import json

from ilsp.bicep_lsp.local_features import (
    compute_folding_ranges,
    compute_signature_help,
    compute_workspace_symbols,
)


# ── signatureHelp ────────────────────────────────────────────────────────────

def test_signature_help_simple_call():
    lines = ["var id = resourceId('Microsoft.Storage/storageAccounts', "]
    result = compute_signature_help(lines, 0, len(lines[0]))
    assert result is not None
    sig = result["signatures"][0]
    assert sig["label"].startswith("resourceId(")
    assert result["activeParameter"] == 1


def test_signature_help_first_arg():
    lines = ["var g = guid("]
    result = compute_signature_help(lines, 0, len(lines[0]))
    assert result is not None
    assert result["activeParameter"] == 0
    assert result["signatures"][0]["label"].startswith("guid(")


def test_signature_help_unknown_function_returns_none():
    lines = ["var x = notARealFunction("]
    result = compute_signature_help(lines, 0, len(lines[0]))
    assert result is None


def test_signature_help_outside_call_returns_none():
    lines = ["var x = 'hello world'"]
    result = compute_signature_help(lines, 0, len(lines[0]))
    assert result is None


def test_signature_help_nested_call_uses_innermost():
    lines = ["var x = concat(toLower("]
    result = compute_signature_help(lines, 0, len(lines[0]))
    assert result is not None
    assert result["signatures"][0]["label"].startswith("toLower(")


# ── foldingRange ─────────────────────────────────────────────────────────────

def test_folding_range_multiline_object():
    lines = [
        "resource sa 'Microsoft.Storage/storageAccounts@2023-01-01' = {",
        "  name: 'demo'",
        "  sku: {",
        "    name: 'Standard_LRS'",
        "  }",
        "}",
    ]
    ranges = compute_folding_ranges(lines)
    assert {"startLine": 0, "endLine": 5, "kind": "region"} in ranges
    assert {"startLine": 2, "endLine": 4, "kind": "region"} in ranges


def test_folding_range_ignores_single_line_brackets():
    lines = ["var x = { a: 1 }"]
    ranges = compute_folding_ranges(lines)
    assert ranges == []


def test_folding_range_comment_block():
    lines = [
        "// line one",
        "// line two",
        "// line three",
        "var x = 1",
    ]
    ranges = compute_folding_ranges(lines)
    assert {"startLine": 0, "endLine": 2, "kind": "comment"} in ranges


def test_folding_range_short_comment_block_not_folded():
    lines = ["// only one line", "var x = 1"]
    ranges = compute_folding_ranges(lines)
    assert not any(r["kind"] == "comment" for r in ranges)


# ── workspace/symbol ─────────────────────────────────────────────────────────

def test_workspace_symbol_finds_declarations():
    docs = {
        "file:///a.bicep": [
            "param location string = 'westeurope'",
            "var storageName = 'demo'",
            "resource sa 'Microsoft.Storage/storageAccounts@2023-01-01' = {",
            "  name: storageName",
            "}",
            "module roleAssignment 'br/modules:modules/roleassignments:2.0.x' = {",
            "  name: 'ra'",
            "}",
        ],
    }
    results = compute_workspace_symbols(docs, "")
    names = {r["name"] for r in results}
    assert names == {"location", "storageName", "sa", "roleAssignment"}


def test_workspace_symbol_filters_by_query():
    docs = {
        "file:///a.bicep": [
            "var storageName = 'demo'",
            "var otherThing = 'x'",
        ],
    }
    results = compute_workspace_symbols(docs, "storage")
    assert len(results) == 1
    assert results[0]["name"] == "storageName"


def test_workspace_symbol_query_is_case_insensitive():
    docs = {"file:///a.bicep": ["var StorageName = 'demo'"]}
    results = compute_workspace_symbols(docs, "storagename")
    assert len(results) == 1


def test_workspace_symbol_searches_across_multiple_documents():
    docs = {
        "file:///a.bicep": ["var fromA = 1"],
        "file:///b.bicep": ["var fromB = 2"],
    }
    results = compute_workspace_symbols(docs, "")
    names = {r["name"] for r in results}
    assert names == {"fromA", "fromB"}