using FluentAssertions;
using Workflow.Application.Form.Schema;
using Xunit;

namespace Workflow.Tests.Form;

public class SchemaValidatorTests
{
    private static readonly HashSet<string> AllowedComponents =
        ["Input", "InputNumber", "Select", "Radio.Group", "Checkbox.Group", "FormGrid", "Card"];

    [Fact]
    public void Validate_NormalizesInputNumberAliasAndExtractsFieldSummary()
    {
        const string schema = """
        {
          "type": "object",
          "properties": {
            "amount": {
              "type": "number",
              "title": "金额",
              "required": true,
              "x-component": "Input.Number",
              "x-validator": [
                { "type": "min", "value": 0, "message": "不能小于 0" },
                { "type": "max", "value": 9999, "message": "不能大于 9999" }
              ]
            }
          }
        }
        """;

        var result = SchemaValidator.Validate(schema, AllowedComponents);

        result.IsValid.Should().BeTrue(string.Join("; ", result.Errors));
        result.Fields.Should().ContainSingle();
        var field = result.Fields.Single();
        field.Path.Should().Be("amount");
        field.JsonType.Should().Be("number");
        field.Component.Should().Be("InputNumber");
        field.Required.Should().BeTrue();
        field.Validators.Select(v => v.Type).Should().Contain(["min", "max"]);
    }

    [Fact]
    public void Validate_AcceptsInputNumberWhenAllowedComponentsUseLegacyAlias()
    {
        const string schema = """
        {
          "type": "object",
          "properties": {
            "amount": {
              "type": "number",
              "title": "金额",
              "x-component": "InputNumber"
            }
          }
        }
        """;
        var allowedComponents = new HashSet<string> { "Input.Number" };

        var result = SchemaValidator.Validate(schema, allowedComponents);

        result.IsValid.Should().BeTrue(string.Join("; ", result.Errors));
        result.Fields.Single().Component.Should().Be("InputNumber");
    }

    [Fact]
    public void Validate_RejectsInvalidFieldKey()
    {
        const string schema = """
        {
          "type": "object",
          "properties": {
            "123 bad": {
              "type": "string",
              "title": "坏字段",
              "x-component": "Input"
            }
          }
        }
        """;

        var result = SchemaValidator.Validate(schema, AllowedComponents);

        result.IsValid.Should().BeFalse();
        result.Errors.Should().Contain(e => e.Contains("字段名") && e.Contains("123 bad"));
    }

    [Fact]
    public void Validate_ExtractsStaticDataSourceOptions()
    {
        const string schema = """
        {
          "type": "object",
          "properties": {
            "gender": {
              "type": "string",
              "title": "性别",
              "required": true,
              "x-component": "Select",
              "x-data-source": {
                "type": "static",
                "options": [
                  { "label": "男", "value": "male" },
                  { "label": "女", "value": "female", "disabled": true }
                ]
              }
            }
          }
        }
        """;

        var result = SchemaValidator.Validate(schema, AllowedComponents);

        result.IsValid.Should().BeTrue(string.Join("; ", result.Errors));
        var field = result.Fields.Single();
        field.Options.Should().HaveCount(2);
        field.Options[0].Label.Should().Be("男");
        field.Options[0].Value.GetString().Should().Be("male");
        field.Options[1].Disabled.Should().BeTrue();
    }

    [Fact]
    public void Validate_ConvertsLegacyTopLevelRequiredIntoFieldSummary()
    {
        const string schema = """
        {
          "type": "object",
          "required": ["name"],
          "properties": {
            "name": {
              "type": "string",
              "title": "姓名",
              "x-component": "Input"
            }
          }
        }
        """;

        var result = SchemaValidator.Validate(schema, AllowedComponents);

        result.IsValid.Should().BeTrue(string.Join("; ", result.Errors));
        result.Fields.Single().Required.Should().BeTrue();
    }

    [Fact]
    public void Validate_AcceptsValidConditionReaction()
    {
        const string schema = """
        {
          "type": "object",
          "properties": {
            "leaveType": {
              "type": "string",
              "title": "请假类型",
              "x-component": "Select",
              "x-reactions": [
                {
                  "type": "condition",
                  "target": "reason",
                  "when": { "source": "leaveType", "operator": "eq", "value": "annual" },
                  "action": "visible"
                }
              ]
            },
            "reason": {
              "type": "string",
              "title": "原因",
              "x-component": "Input"
            }
          }
        }
        """;

        var result = SchemaValidator.Validate(schema, AllowedComponents);

        result.IsValid.Should().BeTrue(string.Join("; ", result.Errors));
    }

    [Fact]
    public void Validate_AcceptsValidDataReactionWithLiteralOperand()
    {
        const string schema = """
        {
          "type": "object",
          "properties": {
            "price": {
              "type": "number",
              "title": "单价",
              "x-component": "InputNumber",
              "x-reactions": [
                {
                  "type": "data",
                  "target": "total",
                  "expression": { "left": "price", "operator": "multiply", "right": "8" }
                }
              ]
            },
            "total": {
              "type": "number",
              "title": "总价",
              "x-component": "InputNumber"
            }
          }
        }
        """;

        var result = SchemaValidator.Validate(schema, AllowedComponents);

        result.IsValid.Should().BeTrue(string.Join("; ", result.Errors));
    }

    [Fact]
    public void Validate_RejectsReactionTargetFieldNotFound()
    {
        const string schema = """
        {
          "type": "object",
          "properties": {
            "leaveType": {
              "type": "string",
              "title": "请假类型",
              "x-component": "Select",
              "x-reactions": [
                {
                  "type": "condition",
                  "target": "nonExist",
                  "when": { "source": "leaveType", "operator": "eq", "value": "annual" },
                  "action": "visible"
                }
              ]
            }
          }
        }
        """;

        var result = SchemaValidator.Validate(schema, AllowedComponents);

        result.IsValid.Should().BeFalse();
        result.Errors.Should().Contain(e => e.Contains("target") && e.Contains("nonExist"));
    }

