package book

import (
	"encoding/json"
	"testing"
	"time"

	"github.com/flipped-aurora/gin-vue-admin/server/global"
	"github.com/flipped-aurora/gin-vue-admin/server/model/book"
	bookReq "github.com/flipped-aurora/gin-vue-admin/server/model/book/request"
	commonReq "github.com/flipped-aurora/gin-vue-admin/server/model/common/request"
	"github.com/glebarez/sqlite"
	"github.com/stretchr/testify/require"
	"gorm.io/gorm"
)

func setupBookDisplayTestDB(t *testing.T) {
	t.Helper()

	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
	require.NoError(t, err)
	require.NoError(t, db.AutoMigrate(
		&book.Book{},
		&book.BookChapter{},
		&book.BookComment{},
		&book.BookCommentLikeRecord{},
		&book.BookFavoriteRecord{},
		&book.BookReadRecord{},
	))

	global.GVA_DB = db
	t.Cleanup(func() {
		global.GVA_DB = nil
	})
}

func createBookDisplayFixture(t *testing.T) (book.Book, book.BookChapter, book.BookComment) {
	t.Helper()

	bookItem := book.Book{
		Title:            "边城",
		BookType:         "novel",
		EraTag:           book.BookEraTagModern,
		CompletionStatus: book.BookCompletionStatusCompleted,
		PublishStatus:    book.BookPublishStatusOnShelf,
	}
	require.NoError(t, global.GVA_DB.Create(&bookItem).Error)

	chapter := book.BookChapter{
		BookID:         bookItem.ID,
		Title:          "第一章 茶峒",
		ChapterNo:      1,
		ContentFileUrl: "chapters/biancheng-1.txt",
		IsEnabled:      true,
	}
	require.NoError(t, global.GVA_DB.Create(&chapter).Error)

	comment := book.BookComment{
		MemberUserID:  7,
		BookID:        bookItem.ID,
		ChapterID:     chapter.ID,
		Content:       "这段很有画面感",
		CommentStatus: book.BookCommentStatusNormal,
	}
	require.NoError(t, global.GVA_DB.Create(&comment).Error)

	return bookItem, chapter, comment
}

func requireJSONField(t *testing.T, value any, key string, expected any) {
	t.Helper()

	payload, err := json.Marshal(value)
	require.NoError(t, err)
	var got map[string]any
	require.NoError(t, json.Unmarshal(payload, &got))
	require.Equal(t, expected, got[key])
}

func TestBookChapterServiceReturnsBookTitle(t *testing.T) {
	setupBookDisplayTestDB(t)
	bookItem, chapter, _ := createBookDisplayFixture(t)

	list, total, err := (&BookChapterService{}).GetBookChapterInfoList(bookReq.BookChapterSearch{
		PageInfo: commonReq.PageInfo{Page: 1, PageSize: 10},
		BookID:   uintPtr(bookItem.ID),
	})
	require.NoError(t, err)
	require.EqualValues(t, 1, total)
	require.Len(t, list, 1)
	require.Equal(t, chapter.ID, list[0].ID)
	requireJSONField(t, list[0], "bookTitle", "边城")

	detail, err := (&BookChapterService{}).GetBookChapter(chapter.ID)
	require.NoError(t, err)
	requireJSONField(t, detail, "bookTitle", "边城")
}

func TestBookCommentServiceReturnsBookAndChapterTitles(t *testing.T) {
	setupBookDisplayTestDB(t)
	bookItem, _, comment := createBookDisplayFixture(t)

	list, total, err := (&BookCommentService{}).GetBookCommentInfoList(bookReq.BookCommentSearch{
		PageInfo: commonReq.PageInfo{Page: 1, PageSize: 10},
		BookID:   uintPtr(bookItem.ID),
	})
	require.NoError(t, err)
	require.EqualValues(t, 1, total)
	require.Len(t, list, 1)
	require.Equal(t, comment.ID, list[0].ID)
	requireJSONField(t, list[0], "bookTitle", "边城")
	requireJSONField(t, list[0], "chapterTitle", "第一章 茶峒")

