package com.aiosman.riderpro.data

import androidx.paging.PagingSource
import androidx.paging.PagingState
import com.aiosman.riderpro.AppStore
import com.aiosman.riderpro.data.api.ApiClient
import com.aiosman.riderpro.data.api.ChangePasswordRequestBody
import com.aiosman.riderpro.data.api.LoginUserRequestBody
import com.aiosman.riderpro.data.api.RegisterRequestBody
import com.aiosman.riderpro.data.api.UpdateNoticeRequestBody
import com.aiosman.riderpro.test.TestDatabase
import com.google.gson.annotations.SerializedName
import okhttp3.MediaType.Companion.toMediaTypeOrNull
import okhttp3.MultipartBody
import okhttp3.RequestBody
import okhttp3.RequestBody.Companion.asRequestBody
import okhttp3.RequestBody.Companion.toRequestBody
import java.io.File
import java.io.IOException
import java.util.Date

data class AccountLikeEntity(
    val post: NoticePostEntity,
    val user: NoticeUserEntity,
    val likeTime: Date,
)
data class AccountFavouriteEntity(
    val post: NoticePostEntity,
    val user: NoticeUserEntity,
    val favoriteTime: Date,
)
data class AccountProfileEntity(
    val id: Int,
    val followerCount: Int,
    val followingCount: Int,
    val nickName: String,
    val avatar: String,
    val bio: String,
    val country: String,
    val isFollowing: Boolean
)

data class AccountProfile(
    val id: Int,
    val username: String,
    val nickname: String,
    val avatar: String,
    val followingCount: Int,
    val followerCount: Int,
    val isFollowing: Boolean
) {
    fun toAccountProfileEntity(): AccountProfileEntity {
        return AccountProfileEntity(
            id = id,
            followerCount = followerCount,
            followingCount = followingCount,
            nickName = nickname,
            avatar = "${ApiClient.BASE_SERVER}$avatar",
            bio = "",
            country = "Worldwide",
            isFollowing = isFollowing
        )
    }
}

data class NoticePostEntity(
    val id: Int,
    val textContent: String,
    val images: List<Image>,
    val time: Date,
)

data class NoticePost(
    @SerializedName("id")
    val id: Int,
    @SerializedName("textContent")
    val textContent: String,
    @SerializedName("images")
    val images: List<Image>,
    @SerializedName("time")
    val time: String,
) {
    fun toNoticePostEntity(): NoticePostEntity {
        return NoticePostEntity(
            id = id,
            textContent = textContent,
            images = images.map {
                it.copy(
                    url = "${ApiClient.BASE_SERVER}${it.url}",
                    thumbnail = "${ApiClient.BASE_SERVER}${it.thumbnail}",
                )
            },
            time = ApiClient.dateFromApiString(time)
        )
    }
}

data class NoticeUserEntity(
    val id: Int,
    val nickName: String,
    val avatar: String,
)

data class NoticeUser(
    @SerializedName("id")
    val id: Int,
    @SerializedName("nickName")
    val nickName: String,
    @SerializedName("avatar")
    val avatar: String,
) {
    fun toNoticeUserEntity(): NoticeUserEntity {
        return NoticeUserEntity(
            id = id,
            nickName = nickName,
            avatar = "${ApiClient.BASE_SERVER}$avatar",
        )
    }
}

data class AccountLike(
    @SerializedName("isUnread")
    val isUnread: Boolean,
    @SerializedName("post")
    val post: NoticePost,
    @SerializedName("user")
    val user: NoticeUser,
    @SerializedName("likeTime")
    val likeTime: String,
) {
    fun toAccountLikeEntity(): AccountLikeEntity {
        return AccountLikeEntity(
            post = post.toNoticePostEntity(),
            user = user.toNoticeUserEntity(),
            likeTime = ApiClient.dateFromApiString(likeTime)
        )
    }
}

data class AccountFavourite(
    @SerializedName("isUnread")
    val isUnread: Boolean,
    @SerializedName("post")
    val post: NoticePost,
    @SerializedName("user")
    val user: NoticeUser,
    @SerializedName("favoriteTime")
    val favouriteTime: String,
) {
    fun toAccountFavouriteEntity(): AccountFavouriteEntity {
        return AccountFavouriteEntity(
            post = post.toNoticePostEntity(),
            user = user.toNoticeUserEntity(),
            favoriteTime = ApiClient.dateFromApiString(favouriteTime)
        )
    }
}

