import SwiftUI

struct CreatorChannelTitleBar: View {
    let nickname: String
    let isFollow: Bool
    let isNotify: Bool
    let backgroundProgress: CGFloat
    let showsCreatorActions: Bool
    let onTapBack: () -> Void
    let onTapFollow: () -> Void
    let onTapUnfollow: () -> Void
    let onTapNotify: () -> Void
    let onTapUnnotify: () -> Void
    let onTapMore: () -> Void

    init(
        nickname: String,
        isFollow: Bool,
        isNotify: Bool,
        backgroundProgress: CGFloat,
        showsCreatorActions: Bool = true,
        onTapBack: @escaping () -> Void,
        onTapFollow: @escaping () -> Void,
        onTapUnfollow: @escaping () -> Void,
        onTapNotify: @escaping () -> Void,
        onTapUnnotify: @escaping () -> Void,
        onTapMore: @escaping () -> Void
    ) {
        self.nickname = nickname
        self.isFollow = isFollow
        self.isNotify = isNotify
        self.backgroundProgress = backgroundProgress
        self.showsCreatorActions = showsCreatorActions
        self.onTapBack = onTapBack
        self.onTapFollow = onTapFollow
        self.onTapUnfollow = onTapUnfollow
        self.onTapNotify = onTapNotify
        self.onTapUnnotify = onTapUnnotify
        self.onTapMore = onTapMore
    }

    var body: some View {
        HStack(spacing: SodaSpacing.s12) {
            Button(action: onTapBack) {
                Image("ic_new_bar_back")
                    .resizable()
                    .frame(width: 24, height: 24)
            }
            .buttonStyle(.plain)

            Text(nickname)
                .appFont(.heading2)
                .foregroundColor(Color.white)
                .lineLimit(1)
                .truncationMode(.tail)
                .opacity(backgroundProgress >= 1 ? 1 : 0)
                .frame(maxWidth: .infinity, alignment: .leading)

            if showsCreatorActions {
                HStack(spacing: SodaSpacing.s14) {
                    followButton

                    if isFollow {
                        notifyButton
                    }

                    Button(action: onTapMore) {
                        Image("ic_new_more")
                            .resizable()
                            .frame(width: 24, height: 24)
                    }
                    .buttonStyle(.plain)
                }
                .layoutPriority(1)
            }
        }
        .padding(.horizontal, SodaSpacing.s14)
        .frame(height: 56)
        .background(Color.black.opacity(max(0, min(backgroundProgress, 1))))
    }

    private var followButton: some View {
        Button(action: isFollow ? onTapUnfollow : onTapFollow) {
            HStack(spacing: SodaSpacing.s6) {
                Image(isFollow ? "ic_new_following" : "ic_new_follow")
                    .resizable()
                    .renderingMode(.template)
                    .foregroundColor(isFollow ? Color.black : Color.white)
                    .frame(width: 20, height: 20)

                if isFollow == false {
                    Text(I18n.CreatorChannelHome.follow)
                        .appFont(size: 16, weight: .medium)
                        .foregroundColor(Color.white)
                }
            }
            .frame(width: isFollow ? 36 : nil, height: 36)
            .padding(.horizontal, isFollow ? 0 : SodaSpacing.s12)
            .background(isFollow ? Color.white : Color.clear)
            .clipShape(Capsule())
        }
        .accessibilityLabel(isFollow ? I18n.CreatorChannelHome.following : "팔로우")
        .buttonStyle(.plain)
    }

    private var notifyButton: some View {
        Button(action: isNotify ? onTapUnnotify : onTapNotify) {
            Image(isNotify ? "ic_bar_bell_colored" : "ic_bar_bell")
                .resizable()
                .frame(width: 24, height: 24)
                .frame(width: 36, height: 36)
        }
        .buttonStyle(.plain)
    }
}

struct CreatorChannelTitleBar_Previews: PreviewProvider {
    static var previews: some View {
        VStack(spacing: SodaSpacing.s16) {
            CreatorChannelTitleBar(
                nickname: "Soda Creator Long Nickname Soda Creator Long Nickname",
                isFollow: false,
                isNotify: false,
                backgroundProgress: 1,
                showsCreatorActions: true,
                onTapBack: {},
                onTapFollow: {},
                onTapUnfollow: {},
                onTapNotify: {},
                onTapUnnotify: {},
                onTapMore: {}
            )

            CreatorChannelTitleBar(
                nickname: "Soda Creator",
                isFollow: true,
                isNotify: true,
                backgroundProgress: 1,
                showsCreatorActions: true,
                onTapBack: {},
                onTapFollow: {},
                onTapUnfollow: {},
                onTapNotify: {},
                onTapUnnotify: {},
                onTapMore: {}
            )

            CreatorChannelTitleBar(
                nickname: "Soda Creator",
                isFollow: true,
                isNotify: false,
                backgroundProgress: 1,
                showsCreatorActions: true,
                onTapBack: {},
                onTapFollow: {},
                onTapUnfollow: {},
                onTapNotify: {},
                onTapUnnotify: {},
                onTapMore: {}
            )

            CreatorChannelTitleBar(
                nickname: "Soda Creator",
                isFollow: true,
                isNotify: true,
                backgroundProgress: 1,
                showsCreatorActions: false,
                onTapBack: {},
                onTapFollow: {},
                onTapUnfollow: {},
                onTapNotify: {},
                onTapUnnotify: {},
                onTapMore: {}
            )
        }
        .background(Color.gray)
        .previewLayout(.sizeThatFits)
    }
}