const std = @import("std");
const testing = std.testing;

test "queue command argument parsing" {
    // Test various queue command argument combinations
    const test_cases = [_]struct {
        args: []const []const u8,
        expected_job: ?[]const u8,
        expected_priority: ?u32,
        should_be_valid: bool,
    }{
        .{ .args = &[_][]const u8{"test_job"}, .expected_job = "test_job", .expected_priority = null, .should_be_valid = true },
        .{ .args = &[_][]const u8{ "test_job", "--priority", "5" }, .expected_job = "test_job", .expected_priority = 5, .should_be_valid = true },
        .{ .args = &[_][]const u8{}, .expected_job = null, .expected_priority = null, .should_be_valid = false },
        .{ .args = &[_][]const u8{ "", "--priority", "5" }, .expected_job = "", .expected_priority = 5, .should_be_valid = false },
    };

    for (test_cases) |case| {
        try testing.expect(case.args.len > 0 or !case.should_be_valid);

        if (case.should_be_valid and case.expected_job != null) {
            const job = case.expected_job.?;
            try testing.expect(std.mem.eql(u8, case.args[0], job));
        }
    }
}

test "queue command help does not require job name" {
    // This is a behavioral test: help should print usage and not error.
    // We can't easily capture stdout here without refactoring, so we assert it doesn't throw.
    const allocator = testing.allocator;
    _ = allocator; // Mark as used

    // For now, just test that help arguments are recognized
    const help_args = [_][]const u8{ "--help", "-h" };
    for (help_args) |arg| {
        try testing.expect(arg.len > 0);
    }
}

test "queue job name validation" {
    // Test job name validation rules
    const test_names = [_]struct {
        name: []const u8,
        should_be_valid: bool,
        reason: []const u8,
    }{
        .{ .name = "valid_job_name", .should_be_valid = true, .reason = "Valid alphanumeric with underscore" },
        .{ .name = "job123", .should_be_valid = true, .reason = "Valid alphanumeric" },
        .{ .name = "job-with-dash", .should_be_valid = true, .reason = "Valid with dash" },
        .{ .name = "a", .should_be_valid = true, .reason = "Valid single character" },
        .{ .name = "", .should_be_valid = false, .reason = "Empty string" },
        .{ .name = " ", .should_be_valid = false, .reason = "Whitespace only" },
        .{ .name = "job with spaces", .should_be_valid = false, .reason = "Contains spaces" },
        .{ .name = "job/with/slashes", .should_be_valid = false, .reason = "Contains slashes" },
        .{ .name = "job\\with\\backslashes", .should_be_valid = false, .reason = "Contains backslashes" },
        .{ .name = "job@with@symbols", .should_be_valid = false, .reason = "Contains special symbols" },
    };

    for (test_names) |case| {
        if (case.should_be_valid) {
            try testing.expect(case.name.len > 0);
            try testing.expect(std.mem.indexOf(u8, case.name, " ") == null);
            try testing.expect(std.mem.indexOf(u8, case.name, "/") == null);
            try testing.expect(std.mem.indexOf(u8, case.name, "\\") == null);
        } else {
            try testing.expect(case.name.len == 0 or
                std.mem.indexOf(u8, case.name, " ") != null or
                std.mem.indexOf(u8, case.name, "/") != null or
                std.mem.indexOf(u8, case.name, "\\") != null or
                std.mem.indexOf(u8, case.name, "@") != null);
        }
    }
}

test "queue priority validation" {
    // Test priority value validation
    const test_priorities = [_]struct {
        priority_str: []const u8,
        should_be_valid: bool,
        expected_value: ?u32,
    }{
        .{ .priority_str = "0", .should_be_valid = true, .expected_value = 0 },
        .{ .priority_str = "1", .should_be_valid = true, .expected_value = 1 },
        .{ .priority_str = "5", .should_be_valid = true, .expected_value = 5 },
        .{ .priority_str = "10", .should_be_valid = true, .expected_value = 10 },
        .{ .priority_str = "100", .should_be_valid = true, .expected_value = 100 },
        .{ .priority_str = "-1", .should_be_valid = false, .expected_value = null },
        .{ .priority_str = "-5", .should_be_valid = false, .expected_value = null },
        .{ .priority_str = "abc", .should_be_valid = false, .expected_value = null },
        .{ .priority_str = "5.5", .should_be_valid = false, .expected_value = null },
        .{ .priority_str = "", .should_be_valid = false, .expected_value = null },
        .{ .priority_str = " ", .should_be_valid = false, .expected_value = null },
    };

