"""
Tests for #1228 — model picker loses provider identity when multiple
providers expose the same model ID.

Covers:
- _deduplicate_model_ids() post-process in api/config.py
- Frontend norm() regex in ui.js that strips @provider: prefixes
"""
import copy
import unittest


class TestDeduplicateModelIds(unittest.TestCase):
    """Backend: _deduplicate_model_ids() in api/config.py"""

    def _call(self, groups):
        from api.config import _deduplicate_model_ids
        groups = copy.deepcopy(groups)
        _deduplicate_model_ids(groups)
        return groups

    # ── No collision ────────────────────────────────────────────────

    def test_unique_ids_unchanged(self):
        """When all model IDs are unique across groups, nothing changes."""
        groups = [
            {"provider": "Anthropic", "provider_id": "anthropic", "models": [
                {"id": "claude-sonnet-4.6", "label": "Claude Sonnet 4.6"},
            ]},
            {"provider": "OpenAI", "provider_id": "openai-codex", "models": [
                {"id": "gpt-5.4", "label": "GPT-5.4"},
            ]},
        ]
        result = self._call(groups)
        assert result[0]["models"][0]["id"] == "claude-sonnet-4.6"
        assert result[1]["models"][0]["id"] == "gpt-5.4"

    def test_single_group_unchanged(self):
        """A single group never triggers deduplication."""
        groups = [
            {"provider": "Anthropic", "provider_id": "anthropic", "models": [
                {"id": "claude-sonnet-4.6", "label": "Claude Sonnet 4.6"},
                {"id": "claude-opus-4.6", "label": "Claude Opus 4.6"},
            ]},
        ]
        result = self._call(groups)
        ids = [m["id"] for m in result[0]["models"]]
        assert "claude-sonnet-4.6" in ids
        assert "claude-opus-4.6" in ids

    def test_empty_groups(self):
        """Empty groups list is a no-op."""
        result = self._call([])
        assert result == []

    # ── Collision: two providers, same bare model ID ────────────────

    def test_two_providers_same_model_prefixes_second(self):
        """When two providers share the same bare model ID, the second
        gets @provider_id: prefix and a disambiguated label."""
        groups = [
            {"provider": "Edith", "provider_id": "custom:edith", "models": [
                {"id": "gpt-5.4", "label": "GPT-5.4"},
            ]},
            {"provider": "OpenAI Codex", "provider_id": "openai-codex", "models": [
                {"id": "gpt-5.4", "label": "GPT-5.4"},
            ]},
        ]
        result = self._call(groups)
        # First stays bare for backward compat
        assert result[0]["models"][0]["id"] == "gpt-5.4"
        assert result[0]["models"][0]["label"] == "GPT-5.4"
        # Second gets prefixed
        assert result[1]["models"][0]["id"] == "@openai-codex:gpt-5.4"
        assert "OpenAI Codex" in result[1]["models"][0]["label"]

    def test_three_providers_same_model(self):
        """With three providers sharing the same model, first stays bare,
        the other two get prefixed."""
        groups = [
            {"provider": "A", "provider_id": "alpha", "models": [
                {"id": "gpt-5.4", "label": "GPT-5.4"},
            ]},
            {"provider": "B", "provider_id": "beta", "models": [
                {"id": "gpt-5.4", "label": "GPT-5.4"},
            ]},
            {"provider": "C", "provider_id": "gamma", "models": [
                {"id": "gpt-5.4", "label": "GPT-5.4"},
            ]},
        ]
        result = self._call(groups)
        assert result[0]["models"][0]["id"] == "gpt-5.4"
        assert result[1]["models"][0]["id"] == "@beta:gpt-5.4"
        assert result[2]["models"][0]["id"] == "@gamma:gpt-5.4"

    # ── Already-prefixed IDs / slash IDs ───────────────────────────

    def test_already_prefixed_ids_and_unique_slash_ids_unchanged(self):
        """Already-qualified IDs stay untouched; unique slash IDs are still allowed."""
        groups = [
            {"provider": "Anthropic", "provider_id": "anthropic", "models": [
                {"id": "@anthropic:claude-sonnet-4.6", "label": "Claude Sonnet 4.6"},
            ]},
            {"provider": "OpenRouter", "provider_id": "openrouter", "models": [
                {"id": "anthropic/claude-sonnet-4.6", "label": "Claude Sonnet 4.6 (OR)"},
            ]},
        ]
        result = self._call(groups)
        assert result[0]["models"][0]["id"] == "@anthropic:claude-sonnet-4.6"
        assert result[1]["models"][0]["id"] == "anthropic/claude-sonnet-4.6"

    def test_two_providers_same_slash_qualified_model_prefixes_second(self):
        """Slash-qualified duplicates must also be made unique (#1313)."""
        groups = [
            {"provider": "Alpha", "provider_id": "custom:alpha", "models": [
                {"id": "google/gemma-4-27b", "label": "Gemma 4 27B"},
            ]},
            {"provider": "Beta", "provider_id": "custom:beta", "models": [
                {"id": "google/gemma-4-27b", "label": "Gemma 4 27B"},
            ]},
        ]
        result = self._call(groups)
        assert result[0]["models"][0]["id"] == "google/gemma-4-27b"
        assert result[1]["models"][0]["id"] == "@custom:beta:google/gemma-4-27b"
        assert result[1]["models"][0]["label"] == "Gemma 4 27B (Beta)"

