import { describe, it, afterEach, expect, $, $$, click, sleep, closeAll, csrf } from './runner.js?v=2';
import { state } from '../../js/modules/state.js';

// Helper: create a bucket with the given name and return its row.
async function makeBucket(name) {
    return fetch('api/buckets', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json', 'X-CSRF-Token': csrf() },
        body: JSON.stringify({ name }),
    }).then(r => r.json());
}

async function patchBucket(id, body) {
    const res = await fetch(`api/buckets/${id}`, {
        method: 'PATCH',
        headers: { 'Content-Type': 'application/json', 'X-CSRF-Token': csrf() },
        body: JSON.stringify(body),
    });
    return { status: res.status, body: await res.json() };
}

async function deleteBucket(id) {
    return fetch(`api/buckets/${id}`, {
        method: 'DELETE',
        headers: { 'X-CSRF-Token': csrf() },
    }).then(r => r.json());
}

async function getBuckets() {
    return fetch('api/buckets').then(r => r.json());
}

describe('Super-buckets: API parent_id', () => {
    afterEach(async () => {
        // These tests don't touch state.activeBucket but the bar-rendering
        // suite below does — keep cleanup symmetric so reordering tests
        // doesn't introduce a regression.
        state.activeBucket = 'all';
        await closeAll();
    });

    it('PATCH parent_id nests one bucket under another', async () => {
        const parent = await makeBucket('__sb_parent_a__');
        const child  = await makeBucket('__sb_child_a__');
        const res = await patchBucket(child.id, { parent_id: parent.id });
        expect(res.status).toBe(200);
        const all = await getBuckets();
        const found = all.find(b => b.id === child.id);
        expect(found.parent_id).toBe(parent.id);
    });

    it('PATCH parent_id = null un-nests', async () => {
        const parent = await makeBucket('__sb_parent_b__');
        const child  = await makeBucket('__sb_child_b__');
        await patchBucket(child.id, { parent_id: parent.id });
        const res = await patchBucket(child.id, { parent_id: null });
        expect(res.status).toBe(200);
        const all = await getBuckets();
        const found = all.find(b => b.id === child.id);
        expect(found.parent_id).toBeFalsy();
    });

    it('refuses self as parent', async () => {
        const b = await makeBucket('__sb_self__');
        const res = await patchBucket(b.id, { parent_id: b.id });
        expect(res.status).toBe(400);
        expect(res.body.error).toContain('self');
    });

    it('refuses level 2 — bucket with own children cannot become a child', async () => {
        const grandparent = await makeBucket('__sb_grand__');
        const middle      = await makeBucket('__sb_middle__');
        const leaf        = await makeBucket('__sb_leaf__');
        // middle becomes a parent of leaf
        await patchBucket(leaf.id, { parent_id: middle.id });
        // Now try to make middle a child of grandparent — would create level 2
        const res = await patchBucket(middle.id, { parent_id: grandparent.id });
        expect(res.status).toBe(400);
        expect(res.body.error.toLowerCase()).toContain('children');
    });

    it('refuses nesting under a bucket that is itself a child', async () => {
        const parent = await makeBucket('__sb_parent_c__');
        const child  = await makeBucket('__sb_child_c__');
        const other  = await makeBucket('__sb_other_c__');
        await patchBucket(child.id, { parent_id: parent.id });
        // Try to nest `other` under `child` — child is already nested
        const res = await patchBucket(other.id, { parent_id: child.id });
        expect(res.status).toBe(400);
        expect(res.body.error.toLowerCase()).toContain('child');
    });

    it('DELETE on a parent un-nests its children back to top-level', async () => {
        const parent = await makeBucket('__sb_parent_d__');
        const c1     = await makeBucket('__sb_child_d1__');
        const c2     = await makeBucket('__sb_child_d2__');
        await patchBucket(c1.id, { parent_id: parent.id });
        await patchBucket(c2.id, { parent_id: parent.id });
        await deleteBucket(parent.id);
        const all = await getBuckets();
        const f1 = all.find(b => b.id === c1.id);
        const f2 = all.find(b => b.id === c2.id);
        expect(f1).toExist();
        expect(f2).toExist();
        expect(f1.parent_id).toBeFalsy();
        expect(f2.parent_id).toBeFalsy();
    });

    it('export → import preserves parent_id', async () => {
        const parent = await makeBucket('__sb_parent_e__');
        const child  = await makeBucket('__sb_child_e__');
        await patchBucket(child.id, { parent_id: parent.id });

        // Round-trip through export → replace-import
        const blob = await fetch('api/export').then(r => r.blob());
        const form = new FormData();
        form.append('file', blob, 'roundtrip.zip');
        await fetch('api/import', { method: 'POST', body: form, headers: { 'X-CSRF-Token': csrf() } });

        const all = await getBuckets();
        const p = all.find(b => b.name === '__sb_parent_e__');
        const c = all.find(b => b.name === '__sb_child_e__');
        expect(p).toExist();
        expect(c).toExist();
        expect(c.parent_id).toBe(p.id);
    });
});

describe('Super-buckets: Bar rendering', () => {
    afterEach(async () => {
        // Reset activeBucket — several tests in this suite set it to a
        // child id that wouldn't otherwise survive the run. Without this
        // reset, downstream tests that create cards with bucket_id=null
        // can't find them on the board (the activeBucket filter excludes
        // them) and start failing in nondeterministic order.
        state.activeBucket = 'all';
        document.getElementById('bucket-super-popover')?.remove();
        await closeAll();
    });

    it('a parent with one child renders a single super-tile in the bar', async () => {
        const parent = await makeBucket('__sb_render_parent__');
        const child  = await makeBucket('__sb_render_child__');
        await patchBucket(child.id, { parent_id: parent.id });
        await window._reloadAll?.();
        await sleep(200);

