source file is part of the Hummingbird server framework project
//
// Copyright (c) 2021-2021 the Hummingbird authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See hummingbird/CONTRIBUTORS.txt for the list of Hummingbird authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//

import XCTest

@testable import Mustache

final class PartialTests: XCTestCase {
    /// Testing partials
    func testMustacheManualExample9() throws {
        let template = try MustacheTemplate(
            string: """
                <h2>Names</h2>
                {{#names}}
                    {{> us/er}}
                {{/names}}
                """
        )
        let template2 = try MustacheTemplate(
            string: """
                <strong>{{.}}</strong>

                """
        )
        let library = MustacheLibrary(templates: ["base": template, "us/er": template2])

        let object: [String: Any] = ["names": ["john", "adam", "claire"]]
        XCTAssertEqual(
            library.render(object, withTemplate: "base"),
            """
            <h2>Names</h2>
                <strong>john</strong>
                <strong>adam</strong>
                <strong>claire</strong>

            """
        )
    }

    /// Test where last line of partial generates no content. It should not add a
    /// tab either
    func testPartialEmptyLineTabbing() throws {
        let template = try MustacheTemplate(
            string: """
                <h2>Names</h2>
                {{#names}}
                  {{> user}}
                {{/names}}
                Text after

                """
        )
        let template2 = try MustacheTemplate(
            string: """
                {{^empty(.)}}
                <strong>{{.}}</strong>
                {{/empty(.)}}
                {{#empty(.)}}
                <strong>empty</strong>
                {{/empty(.)}}

                """
        )
        var library = MustacheLibrary()
        library.register(template, named: "base")
        library.register(template2, named: "user")
        let object: [String: Any] = ["names": ["john", "adam", "claire"]]
        XCTAssertEqual(
            library.render(object, withTemplate: "base"),
            """
            <h2>Names</h2>
              <strong>john</strong>
              <strong>adam</strong>
              <strong>claire</strong>
            Text after

            """
        )
    }

    func testTrailingNewLines() throws {
        let template1 = try MustacheTemplate(
            string: """
                {{> withNewLine }}
                >> {{> withNewLine }}
                [ {{> withNewLine }} ]
                """
        )
        let template2 = try MustacheTemplate(
            string: """
                {{> withoutNewLine }}
                >> {{> withoutNewLine }}
                [ {{> withoutNewLine }} ]
                """
        )
        let withNewLine = try MustacheTemplate(
            string: """
                {{#things}}{{.}}, {{/things}}

                """
        )
        let withoutNewLine = try MustacheTemplate(string: "{{#things}}{{.}}, {{/things}}")
        let library = MustacheLibrary(templates: [
            "base1": template1, "base2": template2, "withNewLine": withNewLine, "withoutNewLine": withoutNewLine,
        ])
        let object = ["things": [1, 2, 3, 4, 5]]
        XCTAssertEqual(
            library.render(object, withTemplate: "base1"),
            """
            1, 2, 3, 4, 5, 
            >> 1, 2, 3, 4, 5, 

            [ 1, 2, 3, 4, 5, 
             ]
            """
        )
        XCTAssertEqual(
            library.render(object, withTemplate: "base2"),
            """
            1, 2, 3, 4, 5, >> 1, 2, 3, 4, 5, 
            [ 1, 2, 3, 4, 5,  ]
            """
        )
    }

    /// Testing dynamic partials
    func testDynamicPartials() throws {
        let template = try MustacheTemplate(
            string: """
                <h2>Names</h2>
                {{partial}}
                """
        )
        let template2 = try MustacheTemplate(
            string: """
                {{#names}}
                  <strong>{{.}}</strong>
                {{/names}}
                """
        )
        let library = MustacheLibrary(templates: ["base": template])

        let object: [String: Any] = ["names": ["john", "adam", "claire"], "partial": template2]
        XCTAssertEqual(
            library.render(object, withTemplate: "base"),
            """
            <h2>Names</h2>
              <strong>john</strong>
              <strong>adam</strong>
              <strong>claire</strong>

            """
        )
    }

    /// test inheritance
    func testInheritance() throws {
        var library = MustacheLibrary()
        try library.register(
            """
            <head>
            <title>{{$title}}Default title{{/title}}</title>
            </head>
            """,
            named: "header"
        )
        try library.register(
            """
            <html>
            {{$header}}{{/header}}
            {{$content}}{{/content}}
            </html>

            """,
            named: "base"
        )
        try library.register(
            """
            {{<base}}
            {{$header}}
            {{<header}}
            {{$title}}My page title{{/title}}
            {{/header}}
            {{/header}}
            {{$content}}<h1>Hello world</h1>{{/content}}
            {{/base}}

            """,
            named: "mypage"
        )
        XCTAssertEqual(
            library.render({}, withTemplate: "mypage")!,
            """
            <html>
            <head>
            <title>My page title</title>
            </head>
            <h1>Hello world</h1>
            </html>

            """
        )
    }

    func testInheritanceIndentation() throws {
        var library = MustacheLibrary()
        try library.register(
            """
            Hi,
               {{$block}}{{/block}}
            """,
            named: "parent"
        )
        try library.register(
            """
            {{<parent}}
            {{$block}}
              one
               two
            {{/block}}
            {{/parent}}
            """,
            named: "template"
        )
        XCTAssertEqual(
            library.render({}, withTemplate: "template"),
            """
            Hi,
               one
                two

            """
        )
    }
}