//! I5's desktop proof: the transcript screen built from synthetic
//! `ai_app::client::transcript_fold` rows (no network, no server -- see
//! `lib.rs`'s doc for why `transcript-ui` itself never fetches anything),
//! run via `iris/run-headless.sh transcript -- -p transcript-ui` for a
//! screenshot on the winit backend, or `cargo run --example transcript -p
//! transcript-ui` with a real compositor.
//!
//! The rows exercise every one of the seven "hard to get back" behaviours
//! this box's markdown/selection work is meant to show: a heading, bold,
//! italic, an inline code span, a link, a fenced code block (rich inline
//! text), a multi-message conversation (bottom-anchored virtualised list),
//! and a three-call tool run (collapsed by default -- tap it, or drive it
//! with `ui-trace record --do "tap 'Tools'"` on Android, to prove
//! hold-the-edge expand).

use ai_app::client::QuestionOption;
use ai_app::client::transcript_fold::{QuestionCard, TranscriptItem, TranscriptRow as FoldedRow};
use iris::prelude::*;

fn main() {
    DefaultApp::<Client>::run();
}

#[derive(DefaultUiState)]
pub struct Client {
    ui_state: DefaultUiState,
    #[allow(dead_code)]
    screen: ai_app::ui::TranscriptScreen,
}

fn msg(seq: u64, from_user: bool, text: &str) -> FoldedRow {
    FoldedRow::Single(if from_user {
        TranscriptItem::UserMsg {
            seq,
            text: text.to_string(),
            attachments: Vec::new(),
        }
    } else {
        TranscriptItem::AssistantMsg {
            seq,
            text: text.to_string(),
            settled: true,
        }
    })
}

/// One tool call. `result` is `None` for a call with no result yet and
/// `Some((output, failed))` for one that answered.
fn tool_call(id: &str, tool: &str, input: &str, result: Option<(&str, bool)>) -> TranscriptItem {
    tool_call_in("run1", id, tool, input, result)
}

/// The same, in a named run. Two runs in one transcript must not share a
/// `run_id`: it is the row's identity in the list (`row::row_key`), and
/// two rows under one key is the duplicate-key fault AGENTS.md's
/// "Importing" section describes. Here it made two rows swap cached
/// heights and draw at each other's boxes.
fn tool_call_in(
    run: &str,
    id: &str,
    tool: &str,
    input: &str,
    result: Option<(&str, bool)>,
) -> TranscriptItem {
    TranscriptItem::ToolRun {
        seq: 3,
        id: id.into(),
        run_id: run.into(),
        tool: tool.into(),
        input: input.into(),
        output: result.map(|(out, _)| out.to_string()).unwrap_or_default(),
        done: result.is_some(),
        failed: result.is_some_and(|(_, failed)| failed),
        asks: Vec::new(),
        images: Vec::new(),
    }
}

/// A call stopped on the reader: one unanswered permission question.
fn asking(id: &str, tool: &str, input: &str) -> TranscriptItem {
    let mut call = tool_call_in("run2", id, tool, input, None);
    if let TranscriptItem::ToolRun { asks, .. } = &mut call {
        asks.push(QuestionCard {
            seq: 9,
            id: format!("{id}-q"),
            prompt: "Allow this command?".into(),
            header: None,
            options: vec![
                QuestionOption {
                    label: "Allow".into(),
                    description: None,
                    preview: None,
                },
                QuestionOption {
                    label: "Deny".into(),
                    description: None,
                    preview: None,
                },
            ],
            multi_select: false,
            answers: Vec::new(),
        });
    }
    call
}

/// Longer than the card's own cap, so the "Show all N lines" control is on
/// screen in the expanded shot.
fn long_output() -> String {
    (0..200)
        .map(|i| format!("test ai_app::ui::case_{i} ... ok"))
        .collect::<Vec<_>>()
        .join("\n")
}

