//! Made-up mail for the prototypes: Gmail's system labels, user labels
//! (one nested, as Gmail shows "Work/Hiring"), and threads spread across
//! them, some unread, some starred, some in several labels at once.

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

/// A Gmail label: the system ones, then the user's. Starred is a label in
/// Gmail too; unread is not one here, since every view shows it anyway.
pub const Label = enum {
    inbox,
    starred,
    sent,
    drafts,
    spam,
    trash,
    work,
    hiring,
    family,
    receipts,
    travel,
    newsletters,
    waiting,
    someday,

    pub const Set = std.EnumSet(Label);

    pub const Kind = enum { system, user };

    pub const Info = struct {
        /// What Gmail calls it; a slash nests it under the label before it.
        name: []const u8,
        kind: Kind,
        /// The key that picks it where a prototype offers one.
        key: u8,
        color: Rgb,
    };

    pub fn info(self: Label) Info {
        return infos.get(self);
    }

    /// The label's key as a string, for a keycap.
    pub fn keyCap(self: Label) []const u8 {
        return (&infos.getPtrConst(self).key)[0..1];
    }

    /// The label whose key is `c`.
    pub fn fromKey(c: u8) ?Label {
        for (std.enums.values(Label)) |label| {
            if (label.info().key == c) return label;
        }
        return null;
    }
};

pub const Rgb = struct { r: u8, g: u8, b: u8 };

const gray: Rgb = .{ .r = 0x6b, .g = 0x72, .b = 0x80 };

const infos: std.EnumArray(Label, Label.Info) = .init(.{
    .inbox = .{ .name = "Inbox", .kind = .system, .key = 'i', .color = .{ .r = 0x3b, .g = 0x6e, .b = 0xd8 } },
    .starred = .{ .name = "Starred", .kind = .system, .key = 's', .color = .{ .r = 0xd9, .g = 0xa4, .b = 0x06 } },
    .sent = .{ .name = "Sent", .kind = .system, .key = 't', .color = gray },
    .drafts = .{ .name = "Drafts", .kind = .system, .key = 'd', .color = gray },
    .spam = .{ .name = "Spam", .kind = .system, .key = '!', .color = .{ .r = 0xb9, .g = 0x1c, .b = 0x1c } },
    .trash = .{ .name = "Trash", .kind = .system, .key = '#', .color = gray },
    .work = .{ .name = "Work", .kind = .user, .key = 'w', .color = .{ .r = 0x25, .g = 0x63, .b = 0xeb } },
    .hiring = .{ .name = "Work/Hiring", .kind = .user, .key = 'h', .color = .{ .r = 0x7c, .g = 0x3a, .b = 0xed } },
    .family = .{ .name = "Family", .kind = .user, .key = 'f', .color = .{ .r = 0x16, .g = 0xa3, .b = 0x4a } },
    .receipts = .{ .name = "Receipts", .kind = .user, .key = 'r', .color = .{ .r = 0xea, .g = 0x58, .b = 0x0c } },
    .travel = .{ .name = "Travel", .kind = .user, .key = 'v', .color = .{ .r = 0x08, .g = 0x91, .b = 0xb2 } },
    .newsletters = .{ .name = "Newsletters", .kind = .user, .key = 'n', .color = .{ .r = 0xdb, .g = 0x27, .b = 0x77 } },
    .waiting = .{ .name = "Waiting", .kind = .user, .key = 'a', .color = .{ .r = 0xca, .g = 0x8a, .b = 0x04 } },
    .someday = .{ .name = "Someday", .kind = .user, .key = 'y', .color = .{ .r = 0x64, .g = 0x74, .b = 0x8b } },
});

pub const Thread = struct {
    from: []const u8,
    subject: []const u8,
    snippet: []const u8,
    /// How long ago the newest message arrived.
    minutes_ago: u32,
    /// How many messages the conversation holds.
    messages: u8,
    labels: Label.Set,
    unread: bool,
};

const hour = 60;
const day = 24 * hour;

fn t(
    from: []const u8,
    subject: []const u8,
    snippet: []const u8,
    minutes_ago: u32,
    messages: u8,
    ids: []const Label,
    unread: bool,
) Thread {
    return .{
        .from = from,
        .subject = subject,
        .snippet = snippet,
        .minutes_ago = minutes_ago,
        .messages = messages,
        .labels = .initMany(ids),
        .unread = unread,
    };
}

