/**
 * ICD Test Runner — SDK Tier
 * Validates switchboard-sdk.js contract: boot, identity, REST client,
 * events, theme, pipe registration, execution ordering, scoping,
 * halt semantics, error isolation, extension compat shim, introspection.
 */
(function () {
  'use strict';
  var T = window.ICD;
  if (!T) return;

  // ── Helpers ─────────────────────────────────────────────────

  /** Create a temporary direct channel for pipe tests. Returns channel object. */
  async function _createTestChannel(tag) {
    var title = 'sdk-test-' + tag + '-' + Date.now();
    var ch = await T.apiPost('/channels', { title: title, type: 'direct' });
    T.cleanup.push(function () { return T.apiDelete('/channels/' + ch.id).catch(function () {}); });
    return ch;
  }

  /**
   * Clear all SDK pipe filters between tests.
   * The SDK stores filters in closure-scoped arrays; we reach them
   * through sw.pipe.list() and re-init by registering a clear flag.
   * In practice we just note that tests accumulate filters — ordering
   * tests carefully so later tests expect earlier filters to exist.
   */

  // ── Tier ────────────────────────────────────────────────────

  T.runSdk = async function () {

    // ═══════════════════════════════════════════════════════════
    //  BOOT
    // ═══════════════════════════════════════════════════════════

    await T.test('sdk', 'boot', 'Switchboard.init() returns sw object', async function () {
      T.assert(typeof Switchboard !== 'undefined', 'Switchboard global missing');
      var inst = Switchboard.init();
      T.assert(inst !== null && typeof inst === 'object', 'init() should return object');
      T.assert(inst === window.sw, 'window.sw should be the same instance');
    });

    await T.test('sdk', 'boot', 'Double init returns same instance', async function () {
      var a = Switchboard.init();
      var b = Switchboard.init();
      T.assert(a === b, 'idempotent: must return same object');
    });

    // ═══════════════════════════════════════════════════════════
    //  IDENTITY
    // ═══════════════════════════════════════════════════════════

    await T.test('sdk', 'identity', 'sw.user populated', async function () {
      T.assert(sw.user !== null, 'sw.user should not be null');
      T.assert(typeof sw.user.id === 'string' && sw.user.id.length > 0, 'user.id');
      T.assert(typeof sw.user.username === 'string', 'user.username');
      T.assert(typeof sw.user.role === 'string', 'user.role');
    });

    await T.test('sdk', 'identity', 'sw.isAdmin reflects role', async function () {
      T.assert(typeof sw.isAdmin === 'boolean', 'isAdmin should be boolean');
      T.assert(sw.isAdmin === (sw.user.role === 'admin'), 'isAdmin should match role');
    });

    // ═══════════════════════════════════════════════════════════
    //  REST CLIENT
    // ═══════════════════════════════════════════════════════════

    await T.test('sdk', 'api', 'sw.api.get /health', async function () {
      var d = await sw.api.get('/api/v1/health');
      T.assert(d.status === 'ok', 'health status should be ok');
    });

    await T.test('sdk', 'api', 'sw.api.get /channels returns envelope', async function () {
      var d = await sw.api.get('/api/v1/channels');
      T.assertHasKey(d, 'data', '/channels');
      T.assert(Array.isArray(d.data), 'data should be array');
    });

    var _sdkTestChannel = null;

    await T.test('sdk', 'api', 'sw.api.post creates channel', async function () {
      var d = await sw.api.post('/api/v1/channels', {
        title: 'sdk-api-test-' + Date.now(), type: 'direct'
      });
      T.assert(typeof d.id === 'string', 'created channel should have id');
      _sdkTestChannel = d;
      T.cleanup.push(function () { return T.apiDelete('/channels/' + d.id).catch(function () {}); });
    });

    await T.test('sdk', 'api', 'sw.api.del removes channel', async function () {
      if (!_sdkTestChannel) throw new Error('no channel from previous test');
      // Create a throwaway channel to delete
      var d = await sw.api.post('/api/v1/channels', {
        title: 'sdk-del-test-' + Date.now(), type: 'direct'
      });
      await sw.api.del('/api/v1/channels/' + d.id);
      // Verify it's gone
      try {
        await sw.api.get('/api/v1/channels/' + d.id);
        throw new Error('channel should be deleted');
      } catch (e) {
        if (e.message === 'channel should be deleted') throw e;
        // Expected: 404 or error
      }
    });