fn synthetic_rows() -> Vec<FoldedRow> {
    vec![
        msg(
            1,
            true,
            "Can you show me a **bold** word, some *italic* text, and `inline code`?",
        ),
        msg(
            2,
            false,
            "# Sure\n\nHere's a [link to the repo](https://example.com/ai-app-2) and a fenced block:\n\n```rust\nfn main() {\n    println!(\"hi\");\n}\n```",
        ),
        // Every state a tool card has to draw, in one run (P1b): a call
        // that worked, one the tool reported as failed, one whose result
        // never arrived, and one still running. The last two look the same
        // in the events -- an empty output and `done: false` -- and are
        // told apart only by whether the session is still working, which
        // is what `TranscriptScreen::set_session_working` says.
        FoldedRow::Tools(vec![
            tool_call(
                "t1",
                "Read",
                r#"{"file_path": "src/main.rs"}"#,
                Some(("fn main() {}\n", false)),
            ),
            tool_call(
                "t2",
                "Bash",
                r#"{"command": "cargo build --release", "timeout": 480000, "description": "Build it"}"#,
                Some((
                    "error: could not compile `iris`\nCaused by: linker not found",
                    true,
                )),
            ),
            tool_call("t3", "Grep", r#"{"pattern": "fn fold_event"}"#, None),
        ]),
        // A lone call is a card too rather than a group of one -- and this
        // one carries the kilobyte output a collapsed card must not lay
        // out.
        FoldedRow::Single(tool_call(
            "t5",
            "Bash",
            r#"{"command": "cargo test -p transcript-ui -- --nocapture"}"#,
            Some((&long_output(), false)),
        )),
        msg(6, true, "Looks good, thanks!"),
        // Every block kind `ai_app::client::markdown_blocks` names, in one
        // row, so P1a's appearance can be looked at against the Compose
        // app's without a server (docs/RUST.md's P1a box). The heading,
        // paragraph, fence and table are the *same source* the bench
        // fixture carries (`app/bench-fixture/generate.py`), so the two
        // screenshots differ only in the renderer; the list and the quote
        // are extra, because the fixture has neither.
        msg(7, false, BLOCK_SAMPLER),
    ]
}

/// One of each markdown block, for the P1a screenshot pair. See
/// [`synthetic_rows`].
const BLOCK_SAMPLER: &str = "\
## What changed

Iris **fold** render measure session window anchor context transcript \
iris measure iris scroll call transcript layout *cursor* context, and a \
[bench](https://example.com/bench) link.

```rust
fn fold_event(items: Vec<Item>, seq: u64) -> Vec<Item> {
    // a comment worth keeping: this is the fold the app's own screen runs
    let mut out = items;
    out.push(Item::new(seq));
    out
}
```

| column | value |
|---|---|
| a | measure place draw tool call token context window anchor |

- one bullet
- another, with `inline code`
    - nested one level
1. first numbered
2. second numbered

> A quoted line, to show the bar and the indent.
";

impl DefaultAppState for Client {
    fn new(
        mut ui_state: DefaultUiState,
        rsc: &mut DefaultRsc<Self>,
        _: Proxy<Self::Event>,
    ) -> Self {
        let screen = ai_app::ui::build(rsc, &mut ui_state, synthetic_rows());
        // Exercises `push_row`/`ItemKey` beyond construction time, matching
        // how a live SSE loop appends -- a row arriving after the screen
        // already exists must land at the bottom without disturbing what's
        // above it (I3's `push_back`/`snap_end`).
        screen.push_row(
            rsc,
            &FoldedRow::Single(TranscriptItem::CommandRow {
                seq: 8,
                text: "clear".into(),
            }),
        );
        // A second run at the live end, so the *running* state is on
        // screen too. It cannot share a row with "no result": the two are
        // the same events and are told apart only by whether the session
        // is working, which is a property of the row rather than of the
        // call (`TranscriptScreen::set_session_working`).
        screen.push_row(
            rsc,
            &FoldedRow::Tools(vec![
                tool_call_in(
                    "run2",
                    "t6",
                    "Read",
                    r#"{"file_path": "docs/RUST.md"}"#,
                    Some(("# Moving the app to Rust\n", false)),
                ),
                tool_call_in(
                    "run2",
                    "t7",
                    "Bash",
                    r#"{"command": "cargo clippy --workspace --all-targets"}"#,
                    Some(("error: unused variable `x`", true)),
                ),
                tool_call_in("run2", "t8", "Glob", r#"{"pattern": "**/*.rs"}"#, None),
                // Waiting on a permission, so this card is drawn *open*
                // whatever the reader last chose -- the command is the
                // thing being decided, and a row saying only "Bash"
                // cannot be decided on. It is also how the expanded card
                // (input block, output block, timeout) gets into the
                // screenshot without a finger.
                asking(
                    "t9",
                    "Bash",
                    r#"{"command": "rm -rf target", "timeout": 120000, "description": "Clear the build"}"#,
                ),
            ]),
        );
        screen.set_session_working(rsc, true);
        // The expanded picture has no other way to be looked at on a
        // machine with no display and no finger -- see `run-headless.sh`
        // and docs/RUST.md's P1b box.
        if std::env::var_os("IRIS_TOOLS_EXPANDED").is_some() {
            assert!(
                screen.expand_tail_tools(rsc, true),
                "the newest row must be the tool run this flag is about"
            );
        }
        Self { ui_state, screen }
    }
}