"""Tests for FlaskPaste API endpoints."""

import json

from app.config import VERSION


class TestIndex:
    """Tests for GET / endpoint."""

    def test_get_api_info(self, client):
        """GET / returns API information."""
        response = client.get("/")
        assert response.status_code == 200
        data = json.loads(response.data)
        assert data["version"] == VERSION
        assert "endpoints" in data
        assert "usage" in data

    def test_api_info_contains_endpoints(self, client):
        """API info lists all endpoints."""
        response = client.get("/")
        data = json.loads(response.data)
        endpoints = data["endpoints"]
        assert "GET /" in endpoints
        assert "POST /" in endpoints
        assert "GET /<id>" in endpoints
        assert "GET /<id>/raw" in endpoints
        assert "DELETE /<id>" in endpoints


class TestHealth:
    """Tests for GET /health endpoint."""

    def test_health_endpoint_returns_ok(self, client):
        """Health endpoint returns healthy status."""
        response = client.get("/health")
        assert response.status_code == 200
        data = json.loads(response.data)
        assert data["status"] == "healthy"
        assert data["database"] == "ok"

    def test_health_endpoint_json_response(self, client):
        """Health endpoint returns JSON content type."""
        response = client.get("/health")
        assert "application/json" in response.content_type


class TestCreatePaste:
    """Tests for POST / endpoint."""

    def test_create_paste_raw(self, client, sample_text):
        """Create paste with raw text body."""
        response = client.post(
            "/",
            data=sample_text,
            content_type="text/plain",
        )
        assert response.status_code == 201
        data = json.loads(response.data)
        assert "id" in data
        assert len(data["id"]) == 12
        assert data["mime_type"] == "text/plain"
        assert "url" in data
        assert "raw" in data

    def test_create_paste_json(self, client, sample_json):
        """Create paste with JSON body."""
        response = client.post(
            "/",
            data=json.dumps(sample_json),
            content_type="application/json",
        )
        assert response.status_code == 201
        data = json.loads(response.data)
        assert "id" in data
        assert data["mime_type"] == "text/plain"

    def test_create_paste_binary(self, client, png_bytes):
        """Create paste with binary content returns octet-stream (magic detection disabled)."""
        response = client.post(
            "/",
            data=png_bytes,
            content_type="application/octet-stream",
        )
        assert response.status_code == 201
        data = json.loads(response.data)
        # Magic byte detection disabled - binary content is octet-stream
        assert data["mime_type"] == "application/octet-stream"

    def test_create_paste_empty_fails(self, client):
        """Create paste with empty content fails."""
        response = client.post("/", data="")
        assert response.status_code == 400
        data = json.loads(response.data)
        assert "error" in data

    def test_create_paste_with_auth(self, client, sample_text, auth_header):
        """Create paste with authentication includes owner."""
        response = client.post(
            "/",
            data=sample_text,
            content_type="text/plain",
            headers=auth_header,
        )
        assert response.status_code == 201
        data = json.loads(response.data)
        assert "owner" in data
        assert data["owner"] == "a" * 40

    def test_create_paste_invalid_auth_ignored(self, client, sample_text):
        """Invalid auth header is ignored (treated as anonymous)."""
        response = client.post(
            "/",
            data=sample_text,
            content_type="text/plain",
            headers={"X-SSL-Client-SHA1": "invalid"},
        )
        assert response.status_code == 201
        data = json.loads(response.data)
        assert "owner" not in data


class TestGetPaste:
    """Tests for GET /<id> endpoint."""

    def test_get_paste_metadata(self, client, sample_text):
        """Get paste returns metadata."""
        create = client.post("/", data=sample_text, content_type="text/plain")
        paste_id = json.loads(create.data)["id"]

        response = client.get(f"/{paste_id}")
        assert response.status_code == 200
        data = json.loads(response.data)
        assert data["id"] == paste_id
        assert data["mime_type"] == "text/plain"
        assert data["size"] == len(sample_text)
        assert "created_at" in data
        assert "raw" in data

    def test_get_paste_not_found(self, client):
        """Get nonexistent paste returns 404."""
        response = client.get("/abcd12345678")
        assert response.status_code == 404
        data = json.loads(response.data)
        assert "error" in data

    def test_get_paste_invalid_id(self, client):
        """Get paste with invalid ID returns 400."""
        response = client.get("/invalid!")
        assert response.status_code == 400

    def test_get_paste_wrong_length_id(self, client):
        """Get paste with wrong length ID returns 400."""
        response = client.get("/abc")
        assert response.status_code == 400

    def test_head_paste_metadata(self, client, sample_text):
        """HEAD returns headers without body."""
        create = client.post("/", data=sample_text, content_type="text/plain")
        paste_id = json.loads(create.data)["id"]

        response = client.head(f"/{paste_id}")
        assert response.status_code == 200
        assert response.content_type == "application/json"
        assert response.data == b""  # No body for HEAD

    def test_head_paste_not_found(self, client):
        """HEAD on nonexistent paste returns 404."""
        response = client.head("/abcd12345678")
        assert response.status_code == 404


class TestGetPasteRaw:
    """Tests for GET /<id>/raw endpoint."""