    // ═══════════════════════════════════════════════════════════
    //  EVENTS
    // ═══════════════════════════════════════════════════════════

    await T.test('sdk', 'events', 'sw.on receives sw.emit', async function () {
      var received = null;
      var unsub = sw.on('sdk.test.ping', function (payload) { received = payload; });
      sw.emit('sdk.test.ping', { v: 42 }, { localOnly: true });
      T.assert(received !== null, 'handler should have fired');
      T.assert(received.v === 42, 'payload should match');
      unsub();
    });

    await T.test('sdk', 'events', 'sw.once fires exactly once', async function () {
      var count = 0;
      sw.once('sdk.test.once', function () { count++; });
      sw.emit('sdk.test.once', {}, { localOnly: true });
      sw.emit('sdk.test.once', {}, { localOnly: true });
      T.assert(count === 1, 'expected 1, got ' + count);
    });

    await T.test('sdk', 'events', 'sw.off stops delivery', async function () {
      var count = 0;
      var fn = function () { count++; };
      sw.on('sdk.test.off', fn);
      sw.emit('sdk.test.off', {}, { localOnly: true });
      T.assert(count === 1, 'should fire once before off');
      sw.off('sdk.test.off', fn);
      sw.emit('sdk.test.off', {}, { localOnly: true });
      T.assert(count === 1, 'should not fire after off');
    });

    // ═══════════════════════════════════════════════════════════
    //  THEME
    // ═══════════════════════════════════════════════════════════

    await T.test('sdk', 'theme', 'sw.theme.current returns dark or light', async function () {
      var c = sw.theme.current;
      T.assert(c === 'dark' || c === 'light', 'expected dark|light, got ' + c);
    });

    await T.test('sdk', 'theme', 'sw.theme.mode returns preference', async function () {
      var m = sw.theme.mode;
      T.assert(m === 'dark' || m === 'light' || m === 'system', 'expected dark|light|system, got ' + m);
    });

    await T.test('sdk', 'theme', 'sw.theme.on change fires', async function () {
      var fired = false;
      var unsub = sw.theme.on('change', function (resolved) {
        fired = true;
        T.assert(resolved === 'dark' || resolved === 'light', 'resolved should be dark|light');
      });
      // Trigger a theme change event
      Events.emit('theme.changed', {}, { localOnly: true });
      T.assert(fired, 'change handler should have fired');
      unsub();
    });

    // ═══════════════════════════════════════════════════════════
    //  PIPE REGISTRATION
    // ═══════════════════════════════════════════════════════════

    await T.test('sdk', 'pipe', 'sw.pipe.pre registers', async function () {
      sw.pipe.pre(100, function (ctx) { return ctx; }, { source: '_test-pre' });
      var list = sw.pipe.list();
      var found = list.pre.some(function (f) { return f.source === '_test-pre'; });
      T.assert(found, '_test-pre should appear in pipe.list().pre');
    });

    await T.test('sdk', 'pipe', 'sw.pipe.stream registers', async function () {
      sw.pipe.stream(100, function (ctx) { return ctx; }, { source: '_test-stream' });
      var list = sw.pipe.list();
      var found = list.stream.some(function (f) { return f.source === '_test-stream'; });
      T.assert(found, '_test-stream should appear in pipe.list().stream');
    });

    await T.test('sdk', 'pipe', 'sw.pipe.render registers', async function () {
      sw.pipe.render(100, function (ctx) { return ctx; }, { source: '_test-render' });
      var list = sw.pipe.list();
      var found = list.render.some(function (f) { return f.source === '_test-render'; });
      T.assert(found, '_test-render should appear in pipe.list().render');
    });

    await T.test('sdk', 'pipe', 'Scoped filter registers with scope', async function () {
      sw.pipe.pre(101, function (ctx) { return ctx; }, {
        source: '_test-scoped',
        scope: { channelType: ['workflow'] }
      });
      var list = sw.pipe.list();
      var entry = list.pre.find(function (f) { return f.source === '_test-scoped'; });
      T.assert(entry !== undefined, 'scoped filter should be in list');
      T.assert(entry.scope !== null, 'scope should be set');
      T.assert(Array.isArray(entry.scope.channelType), 'scope.channelType should be array');
      T.assert(entry.scope.channelType[0] === 'workflow', 'should be scoped to workflow');
    });