    # ── Mixed: some unique, some colliding ─────────────────────────

    def test_mixed_unique_and_colliding(self):
        """Only colliding IDs get prefixed; unique ones stay bare."""
        groups = [
            {"provider": "Edith", "provider_id": "custom:edith", "models": [
                {"id": "gpt-5.4", "label": "GPT-5.4"},
                {"id": "claude-sonnet-4.6", "label": "Claude Sonnet 4.6"},
            ]},
            {"provider": "OpenAI Codex", "provider_id": "openai-codex", "models": [
                {"id": "gpt-5.4", "label": "GPT-5.4"},
                {"id": "o3-pro", "label": "O3 Pro"},
            ]},
        ]
        result = self._call(groups)
        # gpt-5.4 collides → second gets prefixed
        assert result[0]["models"][0]["id"] == "gpt-5.4"
        assert result[1]["models"][0]["id"] == "@openai-codex:gpt-5.4"
        # claude-sonnet-4.6 is unique → stays bare
        assert result[0]["models"][1]["id"] == "claude-sonnet-4.6"
        # o3-pro is unique → stays bare
        assert result[1]["models"][1]["id"] == "o3-pro"

    # ── Label disambiguation ────────────────────────────────────────

    def test_label_differs_from_id_when_custom_label(self):
        """When the original label differs from the bare ID, the
        disambiguated label preserves the custom label + adds provider."""
        groups = [
            {"provider": "Edith", "provider_id": "custom:edith", "models": [
                {"id": "gpt-5.4", "label": "GPT 5.4 Turbo"},
            ]},
            {"provider": "Codex", "provider_id": "openai-codex", "models": [
                {"id": "gpt-5.4", "label": "GPT 5.4 Standard"},
            ]},
        ]
        result = self._call(groups)
        assert result[0]["models"][0]["label"] == "GPT 5.4 Turbo"
        assert result[1]["models"][0]["label"] == "GPT 5.4 Standard (Codex)"

    def test_label_same_as_id_adds_provider_parenthetical(self):
        """When label == bare_id, the disambiguated label becomes
        'model_id (Provider Name)'."""
        groups = [
            {"provider": "Edith", "provider_id": "custom:edith", "models": [
                {"id": "gpt-5.4", "label": "gpt-5.4"},
            ]},
            {"provider": "OpenAI Codex", "provider_id": "openai-codex", "models": [
                {"id": "gpt-5.4", "label": "gpt-5.4"},
            ]},
        ]
        result = self._call(groups)
        assert result[0]["models"][0]["label"] == "gpt-5.4"
        assert result[1]["models"][0]["label"] == "gpt-5.4 (OpenAI Codex)"


class TestFrontendNormRegex(unittest.TestCase):
    """Frontend: norm() function in static/ui.js strips @provider: prefix."""

    @staticmethod
    def _read_js():
        import pathlib
        return (pathlib.Path(__file__).parent.parent / "static" / "ui.js").read_text()

    def _extract_norm(self):
        """Extract the norm() lambda from ui.js source."""
        src = self._read_js()
        # Find: const norm=s=>...;
        import re
        m = re.search(r"const norm=(s=>[^;]+);", src)
        assert m, "norm() not found in ui.js"
        return m.group(1)

    def test_norm_strips_nested_provider_prefix(self):
        """norm('@custom:edith:gpt-5.4') === norm('gpt-5.4')."""
        norm_js = self._extract_norm()
        import subprocess
        r1 = subprocess.run(["node", "-e", f"console.log(({norm_js})('gpt-5.4'))"], capture_output=True, text=True)
        r2 = subprocess.run(["node", "-e", f"console.log(({norm_js})('@custom:edith:gpt-5.4'))"], capture_output=True, text=True)
        assert r1.stdout.strip() == r2.stdout.strip(), f"{r1.stdout.strip()} != {r2.stdout.strip()}"

    def test_norm_strips_simple_provider_prefix(self):
        """norm('@openai-codex:gpt-5.4') === norm('gpt-5.4')."""
        norm_js = self._extract_norm()
        import subprocess
        r1 = subprocess.run(["node", "-e", f"console.log(({norm_js})('gpt-5.4'))"], capture_output=True, text=True)
        r2 = subprocess.run(["node", "-e", f"console.log(({norm_js})('@openai-codex:gpt-5.4'))"], capture_output=True, text=True)
        assert r1.stdout.strip() == r2.stdout.strip(), f"{r1.stdout.strip()} != {r2.stdout.strip()}"