        // The super-tile carries data-bucket-super=<parent.id>; the child is
        // not rendered directly in the bar.
        const superTile = document.querySelector(`#bucket-bar [data-bucket-super="${parent.id}"]`);
        expect(superTile).toExist();
        const childTile = document.querySelector(`#bucket-bar [data-bucket="${child.id}"]:not(#bucket-super-popover [data-bucket])`);
        expect(childTile).toBe(null);
    });

    it('super-tile shows the parent name when no child is active', async () => {
        const parent = await makeBucket('__sb_label_parent__');
        const child  = await makeBucket('__sb_label_child__');
        await patchBucket(child.id, { parent_id: parent.id });
        // Reset active filter so the parent is the default shown member.
        state.activeBucket = 'all';
        await window._reloadAll?.();
        await sleep(200);

        const superTile = document.querySelector(`#bucket-bar [data-bucket-super="${parent.id}"]`);
        if (!superTile) return;
        expect(superTile.textContent).toContain('__sb_label_parent__');
    });

    it('super-tile relabels to the active child name when a child is selected', async () => {
        const parent = await makeBucket('__sb_active_parent__');
        const child  = await makeBucket('__sb_active_child__');
        await patchBucket(child.id, { parent_id: parent.id });
        state.activeBucket = String(child.id);
        await window._reloadAll?.();
        await sleep(200);

        const superTile = document.querySelector(`#bucket-bar [data-bucket-super="${parent.id}"]`);
        if (!superTile) return;
        expect(superTile.textContent).toContain('__sb_active_child__');
    });

    it('clicking the super-tile opens a popover with parent + child entries', async () => {
        const parent = await makeBucket('__sb_pop_parent__');
        const child1 = await makeBucket('__sb_pop_child1__');
        const child2 = await makeBucket('__sb_pop_child2__');
        await patchBucket(child1.id, { parent_id: parent.id });
        await patchBucket(child2.id, { parent_id: parent.id });
        await window._reloadAll?.();
        await sleep(200);

        const superTile = document.querySelector(`#bucket-bar [data-bucket-super="${parent.id}"]`);
        if (!superTile) return;
        click(superTile);
        await sleep(100);

        const popover = document.getElementById('bucket-super-popover');
        expect(popover).toExist();
        // Parent + 2 children = 3 entries
        const entries = popover.querySelectorAll('[data-bucket]');
        expect(entries.length).toBe(3);
        // All three names appear
        const text = popover.textContent;
        expect(text).toContain('__sb_pop_parent__');
        expect(text).toContain('__sb_pop_child1__');
        expect(text).toContain('__sb_pop_child2__');
    });

    it('clicking a child entry in the popover sets activeBucket', async () => {
        const parent = await makeBucket('__sb_act_parent__');
        const child  = await makeBucket('__sb_act_child__');
        await patchBucket(child.id, { parent_id: parent.id });
        await window._reloadAll?.();
        await sleep(200);

        const superTile = document.querySelector(`#bucket-bar [data-bucket-super="${parent.id}"]`);
        if (!superTile) return;
        click(superTile);
        await sleep(100);

        const childEntry = document.querySelector(`#bucket-super-popover [data-bucket="${child.id}"]`);
        expect(childEntry).toExist();
        click(childEntry);
        await sleep(150);

        expect(String(state.activeBucket)).toBe(String(child.id));
    });

    it('clicking the super-tile twice toggles the popover closed', async () => {
        const parent = await makeBucket('__sb_toggle_parent__');
        const child  = await makeBucket('__sb_toggle_child__');
        await patchBucket(child.id, { parent_id: parent.id });
        await window._reloadAll?.();
        await sleep(200);

        const superTile = document.querySelector(`#bucket-bar [data-bucket-super="${parent.id}"]`);
        if (!superTile) return;
        click(superTile);
        await sleep(100);
        expect(document.getElementById('bucket-super-popover')).toExist();
        click(superTile);
        await sleep(100);
        expect(document.getElementById('bucket-super-popover')).toBe(null);
    });

    it('regular bucket (no children) keeps its plain data-bucket tile', async () => {
        const plain = await makeBucket('__sb_plain__');
        await window._reloadAll?.();
        await sleep(200);
        const tile = document.querySelector(`#bucket-bar [data-bucket="${plain.id}"]`);
        expect(tile).toExist();
        // Plain tile is NOT a super-tile
        expect(tile.classList.contains('bucket-super')).toBe(false);
    });
});

describe('Super-buckets: Drop cursor', () => {
    afterEach(() => closeAll());

    it('#bucket-drop-cursor element exists in the bar', async () => {
        // Force a fresh render so the cursor element is appended
        await window._reloadAll?.();
        await sleep(100);
        const cursor = document.querySelector('#bucket-bar #bucket-drop-cursor');
        expect(cursor).toExist();
        // Hidden by default
        expect(cursor.style.display === 'none' || cursor.style.display === '').toBe(true);
    });
});