/// Newest first.
pub const threads = [_]Thread{
    t(
        "Maya Okafor",
        "Offsite agenda, final",
        "Moved the roadmap session to Thursday morning so Ravi can join from Lisbon.",
        7,
        4,
        &.{ .inbox, .work, .starred },
        true,
    ),
    t(
        "GitHub",
        "[siv] CI failed on main",
        "The test-render-vulkan job failed after 14m 02s: validation error in vkQueueSubmit2.",
        22,
        1,
        &.{ .inbox, .work },
        true,
    ),
    t(
        "Mom",
        "Sunday dinner?",
        "Your dad is making the lamb again. Bring the kids, and the good bread if you pass the bakery.",
        41,
        3,
        &.{ .inbox, .family },
        true,
    ),
    t(
        "Priya Raman",
        "Candidate packet: Jonas Weber",
        "Attached his take-home and the panel notes. Strong on systems, quiet in the design round.",
        1 * hour + 10,
        2,
        &.{ .inbox, .work, .hiring },
        true,
    ),
    t(
        "Delta",
        "Your trip to Lisbon is confirmed",
        "Confirmation HX7K2P. Departs Tue 6:05 PM from MSP, arrives Wed 10:40 AM.",
        2 * hour,
        1,
        &.{ .inbox, .travel, .receipts },
        false,
    ),
    t(
        "Ravi Menon",
        "Re: render thread priorities",
        "I tried SCHED_FIFO for the compositor thread and frame pacing got worse, not better.",
        3 * hour,
        6,
        &.{ .inbox, .work },
        false,
    ),
    t(
        "Zig Weekly",
        "Issue 212: the 0.17 build system",
        "This week: addPassthruArgs, cache poisoning, and why @cImport had to go.",
        5 * hour,
        1,
        &.{ .inbox, .newsletters },
        true,
    ),
    t(
        "Sam Torres",
        "Lunch tomorrow",
        "Taco place on Lake St at noon? I'll grab a table if I'm early.",
        6 * hour,
        2,
        &.{.inbox},
        false,
    ),
    t(
        "Stripe",
        "Receipt from Fastmail",
        "Amount paid $60.00. Standard plan, 12 months. Card ending 4242.",
        9 * hour,
        1,
        &.{.receipts},
        false,
    ),
    t(
        "Lena Fischer",
        "Re: offer letter",
        "Thank you! I've signed and sent it back. Looking forward to starting on the 1st.",
        1 * day,
        5,
        &.{ .inbox, .work, .hiring, .starred },
        false,
    ),
    t(
        "Dad",
        "Photos from the lake",
        "Finally got these off the camera. The one of Ada with the fish is my favorite.",
        1 * day + 2 * hour,
        1,
        &.{ .family, .starred },
        false,
    ),
    t(
        "Hotel Avenida",
        "Your reservation request",
        "We are pleased to confirm 3 nights, arriving 12 Nov. Breakfast is included.",
        1 * day + 5 * hour,
        2,
        &.{ .inbox, .travel },
        false,
    ),
    t(
        "Jonas Weber",
        "Question about the take-home",
        "Should the parser stream, or is it fine to read the whole file first?",
        1 * day + 8 * hour,
        3,
        &.{ .work, .hiring, .waiting },
        false,
    ),
    t(
        "Linear",
        "3 issues assigned to you",
        "PAR-12 Message list virtualization, PAR-14 Label picker, PAR-15 Undo archive.",
        2 * day,
        1,
        &.{ .inbox, .work },
        true,
    ),
    t(
        "Maya Okafor",
        "Budget numbers for Q1",
        "Can you sanity check the infra line? It looks high but I might be double counting.",
        2 * day + 3 * hour,
        4,
        &.{ .work, .waiting },
        false,
    ),
    t(
        "Amazon",
        "Your order has shipped",
        "Keychron Q1 Pro will arrive Friday. Track your package.",
        2 * day + 6 * hour,
        1,
        &.{.receipts},
        false,
    ),
    t(
        "Ada's school",
        "Field trip permission slip",