    def test_get_paste_raw_text(self, client, sample_text):
        """Get raw paste returns content with correct MIME type."""
        create = client.post("/", data=sample_text, content_type="text/plain")
        paste_id = json.loads(create.data)["id"]

        response = client.get(f"/{paste_id}/raw")
        assert response.status_code == 200
        assert response.data.decode("utf-8") == sample_text
        assert response.content_type == "text/plain; charset=utf-8"

    def test_get_paste_raw_binary(self, client, png_bytes):
        """Get raw binary paste returns correct content."""
        create = client.post(
            "/",
            data=png_bytes,
            content_type="application/octet-stream",
        )
        paste_id = json.loads(create.data)["id"]

        response = client.get(f"/{paste_id}/raw")
        assert response.status_code == 200
        assert response.data == png_bytes
        # Magic byte detection disabled - binary served as octet-stream
        assert response.content_type == "application/octet-stream"

    def test_get_paste_raw_not_found(self, client):
        """Get raw nonexistent paste returns 404."""
        response = client.get("/abcd12345678/raw")
        assert response.status_code == 404

    def test_get_paste_raw_inline_disposition(self, client, sample_text):
        """Text and image pastes have inline disposition."""
        create = client.post("/", data=sample_text, content_type="text/plain")
        paste_id = json.loads(create.data)["id"]

        response = client.get(f"/{paste_id}/raw")
        assert response.headers.get("Content-Disposition") == "inline"

    def test_head_paste_raw(self, client, sample_text):
        """HEAD on raw returns content-type without body."""
        create = client.post("/", data=sample_text, content_type="text/plain")
        paste_id = json.loads(create.data)["id"]

        response = client.head(f"/{paste_id}/raw")
        assert response.status_code == 200
        assert response.content_type == "text/plain; charset=utf-8"
        assert response.data == b""  # No body for HEAD


class TestDeletePaste:
    """Tests for DELETE /<id> endpoint."""

    def test_delete_paste_success(self, client, sample_text, auth_header):
        """Delete owned paste succeeds."""
        create = client.post(
            "/",
            data=sample_text,
            content_type="text/plain",
            headers=auth_header,
        )
        paste_id = json.loads(create.data)["id"]

        response = client.delete(f"/{paste_id}", headers=auth_header)
        assert response.status_code == 200
        data = json.loads(response.data)
        assert "message" in data

        # Verify deletion
        get_response = client.get(f"/{paste_id}")
        assert get_response.status_code == 404

    def test_delete_paste_no_auth(self, client, sample_text):
        """Delete without authentication fails."""
        create = client.post("/", data=sample_text, content_type="text/plain")
        paste_id = json.loads(create.data)["id"]

        response = client.delete(f"/{paste_id}")
        assert response.status_code == 401
        data = json.loads(response.data)
        assert "error" in data

    def test_delete_paste_wrong_owner(self, client, sample_text, auth_header, other_auth_header):
        """Delete paste owned by another user fails."""
        create = client.post(
            "/",
            data=sample_text,
            content_type="text/plain",
            headers=auth_header,
        )
        paste_id = json.loads(create.data)["id"]

        response = client.delete(f"/{paste_id}", headers=other_auth_header)
        assert response.status_code == 403
        data = json.loads(response.data)
        assert "error" in data

    def test_delete_anonymous_paste_fails(self, client, sample_text, auth_header):
        """Cannot delete anonymous paste (no owner)."""
        create = client.post("/", data=sample_text, content_type="text/plain")
        paste_id = json.loads(create.data)["id"]

        response = client.delete(f"/{paste_id}", headers=auth_header)
        assert response.status_code == 403

    def test_delete_paste_not_found(self, client, auth_header):
        """Delete nonexistent paste returns 404."""
        response = client.delete("/abcd12345678", headers=auth_header)
        assert response.status_code == 404

    def test_delete_paste_invalid_id(self, client, auth_header):
        """Delete with invalid ID returns 400."""
        response = client.delete("/invalid!", headers=auth_header)
        assert response.status_code == 400