	detail, err := (&BookCommentService{}).GetBookComment(comment.ID)
	require.NoError(t, err)
	requireJSONField(t, detail, "bookTitle", "边城")
	requireJSONField(t, detail, "chapterTitle", "第一章 茶峒")
}

func TestBookCommentLikeRecordServiceReturnsCommentDisplayFields(t *testing.T) {
	setupBookDisplayTestDB(t)
	_, _, comment := createBookDisplayFixture(t)
	record := book.BookCommentLikeRecord{
		CommentID:    comment.ID,
		MemberUserID: 8,
		LikedAt:      time.Now(),
	}
	require.NoError(t, global.GVA_DB.Create(&record).Error)

	list, total, err := (&BookCommentLikeRecordService{}).GetBookCommentLikeRecordInfoList(bookReq.BookCommentLikeRecordSearch{
		PageInfo:  commonReq.PageInfo{Page: 1, PageSize: 10},
		CommentID: uintPtr(comment.ID),
	})
	require.NoError(t, err)
	require.EqualValues(t, 1, total)
	require.Len(t, list, 1)
	require.Equal(t, record.ID, list[0].ID)
	requireJSONField(t, list[0], "bookTitle", "边城")
	requireJSONField(t, list[0], "commentContent", "这段很有画面感")

	detail, err := (&BookCommentLikeRecordService{}).GetBookCommentLikeRecord(record.ID)
	require.NoError(t, err)
	requireJSONField(t, detail, "bookTitle", "边城")
	requireJSONField(t, detail, "commentContent", "这段很有画面感")
}

func TestBookFavoriteRecordServiceReturnsBookTitle(t *testing.T) {
	setupBookDisplayTestDB(t)
	bookItem, _, _ := createBookDisplayFixture(t)
	record := book.BookFavoriteRecord{
		MemberUserID: 9,
		BookID:       bookItem.ID,
		FavoritedAt:  time.Now(),
	}
	require.NoError(t, global.GVA_DB.Create(&record).Error)

	list, total, err := (&BookFavoriteRecordService{}).GetBookFavoriteRecordInfoList(bookReq.BookFavoriteRecordSearch{
		PageInfo: commonReq.PageInfo{Page: 1, PageSize: 10},
		BookID:   uintPtr(bookItem.ID),
	})
	require.NoError(t, err)
	require.EqualValues(t, 1, total)
	require.Len(t, list, 1)
	require.Equal(t, record.ID, list[0].ID)
	requireJSONField(t, list[0], "bookTitle", "边城")

	detail, err := (&BookFavoriteRecordService{}).GetBookFavoriteRecord(record.ID)
	require.NoError(t, err)
	requireJSONField(t, detail, "bookTitle", "边城")
}

func TestBookReadRecordServiceReturnsChapterTitle(t *testing.T) {
	setupBookDisplayTestDB(t)
	bookItem, chapter, _ := createBookDisplayFixture(t)
	record := book.BookReadRecord{
		MemberUserID:      10,
		BookID:            bookItem.ID,
		BookTitleSnapshot: bookItem.Title,
		ReadProgress:      12.5,
		ChapterID:         chapter.ID,
		LineIndex:         3,
		LastReadAt:        time.Now(),
	}
	require.NoError(t, global.GVA_DB.Create(&record).Error)

	list, total, err := (&BookReadRecordService{}).GetBookReadRecordInfoList(bookReq.BookReadRecordSearch{
		PageInfo: commonReq.PageInfo{Page: 1, PageSize: 10},
		BookID:   uintPtr(bookItem.ID),
	})
	require.NoError(t, err)
	require.EqualValues(t, 1, total)
	require.Len(t, list, 1)
	require.Equal(t, record.ID, list[0].ID)
	requireJSONField(t, list[0], "chapterTitle", "第一章 茶峒")

	detail, err := (&BookReadRecordService{}).GetBookReadRecord(record.ID)
	require.NoError(t, err)
	requireJSONField(t, detail, "chapterTitle", "第一章 茶峒")
}