data class AccountFollow(
    @SerializedName("id")
    val id: Int,
    @SerializedName("username")
    val username: String,
    @SerializedName("nickname")
    val nickname: String,
    @SerializedName("avatar")
    val avatar: String,
    @SerializedName("isUnread")
    val isUnread: Boolean,
    @SerializedName("userId")
    val userId: Int,
    @SerializedName("isFollowing")
    val isFollowing: Boolean,
)

//{
//    "likeCount": 0,
//    "followCount": 0,
//    "favoriteCount": 0
//}
data class AccountNotice(
    @SerializedName("likeCount")
    val likeCount: Int,
    @SerializedName("followCount")
    val followCount: Int,
    @SerializedName("favoriteCount")
    val favoriteCount: Int,
    @SerializedName("commentCount")
    val commentCount: Int,
)


class LikeItemPagingSource(
    private val accountService: AccountService,
) : PagingSource<Int, AccountLikeEntity>() {
    override suspend fun load(params: LoadParams<Int>): LoadResult<Int, AccountLikeEntity> {
        return try {
            val currentPage = params.key ?: 1
            val likes = accountService.getMyLikeNotice(
                page = currentPage,
                pageSize = 20,
            )

            LoadResult.Page(
                data = likes.list.map {
                    it.toAccountLikeEntity()
                },
                prevKey = if (currentPage == 1) null else currentPage - 1,
                nextKey = if (likes.list.isEmpty()) null else likes.page + 1
            )
        } catch (exception: IOException) {
            return LoadResult.Error(exception)
        }
    }

    override fun getRefreshKey(state: PagingState<Int, AccountLikeEntity>): Int? {
        return state.anchorPosition
    }
}

class FavoriteItemPagingSource(
    private val accountService: AccountService,
) : PagingSource<Int, AccountFavouriteEntity>() {
    override suspend fun load(params: LoadParams<Int>): LoadResult<Int, AccountFavouriteEntity> {
        return try {
            val currentPage = params.key ?: 1
            val favouriteListContainer = accountService.getMyFavouriteNotice(
                page = currentPage,
                pageSize = 20,
            )
            LoadResult.Page(
                data = favouriteListContainer.list.map {
                    it.toAccountFavouriteEntity()
                },
                prevKey = if (currentPage == 1) null else currentPage - 1,
                nextKey = if (favouriteListContainer.list.isEmpty()) null else favouriteListContainer.page + 1
            )
        } catch (exception: IOException) {
            return LoadResult.Error(exception)
        }
    }

    override fun getRefreshKey(state: PagingState<Int, AccountFavouriteEntity>): Int? {
        return state.anchorPosition
    }
}

class FollowItemPagingSource(
    private val accountService: AccountService,
) : PagingSource<Int, AccountFollow>() {
    override suspend fun load(params: LoadParams<Int>): LoadResult<Int, AccountFollow> {
        return try {
            val currentPage = params.key ?: 1
            val followListContainer = accountService.getMyFollowNotice(
                page = currentPage,
                pageSize = 20,
            )

            LoadResult.Page(
                data = followListContainer.list.map {
                    it.copy(
                        avatar = "${ApiClient.BASE_SERVER}${it.avatar}",
                    )
                },
                prevKey = if (currentPage == 1) null else currentPage - 1,
                nextKey = if (followListContainer.list.isEmpty()) null else followListContainer.page + 1
            )
        } catch (exception: IOException) {
            return LoadResult.Error(exception)
        }
    }

    override fun getRefreshKey(state: PagingState<Int, AccountFollow>): Int? {
        return state.anchorPosition
    }
}