        "Please sign and return by Friday. The trip to the science museum is on the 14th.",
        3 * day,
        1,
        &.{ .inbox, .family, .waiting },
        true,
    ),
    t(
        "This Week in Rust",
        "Issue 571",
        "Rust 1.92 ships async closures in traits, plus a look at the new trait solver.",
        3 * day + 4 * hour,
        1,
        &.{.newsletters},
        false,
    ),
    t(
        "Ravi Menon",
        "Lisbon dinner spots",
        "Cervejaria Ramiro is a must. Book ahead or come at 5 and wait with everyone else.",
        4 * day,
        2,
        &.{ .travel, .starred },
        false,
    ),
    t(
        "Ana Lima",
        "Re: siv accessibility review",
        "Orca reads the sidebar fine, but the table headers announce twice. Notes inline.",
        4 * day + 2 * hour,
        7,
        &.{ .work, .starred },
        false,
    ),
    t(
        "Fastmail",
        "Your storage is 80% full",
        "You're using 24 GB of 30 GB. Upgrade or clear out old messages.",
        5 * day,
        1,
        &.{.inbox},
        false,
    ),
    t(
        "Grandma",
        "Recipe you asked for",
        "Two cups flour, one of sugar, a pinch of salt, and the secret is the browned butter.",
        6 * day,
        2,
        &.{ .family, .someday },
        false,
    ),
    t(
        "Priya Raman",
        "Panel schedule next week",
        "Can you take the systems round on Tuesday at 2? Two candidates back to back.",
        6 * day + 5 * hour,
        3,
        &.{ .work, .hiring },
        false,
    ),
    t(
        "Kickstarter",
        "A project you backed has an update",
        "Production is two weeks behind, but the first units ship in March.",
        8 * day,
        1,
        &.{ .newsletters, .someday },
        false,
    ),
    t(
        "Sam Torres",
        "Climbing Saturday?",
        "The new gym in Northeast has a bouldering wall. Want to try it?",
        9 * day,
        4,
        &.{.someday},
        false,
    ),
    t(
        "City of Minneapolis",
        "Water bill available",
        "Your bill of $84.12 is due on the 28th. Pay online or by phone.",
        10 * day,
        1,
        &.{ .receipts, .waiting },
        false,
    ),
    t(
        "Mom",
        "Thanksgiving plans",
        "We're doing it at your aunt's this year. Can you bring pie? Two, maybe three.",
        11 * day,
        9,
        &.{.family},
        false,
    ),
    t(
        "Lobste.rs Digest",
        "Top stories this week",
        "A tour of io_uring, Zig's new std.Io, and why your terminal is slow.",
        12 * day,
        1,
        &.{.newsletters},
        false,
    ),
    t(
        "Maya Okafor",
        "Re: performance reviews",
        "Drafts are due on the 30th. I'll send the template this week.",
        14 * day,
        3,
        &.{.work},
        false,
    ),
    t(
        "Unknown sender",
        "You have won a gift card",
        "Claim your $500 reward now. Click the link below before it expires.",
        15 * day,
        1,
        &.{.spam},
        true,
    ),
    t(
        "Me",
        "Notes to self: parcel",
        "Keyboard first. Every action has a key and a click. Labels are first class.",
        2 * hour,
        1,
        &.{ .sent, .starred, .someday },
        false,
    ),
    t("Me", "Re: Lunch tomorrow", "Sounds good, see you at noon.", 5 * hour, 2, &.{.sent}, false),
    t(
        "Me",
        "Draft: reply to Ana",
        "Thanks for the review. On the double announcement, I think the header cell",
        30,
        1,
        &.{.drafts},
        false,
    ),
};

test "every label's key is distinct" {
    var seen: std.bit_set.Integer(256) = .empty;
    for (std.enums.values(Label)) |label| {
        try testing.expect(!seen.isSet(label.info().key));
        seen.set(label.info().key);
    }
}