    await T.test('sdk', 'pipe', 'Priority ordering', async function () {
      sw.pipe.render(5, function (ctx) { return ctx; }, { source: '_test-priority-5' });
      sw.pipe.render(99, function (ctx) { return ctx; }, { source: '_test-priority-99' });
      var list = sw.pipe.list();
      var idx5 = -1, idx99 = -1;
      for (var i = 0; i < list.render.length; i++) {
        if (list.render[i].source === '_test-priority-5') idx5 = i;
        if (list.render[i].source === '_test-priority-99') idx99 = i;
      }
      T.assert(idx5 >= 0 && idx99 >= 0, 'both filters should exist');
      T.assert(idx5 < idx99, 'priority 5 should come before priority 99');
    });

    // ═══════════════════════════════════════════════════════════
    //  PIPE EXECUTION — PRE-SEND
    // ═══════════════════════════════════════════════════════════

    await T.test('sdk', 'pipe-pre', 'Filter mutates context', async function () {
      sw.pipe.pre(1, function (ctx) {
        ctx.metadata.sdk_test = 'injected';
        return ctx;
      }, { source: '_test-mutate' });

      // Simulate _runPre with a fake context
      var ctx = {
        message: 'hello', channel: { id: 'fake', type: 'direct', title: '' },
        attachments: [], model: 'test', persona: null,
        metadata: {}, regenerate: false, regenerateMessageId: null
      };
      var result = sw.pipe._runPre(ctx);
      T.assert(result !== null, 'should not halt');
      T.assert(result.metadata.sdk_test === 'injected', 'metadata should be mutated');
    });

    await T.test('sdk', 'pipe-pre', 'Halt filter returns null', async function () {
      sw.pipe.pre(0, function (ctx) {
        if (ctx.metadata._halt_test) return null;
        return ctx;
      }, { source: '_test-halt' });

      var ctx = {
        message: 'halt me', channel: { id: 'fake', type: 'direct', title: '' },
        attachments: [], model: 'test', persona: null,
        metadata: { _halt_test: true }, regenerate: false, regenerateMessageId: null
      };
      var result = sw.pipe._runPre(ctx);
      T.assert(result === null, 'chain should be halted');
    });

    await T.test('sdk', 'pipe-pre', 'Error isolation — filter throws, chain continues', async function () {
      sw.pipe.pre(2, function (ctx) {
        if (ctx.metadata._throw_test) throw new Error('intentional');
        return ctx;
      }, { source: '_test-throw' });

      sw.pipe.pre(3, function (ctx) {
        ctx.metadata.after_throw = true;
        return ctx;
      }, { source: '_test-after-throw' });

      var ctx = {
        message: 'test', channel: { id: 'fake', type: 'direct', title: '' },
        attachments: [], model: 'test', persona: null,
        metadata: { _throw_test: true }, regenerate: false, regenerateMessageId: null
      };
      var result = sw.pipe._runPre(ctx);
      T.assert(result !== null, 'chain should not halt on throw');
      T.assert(result.metadata.after_throw === true, 'subsequent filter should have run');

      // Verify error was counted
      var list = sw.pipe.list();
      var entry = list.pre.find(function (f) { return f.source === '_test-throw'; });
      T.assert(entry && entry.errors > 0, 'error count should be > 0');
    });

    // ═══════════════════════════════════════════════════════════
    //  PIPE EXECUTION — STREAM
    // ═══════════════════════════════════════════════════════════

    await T.test('sdk', 'pipe-stream', 'Stream filter counts chunks', async function () {
      var counter = 0;
      sw.pipe.stream(1, function (ctx) {
        if (ctx.channel.id === '_stream_test') counter++;
        return ctx;
      }, { source: '_test-stream-counter' });

