// Artist detail page.
//
// Mirrors the Svelte ArtistDetailView: back button, an artist header
// (circular portrait, name, biography, action buttons), a Popular
// Tracks list, and a Discography carousel. Data comes from the
// ArtistState global; action buttons are visual for now.

import { Theme } from "../foundation/semantic-colors.slint";
import { Typography } from "../foundation/typography.slint";
import { ArtistState, AlbumTrackItem, DiscoverSection, NavState, ContentView } from "../state.slint";
import { QbzIcon } from "../primitives/QbzIcon.slint";
import { Carousel } from "../discover/Carousel.slint";
import { ScrollView } from "std-widgets.slint";

component CircleAction inherits Rectangle {
    in property <image> icon;
    in property <bool> primary: false;
    in property <length> diameter: 40px;
    callback clicked();

    width: root.diameter;
    height: root.diameter;
    border-radius: root.diameter / 2;
    background: root.primary
        ? (ta.has-hover ? Theme.accent-hover : Theme.accent)
        : (ta.has-hover ? Theme.surface-hover : Theme.surface-elevated);

    QbzIcon {
        source: root.icon;
        width: 17px;
        height: 17px;
        x: (parent.width - self.width) / 2;
        y: (parent.height - self.height) / 2;
        tint: root.primary ? Theme.accent-text : Theme.text-secondary;
    }

    ta := TouchArea {
        mouse-cursor: pointer;
        clicked => {
            root.clicked();
        }
    }
}

component TrackRow inherits Rectangle {
    in property <AlbumTrackItem> track;
    in property <int> index;

    height: 52px;
    border-radius: 8px;
    background: ta.has-hover
        ? Theme.surface-hover
        : (Math.mod(root.index, 2) == 1 ? Theme.surface-card : transparent);

    HorizontalLayout {
        padding-left: 12px;
        padding-right: 12px;
        spacing: 16px;

        Text {
            text: root.track.number;
            width: 28px;
            color: Theme.text-muted;
            font-size: Typography.body;
            vertical-alignment: center;
        }
        VerticalLayout {
            alignment: center;
            horizontal-stretch: 1;
            Text {
                text: root.track.title;
                color: Theme.text-primary;
                font-size: Typography.body;
                font-weight: Typography.medium;
                overflow: elide;
            }
        }
        Text {
            text: root.track.duration;
            width: 70px;
            color: Theme.text-muted;
            font-size: Typography.body;
            horizontal-alignment: center;
            vertical-alignment: center;
        }
        Text {
            text: root.track.quality-tier == "hires"
                ? "Hi-Res"
                : (root.track.quality-tier == "cd" ? "CD" : "");
            width: 70px;
            color: Theme.text-muted;
            font-size: Typography.legal;
            horizontal-alignment: center;
            vertical-alignment: center;
        }
    }

    ta := TouchArea {
        mouse-cursor: pointer;
    }
}

export component ArtistPageView inherits Rectangle {
    callback open-album(string);

    background: Theme.surface-main;

    ScrollView {
        horizontal-scrollbar-policy: ScrollBarPolicy.always-off;
        VerticalLayout {
            padding-left: 24px;
            padding-right: 24px;
            padding-top: 14px;
            padding-bottom: 100px;
            spacing: 0px;
            alignment: start;

            // --- Back button -------------------------------------------------
            back := TouchArea {
                width: back-row.preferred-width;
                height: 28px;
                mouse-cursor: pointer;
                clicked => {
                    NavState.view = ContentView.home;
                }
                back-row := HorizontalLayout {
                    spacing: 6px;
                    VerticalLayout {
                        alignment: center;
                        QbzIcon {
                            source: @image-url("../assets/icons/arrow-left.svg");
                            width: 16px;
                            height: 16px;
                            tint: back.has-hover ? Theme.text-secondary : Theme.text-muted;
                        }
                    }
                    Text {
                        text: @tr("Back");
                        color: back.has-hover ? Theme.text-secondary : Theme.text-muted;
                        font-size: Typography.body;
                        vertical-alignment: center;
                    }
                }
            }

            Rectangle { height: 22px; }

            // --- Artist header -----------------------------------------------
            HorizontalLayout {
                spacing: 32px;
                alignment: start;

                Rectangle {
                    width: 200px;
                    height: 200px;
                    border-radius: 100px;
                    background: Theme.surface-elevated;
                    drop-shadow-blur: 32px;
                    drop-shadow-color: #00000080;
                    drop-shadow-offset-y: 8px;
                    clip: true;
                    Image {
                        width: 100%;
                        height: 100%;
                        source: ArtistState.artwork;
                        image-fit: cover;
                    }
                }

                VerticalLayout {
                    alignment: start;
                    padding-top: 8px;
                    spacing: 0px;
                    horizontal-stretch: 1;

                    Text {
                        text: ArtistState.name;
                        color: Theme.text-primary;
                        font-size: Typography.title;
                        font-weight: Typography.bold;
                        overflow: elide;
                    }
                    Rectangle { height: 12px; }
                    Text {
                        text: ArtistState.bio;
                        visible: ArtistState.bio != "";
                        color: Theme.text-secondary;
                        font-size: Typography.body;
                        wrap: word-wrap;
                    }
                    Rectangle { height: 20px; }
                    HorizontalLayout {
                        alignment: start;
                        spacing: 12px;
                        CircleAction {
                            icon: @image-url("../assets/icons/play.svg");
                            primary: true;
                            diameter: 44px;
                        }
                        VerticalLayout {
                            alignment: center;
                            CircleAction { icon: @image-url("../assets/icons/shuffle.svg"); }
                        }
                        VerticalLayout {
                            alignment: center;
                            CircleAction { icon: @image-url("../assets/icons/heart.svg"); }
                        }
                        VerticalLayout {
                            alignment: center;
                            CircleAction { icon: @image-url("../assets/icons/cast.svg"); }
                        }
                    }
                }
            }

            Rectangle { height: 32px; }

            if ArtistState.loading && ArtistState.top-tracks.length == 0: Text {
                text: @tr("Loading artist...");
                color: Theme.text-muted;
                font-size: Typography.body;
            }

            // --- Popular tracks ----------------------------------------------
            if ArtistState.top-tracks.length > 0: Text {
                text: @tr("Popular Tracks");
                color: Theme.text-primary;
                font-size: Typography.heading;
                font-weight: Typography.semibold;
            }
            if ArtistState.top-tracks.length > 0: Rectangle { height: 10px; }
            for track[index] in ArtistState.top-tracks: TrackRow {
                track: track;
                index: index;
            }

            // --- Discography -------------------------------------------------
            if ArtistState.releases.length > 0: Rectangle { height: 28px; }
            if ArtistState.releases.length > 0: Carousel {
                section: {
                    title: @tr("Discography"),
                    albums: ArtistState.releases,
                };
                album-clicked(id) => {
                    root.open-album(id);
                }
            }
        }
    }
}