    def test_norm_preserves_openrouter(self):
        """norm('openai/gpt-5.4') === norm('gpt-5.4') still works."""
        norm_js = self._extract_norm()
        import subprocess
        r1 = subprocess.run(["node", "-e", f"console.log(({norm_js})('gpt-5.4'))"], capture_output=True, text=True)
        r2 = subprocess.run(["node", "-e", f"console.log(({norm_js})('openai/gpt-5.4'))"], capture_output=True, text=True)
        assert r1.stdout.strip() == r2.stdout.strip(), f"{r1.stdout.strip()} != {r2.stdout.strip()}"

    def test_norm_preserves_minimax_prefix(self):
        """norm('@minimax:MiniMax-M2.7') === norm('minimax-m2.7') still works."""
        norm_js = self._extract_norm()
        import subprocess
        r1 = subprocess.run(["node", "-e", f"console.log(({norm_js})('minimax-m2.7'))"], capture_output=True, text=True)
        r2 = subprocess.run(["node", "-e", f"console.log(({norm_js})('@minimax:MiniMax-M2.7'))"], capture_output=True, text=True)
        assert r1.stdout.strip() == r2.stdout.strip(), f"{r1.stdout.strip()} != {r2.stdout.strip()}"


class TestFrontendPreferredProviderMatch(unittest.TestCase):
    """Frontend: provider-aware rehydration should prefer the saved provider."""

    @staticmethod
    def _read_js():
        import pathlib
        return (pathlib.Path(__file__).parent.parent / "static" / "ui.js").read_text()

    def test_find_model_prefers_matching_provider_for_slash_collision(self):
        import re
        import subprocess

        src = self._read_js()
        helper = re.search(r"function _getOptionProviderId\(opt\)\{.*?\n\}", src, re.S)
        finder = re.search(r"function _findModelInDropdown\(modelId, sel, preferredProviderId\)\{.*?\n\}", src, re.S)
        assert helper, "_getOptionProviderId() not found in ui.js"
        assert finder, "_findModelInDropdown() not found in ui.js"

        script = f"""
{helper.group(0)}
{finder.group(0)}
const sel = {{
  options: [
    {{ value: 'google/gemma-4-27b', parentElement: {{ tagName: 'OPTGROUP', dataset: {{ provider: 'custom:alpha' }} }} }},
    {{ value: '@custom:beta:google/gemma-4-27b', parentElement: {{ tagName: 'OPTGROUP', dataset: {{ provider: 'custom:beta' }} }} }},
  ]
}};
console.log(_findModelInDropdown('google/gemma-4-27b', sel, 'custom:beta') || '');
"""
        resolved = subprocess.run(["node", "-e", script], capture_output=True, text=True, check=True)
        assert resolved.stdout.strip() == "@custom:beta:google/gemma-4-27b"

    def test_find_model_returns_no_match_for_missing_qualified_same_suffix_sibling(self):
        import re
        import subprocess

        src = self._read_js()
        helper = re.search(r"function _getOptionProviderId\(opt\)\{.*?\n\}", src, re.S)
        finder = re.search(r"function _findModelInDropdown\(modelId, sel, preferredProviderId\)\{.*?\n\}", src, re.S)
        assert helper, "_getOptionProviderId() not found in ui.js"
        assert finder, "_findModelInDropdown() not found in ui.js"

        script = f"""
{helper.group(0)}
{finder.group(0)}
const sel = {{
  options: [
    {{ value: 'vendor-b/catalog/deepseek-v4-pro', parentElement: {{ tagName: 'OPTGROUP', dataset: {{ provider: 'custom:beta' }} }} }},
  ]
}};
console.log(_findModelInDropdown('vendor-a/deepseek-v4-pro', sel, 'custom:alpha') || '');
"""
        resolved = subprocess.run(["node", "-e", script], capture_output=True, text=True, check=True)
        assert resolved.stdout.strip() == ""


class TestResolveModelProviderColonInProviderId(unittest.TestCase):
    """resolve_model_provider() must handle provider_ids containing ':'.

    Custom named providers use IDs like 'custom:my-key'. When dedup
    prefixes produce '@custom:my-key:model', rsplit(':', 1) must split
    correctly into provider='custom:my-key' and model='model'.
    """

    def test_custom_provider_id_with_colon(self):
        """@custom:edith:gpt-5.4 → ('gpt-5.4', 'custom:edith', None)."""
        from api.config import resolve_model_provider
        model, provider, base_url = resolve_model_provider("@custom:edith:gpt-5.4")
        assert model == "gpt-5.4", f"Expected bare model 'gpt-5.4', got '{model}'"
        assert provider == "custom:edith", f"Expected provider 'custom:edith', got '{provider}'"
        assert base_url is None

    def test_simple_provider_id_unchanged(self):
        """@openai-codex:gpt-5.4 → ('gpt-5.4', 'openai-codex', None).

        Backward compat: simple provider_ids (no colon) still work.
        """
        from api.config import resolve_model_provider
        model, provider, base_url = resolve_model_provider("@openai-codex:gpt-5.4")
        assert model == "gpt-5.4"
        assert provider == "openai-codex"