#!/usr/bin/env bash
#
# Blocker CI — the source of truth for what must pass before a PR is mergeable.
#
# CLAUDE.md section 10.4 requires a Gitea workflow to run these same checks. It
# calls THIS script rather than reimplementing the steps, so the two cannot
# drift apart. That is the whole reason this file exists separately from any
# workflow definition.
#
# Usage:
#   scripts/ci.sh              run every check, stop at the first failure
#   scripts/ci.sh --keep-going run every check, summarise all failures at the end
#   scripts/ci.sh --help
#
# Note on skips: a skipped check never counts as a pass. Every skip names what
# was skipped and why, because a skip that reads as a green tick is how CI ends
# up quietly not testing anything.

set -euo pipefail

source "$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)/lib.sh"

KEEP_GOING=0

usage() {
    cat <<'USAGE'
Usage: scripts/ci.sh [--keep-going] [--help]

Checks, in order:
  1. cargo fmt --all --check
  2. cargo clippy --workspace --all-targets -- -D warnings
  3. cargo test --workspace --all-targets
  4. size gate: stripped release daemon <= 5 MB (section 5)
  5. Android lint + assembleRelease   (skipped loudly if no SDK)
  6. gitleaks secret scan            (skipped loudly if not installed)

  --keep-going   run every check and report all failures together
USAGE
}

while (( $# )); do
    case "$1" in
        --keep-going) KEEP_GOING=1 ;;
        -h | --help)
            usage
            exit 0
            ;;
        *)
            printf 'unknown argument: %s\n' "$1" >&2
            usage >&2
            exit 2
            ;;
    esac
    shift
done

TOTAL_STEPS=6

FAILED=()
SKIPPED=()
STEP_NUM=0

run_step() {
    STEP_NUM=$((STEP_NUM + 1))
    printf '\n%s[%d/%d]%s %s\n' \
        "${C_BLUE}" "${STEP_NUM}" "${TOTAL_STEPS}" "${C_RESET}" "$1"
    shift
    local output
    # Each check runs in a subshell so a failure is capturable and the
    # --keep-going summary can report it, rather than `set -e` aborting the
    # whole run with no record of what had already passed.
    if output="$("$@" 2>&1)"; then
        [[ -n "${output}" ]] && printf '%s\n' "${output}" | sed 's/^/  /'
        return 0
    fi
    [[ -n "${output}" ]] && printf '%s\n' "${output}" | sed 's/^/  /'
    return 1
}

record() {
    if (( KEEP_GOING )); then
        FAILED+=("$1")
        return 0
    fi
    printf '\n%scheck failed:%s %s\n' "${C_RED}" "${C_RESET}" "$1"
    exit 1
}

printf '%sBlocker CI%s\n' "${C_BLUE}" "${C_RESET}"
info "repo: ${REPO_ROOT}"
info "target: ${CARGO_TARGET_DIR}"

# Cargo resolves a workspace from the current directory, not from the script's
# location, so a human running this from ~/Desktop and a CI runner invoking it by
# absolute path both need the CWD moved. Everything below can then use plain
# `cargo` invocations.
cd -- "${REPO_ROOT}"

# --- 1. Formatting ---------------------------------------------------------
if run_step 'cargo fmt --all --check' cargo fmt --all -- --check; then
    pass 'formatting'
else
    record 'cargo fmt --all --check'
fi

# --- 2. Clippy -------------------------------------------------------------
if run_step 'cargo clippy -D warnings' \
    cargo clippy --workspace --all-targets -- -D warnings; then
    pass 'clippy'
else
    record 'cargo clippy -D warnings'
fi

# --- 3. Tests --------------------------------------------------------------
if run_step 'cargo test --workspace' cargo test --workspace --all-targets; then
    pass 'tests (including golden decision tables)'
else
    record 'cargo test --workspace'
fi

# --- 4. Size gate ----------------------------------------------------------
# Section 5: the stripped desktop daemon must not exceed 5 MB. In M0 the daemon
# is a placeholder that prints two lines, so this is far under budget; the gate
# becomes meaningful in M2-Linux once enforcement code exists. It runs from M0
# anyway so that the budget is enforced by tooling from the first commit rather
# than being introduced as a new failure later.
printf '\n%s[4/6]%s size gate (section 5: stripped daemon <= 5 MB)\n' \
    "${C_BLUE}" "${C_RESET}"
if run_step 'cargo build --release -p blocker-daemon' \
    cargo build --release -p blocker-daemon; then
    if "${REPO_ROOT}/scripts/size-check.sh"; then
        pass 'size gate'
    else
        record 'size gate'
    fi
else
    record 'cargo build --release -p blocker-daemon'
fi

# --- 5. Android ------------------------------------------------------------
# Skipped loudly, never silently. CLAUDE.md section 10.4 says to ask whether the
# runner has the SDK; until that is answered, detection plus an honest message is
# the truthful behaviour. A pass here would be a lie.
printf '\n%s[5/6]%s Android lint + assembleRelease\n' "${C_BLUE}" "${C_RESET}"
if SDK_ROOT="$(android_sdk_root)"; then
    info "SDK: ${SDK_ROOT}"
    if run_step 'android assembleRelease' \
        "${REPO_ROOT}/android/gradlew" -p "${REPO_ROOT}/android" lint assembleRelease; then
        pass 'android'
    else
        record 'android lint/assembleRelease'
    fi
else
    skip 'android lint + assembleRelease' \
        'no Android SDK found (ANDROID_HOME / ANDROID_SDK_ROOT unset, ~/Android/Sdk absent). Not verified by this run.'
    SKIPPED+=('android')
fi

# --- 6. Secret scan --------------------------------------------------------
# Section 10.1 requires a secret scanner in CI and in ci.sh. gitleaks is not
# installed on every machine and that is not a reason to skip it quietly.
printf '\n%s[6/6]%s secret scan (gitleaks)\n' "${C_BLUE}" "${C_RESET}"
if command -v gitleaks > /dev/null 2>&1; then
    # `gitleaks detect` never prints matched secret values, only file paths and
    # rule names — so this output is safe to paste into a PR.
    if run_step 'gitleaks detect' \
        gitleaks detect --source "${REPO_ROOT}" --redact --no-banner; then
        pass 'secret scan'
    else
        record 'gitleaks detect'
    fi
else
    skip 'gitleaks secret scan' \
        'gitleaks not installed. Install it (https://github.com/gitleaks/gitleaks) before merging. NOT a pass.'
    SKIPPED+=('gitleaks')
fi

# --- Summary ---------------------------------------------------------------
printf '\n%s%s%s\n' "${C_BLUE}" '── summary ──' "${C_RESET}"

if (( ${#FAILED[@]} )); then
    printf '%s%d check(s) failed:%s\n' "${C_RED}" "${#FAILED[@]}" "${C_RESET}"
    for f in "${FAILED[@]}"; do printf '  - %s\n' "${f}"; done
    exit 1
fi

if (( ${#SKIPPED[@]} )); then
    printf '%s%d check(s) skipped — these are NOT passes:%s\n' \
        "${C_YELLOW}" "${#SKIPPED[@]}" "${C_RESET}"
    for s in "${SKIPPED[@]}"; do printf '  - %s\n' "${s}"; done
fi

printf '%sall executed checks passed%s\n' "${C_GREEN}" "${C_RESET}"