interface AccountService {
    suspend fun getMyAccountProfile(): AccountProfileEntity
    suspend fun getAccountProfileById(id: Int): AccountProfileEntity
    suspend fun getMyAccount(): UserAuth
    suspend fun loginUserWithPassword(loginName: String, password: String): UserAuth
    suspend fun logout()
    suspend fun updateAvatar(uri: String)
    suspend fun updateProfile(avatar: UploadImage?, nickName: String?, bio: String?)
    suspend fun registerUserWithPassword(loginName: String, password: String)
    suspend fun changeAccountPassword(oldPassword: String, newPassword: String)
    suspend fun getMyLikeNotice(page: Int, pageSize: Int): ListContainer<AccountLike>
    suspend fun getMyFollowNotice(page: Int, pageSize: Int): ListContainer<AccountFollow>
    suspend fun getMyFavouriteNotice(page: Int, pageSize: Int): ListContainer<AccountFavourite>
    suspend fun getMyNoticeInfo(): AccountNotice
    suspend fun updateNotice(payload: UpdateNoticeRequestBody)
}

class TestAccountServiceImpl : AccountService {
    override suspend fun getMyAccountProfile(): AccountProfileEntity {
        val resp = ApiClient.api.getMyAccount()
        val body = resp.body() ?: throw ServiceException("Failed to get account")
        return body.data.toAccountProfileEntity()
    }

    override suspend fun getAccountProfileById(id: Int): AccountProfileEntity {
        val resp = ApiClient.api.getAccountProfileById(id)
        val body = resp.body() ?: throw ServiceException("Failed to get account")
        return body.data.toAccountProfileEntity()
    }

    override suspend fun getMyAccount(): UserAuth {
        val resp = ApiClient.api.checkToken()
        val body = resp.body() ?: throw ServiceException("Failed to get account")
        return UserAuth(body.id)
    }

    override suspend fun loginUserWithPassword(loginName: String, password: String): UserAuth {
        val resp = ApiClient.api.login(LoginUserRequestBody(loginName, password))
        val body = resp.body() ?: throw ServiceException("Failed to login")
        return UserAuth(0, body.token)
    }

    override suspend fun logout() {
        // do nothing
    }

    override suspend fun updateAvatar(uri: String) {
        TestDatabase.accountData = TestDatabase.accountData.map {
            if (it.id == 1) {
                it.copy(avatar = uri)
            } else {
                it
            }
        }
    }

    fun createMultipartBody(file: File, filename: String, name: String): MultipartBody.Part {
        val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
        return MultipartBody.Part.createFormData(name, filename, requestFile)
    }

    override suspend fun updateProfile(avatar: UploadImage?, nickName: String?, bio: String?) {
        val nicknameField: RequestBody? = nickName?.toRequestBody("text/plain".toMediaTypeOrNull())
        val avatarField: MultipartBody.Part? = avatar?.let {
            createMultipartBody(it.file, it.filename, "avatar")
        }
        ApiClient.api.updateProfile(avatarField, nicknameField)
    }

    override suspend fun registerUserWithPassword(loginName: String, password: String) {
        ApiClient.api.register(RegisterRequestBody(loginName, password))
    }

    override suspend fun changeAccountPassword(oldPassword: String, newPassword: String) {
        ApiClient.api.changePassword(ChangePasswordRequestBody(oldPassword, newPassword))
    }

    override suspend fun getMyLikeNotice(page: Int, pageSize: Int): ListContainer<AccountLike> {
        val resp = ApiClient.api.getMyLikeNotices(page, pageSize)
        val body = resp.body() ?: throw ServiceException("Failed to get account")
        return body
    }

    override suspend fun getMyFollowNotice(page: Int, pageSize: Int): ListContainer<AccountFollow> {
        val resp = ApiClient.api.getMyFollowNotices(page, pageSize)
        val body = resp.body() ?: throw ServiceException("Failed to get account")
        return body
    }

    override suspend fun getMyFavouriteNotice(
        page: Int,
        pageSize: Int
    ): ListContainer<AccountFavourite> {
        val resp = ApiClient.api.getMyFavouriteNotices(page, pageSize)
        val body = resp.body() ?: throw ServiceException("Failed to get account")
        return body
    }

    override suspend fun getMyNoticeInfo(): AccountNotice {
        val resp = ApiClient.api.getMyNoticeInfo()
        val body = resp.body() ?: throw ServiceException("Failed to get account")
        return body.data
    }

    override suspend fun updateNotice(payload: UpdateNoticeRequestBody) {
        ApiClient.api.updateNoticeInfo(payload)
    }

}