    [Fact]
    public void Validate_RejectsInvalidReactionOperator()
    {
        const string schema = """
        {
          "type": "object",
          "properties": {
            "leaveType": {
              "type": "string",
              "title": "请假类型",
              "x-component": "Select",
              "x-reactions": [
                {
                  "type": "condition",
                  "target": "reason",
                  "when": { "source": "leaveType", "operator": "equals", "value": "annual" },
                  "action": "visible"
                }
              ]
            },
            "reason": {
              "type": "string",
              "title": "原因",
              "x-component": "Input"
            }
          }
        }
        """;

        var result = SchemaValidator.Validate(schema, AllowedComponents);

        result.IsValid.Should().BeFalse();
        result.Errors.Should().Contain(e => e.Contains("when.operator") && e.Contains("equals"));
    }

    [Fact]
    public void Validate_AcceptsRelativeRemoteDataSource()
    {
        const string schema = """
        {
          "type": "object",
          "properties": {
            "user": {
              "type": "string",
              "title": "用户",
              "x-component": "Select",
              "x-data-source": {
                "type": "remote",
                "url": "/forms",
                "method": "GET",
                "labelField": "name",
                "valueField": "id"
              }
            }
          }
        }
        """;

        var result = SchemaValidator.Validate(schema, AllowedComponents);

        result.IsValid.Should().BeTrue(string.Join("; ", result.Errors));
    }

    [Fact]
    public void Validate_RejectsAbsoluteRemoteUrl()
    {
        foreach (var url in new[] { "http://evil.com/x", "https://evil.com/x", "//evil.com/x", "ftp://x/y" })
        {
            var schema = "{\"type\":\"object\",\"properties\":{\"user\":{\"type\":\"string\",\"title\":\"用户\",\"x-component\":\"Select\",\"x-data-source\":{\"type\":\"remote\",\"url\":\"" + url + "\",\"method\":\"GET\"}}}}";

            var result = SchemaValidator.Validate(schema, AllowedComponents);

            result.IsValid.Should().BeFalse($"url={url} should be rejected");
            result.Errors.Should().Contain(e => e.Contains("url") && e.Contains("相对路径"));
        }
    }

    [Fact]
    public void Validate_RejectsRemoteDataSourceWithoutUrl()
    {
        const string schema = """
        {
          "type": "object",
          "properties": {
            "user": {
              "type": "string",
              "title": "用户",
              "x-component": "Select",
              "x-data-source": {
                "type": "remote"
              }
            }
          }
        }
        """;

        var result = SchemaValidator.Validate(schema, AllowedComponents);

        result.IsValid.Should().BeFalse();
        result.Errors.Should().Contain(e => e.Contains("remote") && e.Contains("url"));
    }

    [Fact]
    public void Validate_FieldPermission_WithValidActions_Passes()
    {
        const string schema = """
        {
          "type": "object",
          "properties": {
            "salary": {
              "type": "number", "title": "薪资", "x-component": "InputNumber",
              "x-field-permission": {
                "直属主管审批": "visible",
                "HR审批": "readonly",
                "财务审批": "hidden",
                "__default__": "hidden"
              }
            }
          }
        }
        """;

        var result = SchemaValidator.Validate(schema, AllowedComponents);

        result.IsValid.Should().BeTrue(string.Join("; ", result.Errors));
    }

    [Fact]
    public void Validate_FieldPermission_WithInvalidAction_Fails()
    {
        const string schema = """
        {
          "type": "object",
          "properties": {
            "salary": {
              "type": "number", "x-component": "InputNumber",
              "x-field-permission": { "HR审批": "invisible" }
            }
          }
        }
        """;

        var result = SchemaValidator.Validate(schema, AllowedComponents);

        result.IsValid.Should().BeFalse();
        result.Errors.Should().Contain(e => e.Contains("字段权限") && e.Contains("invisible"));
    }

    [Fact]
    public void Validate_ExtractsFieldPermissionIntoFieldSummary()
    {
        const string schema = """
        {
          "type": "object",
          "properties": {
            "salary": {
              "type": "number", "x-component": "InputNumber",
              "x-field-permission": { "HR审批": "hidden" }
            }
          }
        }
        """;

        var result = SchemaValidator.Validate(schema, AllowedComponents);

        result.IsValid.Should().BeTrue();
        var salary = result.Fields.Should().ContainSingle(f => f.Path == "salary").Subject;
        salary.FieldPermission.Should().NotBeNull();
        salary.FieldPermission!["HR审批"].Should().Be("hidden");
    }
}