      // Simulate 3 chunks
      for (var i = 0; i < 3; i++) {
        sw.pipe._runStream({
          chunk: 'word' + i + ' ', accumulated: '',
          channel: { id: '_stream_test', type: 'direct' },
          model: 'test', event: 'content', tokens: { input: 0, output: 0 }
        });
      }
      T.assert(counter === 3, 'expected 3 chunk calls, got ' + counter);
    });

    await T.test('sdk', 'pipe-stream', 'Stream filter modifies accumulated', async function () {
      sw.pipe.stream(2, function (ctx) {
        if (ctx.channel.id === '_accum_test') {
          ctx.accumulated = ctx.accumulated.toUpperCase();
        }
        return ctx;
      }, { source: '_test-stream-accum' });

      var result = sw.pipe._runStream({
        chunk: 'hello', accumulated: 'hello world',
        channel: { id: '_accum_test', type: 'direct' },
        model: 'test', event: 'content', tokens: { input: 0, output: 0 }
      });
      T.assert(result.accumulated === 'HELLO WORLD', 'accumulated should be uppercased');
    });

    await T.test('sdk', 'pipe-stream', 'Null drops chunk', async function () {
      sw.pipe.stream(0, function (ctx) {
        if (ctx.channel.id === '_drop_test') return null;
        return ctx;
      }, { source: '_test-stream-drop' });

      var result = sw.pipe._runStream({
        chunk: 'x', accumulated: 'x',
        channel: { id: '_drop_test', type: 'direct' },
        model: 'test', event: 'content', tokens: { input: 0, output: 0 }
      });
      T.assert(result === null, 'should return null for dropped chunk');
    });

    // ═══════════════════════════════════════════════════════════
    //  PIPE EXECUTION — RENDER
    // ═══════════════════════════════════════════════════════════

    await T.test('sdk', 'pipe-render', 'Render filter modifies DOM', async function () {
      sw.pipe.render(1, function (ctx) {
        if (ctx.element.dataset.sdkRenderTest) {
          ctx.element.classList.add('sdk-render-modified');
        }
        return ctx;
      }, { source: '_test-render-dom' });

      var el = document.createElement('div');
      el.dataset.sdkRenderTest = 'true';
      sw.pipe._runRender({
        element: el, message: null,
        channel: { id: 'fake', type: 'direct' }
      });
      T.assert(el.classList.contains('sdk-render-modified'), 'element should have class');
    });

    await T.test('sdk', 'pipe-render', 'Priority ordering in render chain', async function () {
      var order = [];
      sw.pipe.render(10, function (ctx) {
        if (ctx.element.dataset.sdkOrderTest) order.push('A');
        return ctx;
      }, { source: '_test-render-order-A' });
      sw.pipe.render(20, function (ctx) {
        if (ctx.element.dataset.sdkOrderTest) order.push('B');
        return ctx;
      }, { source: '_test-render-order-B' });

      var el = document.createElement('div');
      el.dataset.sdkOrderTest = 'true';
      sw.pipe._runRender({
        element: el, message: null,
        channel: { id: 'fake', type: 'direct' }
      });
      T.assert(order.length >= 2, 'both filters should run');
      var idxA = order.indexOf('A');
      var idxB = order.indexOf('B');
      T.assert(idxA < idxB, 'A (p=10) should run before B (p=20)');
    });

    // ═══════════════════════════════════════════════════════════
    //  PIPE SCOPING
    // ═══════════════════════════════════════════════════════════

    await T.test('sdk', 'pipe-scope', 'Scoped filter skips non-matching channel', async function () {
      var ran = false;
      sw.pipe.pre(200, function (ctx) {
        ran = true; return ctx;
      }, { source: '_test-scope-skip', scope: { channelType: ['workflow'] } });

      sw.pipe._runPre({
        message: 'test', channel: { id: 'x', type: 'direct', title: '' },
        attachments: [], model: 'test', persona: null,
        metadata: {}, regenerate: false, regenerateMessageId: null
      });
      T.assert(!ran, 'scoped-to-workflow filter should NOT run on direct channel');
    });

    await T.test('sdk', 'pipe-scope', 'Scoped filter runs on matching channel', async function () {
      var ran = false;
      sw.pipe.pre(201, function (ctx) {
        ran = true; return ctx;
      }, { source: '_test-scope-match', scope: { channelType: ['dm', 'direct'] } });

      sw.pipe._runPre({
        message: 'test', channel: { id: 'x', type: 'direct', title: '' },
        attachments: [], model: 'test', persona: null,
        metadata: {}, regenerate: false, regenerateMessageId: null
      });
      T.assert(ran, 'scoped-to-direct filter should run on direct channel');
    });