    for (test_priorities) |case| {
        if (case.should_be_valid) {
            const parsed = std.fmt.parseInt(u32, case.priority_str, 10) catch |err| switch (err) {
                error.InvalidCharacter => null,
                else => null,
            };

            try testing.expect(parsed != null);
            try testing.expect(parsed.? == case.expected_value.?);
        } else {
            const parsed = std.fmt.parseInt(u32, case.priority_str, 10) catch |err| switch (err) {
                error.InvalidCharacter => null,
                else => null,
            };

            try testing.expect(parsed == null);
        }
    }
}

test "queue job metadata generation" {
    // Test job metadata creation
    const job_name = "test_job";
    const priority: u32 = 5;
    const timestamp = std.time.timestamp();

    // Create job metadata structure
    const JobMetadata = struct {
        name: []const u8,
        priority: u32,
        timestamp: i64,
        status: []const u8,
    };

    const metadata = JobMetadata{
        .name = job_name,
        .priority = priority,
        .timestamp = timestamp,
        .status = "queued",
    };

    try testing.expect(std.mem.eql(u8, metadata.name, job_name));
    try testing.expect(metadata.priority == priority);
    try testing.expect(metadata.timestamp == timestamp);
    try testing.expect(std.mem.eql(u8, metadata.status, "queued"));
}

test "queue job serialization" {
    const allocator = testing.allocator;

    // Test job serialization to JSON or other format
    const job_name = "test_job";
    const priority: u32 = 3;

    // Create a simple job representation
    const job_str = try std.fmt.allocPrint(allocator, "job:{s},priority:{d}", .{ job_name, priority });
    defer allocator.free(job_str);

    try testing.expect(std.mem.indexOf(u8, job_str, "job:test_job") != null);
    try testing.expect(std.mem.indexOf(u8, job_str, "priority:3") != null);
}

test "queue error handling" {
    // Test various error scenarios
    const error_cases = [_]struct {
        scenario: []const u8,
        should_fail: bool,
    }{
        .{ .scenario = "empty job name", .should_fail = true },
        .{ .scenario = "invalid priority", .should_fail = true },
        .{ .scenario = "missing required fields", .should_fail = true },
        .{ .scenario = "valid job", .should_fail = false },
    };

    for (error_cases) |case| {
        if (case.should_fail) {
            // Test that error conditions are properly handled
            try testing.expect(true); // Placeholder for actual error handling tests
        }
    }
}

test "queue concurrent operations" {
    const allocator = testing.allocator;

    // Test queuing multiple jobs concurrently
    const num_jobs = 5; // Reduced for simplicity

    // Generate job names and store them
    var job_names: [5][]const u8 = undefined;

    for (0..num_jobs) |i| {
        job_names[i] = try std.fmt.allocPrint(allocator, "job_{d}", .{i});
    }
    defer {
        for (job_names) |job_name| {
            allocator.free(job_name);
        }
    }

    // Verify all job names are unique
    for (job_names, 0..) |job1, i| {
        for (job_names[i + 1 ..]) |job2| {
            try testing.expect(!std.mem.eql(u8, job1, job2));
        }
    }
}

test "queue job priority ordering" {

    // Test job priority sorting
    const JobQueueEntry = struct {
        name: []const u8,
        priority: u32,

        fn lessThan(_: void, a: @This(), b: @This()) bool {
            return a.priority < b.priority;
        }
    };

    var entries = [_]JobQueueEntry{
        .{ .name = "low_priority", .priority = 10 },
        .{ .name = "high_priority", .priority = 1 },
        .{ .name = "medium_priority", .priority = 5 },
    };

    // Sort by priority (lower number = higher priority)
    std.sort.insertion(JobQueueEntry, &entries, {}, JobQueueEntry.lessThan);

    try testing.expect(std.mem.eql(u8, entries[0].name, "high_priority"));
    try testing.expect(std.mem.eql(u8, entries[1].name, "medium_priority"));
    try testing.expect(std.mem.eql(u8, entries[2].name, "low_priority"));

    try testing.expect(entries[0].priority == 1);
    try testing.expect(entries[1].priority == 5);
    try testing.expect(entries[2].priority == 10);
}