    await T.test('sdk', 'pipe-scope', 'Unscoped filter runs on all channels', async function () {
      var count = 0;
      sw.pipe.pre(202, function (ctx) {
        count++; return ctx;
      }, { source: '_test-scope-all' });

      sw.pipe._runPre({
        message: 'a', channel: { id: 'x', type: 'direct', title: '' },
        attachments: [], model: 'test', persona: null,
        metadata: {}, regenerate: false, regenerateMessageId: null
      });
      sw.pipe._runPre({
        message: 'b', channel: { id: 'x', type: 'workflow', title: '' },
        attachments: [], model: 'test', persona: null,
        metadata: {}, regenerate: false, regenerateMessageId: null
      });
      T.assert(count >= 2, 'unscoped filter should run on both channel types');
    });

    // ═══════════════════════════════════════════════════════════
    //  EXTENSION COMPAT SHIM
    // ═══════════════════════════════════════════════════════════

    await T.test('sdk', 'compat', 'ctx.renderers.register post → pipe.list() [chat-only]', async function () {
      // This tests the compat shim in extensions.js.
      // Extensions only loads on the chat surface (scripts-chat template).
      if (typeof Extensions === 'undefined') {
        T.skip('Extensions only loads on chat surface — run SDK tier from /chat to test compat shim');
      }
      var shimName = '_sdk-compat-test-' + Date.now();
      Extensions._registerRenderer('sdk-test', shimName, {
        type: 'post',
        priority: 77,
        render: function (container) { /* noop */ }
      });
      var list = sw.pipe.list();
      var found = list.render.some(function (f) {
        return f.source === 'sdk-test:' + shimName;
      });
      T.assert(found, 'shimmed post-renderer should appear in pipe.list().render');
    });

    // ═══════════════════════════════════════════════════════════
    //  INTROSPECTION
    // ═══════════════════════════════════════════════════════════

    await T.test('sdk', 'introspection', 'sw.pipe.list() shape', async function () {
      var list = sw.pipe.list();
      T.assertHasKey(list, 'pre', 'pipe.list');
      T.assertHasKey(list, 'stream', 'pipe.list');
      T.assertHasKey(list, 'render', 'pipe.list');
      T.assert(Array.isArray(list.pre), 'pre should be array');
      T.assert(Array.isArray(list.stream), 'stream should be array');
      T.assert(Array.isArray(list.render), 'render should be array');
    });

    await T.test('sdk', 'introspection', 'Stats populated after execution', async function () {
      var list = sw.pipe.list();
      // Find any filter with calls > 0 (previous tests should have run some)
      var anyRun = false;
      ['pre', 'stream', 'render'].forEach(function (stage) {
        list[stage].forEach(function (f) {
          if (f.calls > 0) anyRun = true;
        });
      });
      T.assert(anyRun, 'at least one filter should have calls > 0 from previous tests');
    });

    await T.test('sdk', 'introspection', 'Stats include avgMs and errors', async function () {
      var list = sw.pipe.list();
      var entry = list.pre.find(function (f) { return f.calls > 0; });
      if (!entry) throw new Error('no filter with calls > 0');
      T.assert(typeof entry.avgMs === 'number', 'avgMs should be number');
      T.assert(typeof entry.errors === 'number', 'errors should be number');
      T.assert(typeof entry.source === 'string', 'source should be string');
      T.assert(typeof entry.priority === 'number', 'priority should be number');
    });

    await T.test('sdk', 'introspection', 'Scoped filter shows scope in list', async function () {
      var list = sw.pipe.list();
      var scoped = list.pre.find(function (f) { return f.source === '_test-scoped'; });
      T.assert(scoped, '_test-scoped filter should exist');
      T.assert(scoped.scope !== null && scoped.scope !== undefined, 'scope should be set');
    });

    await T.test('sdk', 'introspection', 'Unscoped filter shows null scope', async function () {
      var list = sw.pipe.list();
      var unscoped = list.pre.find(function (f) { return f.source === '_test-pre'; });
      T.assert(unscoped, '_test-pre filter should exist');
      T.assert(unscoped.scope === null, 'scope should be null for unscoped filter');
    });
  };
})();